### Thielert Aircraft Engines GmbH Platanenstraße 14 D - 09350 Lichtenstein 

# Supplement Airplane Maintenance Manual Cessna 172 & Reims F172 CENTURION 2.0 (TAE 125-02-99)
Doc. No.: AMM-20-02 (US-Version) Version: 1/1 Tel. +49 37204 696-0 Fax +49 37204 696-2912 www.centurion-engines.com support@centurion-engines.com



## CAUTION: This Supplement to the Airplane Maintenance Manual must be read completely before maintenance action, as it contains important safety information.

 

## Note: The Supplement to the Airplane Maintenance Manual is to be included at every Cessna 172 and Reims F172 with CENTURION 2.0 (TAE 125-02-99) installation



## Note: Please report any service difficulties to the Technical Support Center at ThielertAircraft Engines GmbH. See above for contact information.  

## CAUTION: The organizations and staff who carry out these maintenance action must be approved by the authority, with the exception of the “Pre-flight check“

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Rev. No: Rev. Date: Chapter: Issue: Issue Date: Page: Content: 20-AMM-00-02-US 1 02.02.2007 1 6 1 08.10.2010 

## TABLE OF CONTENTS

0.1 LIST OF REVISIONