**FEDERAL AVIATION ADMINISTRATION**

**JOINT AIRCRAFT SYSTEM/COMPONENT CODE**

**TABLE AND DEFINITIONS**

**INFORMATION LAST UPDATED**

**February 11, 2002**

**PREPARED BY**

**FEDERAL AVIATION ADMINISTRATION**

**FLIGHT STANDARDS SERVICE**

**REGULATORY SUPPORT DIVISION**

**AVIATION DATA SYSTEMS BRANCH, AFS-620**

**MIKE MONRONEY AERONAUTICAL CENTER**

**OKLAHOMA CITY, OKLAHOMA 73125**

JOINT AIRCRAFT SYSTEM/COMPONENT

CODE TABLE

**PREFACE**

The Joint Aircraft System/Component (JASC) Code Table is a modified
version of the Air Transport Association of America (ATA), Specification
100 code. It was developed by the FAA\'s, Regulatory Support Division
(AFS-600).

Over the years, the JASC code format of the ATA Spec 100 code has gained
widespread industry acceptance. In a harmonized effort, the FAA's
counterparts in Australia and Canada have adopted the JASC code with
only a few exceptions. Some Canadian aircraft manufacturers have also
adopted this new standard.

This code table is constructed by using the new JASC code four (4) digit
format, along with an abbreviated code title. The abbreviated titles
have been modified in some cases to clarify the intended use of the
accompanying code. This table can be used as a quick reference chart, to
assist in the coding and review of aircraft structures or systems data
(i.e., Service Difficulty Report (SDR), Accident/Incident Report (AID)).

The current coding scheme used in the JASC code was introduced in May
1991, for the technical classification of SDR's. Its predecessor, the
FAA aircraft system/component code, is a similar but more complex
eight-digit code, which was developed over 25 years ago. It was
constructed around the computer technology of that period. It consisted
of four digit numerical code plus four alpha character code to make data
retrieval possible. Since that time, computer technology has advanced
many fold. Reducing the code from eight to four characters simplifies
coding, and in some cases, makes JASC coding match the ATA Specification
100 first three digits, which are used to identify aircraft systems. The
ATA code does not reference the fourth digit, so it is free to be used
for identifying components.

The JASC code aircraft structural section has increased due to problems
inherent with aging aircraft. As an example, FAA code 5301 SXBD was
expanded to 20 items due to the high rate of reporting in this area for
the year 1989 (8021 reports were received). In some instances, there was
very little reporting and codes were combined into other systems if the
safety impact was not significant. The overall reduction in codes has
been from 568 FAA codes to 488 JASC codes, with the significant increase
being in the structural area as stated earlier.

The JASC code divides the engine section into two code groups to
separate the turbine and reciprocating engines. The codes for the
turbine engines are in JASC code Chapter 72, Turbine/Turboprop Engine.
The codes for the reciprocating engines are now exclusively found in
JASC code Chapter 85, Reciprocating Engine.

The other major deviation from ATA Spec 100 is in ATA section 2730,
specifically involves the stall warning system. Early technology
(primarily on smaller aircraft) directly linked the sensing of flight
attitude to one of the components that furnished the means of manually
controlling the flight attitude characteristics (elevator). Today, most
large transport category aircraft utilize electronic units to sense the
change in the environmental condition called stall, and use the data to
influence navigation. ATA section 3410, Flight Environment Data,
includes high-speed warning in its code definition. Stall warning (low
speed) is the reciprocal term of high speed warning, so its filing under
the same code appears more logical. Thus, with the JASC code it was
decided to move the stall warning system to Chapter 34 under the
separate JASC code 3418, Stall Warning System.

The FAA is continuing to pursue worldwide involvement from operators and
manufacturers in addressing the need for international standardization
of aircraft system/component codes. The ultimate goal is to develop a
universal aircraft/component numbering standard which can be used in the
manufacturer's maintenance manual, wiring diagram manual, system manuals
and illustrated parts catalog. This harmonized standard must be a usable
standard for the aircraft manufacturers, air carrier operators and the
general aviation community.

We welcome comments and feedback regarding the possible forming of
working groups to achieve this long range consideration of possibly
harmonizing the ATA Specification 100 code and the JASC code.

**TABLE OF CONTENTS**

**CODE
TABLE\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...1-5**

**System/Code/Titles Page \#**

**AIRCRAFT 6**

**11 Placards and Markings 6**

**12 Servicing 6**

####  14 Hardware 6

**18 Helicopter Vibration 6**

**AIRFRAME SYSTEMS 7**

**21 Air Conditioning 7**

**22 Auto Flight 10**

**23 Communications 10**

**24 Electrical Power 11**

**25 Equipment/Furnishings 13**

**26 Fire Protection 15**

**27 Flight Controls 16**

**28 Fuel 19**

**29 Hydraulic Power 21**

**30 Ice and Rain Protection 23**

**31 Instruments 24**

**32 Landing Gear 25**

**33 Lights 29**

**34 Navigation 29**

**35 Oxygen 35**

**36 Pneumatic 35**

**37 Vacuum 36**

**38 Water/Waste 36**

**45 Central Maintenance System (CMS) 37**

**49 Airborne Auxiliary Power 37**

**51 Standard Practices/Structures 38**

**52 Doors 39**

**53 Fuselage 41**

**54 Nacelles/Pylons 43**

**55 Stabilizers 44**

**56 Windows 46**

**57 Wings 47**

**PROPELLER/ROTOR SYSTEMS 49**

**61 Propellers/Propulsors 49**

**62 Main Rotor 50**

**63 Main Rotor Drive 51**

**64 Tail Rotor 52**

**[TABLE OF CONTENTS CONT'D]{.underline}**

**65 Tail Rotor Drive 52**

**67 Rotors Flight Control 53**

**POWERPLANT SYSTEM 53**

**71 Powerplant 53**

**72 Turbine/Turboprop Engine 55**

**73 Engine Fuel and Control 56**

**74 Ignition 58**

**75 Air 59**

**76 Engine Controls 60**

**77 Engine Indicating 60**

**78 Engine Exhaust. 62**

**79 Engine Oil 62**

**80 Starting 64**

**81 Turbocharging 64**

**82 Water Injection 64**

**83 Accessory Gearboxes 65**

**85 Reciprocating Engine 65**

**GLOSSARY\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\.....67-60**

**PART NAME REFERENCE
TABLE\...\...\...\...\...\...\...\...\...\...\...71-75**

**PART CONDITION REFERENCE
TABLE\...\...\...\...\...\...\...\...\....76-77**

**JASC CODE FEEDBACK
INFORMATION\...\...\...\...\...\...\...\...\...\....78**

[JOINT AIRCRAFT]{.underline}

[SYSTEM/COMPONENT]{.underline}

[CODE TABLE]{.underline}

**JASC/ TITLE**

**[11 PLACARDS AND MARKINGS]{.underline}**

1100 PLACARDS AND MARKINGS

**[12 SERVICING]{.underline}**

1210 FUEL SERVICING

1220 OIL SERVICING

1230 HYDRAULIC FLUID SERVICING

1240 COOLANT SERVICING

**[14 HARDWARE]{.underline}**

1400 MISCELLANEOUS HARDWARE

1410 HOSES AND TUBES

1420 ELECTRICAL CONNECTORS

1430. FASTENERS

1497 MISCELLANEOUS WIRING

**[18 HELICOPTER VIBRATION]{.underline}**

1800 HELICOPTER VIB/NOISE ANALYSIS

1810 HELICOPTER VIBRATION ANALYSIS

1820. HELICOPTER NOISE ANALYSIS

1897 HELICOPTER VIBRATION SYSTEM WIRING

**[21 AIR CONDITIONING]{.underline}**

2100 AIR CONDITIONING SYSTEM

2110 CABIN COMPRESSOR SYSTEM

2120 AIR DISTRIBUTION SYSTEM

2121 AIR DISTRIBUTION FAN

2130 CABIN PRESSURE CONTROL SYSTEM

2131 CABIN PRESSURE CONTROLLER

2132 CABIN PRESSURE INDICATOR

2133 PRESSURE REGUL/OUTFLOW VALVE

2134 CABIN PRESSURE SENSOR

2140 HEATING SYSTEM

2150 CABIN COOLING SYSTEM

2160 CABIN TEMPERATURE CONTROL SYSTEM

2161 CABIN TEMPERATURE CONTROLLER

2162 CABIN TEMPERATURE INDICATOR

2163 CABIN TEMPERATURE SENSOR

2170. HUMIDITY CONTROL SYSTEM

2197 AIR CONDITIONING SYSTEM WIRING

**[22 AUTO FLIGHT]{.underline}**

2200 AUTO FLIGHT SYSTEM

2210 AUTOPILOT SYSTEM

2211 AUTOPILOT COMPUTER

2212 ALTITUDE CONTROLLER

2213 FLIGHT CONTROLLER

2214 AUTOPILOT TRIM INDICATOR

2215 AUTOPILOT MAIN SERVO

2216 AUTOPILOT TRIM SERVO

2220 SPEED-ATTITUDE CORRECT. SYSTEM

2230 AUTO THROTTLE SYSTEM

2250. AERODYNAMIC LOAD ALLEVIATING

2297 AUTOFLIGHT SYSTEM WIRING

**[23 COMMUNICATIONS]{.underline}**

2300 COMMUNICATIONS SYSTEM

2310 HF COMMUNICATION SYSTEM

2311 UHF COMMUNICATION SYSTEM

2312 VHF COMMUNICATION SYSTEM

2320 DATA TRANSMISSION AUTO CALL

2330 ENTERTAINMENT SYSTEM

2340 INTERPHONE/PASSENGER PA SYSTEM

2350 AUDIO INTEGRATING SYSTEM

2360 STATIC DISCHARGE SYSTEM

2370. AUDIO/VIDEO MONITORING

2397 COMMUNICATION SYSTEM WIRING

**[24 ELECTRICAL POWER]{.underline}**

2400 ELECTRICAL POWER SYSTEM

2410 ALTERNATOR-GENERATOR DRIVE

2420 AC GENERATION SYSTEM

2421 AC GENERATOR-ALTERNATOR

2422 AC INVERTER

2423 PHASE ADAPTER

2424 AC REGULATOR

2425 AC INDICATING SYSTEM

2430 DC GENERATING SYSTEM

2431 BATTERY OVERHEAT WARN. SYSTEM

2432 BATTERY/CHARGER SYSTEM

2433 DC RECTIFIER/CONVERTER

2434 DC GENERATOR-ALTERNATOR

2435 STARTER-GENERATOR

2436 DC REGULATOR

2437 DC INDICATING SYSTEM

2440 EXTERNAL POWER SYSTEM

2450 AC POWER DISTRIBUTION SYSTEM

2460. DC POWER/DISTRIBUTION SYSTEM

2497 ELECTRICAL POWER SYSTEM WIRING

**[25 EQUIPMENT/FURNISHINGS]{.underline}**

2500 CABIN EQUIPMENT/FURNISHINGS

2510 FLIGHT COMPARTMENT EQUIPMENT

2520 PASSENGER COMPARTMENT EQUIPMENT

2530 BUFFET/GALLEYS

2540 LAVATORIES

2550 CARGO COMPARTMENTS

2551 AGRICULTURAL SPRAY SYSTEM

2560 EMERGENCY EQUIPMENT

2561 LIFE JACKET

2562 EMERGENCY LOCATOR BEACON

2563 PARACHUTE

2564 LIFE RAFT

2565. ESCAPE SLIDE

2570 ACCESSORY COMPARTMENT

2571 BATTERY BOX STRUCTURE

2572. ELECTRONIC SHELF SECTION

2597 EQUIP/FURNISHING SYSTEM WIRING

**[26 FIRE PROTECTION]{.underline}**

2600 FIRE PROTECTION SYSTEM

2610 DETECTION SYSTEM

2611 SMOKE DETECTION

2612 FIRE DETECTION

2613 OVERHEAT DETECTION

2620 EXTINGUISHING SYSTEM

2621 FIRE BOTTLE, FIXED

2622. FIRE BOTTLE, PORTABLE

2697 FIRE PROTECTION SYSTEM WIRING

**[27 FLIGHT CONTROLS]{.underline}**

2700 FLIGHT CONTROL SYSTEM

2701 CONTROL COLUMN SECTION

2710 AILERON CONTROL SYSTEM

2711 AILERON TAB CONTROL SYSTEM

2720 RUDDER CONTROL SYSTEM

2721 RUDDER TAB CONTROL SYSTEM

2722 RUDDER ACTUATOR

2730 ELEVATOR CONTROL SYSTEM

2731 ELEVATOR TAB CONTROL SYSTEM

2740 STABILIZER CONTROL SYSTEM

2741 STABILIZER POSITION INDICATING

2742 STABILIZER ACTUATOR

2750 TE FLAP CONTROL SYSTEM

2751 TE FLAP POSITION IND. SYSTEM

2752 TE FLAP ACTUATOR

2760 DRAG CONTROL SYSTEM

2761 DRAG CONTROL ACTUATOR

2770 GUST LOCK/DAMPER SYSTEM

2780 LE SLAT CONTROL SYSTEM

2781 LE SLAT POSITION IND. SYSTEM

2782. LE SLAT ACTUATOR

2797 FLIGHT CONTROL SYSTEM WIRING

**[28 FUEL]{.underline}**

2800 AIRCRAFT FUEL SYSTEM

2810 FUEL STORAGE

2820 ACFT FUEL DISTRIB. SYSTEM

2821 ACFT FUEL FILTER/STRAINER

2822 FUEL BOOST PUMP

2823 FUEL SELECTOR/SHUT-OFF VALVE

2824 FUEL TRANSFER VALVE

2830 FUEL DUMP SYSTEM

2840 ACFT FUEL INDICATING SYSTEM

2841 FUEL QUANTITY INDICATOR

2842 FUEL QUANTITY SENSOR

2843 FUEL TEMPERATURE INDICATOR

2844. FUEL PRESSURE INDICATOR

2897 FUEL SYSTEM WIRING

**[29 HYDRAULIC POWER]{.underline}**

2900 HYDRAULIC POWER SYSTEM

2910 HYDRAULIC SYSTEM, MAIN

2911 HYDRAULIC POWER ACCUMULATOR, MAIN

2912 HYDRAULIC FILTER, MAIN

2913 HYDRAULIC PUMP, (ELECT/ENG), MAIN

2914 HYDRAULIC HANDPUMP, MAIN

2915 HYDRAULIC PRESSURE RELIEF VLV, MAIN

2916 HYDRAULIC RESERVOIR, MAIN

2917 HYDRAULIC PRESSURE REGULATOR, MAIN

2920 HYDRAULIC SYSTEM, AUXILIARY

2921 HYDRAULIC ACCUMULATOR, AUXILIARY

2922 HYDRAULIC FILTER, AUXILIARY

2923 HYDRAULIC PUMP, AUXILIARY

2925 HYDRAULIC PRESSURE RELIEF, AUXILIARY

2926 HYDRAULIC RESERVOIR, AUXILIARY

2927 HYDRAULIC PRESSURE REGULATOR, AUX.

2930 HYDRAULIC INDICATING SYSTEM

2931 HYDRAULIC PRESSURE INDICATOR

2932 HYDRAULIC PRESSURE SENSOR

2933 HYDRAULIC QUANTITY INDICATOR

2934. HYDRAULIC QUANTITY SENSOR

2997 HYDRAULIC POWER SYSTEM WIRING

**[30 ICE AND RAIN PROTECTION]{.underline}**

3000 ICE/RAIN PROTECTION SYSTEM

3010 AIRFOIL ANTI/DE-ICE SYSTEM

3020 AIR INTAKE ANTI/DE-ICE SYSTEM

3030 PITOT/STATIC ANTI-ICE SYSTEM

3040 WINDSHIELD/DOOR RAIN/ICE REMOVAL

3050 ANTENNA/RADOME ANTI-ICE/DE-ICE SYSTEM

3060 PROP/ROTOR ANTI-ICE/DE-ICE SYSTEM

3070 WATER LINE ANTI-ICE SYSTEM

3080. ICE DETECTION

3097 ICE/RAIN PROTECTION SYSTEM WIRING

**[31 INSTRUMENTS]{.underline}**

3100 INDICATING/RECORDING SYSTEM

3110 INSTRUMENT PANEL

3120 INDEPENDENT INSTRUMENTS (CLOCK, ETC.)

3130 DATA RECORDERS (FLT/MAINT)

3140 CENTRAL COMPUTERS (EICAS)

3150 CENTRAL WARNING

3160 CENTRAL DISPLAY

3170. AUTOMATIC DATA

3197 INSTRUMENT SYSTEM WIRING

**[32 LANDING GEAR]{.underline}**

3200 LANDING GEAR SYSTEM

3201 LANDING GEAR/WHEEL FAIRING

3210 MAIN LANDING GEAR

3211 MAIN LANDING GEAR ATTACH SECTION

3212 EMERGENCY FLOTATION SECTION

3213 MAIN LANDING GEAR STRUT/AXLE/TRUCK

3220 NOSE/TAIL LANDING GEAR

3221 NOSE/TAIL LANDING GEAR ATTACH SECTION

3222 NOSE/TAIL LANDING GEAR STRUT/AXLE

3230 LANDING GEAR RETRACT/EXTEND SYSTEM

3231 LANDING GEAR DOOR RETRACT SECTION

3232 LANDING GEAR DOOR ACTUATOR

3233 LANDING GEAR ACTUATOR

3234 LANDING GEAR SELECTOR

3240 LANDING GEAR BRAKE SYSTEM

3241 BRAKE ANTI-SKID SECTION

3242 BRAKE

3243 MASTER CYLINDER/BRAKE VALVE

3244 TIRE

3245 TIRE TUBE

3246 WHEEL/SKI/FLOAT

3250 LANDING GEAR STEERING SYSTEM

3251 STEERING UNIT

3252 SHIMMY DAMPER

3260 LANDING GEAR POSITION AND WARNING

3270. AUXILIARY GEAR (TAIL SKID)

3297 LANDING GEAR SYSTEM WIRING

**[33 LIGHTS]{.underline}**

3300 LIGHTING SYSTEM

3310. FLIGHT COMPARTMENT LIGHTING

3320 PASSENGER COMPARTMENT LIGHTING

3330 CARGO COMPARTMENT LIGHTING

3340 EXTERIOR LIGHTING

3350. EMERGENCY LIGHTING

3397 LIGHT SYSTEM WIRING

**[34 NAVIGATION]{.underline}**

3400 NAVIGATION SYSTEM

3410 FLIGHT ENVIRONMENT DATA

3411 PITOT/STATIC SYSTEM

3412 OUTSIDE AIR TEMP. IND./SENSOR

3413 RATE OF CLIMB INDICATOR

3414 AIRSPEED/MACH INDICATOR

3415 HIGH SPEED WARNING

3416 ALTIMETER, BAROMETRIC/ENCODER

3417 AIR DATA COMPUTER

3418 STALL WARNING SYSTEM

3420 ATTITUDE AND DIRECTION DATA SYSTEM

3421 ATTITUDE GYRO AND IND. SYSTEM

3422 DIRECTIONAL GYRO AND IND. SYSTEM

3423 MAGNETIC COMPASS

3424 TURN AND BANK/RATE OF TURN INDICATOR

3425 INTEGRATED FLT. DIRECTOR SYSTEM

3430 LANDING AND TAXI AIDS

3431 LOCALIZER/VOR SYSTEM

3432 GLIDE SLOPE SYSTEM

3433 MICROWAVE LANDING SYSTEM

3434 MARKER BEACON SYSTEM

3435 HEADS UP DISPLAY SYSTEM

3436 WIND SHEAR DETECTION SYSTEM

3440 INDEPENDENT POS. DETERMINING SYSTEM

3441 INERTIAL GUIDANCE SYSTEM

3442 WEATHER RADAR SYSTEM

3443 DOPPLER SYSTEM

3444 GROUND PROXIMITY SYSTEM

3445 AIR COLLISION AVOIDANCE SYSTEM (TCAS)

3446 NON RADAR WEATHER SYSTEM

3450 DEPENDENT POSITION DETERMINING SYSTEM

3451 DME/TACAN SYSTEM

3452 ATC TRANSPONDER SYSTEM

3453 LORAN SYSTEM

3454 VOR SYSTEM

3455 ADF SYSTEM

3456 OMEGA NAVIGATION SYSTEM

3457 GLOBAL POSITIONING SYSTEM

3460 FLIGHT MANAGE. COMPUTING HARDWARE SYS

3461. FLIGHT MANAGE. COMPUTING SOFTWARE SYS

3497 NAVIGATION SYSTEM WIRING

**[35 OXYGEN]{.underline}**

3500 OXYGEN SYSTEM

3510 CREW OXYGEN SYSTEM

3520 PASSENGER OXYGEN SYSTEM

3530. PORTABLE OXYGEN SYSTEM

3597 OXYGEN SYSTEM WIRING

**[36 PNEUMATIC]{.underline}**

3600 PNEUMATIC SYSTEM

3610 PNEUMATIC DISTRIBUTION SYSTEM

3620. PNEUMATIC INDICATING SYSTEM

3697 PNEUMATIC SYSTEM WIRING

**[37 VACUUM]{.underline}**

3700 VACUUM SYSTEM

3710 VACUUM DISTRIBUTION SYSTEM

3720. VACUUM INDICATING SYSTEM

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3797. VACUUM SYSTEM WIRING

**[38 WATER/WASTE]{.underline}**

3800 WATER AND WASTE SYSTEM

3810 POTABLE WATER SYSTEM

3820 WASH WATER SYSTEM

3830 WASTE DISPOSAL SYSTEM

3840. AIR SUPPLY (WATER PRESS. SYSTEM)

3897 WATER/WASTE SYSTEM WIRING

**[45 CENTRAL MAINT. SYSTEM]{.underline}**

4500. CENTRAL MAINT. COMPUTER

4597 CENTRAL MAINT. SYSTEM WIRING

**[49 AIRBORNE AUXILIARY POWER]{.underline}**

4900 AIRBORNE APU SYSTEM

4910 APU COWLING/CONTAINMENT

4920 APU CORE ENGINE

4930 APU ENGINE FUEL AND CONTROL

4940 APU START/IGNITION SYSTEM

4950 APU BLEED AIR SYSTEM

4960 APU CONTROLS

4970 APU INDICATING SYSTEM

4980 APU EXHAUST SYSTEM

4990. APU OIL SYSTEM

4997 APU SYSTEM WIRING

**[51 STANDARD PRACTICES/STRUCTURES]{.underline}**

5100 STANDARD PRACTICES/STRUCTURES

5101 AIRCRAFT STRUCTURES

5102 BALLOON REPORTS

**[52 DOORS]{.underline}**

5200 DOORS

5210 PASSENGER/CREW DOORS

5220 EMERGENCY EXITS

5230 CARGO/BAGGAGE DOORS

5240 SERVICE DOORS

5241 GALLEY DOORS

5242 E/E COMPARTMENT DOORS

5243 HYDRAULIC COMPARTMENT DOORS

5244 ACCESSORY COMPARTMENT DOORS

5245 AIR CONDITIONING COMPART. DOORS

5246 FLUID SERVICE DOORS

5247 APU DOORS

5248 TAIL CONE DOORS

5250 FIXED INNER DOORS

5260 ENTRANCE STAIRS

5270 DOOR WARNING SYSTEM

5280. LANDING GEAR DOORS

5297 DOOR SYSTEM WIRING

**[53 FUSELAGE]{.underline}**

5300 FUSELAGE STRUCTURE (GENERAL)

5301 AERIAL TOW EQUIPMENT

5302 ROTORCRAFT TAIL BOOM

5310 FUSELAGE MAIN, STRUCTURE

5311 FUSELAGE MAIN, FRAME

5312 FUSELAGE MAIN, BULKHEAD

5313 FUSELAGE MAIN, LONGERON/STRINGER

5314 FUSELAGE MAIN, KEEL

5315 FUSELAGE MAIN, FLOOR BEAM

5320 FUSELAGE MISCELLANEOUS STRUCTURE

5321 FUSELAGE FLOOR PANEL

5322 FUSELAGE INTERNAL MOUNT STRUCTURE

5323 FUSELAGE INTERNAL STAIRS

5324 FUSELAGE FIXED PARTITIONS

5330 FUSELAGE MAIN, PLATE/SKIN

5340 FUSELAGE MAIN, ATTACH FITTINGS

5341 FUSELAGE, WING ATTACH FITTINGS

5342 FUSELAGE, STABILIZER ATTACH FITTINGS

5343 LANDING GEAR ATTACH FITTINGS

5344 FUSELAGE DOOR HINGES

5345 FUSELAGE EQUIPMENT ATTACH FITTINGS

5346 POWERPLANT ATTACH FITTINGS

5347 SEAT/CARGO ATTACH FITTINGS

5350. AERODYNAMIC FAIRINGS

5397 FUSELAGE WIRING

**[54 NACELLES/PYLONS]{.underline}**

5400 NACELLE/PYLON STRUCTURE

5410 NACELLE/PYLON, MAIN FRAME

5411 NACELLE/PYLON, FRAME/SPAR/RIB

5412 NACELLE/PYLON, BULKHEAD/FIREWALL

5413 NACELLE/PYLON, LONGERON/STRINGER

5414 NACELLE/PYLON, PLATE SKIN

5415 NACELLE/PYLON, ATTACH FITTINGS

5420. NACELLE/PYLON MISCELLANEOUS STRUCTURE

5497 NACELLE/PYLON SYSTEM WIRING

**[55 STABILIZERS]{.underline}**

5500 EMPENNAGE STRUCTURE

5510 HORIZONTAL STABILIZER STRUCTURE

5511 HORIZONTAL STABILIZER, SPAR/RIB

5512 HORIZONTAL STABILIZER, PLATE/SKIN

5513 HORIZONTAL STABILIZER, TAB STRUCTURE

5514 HORIZ STAB MISCELLANEOUS STRUCTURE

5520 ELEVATOR STRUCTURE

5521 ELEVATOR, SPAR/RIB STRUCTURE

5522 ELEVATOR, PLATES/SKIN STRUCTURE

5523 ELEVATOR, TAB STRUCTURE

5524 ELEVATOR MISCELLANEOUS STRUCTURE

5530 VERTICAL STABILIZER STRUCTURE

5531 VERTICAL STABILIZER, SPAR/RIB STRUCTURE

5532 VERTICAL STABILIZER, PLATES/SKIN

5533 VENTRAL STRUCTURE

5534 VERT. STAB. MISCELLANEOUS STRUCTURE

5540 RUDDER STRUCTURE

5541 RUDDER, SPAR/RIB

5542 RUDDER, PLATE/SKIN

5543 RUDDER, TAB STRUCTURE

5544 RUDDER MISCELLANEOUS STRUCTURE

5550 EMPENNAGE FLT. CONT., ATTACH FITTING

5551 HORIZONTAL STABILIZER, ATTACH FITTING

5552 ELEVATOR/TAB, ATTACH FITTINGS

5553 VERT. STAB., ATTACH FITTINGS

5554. RUDDER/TAB, ATTACH FITTINGS

5597 STABILIZER SYSTEM WIRING

**[56 WINDOWS]{.underline}**

5600 WINDOW/WINDSHIELD SYSTEM

5610 FLIGHT COMPARTMENT WINDOWS

5620 PASSENGER COMPARTMENT WINDOWS

5630 DOOR WINDOWS

5640. INSPECTION WINDOWS

5697 WINDOW SYSTEM WIRING

**[57 WINGS]{.underline}**

5700 WING STRUCTURE

5710 WING, MAIN FRAME STRUCTURE

5711 WING SPAR

5712 WING, RIB/BULKHEAD

5713 WING, LONGERON/STRINGER

5714 WING, CENTER BOX

5720 WING MISCELLANEOUS STRUCTURE

5730 WING, PLATES/SKINS

5740 WING, ATTACH FITTINGS

5741 WING, FUSELAGE ATTACH FITTINGS

5742 WING, NAC/PYLON ATTACH FITTINGS

5743 WING, LANDING GEAR ATTACH FITTINGS

5744 WING, CONTROL SURFACE ATTACH FITTINGS

5750 WING, CONTROL SURFACES

5751 AILERONS

5752 AILERON TAB STRUCTURE

5753 TRAILING EDGE FLAPS

5754 LEADING EDGE DEVICES

5755. SPOILERS

5797 WING SYSTEM WIRING

**[61 PROPELLERS/PROPULSORS]{.underline}**

6100 PROPELLER SYSTEM

6110 PROPELLER ASSEMBLY

6111 PROPELLER BLADE SECTION

6112 PROPELLER DE-ICE BOOT SECTION

6113 PROPELLER SPINNER SECTION

6114 PROPELLER HUB SECTION

6120 PROPELLER CONTROLLING SYSTEM

6121 PROPELLER SYNCHRONIZER SECTION

6122 PROPELLER GOVERNOR

6123 PROPELLER FEATHERING/REVERSING

6130 PROPELLER BRAKING

6140. PROPELLER INDICATING SYSTEM

6197 PROPELLER/PROPULSORS SYSTEM WIRING

**[62 MAIN ROTOR]{.underline}**

6200 MAIN ROTOR SYSTEM

6210 MAIN ROTOR BLADES

6220 MAIN ROTOR HEAD

6230 MAIN ROTOR MAST/SWASHPLATE

6240. MAIN ROTOR INDICATING SYSTEM

6297 MAIN ROTOR SYSTEM WIRING

**[63 MAIN ROTOR DRIVE]{.underline}**

6300 MAIN ROTOR DRIVE SYSTEM

6310 ENGINE/TRANSMISSION COUPLING

6320 MAIN ROTOR GEARBOX

6321 MAIN ROTOR BRAKE

6322 ROTORCRAFT COOLING FAN SYSTEM

6330 MAIN ROTOR TRANSMISSION MOUNT

6340. ROTOR DRIVE INDICATING SYSTEM

6397 MAIN ROTOR DRIVE SYSTEM WIRING

**[64 TAIL ROTOR]{.underline}**

6400 TAIL ROTOR SYSTEM

6410 TAIL ROTOR BLADES

6420 TAIL ROTOR HEAD

6440. TAIL ROTOR INDICATING SYSTEM

6497 TAIL ROTOR SYSTEM WIRING

**[65 TAIL ROTOR DRIVE]{.underline}**

6500 TAIL ROTOR DRIVE SYSTEM

6510 TAIL ROTOR DRIVE SHAFT

6520 TAIL ROTOR GEARBOX

6540. TAIL ROTOR DRIVE INDICATING SYSTEM

6597 TAIL ROTOR DRIVE SYSTEM WIRING

**[67 ROTORS FLIGHT CONTROL]{.underline}**

6700 ROTORCRAFT FLIGHT CONTROL

6710 MAIN ROTOR CONTROL

6711 TILT ROTOR FLIGHT CONTROL

6720. TAIL ROTOR CONTROL SYSTEM

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6730. ROTORCRAFT SERVO SYSTEM

6797 ROTORS FLIGHT CONTROL SYSTEM WIRING

**[71 POWERPLANT]{.underline}**

7100 POWERPLANT SYSTEM

7110 ENGINE COWLING SYSTEM

7111 ENGINE COWL FLAPS

7112 ENGINE AIR BAFFLE SECTION

7120 ENGINE MOUNT SECTION

7130 ENGINE FIRESEALS

7160 ENGINE AIR INTAKE SYSTEM

7170. ENGINE DRAINS

7197 POWERPLANT SYSTEM WIRING

**[72 TURBINE/TURBOPROP ENGINE]{.underline}**

7200 ENGINE (TURBINE/TURBOPROP)

7210 TURBINE ENGINE REDUCTION GEAR

7220 TURBINE ENGINE AIR INLET SECTION

7230 TURBINE ENGINE COMPRESSOR SECTION

7240 TURBINE ENGINE COMBUSTION SECTION

7250 TURBINE SECTION

7260 TURBINE ENGINE ACCESSORY DRIVE

7261 TURBINE ENGINE OIL SYSTEM

7270. TURBINE ENGINE BYPASS SECTION

7297 TURBINE ENGINE SYSTEM WIRING

**[73 ENGINE FUEL AND CONTROL]{.underline}**

7300 ENGINE FUEL AND CONTROL

7310 ENGINE FUEL DISTRIBUTION

7311 ENGINE FUEL/OIL COOLER

7312 FUEL HEATER

7313 FUEL INJECTOR NOZZLE

7314 ENGINE FUEL PUMP

7320 FUEL CONTROLLING SYSTEM

7321 FUEL CONTROL/TURBINE ENGINES

7322 FUEL CONTROL/RECEIPROCATING ENGINES

7323 TURBINE GOVERNOR

7324 FUEL DIVIDER

7330 ENGINE FUEL INDICATING SYSTEM

7331 FUEL FLOW INDICATING

7332 FUEL PRESSURE INDICATING

7333 FUEL FLOW SENSOR

7334. FUEL PRESSURE SENSOR

7397 ENGINE FUEL SYSTEM WIRING

**[74 IGNITION]{.underline}**

7400 IGNITION SYSTEM

7410 IGNITION POWER SUPPLY

7411 LOW TENSION COIL

7412 EXCITER

7413 INDUCTION VIBRATOR

7414 MAGNETO/DISTRIBUTOR

7420 IGNITION HARNESS (DISTRIBUTION)

7421 SPARK PLUG/IGNITER

7430. IGNITION/STARTER SWITCHING

7497 IGNITION SYSTEM WIRING

**[75 AIR]{.underline}**

7500 ENGINE BLEED AIR SYSTEM

7510 ENGINE ANTI-ICING SYSTEM

7520 ENGINE COOLING SYSTEM

7530 COMPRESSOR BLEED CONTROL

7531 COMPRESSOR BLEED GOVERNOR

7532 COMPRESSOR BLEED VALVE

7540. BLEED AIR INDICATING SYSTEM

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7597. ENGINE BLEED AIR SYSTEM WIRING

**[76 ENGINE CONTROLS]{.underline}**

7600 ENGINE CONTROLS

7601 ENGINE SYNCHRONIZING

7602 MIXTURE CONTROL

7603 POWER LEVER

7620. ENGINE EMERGENCY SHUTDOWN SYSTEM

7697 ENGINE CONTROL SYSTEM WIRING

**[77 ENGINE INDICATING]{.underline}**

7700 ENGINE INDICATING SYSTEM

7710 POWER INDICATING SYSTEM

7711 ENGINE PRESSURE RATIO (EPR)

7712 ENGINE BMEP/TORQUE INDICATING

7713 MANIFOLD PRESSURE (MP) INDICATING

7714 ENGINE RPM INDICATING SYSTEM

7720 ENGINE TEMP. INDICATING SYSTEM

7721 CYLINDER HEAD TEMP (CHT) INDICATING

7722 ENG. EGT/TIT INDICATING SYSTEM

7730 ENGINE IGNITION ANALYZER SYSTEM

7731 ENGINE IGNITION ANALYZER

7732 ENGINE VIBRATION ANALYZER

7740. ENGINE INTEGRATED INSTRUMENT SYSTEM

7797 ENGINE INDICATING SYSTEM WIRING

**[78 ENGINE EXHAUST]{.underline}**

7800 ENGINE EXHAUST SYSTEM

7810 ENGINE COLLECTOR/TAILPIPE/NOZZLE

7820 ENGINE NOISE SUPPRESSOR

7830. THRUST REVERSER

7897 ENGINE EXHAUST SYSTEM WIRING

**[79 ENGINE OIL]{.underline}**

7900 ENGINE OIL SYSTEM (AIRFRAME)

7910 ENGINE OIL STORAGE (AIRFRAME)

7920 ENGINE OIL DISTRIBUTION (AIRFRAME)

7921 ENGINE OIL COOLER

7922 ENGINE OIL TEMP. REGULATOR

7923 ENGINE OIL SHUTOFF VALVE

7930 ENGINE OIL INDICATING SYSTEM

7931 ENGINE OIL PRESSURE

7932 ENGINE OIL QUANTITY

7933. ENGINE OIL TEMPERATURE

7997 ENGINE OIL SYSTEM WIRING

**[80 STARTING]{.underline}**

8000 ENGINE STARTING SYSTEM

8010 ENGINE CRANKING

8011 ENGINE STARTER

8012. ENGINE START VALVES/CONTROLS

8097 ENGINE STARTING SYSTEM WIRING

**[81 TURBOCHARGING]{.underline}**

8100 EXHAUST TURBINE SYSTEM (RECIP)

8110 POWER RECOVERY TURBINE (RECIP)

8120. EXHAUST TURBOCHARGER

8197 TURBOCHARGING SYSTEM WIRING

**[82 WATER INJECTION]{.underline}**

8200. WATER INJECTION SYSTEM

8297 WATER INJECTION SYSTEM WIRING

**[83 ACCESSORY GEARBOXES]{.underline}**

8300. ACCESSORY GEARBOXES

8397 ACCESSORY GEARBOX SYSTEM WIRING

**[85 RECIPROCATING ENGINE]{.underline}**

8500 ENGINE (RECIPROCATING)

8510 RECIPROCATING ENGINE FRONT SECTION

8520 RECIPROCATING ENGINE POWER SECTION

8530 RECIPROCATING ENGINE CYLINDER SECTION

8540 RECIPROCATING ENGINE REAR SECTION

8550. RECIPROCATING ENGINE OIL SYSTEM

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8560. RECIPROCATING ENGINE SUPERCHARGER

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8570. RECIPROCATING ENGINE LIQUID COOLING

8597 RECIPROCATING ENGINE SYSTEM WIRING

**SYSTEM CODES - TITLE**

**DEFINITIONS**

**[AIRCRAFT]{.underline}**

**11 - Placards and Markings**

**[1100 Placards and Markings]{.underline}**

For reports on all placards, decals, and markings installed by the
manufacturer including those required by government regulations. The
report should include the system or component involved. The aircraft
make and model is required. The location of the item is essential for a
meaningful report. Such information should be extracted from the text
and entered in the proper data fields (Example: Item = placard; location
= entrance door; part condition = missing. Text= the \"closed and
locked\" decal is missing from the main passenger entrance door).

**[12 ‑ Servicing]{.mark}**

**[1210 Fuel Servicing]{.underline}**

For reports indicating a problem relating to any type of aviation fuel.
The general instructions are not applicable to any particular system.

**[1220 Oil Servicing]{.underline}**

For reports indicating a problem relating to aviation lubricating oil.
The general instructions are not applicable to any particular system.

**[1230 Hydraulic Fluid Servicing]{.underline}**

For reports which indicate a problem with any type of hydraulic fluid.
The general instructions are not applicable to any particular system.

**[1240 Coolant Servicing]{.underline}**

For reports indicating a problem with any type of engine coolant used in
aircraft. The general instructions are not applicable to any particular
system.

**[14 -- Hardware]{.mark}**

# 1400 Miscellaneous Hardware

For miscellaneous parts that are not associated with an installed
aircraft component or system. Use this code when there is insufficient
information to file in a more specific JASC 1400 series code.

**[1410 Hoses and Tubes]{.underline}**

For reports indicating a problem with any aircraft or engine hose or
that are not associated a specific aircraft system.

# 1420 Electrical Connectors

For reports indicating a problem with any aircraft or engine electrical
connector that is not associated a specific aircraft system.

# 1430 Fasteners

For reports indicating a problem with any aircraft or engine fastener
that are not associated a specific aircraft system. Typical parts are
generic AN bolts, nuts, rivets. etc.

# 1497 Miscellaneous Wiring

For reports indicating a problem with any aircraft or engine wiring that
is not associated a specific aircraft system.

**18 ‑ Helicopter Vibration**

**[1800 Helicopter Vibration/Noise Analysis]{.underline}**

The units and components enabling operators to monitor and diagnose
vibration and noise levels in order to identify imbalance, damage, or
misalignment in helicopter components.

**[1810 Helicopter Vibration Analysis]{.underline}**

For reports of equipment necessary to monitor, measure, diagnose, and
locate sources of vibration in dynamic and structural components.

**[1820 Helicopter Noise Vibration]{.underline}**

For reports of equipment necessary to monitor, measure, diagnose and
locate sources of noise in dynamic and structural components.

1897. **[Helicopter Vibration System Wiring]{.underline}**

For reports indicating a problem with wiring used on equipment necessary
to monitor, measure, diagnose and locate sources of noise in dynamic and
structural components.

**[AIRFRAME SYSTEMS]{.underline}**

**21 ‑ Air Conditioning**

**[2100 Air Conditioning System]{.underline}**

For miscellaneous parts that cannot be associated with specific air
conditioning, pressurization, or distribution codes. Examples are lines,
hoses, etc., with no reference to the specific using system on the
incoming report. Also, for those units and components furnishing a means
of pressurizing, heating, cooling, moisture controlling, filtering, and
treating the air used to ventilate areas of the fuselage within the
pressure vessel.

**[2110 Cabin Compressor System]{.underline}**

The system and its controls supplying compressed air to the cabin. For
reported problems with the compressor unit and not the associated
system. Related entries should include the component manufacturer\'s
make, model, and the specific defective part by name and part number.
Typical parts are controls and indicating systems related to the
compressors, wiring, etc.

**[2120 Air Distribution System]{.underline}**

The system used to induct and distribute air. Does not include valves
that are a part of the temperature control, pressurization, or the
distribution fan. Typical parts are equipment rack cooling systems,
ozone converters, scoops, ducting, inlets, check valves, wiring, etc.

**[2121 Air Distribution Fan]{.underline}**

For reports pertaining to the fan/blower including associated motor
which distributes air within the confine for comfort or equipment
cooling. Typical parts are bearing, bushing, motor, etc.

**[2130 Cabin Pressure Control System]{.underline}**

For reports of miscellaneous system components or parts other than the
controller, indicator, sensor, regulator, or outflow valves. Typical
parts are amplifier, switch, electrical connector, etc.

**[2131 Cabin Pressure Controller]{.underline}**

For the reports pertaining to the controller units only and not for the
system. The defective part should be identified by the part name and
part number whenever possible.

2132. **[Cabin Pressure Indicator]{.underline}**

For reports of the cabin pressurization system, pressure indicators, and
associated system parts.

2133. **[Pressure Regulator/Outflow Valve]{.underline}**

For reports of outflow/dump valves and associated parts such as linkage,
filter, diaphragm, etc.

**[2134 Cabin Pressure Sensor]{.underline}**

The units and systems, which measure differential, pressure and transmit
a signal. Typical parts are pressure switch, transducer, etc.

**[2140 Heating System]{.underline}**

The units and systems supplying heated air to the cockpit or cabin.
Includes the heat source (heater), controlling aspects, and temperature
sensors/indicators. Typical parts are fuel pump, filter, plumbing,
circuitry, relay, heat exchanger, igniter, etc.

**[2150 Cabin Cooling System]{.underline}**

The units and systems supplying cooled air to the cockpit or cabin. Does
not include the temperature control and indicating system. Typical parts
are flow valve, relay, condenser, ram air sensor, heat exchanger,
cooling turbine, air cycle machine, etc.

**[2160 Cabin Temperature Control System]{.underline}**

The units and circuitry other than the control unit which are used for
controlling the temperature of the air in the cockpit and cabin. Typical
parts are control valves, thermal sensing devices, switches, amplifiers,
and wiring.

**[2161 Cabin Temperature Controller]{.underline}**

For reports of the parts within the cabin temperature control unit. A
typical entry would only reference the \"control unit\" if specific part
numbers are not available.

**[2162 Cabin Temperature Indicator]{.underline}**

For reports of the indicators, lamps and associated circuitry which
indicates the air temperature in the cabin.

**[2163 Cabin Temperature Sensor]{.underline}**

For reports of the sensors and associated circuitry sensing the
temperature of the air in the cabin and relays a signal to the
indicator.

**[2170 Humidity Control System]{.underline}**

For reports of system parts that control humidity. Typical parts are
bag, sock, filter, moisture separator, etc.

2197. **[Air Conditioning System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Air
Conditioning System.

**22 ‑ Auto Flight**

**[2200 Auto Flight System]{.underline}**

The units and components that furnish a means of automatically
controlling flight of the aircraft. Includes those units and components
controlling direction, heading, attitude, altitude, and speed. Use this
code when there is insufficient information to file in a more specific
JASC 2200 series code.

**[2210 Autopilot System]{.underline}**

For reports of miscellaneous parts associated with the autopilot system
used for controlling attitude and direction. Typical parts are yaw
damper, cable, switch, sensor, relay, etc. The major components such as
computer, servo, and controller are to be filed in the specific JASC
2200 series code.

**[2211 Autopilot Computer]{.underline}**

For reports pertaining to the autopilot computer only. Typical parts are
resistor, circuit board, capacitor, or power supply, etc.

**[2212 Altitude Controller]{.underline}**

The units transmitting output information signals to automatically
maintain a predetermined altitude, rate of climb, or descent. Does not
include the connecting system parts such as the sensor switch. The
controller make and model should be included.

**[2213 Flight Controller]{.underline}**

The command unit of an autopilot system. It is manually operated to
generate signals which cause the aircraft to climb, dive, or perform
coordinated turns. The controller make and model should be included.

2214. **[Autopilot Trim Indicator]{.underline}**

The instrument and associated circuitry that indicates the trim position
selected by the pilot.

**[2215 Autopilot Main Servo]{.underline}**

The unit mechanically connected to primary flight control actuating
mechanisms, which is used to mechanically reposition control surfaces in
accordance with electrical or pneumatic signals from a controller.

**[2216 Autopilot Trim Servo]{.underline}**

The units mechanically connected to flight control cables, etc., for
making minor corrections in aircraft attitude or direction.

**[2220 Speed-Attitude Correction System]{.underline}**

The system which automatically maintains safe flight conditions by
correcting for effects of speed and out-of-trim conditions by such means
as automatic trim, mach trim, or speed stability and mach feel. This
includes sensing, computing, actuating, indicating, internal monitoring,
warning devices, etc.

**[2230 Auto Throttle System]{.underline}**

The system that automatically controls the position of the throttles to
properly manage engine power during all phases of flight/attitude. This
includes engaging, sensing, computing, amplifying, controlling,
actuating and warning devices. Typical parts are amplifiers, computers,
servos, limit switches, clutches, gearboxes, warning lights, etc.

**[2250 Aerodynamic Load Alleviating]{.underline}**

The system that automatically corrects and provides for gust
loading/upset, aerodynamic augmentation, alleviation, suppression, ride
control, etc. This includes sensing, computing, actuating, indicating,
internal monitoring, warning devices, etc.

2297. **[Auto Flight System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the
Autoflight/Auto Pilot System.

**23 ‑ Communications**

**[2300 Communications System]{.underline}**

The units and components furnishing a means of communicating from one
part of the aircraft to another and between the aircraft or ground
stations, includes voice, data, continuous wave (C‑W) communicating
components, passenger announcement systems, intercom, inflight
telephones, and tape reproducers‑record player. Use this code when
insufficient information is reported to file in a more specific JASC
2300 series code. Also for reports of units or parts common to more than
one communication system.

**[2310 HF Communications System]{.underline}**

The system parts and circuitry including the receiver, transmitter, and
antenna used exclusively in the high frequency (HF) communications.

**[2311 UHF Communications System]{.underline}**

The system parts and circuitry including the receiver, transmitter, and
antenna used exclusively for ultra high frequency (UHF) communications.

**[2312 VHF Communications System]{.underline}**

The system parts and circuitry including the receiver, transmitter, and
antenna used exclusively for very high frequency (VHF) communications.

**[2320 Data Transmission Auto Call]{.underline}**

The system components and parts which presents data derived from pulse
coded transmissions. Includes \"selective calling\" (SELCAL), \"aircraft
communications addressing and reporting system\" (ACARS), teleprinter,
etc.

**[2330 Entertainment System]{.underline}**

For reports on passenger entertainment system or components such as
amplifier, cassette recorder player, control panel, speaker, video
equipment, etc.

**[2340 Interphone/Passenger Announcement (PA) System]{.underline}**

For reports on the interphone/passenger announcement (PA) system,
including the amplifier used for communication by flight and ground
personnel to communicate between areas on the aircraft.

**[2350 Audio Integrating System]{.underline}**

For reports of the system components and parts including the control
panel and amplifier which controls output of communications and
navigation receivers into flight crew headphones and speakers. Also
includes output from microphones into communications transmitters.
Typical parts are microphones, cockpit speakers, and headphones, etc.

**[2360 Static Discharge System]{.underline}**

The parts dissipating static electricity. Does not include bonding
straps on engine or airframe used to assure paths for DC current, which
are filed in JASC code 2430. Typical parts are wick, bonding strap, etc.

**[2370 Audio/Video Monitoring]{.underline}**

For reports on installations that record or monitor crew or passenger
conversation or movement for security or safety purposes. Includes voice
recorder, television, monitor, etc.

2397. **[Communications System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the
Communications Systems.

**24 ‑ Electrical Power**

**[2400 Electrical Power System]{.underline}**

The electrical units and components that generate, control, and supply
AC/DC electrical power for other systems through the secondary busses.
For reports on electric power generating system parts and circuitry
other than major components reported with insufficient information to
file in a specific JASC 2400 series code. Typical parts are circuit
breaker, relay, connector, resistor, wire bundles, switches, etc.

**[2410 Alternator-Generator Drive]{.underline}**

For reports on alternator and generator drives mounted on reciprocating
\"opposed\" type engines. Does not include alternator cases. Typical
parts are bracket, pulley, belt, link, idler pulley, bolt, drive shaft
and gears that stay with the alternator. Also for reports on constant
speed drive (CSD) unit mounted on turbine engines to drive alternating
current (AC) producing alternators at a predetermined and constant RPM.
Typical parts are shaft seal, shaft, etc.

**[2420 AC Generation System]{.underline}**

For reports of system parts other than the alternator, regulator, AC
inverter or phase adapter generating an alternating current for aircraft
which incorporate an alternating current electrical system. Used
primarily with large, turbine engine powered aircraft. Does not include
the using systems.

**[2421 AC Generator-Alternator]{.underline}**

The engine driven component that generates alternating current (AC) for
aircraft with AC electrical systems. Does not include AC alternators on
light piston‑engine power aircraft with direct current (DC) electrical
systems. Does not include single units used for both engine starting and
electric power generating. Typical parts are bearing, shaft, housing,
and integrated drive generator (IDG) which contains both AC and DC
generators.

**[2422 AC Inverter]{.underline}**

The component which converts direct current to alternating current.

**[2423 Phase Adapter]{.underline}**

The component used to change the alternating current (AC) phase of
output for specific using equipment.

**[2424 AC Regulator]{.underline}**

The component that regulates the AC voltage from the
alternator-generator to maintain a set voltage output for the using
systems (i.e., generator control unit).

2425. **[AC Indicating System]{.underline}**

The equipment indicating, voltage, current flow, and system faults in
the AC power systems.

**[2430 DC Generating System]{.underline}**

The system parts and circuitry other than the generator/alternator and
DC generation system regulator used to generate a direct current (DC);
or from an alternator, the output of which is rectified to DC. Typical
parts are relay, switch, connector, terminal, sensor, reverse current
relay, etc. Such systems are more prevalent on light single and
twin-engine aircraft.

**[2431 Battery Overheat Warning System]{.underline}**

The system parts that sense and warn/indicate of a battery
overtemperature condition. Typical parts are sensor, lamp, gauge, etc.

**[2432 Battery/Charger System]{.underline}**

The component providing a source of DC voltage and current flow
independent of rotating generators and alternators. Typical parts are
battery charger, cell, case, post, etc.

2433. **[DC Rectifier/Converter]{.underline}**

The component which converts AC current for the using systems.

**[2434 DC Generator-Alternator]{.underline}**

The engine driven component generating a direct current (DC) or a
rectified alternating current for aircraft with DC electrical systems.
For reports of alternators on light aircraft with piston engines. Does
not include mounting brackets, drive belts and pulleys external to the
unit. Typical parts are bearing, housing, coupling, fan, capacitor,
drive, brush, seal, clutch, armature and bell, shaft, field winding,
case bolt, ground stud, etc.

**[2435 Starter-Generator]{.underline}**

The single component used for both engine starting and direct current
generation on turbine engines. Typical parts are bearing, shaft, brush,
fan, retainer ring, armature, brush, housing, end bell, terminal, etc.

2436. **[DC Regulator]{.underline}**

The component that regulates direct current voltage from a generator or
alternator.

2437. **[DC Indicating System]{.underline}**

The equipment indicating voltage, current flow, and system faults in the
DC power systems.

**[2440 External Power System]{.underline}**

The electrical system within the aircraft which is used to connect
external power to the aircraft\'s electrical system. Does not include
the external power supply units. Typical parts are receptacle, switch,
indicator lamp, etc.

**[2450 AC Power Distribution System]{.underline}**

The electrical system providing for connection of AC power to using
systems. Does not include the using system. Typical parts are main and
secondary system buss, circuit breaker, limiter, jumper, load meter
switch, etc.

**[2460 DC Power Distribution System]{.underline}**

The electrical system which provides for connection of DC power to using
systems. Does not include using system. Typical parts are main and
secondary system buss, circuit breaker, buss tie breaker, limiter,
jumper, load motor switch, etc.

2497. **[Electrical Power System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Electrical
Power Systems not reportable in the Power Distribution Systems.

**25 ‑ Equipment/Furnishings**

**[2500 Cabin Equipment/Furnishings]{.underline}**

The removable items of equipment and furnishings mounted or contained in
the flight, passenger, cargo, accessory compartments, and areas
described in other JASC 2500 series codes shown below. Does not include
structure or equipment assigned specifically to other JASC codes.

**[2510 Flight Compartment Equipment]{.underline}**

The removable equipment and furnishings within the cockpit or crew
station of a general nature and not specifically covered in other JASC
2500 series codes. Typical parts are seats, shoulder harnesses, take‑up
harness reels, seat belts, sun visors, panels, map case, attach brackets
and hardware, etc.

**[2520 Passenger Compartment Equipment]{.underline}**

The removable equipment and furnishings within the cabin of a general
nature and not specifically covered in other JASC codes. Typical parts
are seats, seat belts, hat rack, coat closet, panel, including passenger
comfort items such as personal blankets, pillows, etc.

**[2530 Buffet/Galleys]{.underline}**

For reports pertaining to any of the galley equipment. Typical parts are
hot plate, coffeepot, food carts, ovens, tray, pad, relay, switch,
connector, dispenser, etc.

**[2540 Lavatories]{.underline}**

The units and associated systems and parts located in lavatories. Does
not include wash basins and other waste disposal items in JASC code
3830. Typical parts are trash containers, dispensers, etc.

**[2550 Cargo Compartments]{.underline}**

The compartments for the storage of baggage and cargo including external
mounted pods. Does not include the exterior door, hinges and latches
which are filed in JASC code 5230. Typical parts are tie downs,
restraint nets, and equipment for loading and unloading cargo (includes
external load handling equipment).

**[2551 Agricultural Spray System]{.underline}**

For reports of aerial application equipment such as hopper, tank, spray
nozzle, boom, pump, bracket, valve.

**[2560 Emergency Equipment]{.underline}**

The components, parts, and systems carried for emergency use other than
those specifically referenced in other JASC 2500 series codes. Does not
include fire extinguishes, oxygen equipment, and flashlight. Flashlights
are filed under JASC code 3350. Escape slide girt bars are filed under
this code.

**[2561 Life Jacket]{.underline}**

For reports of defective parts of life jackets used for flotation of
individual persons. Include the life jacket make and model in the report
if available.

**[2562 Emergency Locator Beacon]{.underline}**

The components transmitting an electronic signal on an emergency
frequency to assist in locating a crashed aircraft. Typical parts are
impact switch, antenna, battery pack, etc.

**[2563 Parachute]{.underline}**

For the reporting of defective parts of parachutes used for reducing
landing roll distance as well as for personnel jumping. The parachute
make and model is beneficial if available.

**[2564 Life Raft]{.underline}**

The inflatable component which provides emergency flotation for two or
more persons in event of ditching in water. Typical parts are bottle,
valve, oral pump, etc.

**[2565 Escape Slide]{.underline}**

The inflatable component which enables rapid evacuation from an aircraft
cabin to ground level during emergencies on the ground. The slide should
be identified by make and model if possible and should include location.
Typical parts are valve, bottle, inflation handle, mount brackets, door,
latch, etc.

**[2570 Accessory Compartment]{.underline}**

The compartments for the housing of various components or accessories
with insufficient information to file in a more specific JASC 2500
series code.

**[2571 Battery Box Structure]{.underline}**

The structure supporting, vents, and provides overboard draining for
aircraft batteries. Typical parts are vent cap, drain tube, insulator,
cover, etc.

**[2572 Electronic Shelf Section]{.underline}**

The shelves and attaching parts supporting the electronic equipment
within the fuselage. Does not include the equipment used for equipment
cooling such as fans, and blower motors.

2597. **[Equipment/Furnishings Wiring]{.underline}**

For reports indicating a problem with wiring specific to the
Equipment/Furnishing Systems.

**26 ‑ Fire Protection**

**[2600 Fire Protection System]{.underline}**

The fixed and portable units and components which detect and indicate
fire or smoke, and store and distribute fire extinguishing agent to all
protected areas of the aircraft. For reports of a general nature with
insufficient information to file in a more specific JASC 2600 series
code.

**[2610 Detection System]{.underline}**

The system used to sense and indicate the presence of overheat or fire
in all protected areas. Reporting the specific location of the defective
part is essential. Use this code when there is insufficient information
to file in a more specific JASC 2610 series code.

**[2611 Smoke Detection]{.underline}**

The system used to sense and indicate the presence of smoke in all
protected areas of the aircraft. Reporting the specific location of a
defective part is essential. Typical parts are detector, sensor, wiring,
relay, amplifier, test circuit, etc.

**[2612 Fire Detection]{.underline}**

The system used to sense and indicate the presence of fire in all
protected areas of the aircraft. Typical parts are detector, sensor,
wiring, relay, amplifier, test circuit, etc. Reporting the specific
location of a defective part is essential.

**[2613 Overheat Detection]{.underline}**

The system used to sense and indicate the presence of an overheat
condition in all protected areas of the aircraft. Reporting the specific
location of a defective part is essential. Typical parts are detector,
sensor, wiring, relay, amplifier, test circuit, etc.

**[2620 Extinguishing System]{.underline}**

For reports of the components and parts other than the fixed or portable
bottles used to extinguish fire. Typical parts are valve, squib, control
module, switch, tubing, etc.

**[2621 Fire Bottle, Fixed]{.underline}**

The fixed fire bottle and associated parts that store extinguishing
agent under pressure. Typical parts are bottle, cartridge, and bracket.

2622. **[Fire Bottle, Portable]{.underline}**

The portable fire extinguishes mounted within the flight compartment and
cabin.

2697. **[Fire Protection System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Fire
Protection System.

**27 ‑ Flight Controls**

**[2700 Flight Control System]{.underline}**

The units and components furnishing a means of manually controlling the
flight attitude characteristics of the aircraft. Also includes the
functioning and maintenance aspects of the flaps, spoilers and other
control surfaces, but does not include the structure, which is covered
in the Structures JASC Chapters 55 or 57. Use this code for reports of
flight control problems of a general nature involving two or more
systems, or that contain insufficient information to file in a more
specific JASC 2700 series code. An example would be a cable defect
reported without reference to the using system or an interconnect
between two systems. Does not include rotorcraft flight controls, which
are covered in the JASC Rotor Chapter 67. Typical parts are hydraulic
boost system, controls, mounting brackets, etc.

**[2701 Control Column Section]{.underline}**

The component and associated parts mounted onto the control wheel, which
transmits motion from the cockpit to connecting cables, pushrods, etc.,
to actuate the aileron and elevator, stabilator, ruddervator control
surfaces. Includes control sticks in aircraft not equipped with control
wheels. Typical parts are bearing, socket, guide, bushing, pulley
bracket, sprocket, chain, stops, etc.

**[2710 Aileron Control System]{.underline}**

The system components and parts from the control column to the aileron
surface that cause actuation (deflection). Includes manual and power
assisted systems but does not include the autopilot actuation mechanism
which is filed in JASC Chapter 22. Also includes brackets for the
support or attachment of pulleys, pushrods, and bellcranks. Does not
include control surface hinges or structure filed in JASC code 5700.
Typical parts are actuator, valve, rod end, pulley, cable, bellcrank,
turnbuckle, stops, etc.

**[2711 Aileron Tab Control System]{.underline}**

The system components and parts controlling movement and position of the
trim tab on the aileron. Includes the cockpit control. Typical parts are
jackscrew, cable, pulley, turnbuckle, stops, etc.

**[2720 Rudder Control System]{.underline}**

The system components and parts from the cockpit pedals to the rudder
surface which cause movement. Includes manual and power assisted systems
other than the actuator and autopilot actuating mechanism. Also includes
brackets for the support or attachment of pulleys, pushrods, and
bellcranks. Does not include control surface hinges or structure (filed
in JASC code 5540) or the yaw dampers (filed in JASC code 2210). Typical
parts are cable, rod end, turnbuckle, bolt, pedal, spring, torque tube,
control valve, stops, etc.

**[2721 Rudder Tab Control System]{.underline}**

The system components and parts of the rudder trim control system, from
the cockpit control to the rudder that causes deflection. Does not
include hinges or structure, which are filed in JASC code 5543, or the
yaw dampers, which are filed in JASC code 2210. Typical parts are
actuator, actuator bracket, cable, pulley, chain, rod end, bellcrank,
etc.

**[2722 Rudder Actuator]{.underline}**

The system components and parts which actuate the rudder. Typical parts
are motor, actuator, actuator bracket, jackscrew, rod-end, seals, etc.

**[2730 Elevator Control System]{.underline}**

The system components and parts including actuator from the control
column to the elevators that cause movement. Includes control-actuating
mechanism for \"ruddervators\" installed on \"V\" tail aircraft. Does
not include hinges, structure, and balance weights filed in JASC code
5520, or the autopilot servo in JASC code 2216. Typical parts are torque
tube, cable, rod end, stops, actuator, feel computer, bracket, control
valve, bob weight, etc.

**[2731 Elevator Tab Control System]{.underline}**

The system components and parts from the cockpit trim control to the
elevator, ruddervator or stabilator tab, which controls position and
movement. Includes the manual and electrical trim system parts. Does not
include the hinges or structure, which are filed in JASC code 5520, the
balance weights in JASC code 5520, or the autopilot servo in JASC code
2216. Typical parts are jackscrew, cable, actuator, sensor, motor,
chain, sprocket, indicator, etc.

**[2740 Stabilizer Control System]{.underline}**

The system components and parts from the cockpit control to the
stabilizer, except the actuator which controls position of the
horizontal stabilizer for pitch trim (usually found on high performance
turbine powered aircraft). Also for stabilator control systems on
aircraft utilizing a single horizontal tail surface for both the
stabilizer and elevator. Does not include structure in JASC code 5511.
Typical parts are cable, bellcrank, pulley, control valve, indicator,
etc.

**[2741 Stabilizer Position Indicating]{.underline}**

The system components and parts that sense, transmit, and indicate
relative position of movable stabilizers for purpose of pitch trim.
Typical parts are indicators, transmitters, etc.

**[2742 Stabilizer Actuator]{.underline}**

The component which actuates the horizontal stabilizer to infinite
angles of incidence to provide pitch trim. Includes both manual and
power assist types. Typical parts are actuator, actuator bracket,
clutch, motor, seal, etc.

**[2750 Trailing Edge Flap Control System]{.underline}**

The system components and parts, except the actuator and position
indicator which controls position and movement of wing trailing edge
flaps. Does not include the structure, carriage, fittings, tracks and
rollers which are filed in JASC code 5753; or the motor or actuator
which causes movement of the flaps and are filed in JASC code 2752.
Typical parts are control valve, switch, flow limiter, cable, torque
tube, transmission, jackscrew, bypass valve, limit switch, return
spring, buss cable, etc.

**[2751 Trailing Flap Position Indicating System]{.underline}**

The system components and parts that sense, transmit and indicate
trailing edge flap position relative to the wing surface. Typical parts
are indicator, transmitter, position module, asymmetry switch, and
comparator, etc.

**[2752 Trailing Edge Flap Actuator]{.underline}**

The component which actuates the trailing edge flaps. Typical parts are
motor, actuator, seal, jackscrew, rod end, actuator support fittings,
etc.

**[2760 Drag Control System]{.underline}**

The system components and parts other than actuator which controls
position, movement, and indicate relative position of drag device and
variable aerodynamic surfaces on the wing includes speed brake systems.
Does not include structure and hinges filed in JASC code 5755. Typical
parts are valve, hose, push rod, line, cable, indicator.

**[2761 Drag Control Actuator]{.underline}**

The components that actuates spoiler and speed brake surfaces on the
wing for speed and lift reducing purposes. Typical parts are seal, rod
end bearing, rod end, etc.

**[2770 Gust Lock Damper System]{.underline}**

The system and components protecting flight control surfaces from
movement and damage by wind gusts while the aircraft is on the ground.
Includes cockpit controlled surface locks common in light aircraft and
independent hydraulic gust damper units mounted at each flight control
surface on large jet powered aircraft. Does not include the dampening
feature of the flight control power boost systems, which are filed with
the specific control system (i.e., rudder damper). Typical parts are
damper, cylinder, seal, rod end, lock pin cable, etc.

**[2780 Leading Edge Slat Control System]{.underline}**

The system components and parts except the actuator and position
indicating system that controls the position and movement of the wing
leading edge devices used for lift augmenting. Does not include the
structure, hinges, and parts that do not cause movement of the surface
filed in JASC code 5754. Typical parts are leading edge flaps, variable
opening wing slots, priority valve, switch, cable, pulley, actuator
bracket, torque shaft, regulator, etc.

**[2781 Leading Edge Slat Position Indicating System]{.underline}**

The transmitter, indicator, warning lamps, and associated circuitry
providing relative position information of wing leading edge devices to
the flight crew.

**[2782 Leading Edge Slat Actuator]{.underline}**

The component causing movement of the wing leading edge device control
surfaces. Does not include related system or position indicating.
Typical parts are actuator, actuator bracket, seal, etc.

2797. **[Flight Control System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Flight
Control Systems.

**28 ‑ Fuel**

**[2800 Aircraft Fuel System]{.underline}**

The units and components storing and delivering fuel to the engine.
Includes the integral tank leak detection and sealing. Does not include
the structure of integral, tip fuel tanks, fuel cell backing boards
covered in the structures JASC Chapters 53 and 57, or the fuel flow rate
sensing, transmitting, or indicating systems which are covered in JASC
Chapter 73. Use this code for fuel system reports with insufficient
information to file in a more specific JASC 2800 series code. This code
is also used to report problems involving two or more aircraft fuel
system JASC codes.

**[2810 Fuel Storage]{.underline}**

The portion of the fuel system used for the storage of fuel. Does not
include defects in the wing primary structure of integral tanks. Typical
parts are removable metal tank, tip tank, header tank, bladder fuel
cell, tank interconnect lines, vent line, vent valve, drain valve,
filler cap, filler neck, check valve, vent tube, cap seal, filler
adapter, outlet fitting, screen, fueling panel, tank strap, sealant,
etc.

**[2820 Aircraft Fuel Distribution System]{.underline}**

The portion of the aircraft fuel system other than selector valves,
transfer valves, electric motor driven pumps used to distribute fuel
from the tank outlet to the powerplant quick disconnect or up to the
strainer unit. Includes the engine primer equipment, the switch that
senses failure of a system pump, and the switch that automatically
activates the boost pump. Typical parts are line, fitting, primer,
nozzle, primer pump, actuating linkage for the fuel selector/shutoff
valve, etc.

**[2821 Aircraft Fuel Filter/Strainer]{.underline}**

The component that filters unmetered fuel upstream of the engine fuel
control/carburetor. Does not include the engine fuel metered control
system filters (filed in JASC code 7300). Typical parts are screen,
housing, bowl, gasket, plunger, stand pipe, etc.

**[2822 Fuel Boost Pump]{.underline}**

The electric motor/engine driven pumps providing fuel under pressure to
the engine fuel control/carburetor for starting and emergency use.
Includes parts of the pump, associated motor, and electrical
circuitry/switch. Does not include pressure switch indicating system.
Typical parts are housing, seal, motor, brush, bearing, connector, and
fuel transfer pump, etc.

**[2823 Fuel Selector/Shut-Off Valve]{.underline}**

The component and associated controls and position indication units
which provides for specific tank selection or shutting off flow to the
engine. Typical parts are housing, rotor, handle, guard, seat, seal,
selector valve, shutoff valve, spring, etc.

**[2824 Fuel Transfer Valve]{.underline}**

The component and associated control linkage which provides for the
transfer of fuel between tanks for crossfeeding to alternate engine fuel
systems. Typical parts are, seal, housing, rotor, handle, transfer
valve, etc.

**[2830 Fuel Dump System]{.underline}**

The system and components that provide for the jettison of fuel
overboard during flight. Typical parts are valve, switch, dump chute,
etc.

**[2840 Fuel Indicating System]{.underline}**

For general reports pertaining to the aircraft fuel indicating systems,
but with no specific reference to the transmitter (tank unit) or
indicator. Does not include engine fuel pressure reports, which are
filed in JASC code 7332, or flow indication system in JASC code 7331.
Typical parts are circuit breaker, connector, pressure switch, indicator
lights, dripstick, etc.

**[2841 Fuel Quantity Indicator]{.underline}**

The indicator and low level warning system used to indicate the quantity
of fuel in the tanks. Typical parts are indicator, lamp, bulb, etc.

**[2842 Fuel Quantity Sensor]{.underline}**

The tank unit which measures and transmits a quantity level signal to
the cockpit indicator. Typical parts are transmitter, float switch,
probe, sensor, totalizer, tank unit float, gasket, etc.

2843. **[Fuel Temperature Indicator]{.underline}**

The tank unit which measures the temperature of fuel in the tanks.

**[2844 Fuel Pressure Indicator]{.underline}**

The tank unit which measures the pressure of fuel in the tanks. Typical
parts are the pressure switch and indicator lights, etc.

2897. **[Fuel System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Fuel
System.

**29 ‑ Hydraulic Power**

**[2900 Hydraulic Power System]{.underline}**

The units and components that furnish hydraulic fluid under pressure to
a common point (manifold) for re‑distribution to other defined systems.
For miscellaneous system parts other than components listed under other
specific JASC Chapter 29 codes. Also, for reports of units or parts
common to two or more components.

**[2910 Hydraulic System, Main]{.underline}**

The portion of the main system which is used to store and deliver
hydraulic fluid to the using system. Includes all hydraulic systems
other than those designated emergency or standby. Does not include the
supply valves to the using systems. Typical parts are tanks,
accumulators, valves, pumps, levers, cables, line, hose, relief, shutoff
vales, check valves, wiring, switches, external connectors, etc.

**[2911 Hydraulic Power Accumulator, Main]{.underline}**

The component that provides for pressure surges to maintain a constant
pressure in the system. Typical parts are accumulator, seal, end cap,
air valve, etc.

**[2912 Hydraulic Filter, Main]{.underline}**

The component which filters sediment from the hydraulic fluid in the
main system. Typical parts are seal, gasket, housing, element, packing,
etc.

**[2913 Hydraulic Pump (Electric/Engine), Main]{.underline}**

The component that provides hydraulic fluid pressure to using systems
but does not include the using systems. Includes power packs
incorporating integral pumps, electric motors, and solenoids used in
certain light aircraft models. Also includes pumps such as those used in
flight control systems on large aircraft. Typical parts are pump, motor,
shaft, brush, solenoid, case, power pack, seal, switch, etc.

**[2914 Hydraulic Handpump, Main]{.underline}**

The manually actuated pump for emergency system pressure. Typical parts
are handle, lever, seal, etc.

**[2915 Hydraulic Pressure Relief Valve, Main]{.underline}**

The unit which relieves system relief pressure at a preset pressure.
Typical parts are seal, spring, housing, relief valve, etc.

**[2916 Hydraulic Reservoir, Main]{.underline}**

The component which stores hydraulic fluid. Typical parts are reservoir,
filler cap, filler neck, sight gauge, seal, etc.

**[2917 Hydraulic Pressure Regulator, Main]{.underline}**

The unit that maintains a preset operating system pressure to the using
systems. Typical parts are regulator, seal, case, etc.

**[2920 Hydraulic System, Auxiliary]{.underline}**

The portion of the main system which is classified as auxiliary,
emergency, or standby, and which is used to supplement or take the place
of the main hydraulic fluid to the using system. Does not include the
supply valves to the using systems. Typical parts are tank, accumulator,
valve, pump, lever, cables, switch, plumbing, wiring, external
connectors, and miscellaneous auxiliary system parts other than those
listed in JASC codes 2921 through 2934.

**[2921 Hydraulic Accumulator, Auxiliary]{.underline}**

The component which provides for pressure surge to maintain a constant
pressure in the auxiliary system. Typical parts are accumulator, seal,
end cap and air valve, etc.

**[2922 Hydraulic Filter, Auxiliary]{.underline}**

The component which filters sediment from the hydraulic fluid in the
auxiliary system. Typical parts are seal, gasket, housing, element, and
packing, etc.

**[2923 Hydraulic Pump, Auxiliary]{.underline}**

The component which provides hydraulic fluid pressure to the using
auxiliary system. Typical parts are pump, motor, shaft, brushes, case,
seal, switches, etc.

**[2925 Hydraulic Pressure Relief, Auxiliary]{.underline}**

The unit which relieves auxiliary system pressure. Typical parts are
seal, spring, housing, relief valve, etc.

**[2926 Hydraulic Reservoir, Auxiliary]{.underline}**

The unit which stores auxiliary hydraulic fluid. Typical parts are
reservoir, filler cap, filler neck, sight gauge, etc.

**[2927 Hydraulic Pressure Regulator, Auxiliary]{.underline}**

The unit that maintains a preset operating system pressure to the using
auxiliary hydraulic system. Typical parts are regulator, seal, case,
etc.

**[2930 Hydraulic Indicating System]{.underline}**

For reports of hydraulic pressure and quantity indicating system parts
other than the indicator or sensor or for parts common to both pressure
and quantity systems.

**[2931 Hydraulic Pressure Indicator]{.underline}**

The instrument and associated low pressure warning system that registers
system pressure. Typical parts are indicator, warn lamp, bulb, etc.

**[2932 Hydraulic Pressure Sensor]{.underline}**

The components that sense system pressure and transmit a signal to the
cockpit indicator or low pressure warning lamp. Typical parts are
transmitter, pressure switch, sensor, etc.

**[2933 Hydraulic Quantity Indicator]{.underline}**

The instrument and associated low level warning system which registers
reservoir fluid quantity. Typical parts are indicator, lamp, bulb, sight
gage, etc.

**[2934 Hydraulic Quantity Sensor]{.underline}**

The components that sense the fluid level and low level warning and
transmit a signal to the quantity indicator. Typical parts are
transmitter, sensor, float switch, etc.

2997. **[Hydraulic Power System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Hydraulic
Power System.

**30 ‑ Ice and Rain Protection**

**[3000 Ice/Rain Protection System]{.underline}**

The units and components which provide a means of preventing or
disposing of formation of ice and rain on various parts of the aircraft.
Includes miscellaneous items with insufficient information to file in a
specific JASC 3000 series code. Does not include the basic windshield
panel.

**[3010 Airfoil Anti/De-ice System]{.underline}**

The system components and parts including the boots, which provide for
wing and empennage leading edge ice prevention or removal. Does not
include ducts upstream of the airfoil control/selector valves. Typical
parts are timer, valve, switch, hose, flow valve, duct, duct coupling,
thermostat, etc.

**[3020 Air Intake Anti/De-Ice System]{.underline}**

The system and components that eliminate or prevent the formation of ice
in or around air intakes such as turbine engine cowling. Does not
include engine anti‑icing reports filed in JASC code 7510. Includes the
electrically heated boot at the air intake lips.

**[3030 Pitot/Static Anti-Ice System]{.underline}**

The heating elements in the pitot-static pick up heads to eliminate or
prevent the formation of ice. Does not include defects with the pitot or
static systems. Typical parts are element, switch, wiring, etc.

**[3040 Windshield/Door Rain/Ice Removal]{.underline}**

The system and components which is used to clear, eliminate or prevent
the formation of rain, ice or

Typical parts are motor, actuator, wiper blade, hydraulic converter,
shaft, line, switch, the electrical heating portion of heated glass
panels, control units, alcohol deice system lines, tanks, pumps, valves,
etc.

**[3050 Antenna/Radome Anti-Ice/De-Ice System]{.underline}**

The system which is used to eliminate or prevent the formation of ice on
antennas and radomes.

**[3060 Propeller/Rotor Anti-Ice/De-Ice System]{.underline}**

The system components and parts which are used to eliminate or prevent
the formation of ice on propellers and rotors. Includes electrically
heated systems, and alcohol spray systems. Does not include the system
parts on the rotating portion of the propeller which are filed in JASC
code 6112 or the heating mats on the rotating portion of the rotor in
JASC code 6210 or code 6410. Typical parts are brush block, timer,
switch, relay, harness, terminal block, etc.

3070. **[Water Line Anti-Ice System]{.underline}**

The system that is used for prevention of ice in water supply and drain
lines.

**[3080 Ice Detection]{.underline}**

The system which is used to detect and indicate the formation of ice.
Typical parts are panel, detector, etc.

3097. **[Ice/Rain Protection System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Ice/Rain
Protection System.

**31 ‑ Instruments**

**[3100 Indicating/Recording System]{.underline}**

The pictorial coverage of all instrument panels and controls. Procedural
coverage of those systems, which give visual or aural warning of
conditions in systems which record, store, or compute data from
unrelated systems. Includes the system or units which integrate
indicating instruments into a central display system not related to any
specific system.

**[3110 Instrument Panel]{.underline}**

The removable cockpit instrument and control panels. Includes the
mounting hardware and shock absorbing devices.

**[3120 Independent Instruments]{.underline}**

The units which measures time, logs elapsed time of operation, or
measures acceleration/deceleration forces. Typical parts are hour meter,
pressure switch, line, etc.

**[3130 Data Recorders (Flight/Maintenance)]{.underline}**

The unit which continuously records critical flight, aircraft and
powerplant system data, such as attitude, air speed, altitude, engine
power, etc., to be used in the event of a crash. Includes the system and
parts that provide a source of power and inputs, from various sources
critical to flight, to flight data recorder. Typical parts are spool
rod, magazine, etc.

**[3140 Central Computers]{.underline}**

The systems and components used for computing data from a number of
different sources without a preponderance of functions in any one
system, for call up on a display. Includes integrated instrument systems
such as engine, airplane power and central warning indicators when
combined into a central display. Typical parts are \"digital core
avionic system\" (DCAS), \"engine indications and crew alerting system\"
(EICAS), stored checklist, emergency procedures, company regulations,
etc.

**[3150 Central Warning]{.underline}**

The panels and associated circuitry which warn of potential problems in
two or more independent or related systems. Warnings can be either
audible or visual. Typical parts are annunciator panel, relay, lamp, PC
board, diode, throttle microswitch, etc.

3160. **[Central Display]{.underline}**

The systems and components which give visual display of conditions in
unrelated systems.

**[3170 Automatic Data]{.underline}**

The systems and components used for collating and computing data from
unrelated systems and transmitting the same automatically. Includes
\"aircraft to satellite data relay\" (ASDAR) system and components.

3197. **[Instrument System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Instrument
Systems.

**32 ‑ Landing Gear**

**[3200 Landing Gear System]{.underline}**

The units and components which furnish a means of supporting and
steering the aircraft on the ground or water, and make it possible to
retract and store the landing gear in flight. Includes the functioning
and maintenance aspects of the landing gear doors, but does not include
the door structure, which is covered in JASC Chapter 52. Use this code
for general landing gear reports with insufficient information for
filing in a more specific JASC 3200 series code.

**[3201 Landing Gear/Wheel Fairing]{.underline}**

The wheel fairings and attaching parts. Typical parts are bracket,
fender, fairing, etc. The fairing location such as \"nose wheel\" should
be shown in the \"Part Location\" field.

**[3210 Main Landing Gear]{.underline}**

The miscellaneous parts of the main landing gear system which cannot be
directly associated with a specific main gear code, such as attachment,
emergency flotation or strut, axle, truck, etc. This code is not to be
used for the retraction/extension system or the doors. Landing gear
location, left or right should be referenced in the \"Part Location\"
field.

**[3211 Main Landing Gear Attach Section]{.underline}**

The parts and assemblies, which attach the main landing gear to the
airframe, structure. An entry in the \"Part Location\" field should
include a reference to \"left or right\" gear. Typical parts are
fitting, bolt, U-bolt, casting, supports, attaching hardware, etc.

**[3212 Emergency Flotation Section]{.underline}**

The helicopter inflatable floats and attaching parts which permit
emergency landings on water. The float make and model, as well as the
aircraft make and model should be included in the report. Typical parts
are float valve, hose, bracket, cylinder, etc.

**[3213 Main Landing Gear Strut/Axle/Truck]{.underline}**

The main landing gear components and parts such as struts, axles, trucks
which support the aircraft on the ground or water. Typical parts are
shock device, torque link, beam and skid/shock device on rotorcraft.

**[3220 Nose/Tail Landing Gear]{.underline}**

The miscellaneous parts of the nose or tail gear system which cannot be
directly associated with a specific nose/tail gear code such as
attachment, struts, axles, etc. This code is not to be used for
extension/retraction mechanism, steering/dampening system, or doors.

**[3221 Nose/Tail Landing Gear Attach Section]{.underline}**

The parts and assemblies that attach the nose/tail gear to the airframe
structure. Applicable to fixed or retractable type landing gear.

**[3222 Nose/Tail Landing Gear Strut/Axle]{.underline}**

The nose gear component parts such as shock struts and axles, which
support the aircraft on the ground. Torque links are included but
steering/shimmy dampening systems and units are excluded.

**[3230 Landing Gear Retraction/Extension System]{.underline}**

The miscellaneous parts of the retraction and extension systems other
than actuators, and door actuating mechanism. Location, such as nose,
right or left main should be referenced in the \"Part Location\" field
unless the defective part is common to all locations. Typical parts are
leveling cylinders, centering system, actuator brackets, bungees,
emergency extension system parts, uplocks/downlocks, uplock/downlock
actuator, drag braces, etc.

**[3231 Landing Gear Door Retract Section]{.underline}**

The nose and main landing gear door actuating system parts other than
the actuator. Excludes door structure and hinges, which are to be filed
in JASC code 5280. Typical parts are bellcrank, rod, sequence valve,
latch, lines, hoses, etc.

**[3232 Landing Gear Door Actuator]{.underline}**

The actuating units that open and close the landing gear doors. Position
on the aircraft (nose, left, or right main) should be shown in the
\"Part Location\" field.

**[3233 Landing Gear Actuator]{.underline}**

The actuating units which retract and extend the nose or main gear. This
includes electric motors, hydraulic cylinders but not self-contained
electric motor driven hydraulic pumps such as power packs, which are
filed in JASC code 2913. Specify "main gear" or "nose gear" in the
Location data field.

**[3234 Landing Gear Selector]{.underline}**

The selector valves, switches, or control levers used to direct a power
source to actuators for gear

retraction and extension.

**[3240 Landing Gear Brake System]{.underline}**

The brake system miscellaneous parts other than the brake assembly,
master cylinder, power valve and anti-skid system. Includes the pressure
source and associated system for emergency brake actuation, and brake
anti-ice system. Typical parts are line, hose, fitting, park brake
valve, gauge, etc.

**[3241 Brake Anti-Skid Section]{.underline}**

The system units and parts that automatically control brake pressure
during landing roll to prevent tire skidding. Typical parts are
transducer, control box, valve, etc.

**[3242 Brake]{.underline}**

The parts of the brake unit mounted at the wheels only. The position on
the aircraft should be shown in the \"Part Location\" field. Typical
parts are disc, cylinder, lining, seal, rotor, housing, etc.

**[3243 Master Cylinder/Brake Valve]{.underline}**

The units that provide a power source for cylinder-power brake
actuation. Does not include connecting lines to brake units, which are
filed in JASC code 3240. Typical parts are seal, piston, housing, etc.

**[3244 Tire]{.underline}**

For reports of tire defects and failures. Include the manufacturer size
and defect location in text. Identify the location of the tire in the
\"Part Location\" field (i.e., nose, right main landing gear, \"NLG\",
or \"RT MLG\").

3245. **[Tire Tube]{.underline}**

For reports of defective wheel tire tubes. Include the manufacturer
name, tube type and size.

**[3246 Wheel/Ski/Float]{.underline}**

For reports of defective wheels, skis or seaplane floats and associated
parts such as bearings, dust seals, bolts. The \"Part Name\" field
should not refer to a part of the wheel which is defective such as
\"rim\" or \"half\" that does not have separate part numbers. Such
entries should be placed in the text. Identify the location of the wheel
in the \"Part Location\" field (i.e., nose, right main landing gear,
\"NLG,\"or \"RT MLG\"). The wheel, ski or float make, model, and part
number should also be included in the report.

**[3250 Landing Gear Steering System]{.underline}**

The miscellaneous system parts other than the actuator, which provide
for aircraft directional control on the ground. Includes main gear
steering systems. Does not include wheel-braking systems. Typical parts
are, cable, rod end, collar, line, valve, accumulator, etc.

**[3251 Steering Unit]{.underline}**

The actuator which turn the wheel(s) by a power source for controlling
direction of movement on the ground. Typical parts are cylinder, seal,
etc.

**[3252 Shimmy Damper]{.underline}**

The devices mounted on steerable wheel forks to reduce shimmy. Typical
parts are seal, spring, housing, etc.

**[3260 Landing Gear Position and Warning]{.underline}**

The system parts which provide indication and warning of the landing
gear position. Includes gear safety switches which prevent inadvertent
actuation such as squat or air/ground sensor. Typical parts are relay,
switch bracket, lamp, horn, uplock switch, downlock switch, in transit
switch, etc.

**[3270 Auxiliary Gear (Tail Skid)]{.underline}**

The devices such as tail skids on tricycle gear aircraft used to
stabilize the aircraft on the ground and to prevent ground contact
damage. This code is also used for supplementary wheels on rotorcraft,
skids for ground handling but not for skids or amphibian/seaplane
floats, hull or associated retractable landing gear. This code is not
for auxiliary or emergency landing gear extension systems which are
filed in JASC code 3230.

3297. **[Landing Gear System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Landing
Gear System.

**33 ‑ Lights**

**[3300 Lighting System]{.underline}**

The units and components which provide for external and internal
illumination. Includes light fixtures, switches and wiring. Does not
include warning lights for individual systems. Use this code for reports
of a general nature or for miscellaneous external and internal lamps,
circuitry, switches, etc., with insufficient information to file in a
specific JASC 3300 series code. Warning lights are filed in the
individual JASC Chapter 33 code.

**[3310 Flight Compartment Lighting]{.underline}**

The lighting systems and equipment including panel illumination other
than inside individual instruments, master warning light systems such as
annunciator panels, and associated dimming systems located in the flight
compartment only. Typical parts are bulb, socket, switch, lamp, lens,
relay, rheostat, resistor, ballast, etc.

**[3320 Passenger Compartment Lighting]{.underline}**

The lighting systems in the passenger seating compartment, lavatories,
buffet/galley compartments and cabin carry-on baggage/coat areas.
Includes lamps for illumination of cabin, reading lamps, seat
belt/no-smoking signs and passenger call systems. Does not include
emergency lighting which is to be filed in JASC code 3350. Typical parts
are ballast, switch, transformer, lamp, etc.

**[3330 Cargo Compartment Lighting]{.underline}**

The lighting systems in the compartments used for storage of cargo,
baggage, or aircraft system components which require servicing. Does not
include electrical systems fire or smoke sensing. Typical parts are
circuit breaker, lamp, lens, switch, etc.

**[3340 Exterior Lighting]{.underline}**

The lighting systems for illumination outside the aircraft such as
landing, taxi, position, wing illumination including the rotating beacon
and strobe. Typical parts are switch, lamp, power supply, lens, circuit
breaker, flasher unit, relay, motor, wheel well lights, brackets, etc.

**[3350 Emergency Lighting]{.underline}**

The cabin, flight compartment, and exterior emergency lighting systems,
which furnish illumination in event of electrical power failure. This
includes batteries, lamps, and associated circuitry and parts for
emergency exit lighting.

3397. **[Light System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Lighting
Systems.

**34 ‑ Navigation**

**[3400 Navigation System]{.underline}**

The units and components which provide aircraft navigational
information. For reports which are of a general nature relating to the
navigation systems. Also, for reports on equipment utilized in the
flight inspection of airways systems (excluding avionics equipment
normally used for flight operations of the aircraft). Use this code for
reports with insufficient information to file in a more specific JASC
3400 series code. Typical flight inspection equipment would be
computers, recorders, nav comms, guidance equipment, etc.

3410. **[Flight Environment Data]{.underline}**

The system which senses environmental conditions and uses the data to
influence navigation.

**[3411 Pitot/Static System]{.underline}**

The system which provides a source of ram or static air for distribution
to using instruments and pressure differential units such as automatic
landing gear extender, altimeter, airspeed and rate of climb. Does not
include the using units, instruments, the anti-ice heating elements, or
the associated circuitry and switches which are filed in JASC code 3030.
Typical parts are air pick up heads, lines, fittings, drain valves,
static port, selector valve, etc.

**[3412 Outside Air Temperature Indicator/Sensor]{.underline}**

The unit mounted in the engine induction air intake to sense and
transmit temperature to the cockpit indicator. Also for the sensors and
instruments which measure and indicate the temperature of ambient air
outside the aircraft. Includes associated circuitry and related parts.
Typical parts are sensor, indicator, case, etc.

**[3413 Rate of Climb Indicator]{.underline}**

The instrument which senses and indicates the rate of climb or descent
of an aircraft. Does not include the associated static system. Includes
the instantaneous vertical speed indicator (IVSI).

**[3414 Airspeed/Mach Indicator]{.underline}**

The instrument which measures and indicates speed of the aircraft. Does
not include the Doppler indicator which are filed in JASC code 3443.

**[3415 High Speed Warning]{.underline}**

The system components and parts, including the computer which sense,
transmit and provide warning when operating air speed limits are
exceeded. Typical parts are transducer, stall warning detector, switch,
vane, horn, lamp, warning unit computer, module, etc.

**[3416 Altimeter, Barometric/Encoder]{.underline}**

Altimeters and barometric encoders used to measure and indicate
altitude. Also includes the unit which senses and alerts to a change in
a preselected altitude. Does not include the Ground Proximity Systems
and radio/radar altimeters which are filed in JASC codes 3444. Typical
parts are dial, case, pointer, spring, etc.

**[3417 Air Data Computer]{.underline}**

The computer and its integral parts which receives data from various
environmental sensing systems, computes this data, and makes it
available to the various navigation systems. Does not include external
hardware such as cables, mounting racks, remote switches, etc., which
are filed in JASC code 3410.

**[3418 Stall Warning System]{.underline}**

The system components and parts, including the computer which sense,
transmit and provide aural, visual and stick shaker warning of an
aircraft in an impending flight stall condition. Typical parts are
transducer, stall warning detector, switch, vane, horn, lamp, stick
shaker, heater element, warning unit computer, module, etc.

**[3420 Attitude and Direction Data System]{.underline}**

The system components and parts which use magnetic, gyroscopic, and
inertia forces to indicate an aircraft attitude and direction. Use this
code for reports with insufficient information to file in JASC codes
3421 through 3425. Includes such items as the inertial reference system
(IRS), etc.

**[3421 Attitude Gyro and Indicating System]{.underline}**

The gyroscopic unit which supplies attitude information to the necessary
systems; for instance, vertical reference outputs for use as roll and
pitch data to the autopilot computer. Includes the instruments operating
by the gyroscopic principle, driven by air flow or an electric motor.
Typical parts are vertical gyro and the gyro horizon.

**[3422 Directional Gyro and Indicating System]{.underline}**

The unit operating by gyroscopic principle and driven by airflow or an
electric motor, which provides heading (direction) references relative
to a preset heading in degrees of the compass. Also for the flux unit
detector which senses the earth\'s magnetic field and uses this data to
correct for gyro drift. Typical parts are gyro, rotor, bearing, etc.

**[3423 Magnetic Compass]{.underline}**

The instrument which indicates the magnetic heading of an aircraft by
self contained magnetized needles. Typical parts are compensator,
adjusting screw, gasket, float, case, etc.

**[3424 Turn and Bank/Rate of Turn Indicator]{.underline}**

The instrument actuated by gyroscopic forces and driven by air flow or
electric motor to indicate both rate of turn and angle of bank.

**[3425 Integrated Flight System]{.underline}**

The system which computes, interrogates, and continuously displays basic
attitude, position, and steering information in order to maintain a
particular course, heading, or attitude. Does not include flight
management system components, which should be assigned to JASC code
3460. Typical parts are integrated flight annunciator, integrated flight
comparator, integrated flight computer/amplifier, integrated flight
control and integrated flight indicators (i.e., horizontal situation
indicator (HSI), attitude and direction indicator (ADI), attitude
direction unit (ADU), heading and direction indicator (HDI), radio
direction indicator (RDI), course direction indicator (CDI), flight
director indicator (FDI), pictorial navigation indicator, flight command
indicator, steering computer utilized in the integrated flight
instrument systems, and other components such as cables, connectors,
etc.

**[3430 Landing and Taxi Aids]{.underline}**

The system providing guidance during approach, landing and taxiing.
Includes such items as, ILS, paravisual director, ground guidance
systems, markers, etc.

**[3431 Localizer/VOR System]{.underline}**

The electronic portion of an instrument landing system (ILS) that
indicates the centerline of the runway to the pilot. For reports on
localizer/very high frequency omni range (VOR) systems. Typical parts
are receiver, antenna, indicator, circuit breaker, switch, antenna coax,
etc.

**[3432 Glide Slope System]{.underline}**

The system which provides an instrument needle reference from an
electronic signal radiated from a ground transmitter to enable the pilot
to fly the proper glide path for landing under instrument meteorological
conditions. Typical parts are circuit breaker, switch, receiver,
antenna, indicator, etc.

**[3433 Microwave Landing System]{.underline}**

The instrumental landing system operating in the microwave spectrum
which provides lateral and vertical guidance to aircraft having
compatible avionics equipment. Typical parts are receiver, antenna,
control panel, etc.

**[3434 Marker Beacon System]{.underline}**

The system which provides an aural and visual indication of passage over
specified points on the glide path for landing under instrument
meteorological conditions. NOTE: In instances where the control panel is
an integral portion of the audio control panel, it would be filed in
JASC code 2350. Typical parts are marker beacon antenna, receivers,
visual/aural indication units, marker light, control panel, etc.

**[3435 Heads Up Display System]{.underline}**

The flight instrument system that allows the pilot of an aircraft to
watch the flight instruments while looking ahead of the aircraft.
Includes the display screen which allows information to be visually
presented to the pilot while looking through the windscreen or at the
control panel.

**[3436 Wind Shear Detection System]{.underline}**

The flight instrument system that allows the pilot to detect strong
horizontal or vertical wind shift that acts at right angles to the
direction the wind is blowing. Includes the outboard sensors,
indicators, and the warning system which notifies the pilot of the
appropriate corrective action maneuver to take.

**[3440 Independent Position Determining System]{.underline}**

The system which provides information to determine position and is
primarily independent of ground installations. Use this code for reports
of a general nature or for reports containing insufficient information
to file in a more specific code identified in JASC codes 3441 through
3446. Typical parts are star tracker, sextants/octants, etc.

**[3441 Inertial Guidance System]{.underline}**

The navigation system which relies upon gyro platforms and
accelerometers for its operation. Includes the control panel for the
inertial navigation system; the instruments which receives their signal
from the Inertial Navigation Unit (INU); and the unit containing the
inertial platform and digital computer portion of the system. Use this
JASC code for hardware components which do not have specific JASC codes
assigned to them or when a system malfunction or failure occurs but the
exact cause is not known. Typical parts are mode selector unit (MSU),
control display unit (CDU), remote display unit (RDU), etc.

**[3442 Weather Radar System]{.underline}**

The system components and parts which transmits and receives a signal
independent of ground facilities to determine the relative position of
adverse weather cells. Typical parts are transceiver, antenna, control
panel for the weather avoidance radar system, accessory synchronizers,
servo amplifier, scope, etc.

**[3443 Doppler System]{.underline}**

The airborne radar system which utilizes the Doppler effect to measure
and display ground speed, drift angle, cross track, etc.

**[3444 Ground Proximity System]{.underline}**

The system which detects and alerts flight crew to potential terrain
hazards. Includes the antenna which transmits and receives an electronic
signal for the radio altimeter equipment used for terrain-to-aircraft
distance. Also includes the component which interprets a radio signal
reflected back to a receiver to determine distance from the nearest
terrain; and the component which process the warning computer input
signals from various sources in order to determine if and when the crew
should be alerted of a terrain hazard.

**[3445 Air Collision Avoidance System]{.underline}**

The system which provides information to determine aircraft position and
is primarily independent of ground installations (i.e., traffic alert
and collision avoidance system ‑ TCAS). Use this code only if the
specific system creating the problem cannot be established. Typical
parts are collision avoidance monitoring units, etc.

**[3446 Non Radar Weather System]{.underline}**

The non radar weather system and components which sense the
electrostatic charges accumulated around a storm cell in order to \"map
out\" that cell on an indicator.

**[3450 Dependent Position Determining System]{.underline}**

The system which provides information to determine position and is
mainly dependent on ground installations. Use this code for reports of a
general nature or for those with insufficient information to file in a
more specific JASC code identified in JASC codes 3451 through 3457.

**[3451 DME/TACAN System]{.underline}**

The systems which measures time‑to‑station, ground speed, and distance
to a known transmitter location by transmitting and receiving electronic
pulse signals (i.e., distance measuring equipment ‑ DME; ultra high
frequency tactical air navigational aid ‑ TACAN). Typical parts are
antenna, control unit, transceiver, coaxial cables, etc.

**[3452 ATC Transponder System]{.underline}**

The air traffic control (ATC) system which receives coded signals from a
ground station and transmits a coded reply for altitude reporting and
identification purposes. Typical parts are transponder, antenna, control
unit, transceiver, coaxial connecting cables, etc.

**[3453 Long-Range Navigation (LORAN) System]{.underline}**

The radio navigation system and associated components and parts which
provides for long range navigation (LORAN) enroute when operating on
signals from ground based master and slave transmitting stations.
Typical parts are antenna, coupler, CPU, receiver, indicator, etc.

**[3454 Visual Omnirange (VOR) System]{.underline}**

The radio navigation system in the very high frequency (VHF) band used
for determining position relative to a ground transmitter and permits
selection of an infinite number of magnetic courses for navigation to a
transmitter (i.e., visual omnirange ‑ VOR system). Typical parts are
receiver, antenna, control panel, etc.

**[3455 Automatic Direction Finder (ADF) System]{.underline}**

The low frequency band system which receives a signal from a
non‑directional radio beacon to determine relative position from the
beacon location (i.e., automatic direction finder - ADF system). Typical
parts are antenna, control unit, receiver, coaxial cables, etc.

**[3456 Omega Navigation System]{.underline}**

The low frequency navigation system which provides for system
geographical location of the aircraft on a worldwide basis when
operating on signals from ground-based OMEGA and VHF transmitting
stations. Typical parts are antenna, control unit or receiver, coaxial
connecting cable, remote switches, connectors, etc.

**[3457 Global Positioning System]{.underline}**

The systems which are mainly dependent upon signals from ground
transmitters or orbital satellites for their operations; systems such as
VOR, ADF, DME, etc. Use this JASC code when there is insufficient
information to assign one of the specific using system codes. Typical
parts are antenna, control unit or receiver, coaxial connecting cable,
remote switches, connectors, etc.

**[3460 Flight Management Computing Hardware System]{.underline}**

The hardware systems which combines navigational data to compute or
manage the aircraft\'s geographical position or theoretical flight path.
Typical parts are course computers, flight management computers,
performance data computers, and associated control display units,
warning annunciators, etc.

**[3461 Flight Management Computing Software System]{.underline}**

The software system which combines navigational data to compute or
manage the aircraft\'s geographical position or theoretical flight path.

3497. **[Navigation System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Navigation
Systems.

**35 ‑ Oxygen**

**[3500 Oxygen System]{.underline}**

The units and components which store, regulate, and deliver breathing
oxygen to the passengers and crew. Typical parts are bottles, relief
valves, shut‑off valves, outlets, regulators, masks, walk‑around
bottles, etc.

3510. **[Crew Oxygen System]{.underline}**

The portion of the main system which furnishes oxygen to the crew.

3520. **[Passenger Oxygen System]{.underline}**

The portion of the main system which furnishes oxygen to the passengers.

**[3530 Portable Oxygen System]{.underline}**

The equipment attached to the portable bottle to regulate and dispense
breathing oxygen, including the storage bottle for the portable oxygen
system.

3597. **[Oxygen System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Oxygen
System.

**36 ‑ Pneumatic**

**[3600 Pneumatic System]{.underline}**

The units and components which deliver large volumes of compressed air
from a power source to connecting points for other systems such as air
conditioning, pressurization, deicing, etc.

**[3610 Pneumatic Distribution System]{.underline}**

Components and parts other than the regulator and shutoff valves
delivering large volumes of compressed air from a power source to the
control valves of using systems such as conditioning, pressurization.
Doesn\'t include engine and airfoil anti-icing/deicing systems. Typical
parts are regulator valve, actuator, duct, ducts valves, manifold,
clamp, flow venturi, bellows, wye duct, check valve.

**[3620 Pneumatic Indicating System]{.underline}**

The system components and parts which sense, transmit, and indicate the
temperature and pressure of air in the distribution system other than
the pressure indicator or sensor. Includes the instrument which
indicates air pressure in the pneumatic distributing systems. Does not
include the using systems.

3697. **[Pneumatic System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Pneumatic
System.

**37 ‑ Vacuum**

**[3700 Vacuum System]{.underline}**

The units and components used to generate, deliver, and regulate
negative air pressure. Use this code for general reports of the
pressure/vacuum system with insufficient information to file in a more
specific JASC 3700 series code.

**[3710 Vacuum Distribution System]{.underline}**

The system components and parts, including the pump, regulator, oil
separator or indication system, which are used to distribute low volume,
negative pressure air (suction) to systems such as gyroscopic flight
instruments, cabin rate controller, etc.; and to distribute low volume,
positive pressure air to systems such as air foil deicer boots. Does not
include the using systems. Typical parts are pump, filter, regulator,
lines, manifold, check valves, element, etc.

**[3720 Vacuum Indicating System]{.underline}**

The system components and parts including which indicates negative air
pressure in the vacuum lines. Includes the indicator and warning
systems. Typical parts are the vacuum indicator and associated lines.

3797. **[Vacuum System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Vacuum
System.

**38 ‑ Water/Waste**

**[3800 Water and Waste System]{.underline}**

The fixed units and components which store and deliver fresh water. Also
includes those fixed components which store and furnish a means of
removal of water and waste. Use this code for reports with insufficient
information to file in a more specific JASC 3800 series code. This code
is also used for reports common to two or more systems.

3810. **[Potable Water System]{.underline}**

The system which is used to store and deliver fresh drinking water.

3820. **[Wash Water System]{.underline}**

The system which is used to store and deliver wash water.

**[3830 Waste Disposal System]{.underline}**

The system and components used for the disposal of water and waste.
Includes wash basins, water closets, flush systems and collection tanks.
Typical parts are valve, flush motor, lines, timer, etc.

**[3840 Air Supply (Water Pressure System)]{.underline}**

The system which provides the pressure to distribute potable water to
the lavatories, etc. Typical parts are pump, motor, lines, etc.

3897. **[Water/Waste System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Water/Waste
System.

**45 ‑ Central Maintenance System (CMS)**

**[4500 Central Maintenance Computer]{.underline}**

The unit, components and associated systems which interface with other
airplane systems and provides a convenient way of communicating system
problems to aircraft maintenance personnel. The system contains checkout
and fault isolation procedures using a central computer to locate a
single system or component malfunction. Typical parts are computer,
storage devices, controls, display, etc.

4597. **[Central Maintenance System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Central
Maintenance System.

**49 ‑ Airborne Auxiliary Power**

**[4900 Airborne Auxiliary Power Unit (APU) System]{.underline}**

The airborne auxiliary power units (APU) installed on aircraft for the
purpose of generating and supplying a single type or combination of
auxiliary electric, hydraulic, pneumatic or other power. Does not
include generators, alternators, hydraulic pumps, etc., or their
connecting systems which supply and deliver power to their respective
aircraft systems. Use this code for reports of a general nature with
insufficient information to file in a specific JASC 4900 series code, or
for reports which involve two or more APU systems. An entry \"APU\" is
acceptable if no specific part is reported. The APU as well as aircraft
make and model should be reported if known.

**[4910 APU Cowling/Containment]{.underline}**

The system of cowling and other components used to cover the auxiliary
power unit, and contain any broken parts in the event of an external
failure.

**[4920 APU Core Engine]{.underline}**

For reports of basic engine defects such as compressor, turbine, cases
other than specific systems shown in other APU sub‑systems such as fuel,
ignition, exhaust, starting and controls. The APU make and model should
be included if available. Typical parts are turbine, bearing, seal,
impeller, blade, case, burner can, etc.

**[4930 APU Engine Fuel and Control]{.underline}**

The system and components which furnishes fuel from the aircraft tanks
to the APU fuel control and associated injector nozzles. Including the
unit which provides fuel at the proper pressure for fuel control
operation; and the unit controlling and injecting metered fuel to the
engine burner can section. Typical parts are shutoff valve, line,
fitting, etc.

**[4940 APU Start/Ignition System]{.underline}**

The system units used to start the APU engine. Including the unit which
provides a power source to the igniter during the starting cycle.
Typical parts are ignition unit, magneto, igniter, starter, etc.

**[4950 APU Bleed Air System]{.underline}**

The system and components which provide and control a source of pressure
and high volume of air for aircraft using systems such as engine
starting, cabin air conditioning prior to starting engines. Typical
parts are duct, bleed valve, clamp, seal, etc.

**[4960 APU Controls]{.underline}**

The system components which electrically and manually control operation
of the APU engine. Typical parts are relay, control box, etc.

**[4970 APU Indicating System]{.underline}**

For general reports of APU operation indicating including the
temperature indicator, tachometer generator or indicator (engine speed).
Includes the instrument and associated warning system which sense,
transmits, and indicates APU engine speed and temperatures to the flight
crew.

**[4980 APU Exhaust System]{.underline}**

The components and parts which collect and direct exhaust gasses from
the APU turbine to the aircraft exterior. Includes the movable door
fairing. Typical parts are nozzle, door, actuator, seal, clamp, and
shield.

**[4990 APU Oil System]{.underline}**

The system and components used for APU engine lubrication. Typical parts
are filter, pump, relief valve, hose, line, etc.

4997. **[APU System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the APU System.

**51 ‑ Standard Practices/Structures**

**[5100 Standard Practices/Structures]{.underline}**

The standard practices and general procedures for typical repairs
applicable to more than one chapter that are not specifically covered
under JASC Chapters 52 through 57.

**[5101 Aircraft Structures]{.underline}**

For reports of aircraft structural problems of a general nature which
affects two or more areas. Includes reports of lightning strikes which
cannot be associated with a specific JASC code.

**[5102 Balloon Reports]{.underline}**

For all balloon reports irrespective of location or component involved.
Includes all airship reports irrespective of location or component
involved. Also includes reports for water ballast. Typical parts are
stitching, seam, fabric, burner, valve, handle, valve seat, manifold and
burner fuel tank, etc.

**52 ‑ Doors**

**[5200 Doors]{.underline}**

The removable units used for entrance or exit, and for enclosing other
structure contained within the fuselage. Includes passenger and crew
doors, cargo doors, emergency exits, etc. Electrical and hydraulic
systems associated with door control are included as appropriate. Use
this code for door reports of a general nature which affect two or more
specific type of doors or are reported with insufficient information to
file in a more specific JASC 5200 series code.

**[5210 Passenger/Crew Doors]{.underline}**

For reports of cabin entrance doors. Does not include door frames,
warning systems, or cabin emergency exit doors/hatches. Typical parts
are hinges, actuators, latches, handle, seals, structure, spring, cable,
bellcrank, skin, etc.

**[5220 Emergency Exits]{.underline}**

For reports of emergency exit doors, windows and hatches. Typical parts
are pan, hinge, latch, hook, etc.

**[5230 Cargo/Baggage Doors]{.underline}**

For exterior doors used to gain access to cargo or baggage storage
areas. Does not include door frames on fuselage, door warning or
compartment interior furnishings. Typical parts are door structure,
seal, hinge, latch, latch pin, handle, skin, etc.

**[5240 Service Doors]{.underline}**

For reports pertaining to exterior doors used to gain access for
servicing aircraft systems and equipment. Does not include the fluid
service doors which are covered in JASC 5246.

**[5241 Galley Doors]{.underline}**

For reports pertaining to the galley door. Typical parts are hinges,
structure, and the latch mechanism.

**[5242 Electrical/Electronic Compartment Doors]{.underline}**

For reports pertaining to the electrical/electronic compartment doors.
Typical parts are hinges, structure, and the latch mechanism.

**[5243 Hydraulic Compartment Doors]{.underline}**

For reports pertaining to the hydraulic compartment doors. Typical parts
are hinges, structure, and the latch mechanism.

**[5244 Accessory Compartment Doors]{.underline}**

For reports pertaining to the accessory compartment doors. Typical parts
are hinges, structure, and the latch mechanism.

**[5245 Air Conditioning Doors]{.underline}**

For reports pertaining to doors used to gain access to the air
conditioning compartment system and components. Typical parts are
hinges, structure, and the latch mechanism.

**[5246 Fluid Service Doors]{.underline}**

For reports of service doors used to gain access to fluid service areas,
excluding compartment doors which are filed in JASC code 5243. Typical
parts are hinges, structure, and the latch mechanism.

**[5247 Auxiliary Power Unit (APU) Doors]{.underline}**

For reports of doors used to gain access for servicing the APU and
components. Typical parts are hinges, structure, and the latch
mechanism.

**[5248 Tail Cone Doors]{.underline}**

For reports pertaining to the tail cone door. Typical parts are hinges,
structure, and the latch mechanism.

**[5250 Fixed Inner Doors]{.underline}**

For reports of doors within the fuselage in fixed partitions. Typical
parts are structure, hinges, latches, lining but does not include doors
in movable partitions.

**[5260 Entrance Stairs]{.underline}**

For reports of cabin entrance stairs which operate in conjunction with
but are not an integral part of entrance doors. Typical parts are
structure, actuator, controls and handrails, step, cable, bungee, latch
hook, latch, bracket, bellcrank, etc.

**[5270 Door Warning System]{.underline}**

The system which is used to indicate to flight crews whether the
exterior doors are closed and properly latched. Does not include the
landing gear position warning indications which are covered in JASC code
3260. Typical parts are switch, lamp, horn, relay, etc. The suspect door
should be identified if known.

**[5280 Landing Gear Doors]{.underline}**

For reports pertaining to the structural aspects of landing gear doors
including hinges and seals on the wing, landing gear, and fuselage
mounted doors. The door position on the aircraft or landing gear (i.e.,
nose, right main outboard, etc.) should be shown in the part location
field. Does not include the operating mechanism or position indicating
or warning system which is filed in JASC codes 3231 or 3260.

5297. **[Door System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Door
Systems.

**53 ‑ Fuselage**

**[5300 Fuselage Structure (General)]{.underline}**

For reports of structural units and associated components and members
which make up the compartments for crew, passengers, equipment, cargo,
plus the structure of the envelope and gondola of airships.

**[5301 Aerial Tow Equipment]{.underline}**

For reports of defective aerial tow equipment including the attachments
on fuselage and release mechanism.

**[5302 Rotorcraft Tail Boom]{.underline}**

For reports of the structure including exterior skin and truss framework
of tail booms on rotorcraft. Includes attach fittings, etc., for tail
boom and stabilizer surfaces. Typical parts are bulkhead, bracket,
frame, frame tube, plate, etc.

**[5310 Fuselage Main, Structure]{.underline}**

For general reports of fuselage structure defects which affect two or
more related parts or are reported with insufficient information to file
in a more specific JASC 5300 series code. Use of this code should be
avoided if possible.

**[5311 Fuselage Main, Frame]{.underline}**

For reports of the main fuselage frames. The associated attach fittings
are covered in JASC code 5320.

**[5312 Fuselage Main, Bulkhead]{.underline}**

For reports of the main fuselage bulkheads and the associated attach
fittings.

5313. **[Fuselage Main, Longeron/Stringer]{.underline}**

For reports of the main fuselage longerons/stringers.

5314. **[Fuselage Main, Keel]{.underline}**

For reports of the main fuselage keel beams.

5315. **[Fuselage Main, Floor Beam]{.underline}**

For reports of the main fuselage floor beams.

**[5320 Fuselage Miscellaneous Structure]{.underline}**

For reports of miscellaneous structure on the main fuselage structure
which aids in the support of the primary structure. Includes such items
as brackets, channels, stiffeners, clips, doublers, etc. Does not
include movable partitions which are covered in JASC Chapter 25.

5321. **[Fuselage Floor Panel]{.underline}**

For reports of the interior floor panels within the main fuselage
structure.

5322. **[Fuselage Internal Mounting Structure]{.underline}**

For reports of the internal mounting structure which aids in the support
of the fuselage structure.

5323. **[Fuselage Internal Stairs]{.underline}**

For reports of the internal stairs which are part of the fuselage
structure.

5324. **[Fuselage Fixed Partitions]{.underline}**

For reports of the fixed partitions which are part of the fuselage
structure.

5330. **[Fuselage Main, Plate/Skin]{.underline}**

For reports of the exterior covering of the fuselage including access
covers.

**[5340 Fuselage Main, Attach Fittings]{.underline}**

For reports of the fittings on the fuselage used for the attachment of
doors, wings, stabilizers, landing gear, engine and rotor pylons, and
the support of equipment within the fuselage. For reports of fuselage
attach fittings that can not be specifically identified in JASC codes
5341 through 5347.

5341. **[Fuselage, Wing Attach Fittings]{.underline}**

For reports of the fittings on the fuselage used for the attachment of
the wings.

**[5342 Fuselage, Stabilizer Attach Fittings]{.underline}**

For reports of the fittings on the fuselage used for the attachment of
the stabilizers

##### 5343 Fuselage, Landing Gear Attach Fittings

For reports of the fittings on the fuselage used for the attachment of
the landing gear.

##### 5344 Fuselage, Door Hinge

For reports of the fittings on the fuselage used for the attachment of
the doors.

##### 5345 Fuselage, Equipment Attach Fittings

For reports of the fittings on the fuselage used for the attachment of
equipment.

**[5346 Fuselage, Powerplant Attach Fittings]{.underline}**

For reports of the fittings on the fuselage used for the attachment of
the powerplant. (i.e., the center engine on tri-engine airplanes).

**[5347 Fuselage, Seat/Cargo Attach Fittings]{.underline}**

For reports of the fittings on the fuselage used for the attachment of
seats and cargo restraint mechanisms.

**[5350 Aerodynamic Fairings]{.underline}**

For reports of all fixed and removable aerodynamic fairings between the
fuselage and wing/flap/empennage/pylon/nacelle attach points, tail cones
and radomes. Also includes the fairings on rotorcraft tail cones.
Typical parts are tail, radome, fairing, stiffener, skin, screw, fillet,
etc.

5397. **[Fuselage wiring??????]{.underline}**

For reports indicating a problem with wiring specific to the Fuselage
System.??????

**54 ‑ Nacelles/Pylons**

**[5400 Nacelle/Pylon Structure]{.underline}**

For reports of structural units and associated components and members
which furnish a means of mounting and housing the powerplant or rotor
assembly. Includes the structure of powerplant cowling inclusive of the
structural portion of the inlet whether or not integral with the
aircraft. Structural portions of the exhaust system are excluded where
they are not integral with the airframe. Use this code when there is
insufficient information to file in a more specific JASC 5400 series
code. NOTE: The use of this code should be avoided if possible as a
reported defect is not likely to involve both pylon and nacelle.

**[5410 Nacelle/Pylon, Main Frame]{.underline}**

For reports of the structure which houses and supports powerplants.
Includes the firewall and all structure aft on multi-engine aircraft and
firewalls on single engine aircraft. Does not include engine mounting or
cowling.

**[5411 Nacelle/Pylon, Frame/Spar/Rib]{.underline}**

For reports pertaining to the main frame, spar, or rib structure on the
nacelles or pylons.

**[5412 Nacelle/Pylon, Bulkhead/Firewall]{.underline}**

For reports pertaining to the bulkhead or firewall structure on the
nacelles or pylons which houses and supports the powerplants. Does not
include the engine mounting or cowling. Typical parts are firewall,
bulkhead, skin, stringer, beam, splice plate, etc.

5413. **[Nacelle/Pylon, Longeron/Stringer]{.underline}**

For reports pertaining to the longeron or stringer structure on the
nacelles or pylons.

5414. **[Nacelle/Pylon, Plate/Skin]{.underline}**

For reports pertaining to the plates or skins on the nacelles or pylons.

**[5415 Nacelle/Pylon, Attach Fittings]{.underline}**

For reports on the fittings on the nacelles/pylons used for the
attachment to its connecting structure, powerplant, thrust reverser, and
for the support of equipment within the

nacelle/pylon.

**[5420 Nacelle/Pylon Miscellaneous Structure]{.underline}**

For reports of miscellaneous structure on the nacelle/pylon structure
which aids in the support of the primary structure. Includes such items
as brackets, channels, stiffeners, doublers, clips, etc.

5497. **[Nacelle/Pylon System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the
Nacelle/Pylon System.

**55 ‑ Stabilizers**

**[5500 Empennage Structure]{.underline}**

The horizontal and vertical stabilizers include the structure of the
elevator and rudder. For general reports of empennage structure which
affect two or more surfaces or are reported with insufficient
information to file in a more specific JASC 5500 series code. This code
is also used for reports that pertain to flying wires.

**[5510 Horizontal Stabilizer Structure]{.underline}**

For reports pertaining to the structural aspects of horizontal
stabilizer and stabilators or canard. Includes fuselage and
boom‑to‑surface attach fittings. Does not include actuating mechanism
filed in JASC code 2742.

5511. **[Horizontal Stabilizer, Spar/Rib]{.underline}**

For specific reports of spars/ribs on the horizontal stabilizer.

**[5512 Horizontal Stabilizer, Plate/Skin]{.underline}**

For specific reports of plates/skins on the horizontal stabilizer.

**[5513 Horizontal Stabilizer, Tab Structure]{.underline}**

For reports pertaining to the structure and attachment of the tab
surface mounted on movable stabilizers and stabilators. Includes hinge
brackets and bearings/bushings. Does not include the actuating mechanism
filed in JASC code 2740. Typical parts are hinge, skin, rib, spar, etc.

**[5514 Horizontal Stabilizer Miscellaneous Structure]{.underline}**

For reports of miscellaneous structure on the horizontal stabilizer
structure which aids in the support of the primary structure. Includes
such items as brackets, channels, stiffeners, doublers, clips, etc.

**[5520 Elevator Structure]{.underline}**

For reports pertaining to the structural aspects of the movable airfoil
hinged to the horizontal stabilizer for longitudinal control. Includes
the \"ruddervator\" on V-tail aircraft and balance weights. Does not
include the stabilator structure which is filed in JASC code 5510 or the
torque tubes which are filed under the actuating mechanism in JASC code
2730. Typical parts are hinge, hinge fittings, bearing, bolt,
miscellaneous structure, etc.

5521. **[Elevator, Spar/Rib]{.underline}**

For specific reports of spars/ribs on the elevator.

5522. **[Elevator, Plate/Skin]{.underline}**

For specific reports of plates/skins on the elevator.

**[5523 Elevator, Tab Structure]{.underline}**

For reports pertaining to the structure of elevator trim surfaces hinged
to elevators and \"ruddervators.\" Includes hinge fittings and
associated bearings and bolts. Does not include actuating mechanism
filed in JASC code 2731.

**[5524 Elevator Miscellaneous Structure]{.underline}**

For reports of miscellaneous structure on the elevator structure which
aids in the support of the primary structure. Includes such items as
brackets, channels, stiffeners, doublers, clips, etc.

5530. **[Vertical Stabilizer]{.underline}**

The structural aspects of the fixed vertical surface attached to the
fuselage including the dorsal fin.

5531. **[Vertical Stabilizer, Spar/Rib]{.underline}**

For specific reports of spars or ribs on the vertical stabilizer.

**[5532 Vertical Stabilizer, Plate/Skin]{.underline}**

For specific reports of plates or skins on the vertical stabilizer.

**[5533 Ventral Structure]{.underline}**

For reports pertaining to the ventral structure and skin of the ventral
fin mounted on the lower, aft fuselage for added directional stability.
Typical parts are skin, rib, rivet, and miscellaneous parts, etc.

**[5534 Vertical Stabilizer Miscellaneous Structure]{.underline}**

For reports of miscellaneous structure on the vertical stabilizer
structure which aids in the support of the primary structure. Includes
such items as brackets, channels, stiffeners, doublers, clips, etc.

**[5540 Rudder Structure]{.underline}**

For reports pertaining to the structural aspects of the vertical airfoil
hinged to the vertical stabilizer. Does not include the actuators,
actuator mechanism or mounting which are filed in JASC code 2720.
Typical parts are hinge, hinge fittings, bearing, bolt, miscellaneous
structure, etc.

5541. **[Rudder, Spar/Rib]{.underline}**

For specific reports pertaining to spars or ribs on the rudder
structure.

5542. **[Rudder, Plate/Skin]{.underline}**

For specific reports pertaining to plates or skins on the rudder
structure.

**[5543 Rudder, Tab Structure]{.underline}**

For reports pertaining to the structure of the movable surface hinged to
the rudder surface for directional trim. Typical parts are skin, hinge
fitting, spar, rib. The actuating mechanism is filed in JASC code 2720.

**[5544 Rudder Miscellaneous Structure]{.underline}**

For reports of miscellaneous structure on the rudder structure which
aids in the support of the primary structure. Includes such items as
brackets, channels, stiffeners, doublers, clips, etc.

**[5550 Empennage Flight Control Surfaces, Attach
Fittings]{.underline}**

For miscellaneous reports of fittings on the empennage structure which
are used for the support of the flight control, but are not specifically
addressed in JASC codes 5551 through 5554.

**[5551 Horizontal Stabilizer, Attach Fittings]{.underline}**

For specific reports pertaining to the fittings on the horizontal
stabilizer which are used to support equipment within the structure.

**[5552 Elevator Tab, Attach Fittings]{.underline}**

For specific reports pertaining to the fittings on the elevator or
elevator tab which are used to support equipment within the structure.

**[5553 Vertical Stabilizer, Attach Fittings]{.underline}**

For specific reports pertaining to the fittings on the vertical
stabilizer which are used to support equipment within the structure.

**[5554 Rudder/Tab, Attach Fittings]{.underline}**

For specific reports pertaining to the fittings on the rudder or rudder
tab, which are used to support equipment within the structure.

5597. **[Stabilizer System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Stabilizer
Systems.

**56 ‑ Windows**

**[5600 Window/Windshield System]{.underline}**

For reports pertaining to the fuselage and crew compartment windows
inclusive of windshields. For reports of cockpit and cabin window or
windshield defects reported with insufficient information to file in a
specific JASC 5600 series code.

**[5610 Flight Compartment Windows]{.underline}**

For reports of all cockpit windows, cockpit overhead canopies,
observation windows, and windshield panels in the flight compartment.
Includes attachment and sliding feature of sliding windows. For cockpit
windows including the breakage of electrically heated windshield panels

regardless of cause. Does not include the heating aspects associated
circuitry of heated windshields, which is filed in JASC code 3040.
Typical parts are windshield, sliding window, seal, frame, panel, latch,
hinge, chin bubbles, etc.

**[5620 Passenger Compartment Windows]{.underline}**

For reports of cabin mounted windows in the passenger compartments.
Includes the inner and outer windows, frame attaching hardware, picture
windows. Does not include the windows in the escape hatches which are
filed in JASC code 5220.

**[5630 Door Windows]{.underline}**

For reports of windows mounted in doors. Does not include emergency exit
windows which are filed in JASC code 5220.

**[5640 Inspection Windows]{.underline}**

For windows used for examining compartments and equipment in and about
the aircraft such as door latches, and cargo bays.

5697. **[Window System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Window
System.

**57 ‑ Wings**

**[5700 Wing Structure]{.underline}**

For reports pertaining to the center wing and outer wing structural
units and associated components and members which support the aircraft
in flight. This code should be used for general reports of the primary
wing structure.

**[5710 Wing Main, Frame Structure]{.underline}**

For general reports of wing structure defects which affect two or more
related parts or are reported with insufficient information to file in a
more specific 5700 JASC code. Does not include reports pertaining to
fuel tank sealing which are filed in JASC code 2810. Excessive use of
this code should be avoided if possible.

5711. **[Wing Spar]{.underline}**

For reports pertaining to the spar in the wing structure.

5712. **[Wing, Rib/Bulkhead]{.underline}**

For reports pertaining to the ribs/bulkhead in the wing structure.

5713. **[Wing, Longeron/Stringer]{.underline}**

For reports pertaining to the longerons or stringers in the wing
structure.

5714. **[Wing, Center Box]{.underline}**

For reports pertaining to the center wing box structure.

**[5720 Wing Miscellaneous Structure]{.underline}**

For reports of the auxiliary or miscellaneous wing structure. Includes
the secondary items used for attachment. Does not include reports for
plates or skins. Typical parts are wing tip, clips, brackets, channels,
angles, stiffeners, doublers, etc.

**[5730 Wing, Plate/Skin]{.underline}**

For reports of the exterior covering of the wing including the access
covers, tip tank fillets, or fairings. Includes the leading edge and
trailing edge skin and wing mounted fuel compartment panels.

**[5740 Wing, Attach Fittings]{.underline}**

The structure on the wing used for the attachment of fuselage, nacelle
or pylon, and landing gear to the wing and for the support of equipment
within the wing. Use this code for reports of wing attachments that can
not be specifically identified in JASC codes 5741 through 5744. Does not
include flight control or landing gear actuator support fittings which
should be coded in the appropriate JASC 2700 or 3200 series code.

5741. **[Wing, Fuselage Attach Fittings]{.underline}**

The fittings on the wing used for attachment to the fuselage structure.

**[5742 Wing, Nacelle/Pylon Attach Fittings]{.underline}**

The fittings on the wing used for attachment to the nacelle/pylon.

5742. **[Wing, Landing Gear Attach Fittings]{.underline}**

The fittings on the wing used for attachment to the landing gear.

5743. **[Wing, Control Surface Attach Fittings]{.underline}**

The fittings on the wing used for attachment to the control surface.

5750. **[Wing, Control Surfaces]{.underline}**

For reports of a general nature involving the control surfaces which are
attached to the wing.

**[5751 Ailerons]{.underline}**

For reports pertaining to the structural aspects of the aileron mounted
on the trailing edge of wing. Includes hinges, balance weights. Does not
include operating mechanism which causes the surface to move which is
filed in JASC code 2710. Typical parts are skin, rib, spar, hinge,
bracket, bolt, bearing, bushing, balance weight, etc.

**[5752 Aileron Tabs]{.underline}**

For reports pertaining to the structural aspects of the surface mounted
at the trailing edge of the aileron for lateral trim. Does not include
the operating mechanism filed in JASC code 2711. Typical parts are spar,
skin, hinge, bracket, bolt, bearing, bushing.

**[5753 Trailing Edge Flaps]{.underline}**

For reports pertaining to the structural aspects of the flap surface
mounted on the trailing edge of the wing (includes fore, mid, and aft
segments). Does not include the operating mechanism such as the
actuators, brackets, hydraulic or electric motors. Typical parts are
skin, rib, spar, flap track, roller, flap carriage, bearing, bolt,
rivet, etc.

**[5754 Leading Edge Devices]{.underline}**

For reports pertaining to the structural aspects of the wing leading
edge device control surface. Includes hinge, brackets, bolts but does
not include actuators or actuator mounting brackets which are filed in
JASC code 2782. Typical parts are skin, rib, track, roller, bearing,
carriage, etc.

**[5755 Spoilers]{.underline}**

For reports pertaining to the structural aspects of the movable surface
on the upper surface of the wing for drag and lift reducing functions.
Does not include operating mechanism such as actuators, hoses, lines
which are filed in JASC codes 2760 and 2761. Typical parts are skin,
rib, gusset plate, spoiler and actuator support fittings.

5797. **[Wing System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Wing
Systems.

**[PROPELLER/ROTOR SYSTEMS]{.underline}**

**61 ‑ Propeller/Propulsors**

**[6100 Propeller System]{.underline}**

The complete mechanical or electrical propeller, governor, alternators,
pumps, motors those units and components external to or integral with
the engine used to control the propeller blade angle. Includes the
propulsor duct assemblies, aerodynamic fairing of mechanical components,
stators, vectoring systems, etc. Use this code for reports with
insufficient information to file in a more specific JASC 6100 series
code.

**[6110 Propeller Assembly]{.underline}**

For reports of propeller assembly malfunctions excluding controlling
aspects, with insufficient information to file in a more specific JASC
6100 series code, or for conditions which affect two or more parts of
the propeller such as hub and blades. Includes the propeller retaining
nut, etc.

**[6111 Propeller Blade Section]{.underline}**

For reports of blade defects other than deice boots. Includes retaining
clamps and blade pitch change actuating mechanism which rotates with the
propeller. Typical parts are blade, clamp, link, motor, counterweight,
bearing, etc.

**[6112 Propeller Deice Boot Section]{.underline}**

For reports of defective deice/anti‑ice system parts on the rotating
parts of the propeller such as blades or spinner. Does not include the
power source, controls or other non‑rotating system parts in JASC code
3060. Typical parts are boot, cuff, heat element, slip ring, etc.

**[6113 Propeller Spinner Section]{.underline}**

For reports of defective propeller spinner assemblies. Typical parts are
shell, backplate, bulkhead, rivets, screw, nut plate, brackets, etc.

**[6114 Propeller Hub Section]{.underline}**

For reports of defective hubs which house and support the rotating
blades. Includes the dome, but not the blade actuating mechanism filed
in JASC code 6111 or the attachment to engine flange in JASC code 6110.

**[6120 Propeller Controlling System]{.underline}**

For general reports of propeller speed controlling other than the
governor unit or the synchronizer. Includes the controlling systems of
propellers regardless of the propeller type. (Includes propeller
regulator, negative torque switch, and the rigging mechanism). Also
includes governor control linkage, levers, cable, and associated
brackets from the cockpit to the governor; and the feather and
unfeathering systems except the pump and accumulator. Typical parts are
cable, bellcrank, lever, rod end, pressure switch, solenoid valve, beta
switch, etc.

**[6121 Propeller Synchronizer Section]{.underline}**

The unit which controls the synchronization of propellers on
multi-engine aircraft. Typical parts are synchronizer actuator,
computer, synchrophaser, control unit, etc.

**[6122 Propeller Governor]{.underline}**

The unit which controls the propeller blade angle, but is limited to
parts in and on the governor. Does not include airframe furnished
control linkage from the cockpit which is filed in JASC code 6120. The
component make and model should be included in the report as well as the
number of the defective part. Typical parts are shaft, flyweight,
governor, spring, arm, seal, beta valve, pilot valve, head, etc.

**[6123 Propeller Feathering/Reversing]{.underline}**

The component and parts which store and deliver an energy charge for
propeller feathering and unfeathering. Includes the pump and associated
motor, switch, circuitry and plumbing which provides the force for
feathering the propeller blades for stopping the engine\'s rotation.
Does not include propeller feathering system components which are coded
in JASC code 6120, such as lever rod end, adjustment screw, solenoid,
valves, etc. Typical parts are pump, motor, switch, accumulator, air
valve, seal, etc.

**[6130 Propeller Braking]{.underline}**

The system components and parts which decrease run‑down time or stop
propeller rotation during engine power off conditions. This code is
applicable to turboprop engines.

**[6140 Propeller Indication System]{.underline}**

The system components and parts which indicates the operation or
activation of propeller systems. Typical parts are switch, lamp,
connector, harness, indicator, etc.

6197. **[Propeller/Propulsor System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the
Propeller/Propulsor Systems.

**62 ‑ Main Rotor**

**[6200 Main Rotor System]{.underline}**

For general reports of rotorcraft main rotor systems with insufficient
information to file in a more specific JASC 6200 series code. Excessive
use of this code should be avoided if possible.

**[6210 Main Rotor Blades]{.underline}**

For reports of defective blades including attachment to the rotor head
and heating mats on the blades for anti‑icing. Also includes tilt rotor
blades. Does not include the anti‑icing system which is filed in JASC
code 3060, or the rotor head which is filed in JASC code 6220. Typical
parts are blade, attach bolt, bushing, etc.

**[6220 Main Rotor Head]{.underline}**

The rotating assembly which supports the main rotor blades including
blade folding system. Includes the swashplate if it is an integral part
of the mast head assembly. Also includes the head mechanism on tilt
rotor aircraft. Typical parts are sleeve, spindle, damper, fairing. Does
not include the controlling aspects in JASC code 6710.

**[6230 Main Rotor Mast/Swashplate]{.underline}**

The vertical shaft which supports the main rotor head. Typical parts are
shaft, bearing, guide, mast, seal, swashplate, etc.

**[6240 Main Rotor Indicating System]{.underline}**

The system used to indicate the operation or activation of the main
rotor. Includes lights, gauges, switches, wiring, etc.

6297. **[Main Rotor System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Main Rotor
System.

**63 ‑ Main Rotor Drive**

**[6300 Main Rotor Drive System]{.underline}**

For general reports of main rotor drive system with insufficient
information to file in a more specific JASC sub-system code. Excessive
use of this code should be avoided if possible.

**[6310 Engine/Transmission Coupling]{.underline}**

The drive shaft between the engine and the main gearbox including the
clutch and freewheel units (if applicable), and tilt rotor interconnect
system. Typical parts are clutch, shaft, coupling, bearing, boot, seal,
sync shaft, pulley, pulley bracket, belt, etc.

**[6320 Main Rotor Gearbox]{.underline}**

The component which transmits engine power to rotary motion in the main
rotor mast. Includes mechanical power take‑off and accessory drives but
does not include the accessories such as hydraulic pumps and
alternators. Includes gearbox lubricating system. Typical parts are
gearbox, case, shaft, gear, pump, seal, sun gear, etc.

**[6321 Main Rotor Brake]{.underline}**

The system which reduces rundown time or stops rotor rotation during
engine power off conditions. Typical parts are brake, caliper, lining,
seal, check valve, etc.

**[6322 Rotorcraft Cooling Fan System]{.underline}**

The component which provides a cooling air flow to the rotorcraft piston
engine cylinders, oil coolers, etc. Typical parts are fan, shroud,
blade, impeller, duct, drive belt, stator, etc.

**[6330 Main Rotor Transmission Mount]{.underline}**

The suspension system for the transmission mounting in airframe. Typical
parts are suspension bars, isolation mount, etc.

**[6340 Rotor Drive Indicating System]{.underline}**

The indicators, sensors/transmitters and associated systems which
indicate operation or activation of rotor systems. Typical parts are
tachometer, transmitter, circuit breaker, wiring harness, light, switch,
indicator, needle, etc.

6397. **[Main Rotor Drive System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Main Rotor
Drive System.

**64 ‑ Tail Rotor**

**[6400 Tail Rotor System]{.underline}**

For general reports of the rotorcraft tail rotor system reported with
insufficient information to file in a more specific tail rotor system.
Avoid excessive use of this code if possible.

**[6410 Tail Rotor Blades]{.underline}**

For reports of defective tail rotor blades including heating mats for
anti‑icing but not the anti‑icing system in JASC code 3060. Also
includes attachment to rotor head. Typical parts are blade, attach bolt,
etc.

**[6420 Tail Rotor Head]{.underline}**

The rotating assembly which supports the tail rotor blades. Does not
include the controlling aspects which are filed in JASC code 6720.
Typical parts are trunnion, fairing, damper plate, shaft, hub, etc.

**[6440 Tail Rotor Indicating System]{.underline}**

The indicators, sensors, transmitters, and associated systems which
indicates operation or activation of the tail rotor system.

6497. **[Tail Rotor System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Tail Rotor
System.

**65 ‑ Tail Rotor Drive**

**[6500 Tail Rotor Drive System]{.underline}**

For general reports of the tail rotor drive system reported with
insufficient information to file in a more specific tail rotor drive
system. Avoid excessive use of this code if possible.

**[6510 Tail Rotor Drive Shaft]{.underline}**

The shafts, flexible couplings and bearings, etc., from the main rotor
transmission to the tail rotor assembly. Typical parts shaft, coupling,
bearing, hanger, etc.

**[6520 Tail Rotor Gearbox]{.underline}**

The gearboxes which transmit engine power to the tail rotor. Includes
intermediate gearboxes. Typical parts are case, seal, box, gear, spider
gear, gearbox cowling and fairing, etc.

**[6540 Tail Rotor Drive Indicating System]{.underline}**

The indicators, sensors, transmitters, and associated systems which
indicates operation or activation of the tail rotor drive system.

6597. **[Tail Rotor Drive System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Tail Rotor
Drive System.

**67 ‑ Rotors Flight Control**

**[6700 Rotorcraft Flight Control]{.underline}**

For general reports of rotorcraft control systems with insufficient
information to file in a more specific 6700 JASC series code; or for
reports which affect both main and tail rotor control systems. Avoid
excessive use of this code if possible.

**[6710 Main Rotor Control]{.underline}**

The system components and parts other than the servo control system
which control and indicates the attitude or the angle of attack of the
main rotor blades. Typical parts are collective pitch lever, cyclic
pitch stick, coupling and mixing units, and position indicators, etc.

**[6711 Tilt Rotor Flight Control]{.underline}**

The system components and parts of the tilt rotor control system which
controls the attitude of the aircraft by rotating the dual main rotor
assembly through a 90-degree position. The zero or vertical position
allows vertical takeoff and landing of the aircraft.

**[6720 Tail Rotor Control System]{.underline}**

The components and system parts which control movement about the
vertical axis. The directional control may be accomplished by changing
the tail rotor blade angle, or by directed compressed air (i.e., NOTAR
systems). Includes tail rotor control pedals, cables, rods, bellcranks,
associated support brackets, compressed air ducts, valves, etc.

**[6730 Rotorcraft Servo System]{.underline}**

The system which ensures distribution of mechanical or electrical power
to the rotor servo‑control system. Includes systems used to monitor and
indicate operation of the servo control system. Typical parts are
pressure relief valves, electro valves, check valves, accumulators, etc.

6797. **[Rotors Flight Control System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Rotors
Flight Control System.

**[POWERPLANT SYSTEMS]{.underline}**

**71 ‑ Powerplant**

**[7100 Powerplant System]{.underline}**

For general reports concerning the powerplant package. Avoid the use of
this code if enough information is provided to file in a more specific
JASC 7100 series code.

**[7110 Engine Cowling System]{.underline}**

The enclosure which houses engines for drag reducing and cooling.
Includes attachment, structure and access doors. Does not include engine
cylinder baffles of fire seals. Typical parts are latch, fastener,
lockpin, hook, skin, nose cap, stud, access door, hinge, hinge pin,
rivet, bracket, stiffener, etc.

**[7111 Engine Cowl Flaps]{.underline}**

The flaps mounted in engine cowling for increased cooling air flow. Also
includes the component which electrically or hydraulically actuates the
cowl flaps. Typical parts are actuator, piston, seal, hinge bracket,
skin, doubler, rod, rod end, lever, rivet, bolt, and flap, etc.

**[7112 Engine Air Baffle Section]{.underline}**

For reports of baffles which direct cooling air flow to the engine
cylinders and accessories. Does not include cylinder baffles
certificated with the engine which are filed in JASC code 8530. Typical
parts are baffle, shield, bracket, shroud, cooling ducts for starters,
and generators, etc.

**[7120 Engine Mount Section]{.underline}**

The structural framework which supports the engine on the nacelle,
firewall or pylon. Typical parts are mount, bracket, fitting, shock
mount, bolt, isolator, hanger, etc.

**[7130 Engine Fireseals]{.underline}**

The fire‑resistant partitions and seals mounted on or about the power
package to isolate areas subject to fire. Does not include firewalls
which are filed in JASC code 5412. Typical parts are shroud, bracket,
etc.

**[7160 Engine Air Intake System]{.underline}**

The portion of the powerplant system which directs airflow to the
engine. Does not include integral structure with the airframe, which
shall be included in the applicable structures JASC chapter. Typical
parts are carburetor air heat doors, alternate air doors, linkages,
controls, filter element, ducts, hose, air box, latch, seals, nose ring
cowls, scoops, compressor fan cowls, compressor fan case, buried engine
ducts, vortex generators, actuators, control handles, cables, wiring,
plumbing, doors, warning systems, position indicators, etc.

**[7170 Engine Drains]{.underline}**

The components and manifold assemblies which are used to drain off
excess fluids from the powerplant and its accessories. Includes
components that are integral parts of, or fitted to the powerplant
cowling. Typical parts are drain line, manifold, flame arrestors,
support brackets, etc.

7197. **[Powerplant System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Powerplant
System.

**72 ‑ Turbine/turboprop Engine**

**[7200 Engine (Turbine/Turboprop)]{.underline}**

The units and components which are used to induce and convert fuel-air
mixture into power, and transmit power to the propeller shaft (if any)
and accessory drives. Full identification of the powerplant is required
in all reports in JASC series codes 7200 through 8300 to increase the
usability of the reports. Use this code for general reports concerning
engine problems reported with insufficient information to file in a more
specific JASC code. Includes reports pertaining to bird strikes to
engines/cowling.

**[7210 Turbine Engine Reduction Gear]{.underline}**

For reports pertaining to reduction gears, combining gearboxes,
propeller drive shafts, and helicopter rotor shafts, which are used to
transfer power from turboprop and turboshaft engines, to the propeller
or helicopter rotor. Do not use this code for accessory devices attached
to reduction gearboxes. Typical parts are shaft, gear, bearing, case,
torque piston, transfer tube, chip detector, etc.

**[7220 Turbine Engine Air Inlet Section]{.underline}**

The engine section through which air enters the compressor section.
Typical parts are inlet case, inlet cone, inlet screen, guide vane,
inlet scroll, etc.

**[7230 Turbine Engine Compressor Section]{.underline}**

The engine section where incoming air is compressed. Includes the
operation of variable stator blades, linkage to the various valves and
sense lines. Typical parts are case, the rotating portion of the
compressor, lines, fan blades, disc, bearing, seal, mount, carbon seal,
disc tie bolts, shaft, static and variable stator blades, linkage,
actuator, etc.

**[7240 Turbine Engine Combustion Section]{.underline}**

The engine section in which fuel and air are mixed and burned. Typical
parts are case, burner can, liner, vane ring, etc.

**[7250 Turbine Section]{.underline}**

The engine section which contains the turbine disc and associated
nozzles and cases. Typical parts are case, disc, blade, nozzle, bearing,
bearing cover, power turbine, shaft, tie bolts, seals, etc.

**[7260 Turbine Engine Accessory Drive]{.underline}**

The engine mounted gearbox which provides mechanical power takeoffs to
drive accessories such as pumps, generators, chip detectors. Does not
include the remote gearboxes which are filed in JASC code 8300.

**[7261 Turbine Engine Oil System]{.underline}**

The system components and parts which provide lubricating oil pressure,
circulation and scavenging throughout the engine. Does not include
externally mounted storage tanks filed in JASC code 7910, coolers in
JASC code 7921, or connecting lines in JASC code 7920. Typical parts are
relief valve, fitting, seal, pump, screen, filter, seal, check valve,
element, etc.

**[7270 Turbine Engine Bypass Section]{.underline}**

For the non-rotating portion of engine air flow ducting for the prime
purpose of adding to engine thrust of turbo-jet engines. Does not
include the rotating components such as blades. Typical parts are duct,
skin, duct segment, etc.

7297. **[Turbine Engine System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Turbine
Engine System.

**73 ‑ Engine Fuel and Control**

**[7300 Engine Fuel and Control]{.underline}**

For general reports of turbine or reciprocating engine fuel systems with
insufficient information to file in a more specific JASC 7300 series
code.

**[7310 Engine Fuel Distribution]{.underline}**

For components and parts of the engine fuel system from the main quick
disconnect fitting or airframe fuel system strainer to the fuel control
unit. Does not include the controlling or metering aspects filed in JASC
code 7322, or the primer systems in JASC code 2820 on reciprocating
engines, or the engine fuel pumps, fuel heater, cooler, divider, or
injector nozzle (turbine and piston engines). Typical parts are supply
lines, hoses, fuel, filters on turbine engines, shutoff and solenoid
valves, etc.

**[7311 Engine Fuel/Oil Cooler]{.underline}**

The unit in which aircraft fuel flows to cool the turbine engine
lubricating oil. Does not include the connecting lines.

**[7312 Fuel Heater]{.underline}**

The unit which heats fuel flowing to the engine to prevent freezing of
entrapped water. Does not include connecting lines or the heat source.

7313. **[Fuel Injector Nozzle]{.underline}**

The unit which injects metered fuel into piston engine cylinders and
burner cans in turbine engines.

**[7314 Engine Fuel Pump]{.underline}**

For reports pertaining to engine fuel pumps. Typical parts are housing,
spring, rocker, pump, diaphragm, shaft, seal, relief valve, regulator,
coupling, etc.

**[7320 Fuel Controlling System]{.underline}**

The system components or parts other than the fuel control, amplifier,
computer, carburetor and indication systems which control and deliver
metered fuel/air to engine cylinders or turbine engine burner cans.
Typical parts are sense line, power and drain valve (P & D valve), drain
valve, carburetor inlet temperature sensor, etc.

**[7321 Fuel Control/Turbine Engines]{.underline}**

The components which electronically control metered fuel flow under
infinite temperature, altitude, and barometric pressure conditions. This
code is also to be used for turbine engines which utilize electronic and
non-electronic fuel controls. Typical parts are computer, amplifier,
sync box, CIT sensor, etc.

**[7322 Fuel Control/Reciprocating Engines]{.underline}**

The component which meters fuel/air mixture for engine combustion on
reciprocating engines. This code is to be used for fuel injection
systems, carburetor systems or other mechanical fuel metering devices
reciprocating engine. The typical parts are carburetor, fuel injector,
float, diaphragm, bellows, shaft, venturi, control arm, throttle body,
servo, discharge tube, bushing, needle, seat, accelerator pump, pin,
bearings, etc.

**[7323 Turbine Governor]{.underline}**

The component which controls the RPM of turbine engines. Typical parts
are governor, shaft, overspeed limiter, topping governor, etc.

7324. **[Fuel Divider]{.underline}**

The unit in metered fuel lines which directs fuel to individual
cylinders or burner cans.

**[7330 Engine Fuel Indicating System]{.underline}**

For reports of fuel temperature, flow rate, or pressure indicating and
warning systems other than the indicators, sensors, and transmitters.
Typical parts are line, hose, lamp, bulb, wiring harness, circuit
breaker, etc.

**[7331 Fuel Flow Indicating]{.underline}**

The instrument which indicates the flow rate of metered fuel to the
engine. Does not include the transmitter. Typical parts are indicator,
power supply, needle, dial, etc.

**[7332 Fuel Pressure Indicating]{.underline}**

The instrument which indicates the pressure of fuel at the fuel
control/carburetor as provided by the engine driven or motor driven
pumps. Includes the pressure warning indicating lamps. Typical parts are
indicator, bourdon tube, diaphragm, needle, case, etc.

**[7333 Fuel Flow Sensor]{.underline}**

The unit and associated circuitry and parts which senses and transmits
the rate of fuel flow to the cockpit indicator. Typical parts are
transmitter, sensor, fitting, connector, transducer, etc.

**[7334 Fuel Pressure Sensor]{.underline}**

The units which sense and transmit to the cockpit indicator or indicator
lamps, the pressure of fuel available at the engine fuel
control/carburetor. Includes pressure switch and circuitry for warning
indication. Typical parts are transducer, transmitter, switch, etc.

7397. **[Engine Fuel System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Engine Fuel
System.

**74 ‑ Ignition**

**[7400 Ignition System]{.underline}**

For general reports of ignition problems with insufficient information
to file in a more specific JASC 7400 series code.

**[7410 Ignition Power Supply]{.underline}**

The units and components which generate, control, furnish or distribute
an electrical current to ignite the fuel air mixture in cylinders of
reciprocating engines or in the combustion chambers or thrust augmentors
of turbine engines.

**[7411 Low Tension Coil]{.underline}**

For reports of magneto coils used on select engines such as the Pratt &
Whitney (PWA), Model R2800, to generate a low tension voltage to high
tension voltage coil mounted at each engine cylinder. Not generally used
on modern light aircraft reciprocating engines.

**[7412 Exciter]{.underline}**

The unit used with turbine engine ignition systems for starting engines.
Typical parts are exciter box, bracket, relay. The component make and
model should be included.

7413. **[Induction Vibrator]{.underline}**

The unit which provides a high tension spark to reciprocating engine
spark plugs for starting.

**[7414 Magneto/Distributor]{.underline}**

The components which generate and distribute a high voltage to spark
plugs in reciprocating engines for fuel/air combustion. Typical parts
are coil, breaker points, gear, bearing, contact finger, distributor
block, frame, impulse coupling, condenser, rotor, cam, electrode, seal,
etc.

**[7420 Ignition Harness (Distribution)]{.underline}**

The high tension insulated wiring from the magneto to the spark plug in
reciprocating engines which provides a spark for combustion. For turbine
engine, the high tension leads to burner can igniters for used for
starting. Typical parts are lead, shielding, sleeve, ignition cable,
terminal, ferrule, etc.

**[7421 Spark Plug/Igniter]{.underline}**

The part which provides the spark in the reciprocating engine cylinders
or combustion chamber of turbine engines.

**[7430 Ignition Switching]{.underline}**

The unit which provides a means of rendering the ignition power supply
(magneto) inoperative. Also used to direct electrical current to the
magneto switch. Does not include engine cranking which is covered in
JASC code 8010. Typical parts are start button (only if associated with
a ignition switching discrepancy), switch, back plate, contacts, etc.

7497. **[Ignition System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Ignition
System.

**75 ‑ Air**

**[7500 Engine Bleed Air System]{.underline}**

For general reports of turbine engine compressor bleed air systems used
to control the flow of air through the engine, cooling air systems, and
heated air for engine anti‑icing reported with insufficient information
to file in a more specific JASC 7500 series code.

**[7510 Engine Anti-Icing System]{.underline}**

The engine system components and parts used to eliminate and prevent the
formation of ice. Includes the control valve and associated actuator,
switch and circuitry which controls the flow of turbine engine
compressor bleed air to the engine anti-icing system. Anti-icing reports
pertaining to the powerplant cowling are filed in JASC code 3020.
Typical parts are control valve, actuator, motor, switch, relay, circuit
breaker, hose, manifold, coupling, fuel heat duct, fuel heat valve, etc.

**[7520 Engine Cooling System]{.underline}**

The portion of the engine compressor bleed air system which is used to
ventilate engine compartments and accessories. Does not include the
engine bleed control valve which is filed in JASC code 7532. Typical
parts are jet pumps, vortex generators, valve, actuator, and associated
parts and circuitry used to control bleed air to engine accessory
cooling systems.

**[7530 Compressor Bleed Control]{.underline}**

The system except valve and governor which controls the flow of air
through turbine engines. Typical parts are sense line, fittings, cables,
sense line filter, speed sense valve, etc.

**[7531 Compressor Bleed Governor]{.underline}**

The unit controlling relative position of the compressor bleed valve in
turbine engines for air flow control.

**[7532 Compressor Bleed Valve]{.underline}**

The component which releases air from turbine engine compressor sections
for air flow control. Typical parts are bleed valve, actuator, check
valve, etc.

**[7540 Bleed Air Indicating System]{.underline}**

The systems which indicate temperature, pressure, control positions and
warning indications of turbine engine compressor bleed air systems in
turbine engines. Typical parts are transmitter, sensor, indicator, lamp,
pressure switch, etc.

7597. **[Engine Bleed Air System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Engine
Bleed Air System.

**76 ‑ Engine Controls**

**[7600 Engine Controls]{.underline}**

The controls which govern the operation of the engine. Includes units
and components which are interconnected for emergency shutdown. For
turboprop engines, includes linkages and controls to the coordinator or
equivalent to the propeller governor, fuel control unit or other units
being controlled. For reciprocating engines, includes controls for
blowers. Does not include units or components which are specifically
included in other chapters. For general reports of engine control
problems with insufficient information to file in a more specific JASC
7600 series code.

7601. **[Engine Synchronizing]{.underline}**

The components providing for engine synchronization in multi-engine
aircraft.

**[7602 Mixture Control]{.underline}**

The control for adjusting fuel-air mixture in piston engines. Includes
linkage from the cockpit lever to the carburetor or fuel injector servo
but does not include the arm on mixture control shafts. Typical parts
are cable, rod, bellcrank, rod end, housing, clamp and cockpit control
lever/knob.

**[7603 Power Lever]{.underline}**

The system which provides for control of carburetor or fuel injectors on
piston engines; fuel controls or coordinator on turbine engines; and
propeller regulator turboprop engines. Typical parts are cable, rod, rod
end, bellcrank, bracket, clamp, actuator, shaft, shaft pin, knob, etc.

**[7620 Engine Emergency Shutdown System]{.underline}**

The system which provides for rapid, complete shutoff of combustible
fluids to the engine compartments during emergency procedures. Typical
parts are cable, actuator, switch, lever, etc.

7697. **[Engine Control System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Engine
Control System.

**77 ‑ Engine Indicating**

**[7700 Engine Indicating System]{.underline}**

For general reports of engine indicating system discrepancies with
insufficient information to file in a more specific JASC 7700 series
code. This code is also used for reports with multiple engine
indications.

**[7710 Power Indicating System]{.underline}**

For power indicating systems which directly or indirectly indicates
power or thrust (i.e., brake mean effective pressure {BMEP}, engine
pressure ratio {EPR}, RPM, etc.) but is not covered in JASC codes 7711
through 7722.

**[7711 Engine Pressure Ratio (EPR)]{.underline}**

The system which sense, measures, and indicates the engine pressure
ratio (EPR) of an turbine engine. The system measures the difference
between the compressor inlet pressure and the turbine discharge
pressure. Typical parts are sensor, transducer, transmitter, probe, etc.

**[7712 Engine BMEP/Torque Indicating]{.underline}**

The system that senses and measures brake mean effective pressure (BMEP)
or engine torque in turbo-prop and piston engines. Does not include
internal parts which are type certificated with the engine. Typical
parts are indicator, line, sensor, transmitter, pressure switch, etc.

**[7713 Manifold Pressure (MP) Indicating]{.underline}**

The reciprocating engine manifold pressure (MP) indicating system
including the indicator and sensor. Typical parts are lines, hoses and
fittings.

**[7714 Engine RPM Indicating System]{.underline}**

The system including the indicator and sensor which indicates engine
speed in revolutions per minute (RPM). Typical parts are, cable,
connector, tachometer, tachometer generator, N1 indicator.

**[7720 Engine Temperature Indicating System]{.underline}**

For general reports of the system components and parts which indicate
engine temperature with insufficient information to file in a more
specific JASC 7700 series code.

**[7721 Cylinder Head Temperature (CHT) Indicating System]{.underline}**

The instruments which indicates temperature measured at reciprocating
engine cylinder heads. Typical parts are indicator, case, dial, needle,
thermocouple lead, sensor, and connector, etc.

**[7722 Engine EGT/TIT Indicating System]{.underline}**

For reports of exhaust gas temperature (EGT) or turbine inlet
temperature (TIT) temperature sensing and indicating. Includes the EGT
indicators for both reciprocating and turbine engines; and the TIT for
turbine engines. Typical parts are wiring, turbine outlet temperature
(TOT) indicator, EGT indicator, probe, harness, terminal, connector,
indicator, sensor, transducer, transmitter, etc.

**[7730 Engine Ignition Analyzer System]{.underline}**

For general reports of reciprocating engine ignition analyzer system
problems. Typical parts are the amplifier, wiring harness, and sensor,
etc.

**[7731 Engine Ignition Analyzer]{.underline}**

The unit which interprets and indicates by oscilloscope the condition of
ignition systems on reciprocating engines.

**[7732 Engine Vibration Analyzer]{.underline}**

For general reports of the engine vibration analyzer system indicating
to the flight crew unusual engine vibration conditions. Typical parts
are connector, harness, indicator, monitor, sensor, amplifier, etc.

**[7740 Engine Integrated Instrument System]{.underline}**

The portion of the system which is an integrated concept that receives
engine operating parameters and transmits them to a central processor
for cockpit presentation. Typical parts are the display units,
transmitters, receivers, computers, etc.

7797. **[Engine Indicating System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Engine
Indication System.

**78 ‑ Engine Exhaust**

**[7800 Engine Exhaust System]{.underline}**

For general reports of engine exhaust system defects with insufficient
information to file in a more specific JASC 7800 series code.

**[7810 Engine Collector/Tailpipe/Nozzle]{.underline}**

That portion of the system which collects the exhaust gases from the
cylinders, turbines, or turbochargers and conducts them overboard.
Includes variable vanes, or nacelle tailpipes used on turboprop powered
aircraft and turbo-shaft powered rotorcraft. Typical parts are tailpipe,
cone, nozzel, clamp eyebolt, duct, ejector, etc.

**[7820 Engine Noise Suppressor]{.underline}**

For general reports of muffler system defects. The component used on
reciprocating engines to reduce engine exhaust noise. Does not include
the shroud over the muffler used to collect heated fresh air for cabin
and carburetor heat filed in JASC code 2140. Includes the clover leaf
shaped unit mounted on turbo-jet engine exhaust tailpipes for sound
suppression. Typical parts are baffle, and flame tube, etc.

**[7830 Engine Thrust Reverser]{.underline}**

The airframe furnished system and components mounted at turbo-jet engine
exhaust tailpipes, or turbofan engine variable fan reverser components
used to direct engine thrust forward for deceleration. Does not include
the engine tailpipe. Typical parts are door, flex drive, relay,
solenoid, switch, switch arm, bolt, valve, line, deploy line, rail,
cable, actuator, actuator rod, connector plug, seal, support, fitting,
shaft, link, nozzle, hose, etc.

7897. **[Engine Exhaust System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Engine
Exhaust System

**79 ‑ Engine Oil**

**[7900 Engine Oil System (Airframe Furnished)]{.underline}**

For general reports of system units external to the engine which store
and deliver engine lubricating oil to and from both turbine and
reciprocating engines with insufficient information to file in a more
specific JASC 7900 series code.

**[7910 Engine Oil Storage (Airframe Furnished)]{.underline}**

The engine oil storage tank furnished by the airframe manufacturer.
Includes attached parts such as filler caps, mount brackets, but
excludes engine manufacturer furnished tanks, quantity indication
systems, and distribution lines. Typical parts are tank, cap, seal,
bracket, drain valve, etc.

**[7920 Engine Oil Distribution (Airframe Furnished)]{.underline}**

The external oil system which distributes engine lubricating oil from
the storage tanks to and from the engine. Does not include externally
mounted units such as oil coolers, oil filters, shutoff valves. Typical
parts are line, hose, coupling, fitting, clamp, etc.

**[7921 Engine Oil Cooler]{.underline}**

The component and associated parts that cools engine lubricating oil.
Includes brackets, outlet doors, scoops, ducts and louvers, but excludes
the temperature regulator. Typical parts are cooler, duct, scoop, door,
door actuator, etc.

**[7922 Engine Oil Temperature Regulator]{.underline}**

The unit which is mounted on the airframe oil cooler or the engine for
controlling engine lubricating oil temperature. Typical parts are
thermostat, thermal valve, regulator, etc.

**[7923 Engine Oil Shutoff Valve]{.underline}**

The component and associated controls which stop the flow of lubricating
oil to the engine for emergency purposes.

**[7930 Engine Oil Indicating System]{.underline}**

For general reports of engine oil pressure, temperature and quantity and
those reports with insufficient information to file in a more specific
JASC 7900 series code. Includes oil filter bypass switch, chip detector
light, indicators, etc.

**[7931 Engine Oil Pressure]{.underline}**

The instrument or warning lamp which indicates, senses, or transmits the
pressure of engine lubricating oil available at the engine or when the
pressure is improper for the conditions. This code is also used for
discrepancies invloving oil pressure regulation. Typical parts are
transducer, pressure switch, transmitter, pressure regulator, indicator,
case, dial, needle, lamp, etc.

**[7932 Engine Oil Quantity]{.underline}**

The instrument or warning lamp which senses or indicates the quantity of
oil in supply tanks or warns of an insufficient quantity. Typical parts
are transmitter, indicator, case, lamp, etc.

**[7933 Engine Oil Temperature]{.underline}**

The instrument which senses and indicates temperature of engine oil.
Typical parts are sensor, temperature bulb, case, indicator, needle,
dial, etc.

7997. **[Engine Oil System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Engine Oil
System.

**80 ‑ Starting**

**[8000 Engine Starting System]{.underline}**

The units, components and associated systems used for starting the
engine. Includes electrical, inertia air or other starter systems. Does
not include ignition systems which are covered in JASC Chapter 74,
IGNITION.

**[8010 Engine Cranking]{.underline}**

The portion of the system which is used to perform the cranking
functions of the starting operation. Typical parts are plumbing, valve,
wiring, start switch, relay, etc.

**[8011 Engine Starter]{.underline}**

The component used for starting the engines. Includes parts which are
separated from the engine during starter removals, but does not include
parts within the engine. Does not include the starter-generator which is
filed in JASC code 2435. Typical parts are brush, bearing, shaft,
clutch, adaptor, backplate, housing, winding, terminal post, etc.

8012. **[Engine Start Valves/Controls]{.underline}**

The valves and controls used for starting engines.

8097. **[Engine Starting System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Engine
Starting System.

**81 ‑ Turbocharging**

**[8100 Exhaust Turbine System (Reciprocating)]{.underline}**

For reports of exhaust turbine systems for reciprocating engines.
Includes power recovery turbine assemblies and turbocharger units when
external to the engine.

**[8110 Power Recovery Turbine]{.underline}**

The turbines which extract energy from the exhaust gases and are coupled
to the crankshaft on reciprocating engines. Includes the power recovery
turbine unit when external to the engine. The drive shaft, coupling, and
gears are filed in JASC code 8540.

**[8120 Exhaust Turbocharger]{.underline}**

For reports of airframe or engine manufacturer furnished exhaust driven
turbocharger systems including the turbocharger unit, density controller
and waste gate valve. Does not include the tailpipe. Typical parts are
clamp, coupling, rod end, bracket, hose, scroll, bearing, impeller,
shaft, etc.

8197. **[Turbocharger System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the
Turbocharger System.

**82 ‑ Water Injection**

**[8200 Water Injection System]{.underline}**

The system components and parts which inject a water mixture into
induction system of turbine and reciprocating engines. Typical parts are
pump, switch, tank, valve, etc.

8297. **[Water Injection System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Water
Injkection System.

**83 ‑ Accessory Gearboxes**

**[8300 Accessory Gearboxes]{.underline}**

The units and components which are remotely installed and connected to
the engine by a drive shaft and which does not include those accessory
drives which are bolted to and are immediately adjacent to the engine.
The latter item should be filed in JASC code 7200. Does not include
accessory drives bolted to and adjacent to engine which are normally
filed in JASC code 7260.

8397. **[Accessory Gearbox System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the Accessory
Gearbox.

**85 ‑ Reciprocating Engine**

8500. **[Engine (Reciprocating)]{.underline}**

For general reports concerning reciprocating engine problems reported
with insufficient information to file in a more specific JASC 8500
series code. Also for reports without reference to the applicable engine
section or system. Typical reports would pertain to overtemperature,
metal contamination, vibration, etc.

**[8510 Reciprocating Engine Front Section]{.underline}**

For reports of the piston engine front cases which contain the propeller
shaft, reduction gears, and accessory drive. Typical parts are propeller
shaft, gear, bearing, bushing, case, seal, pinion gear.

**[8520 Reciprocating Engine Power Section]{.underline}**

The section which contains the crankshaft, cam shaft, tappet guides,
valve lifters, connecting rods, drive gears, etc. Does not include the
push rods which are filed in the cylinder section in JASC code 8530 or
rear case accessory drives. Typical parts are crankcase, crankshaft, cam
ring, lifter, camshaft, cylinder stud, connecting rod, bolt, through
bolt, cap, rod bolt, main bearing, rod bearing, etc.

**[8530 Reciprocating Engine Cylinder Section]{.underline}**

For reports of engine cylinders and associated parts including the
intake pipes and valve push rods/housing. Also includes the cylinder
baffles furnished by the engine manufacturer for engine cooling. Does
not include the connecting rods or cylinder flange hold down bolts/studs
which are in filed JASC code 8520. Typical parts are piston, piston pin,
exhaust valve, intake valve, valve guide, rocker arm, valve cover,
cylinder, pushrod housing, intake pipe, piston pin plug, valve spring,
rocker shaft, piston ring, oil drain lines, clamp, baffles, etc.

**[8540 Reciprocating Engine Rear Section]{.underline}**

The case or section where accessories and associated engine drives are
located. Includes the accessory pads, drives and drive seals but not the
accessories. Does not include oil pump, filter or internal lubricating
system which are filed in JASC code 8550. Typical parts are seal, gear,
drive shaft, case, bearing, spacer. The power recovery turbine (PRT)
drive shaft, coupling, and gears are also filed in this code.

**[8550 Reciprocating Engine Oil System]{.underline}**

The components and parts that provide oil pressure and distribute
lubricating oil within the engine. Includes the plumbing leading to and
from the using external systems and components which utilize engine
system oil for operation. Does not include the externally mounted oil
system storage tanks and connecting lines which are filed in JASC code
7910, or the oil cooler lines, hoses, and drain valves in JASC code
7920. Typical parts are pressure and scavenge pump, impeller, housing,
filter, air-oil separator, crankcase breather, screen, element, relief
valve, drive gear, adapter, pan, dipstick, cap, propeller governor oil
lines, etc.

**[8560 Reciprocating Engine Supercharger]{.underline}**

The components and parts of the Supercharger system. Typical parts are
case, impeller, rotors, bearings, seals, belts, pulleys or sprockets.
Does not include gears in engine rear section.

**[8570 Reciprocating Engine Liquid Cooling]{.underline}**

The components and parts that provide cooling liquid to the engine.
Includes the plumbing leading to and from the engine. Typical parts are
radiator, hoses, pump, drive belt, pulleys, bearings, seals, overflow
line, overflow tank, pressure cap, thermostat.

8597. **[Reciprocating Engine System Wiring]{.underline}**

For reports indicating a problem with wiring specific to the
Reciprocating Engine System.

![](media/image1.png){width="1.1423611111111112in"
height="1.1715277777777777in"}
![](media/image2.png){width="1.1236111111111111in"
height="1.1166666666666667in"} **Flight Standards Service**

###### JASC Code Feedback Information

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find an error, please tell us about it.

TO: Manager, Aviation Data Systems Branch AFS-620

PO Box 25082

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Recommend paragraph \_\_\_\_\_\_\_ on page \_\_\_\_\_\_\_ be changed as
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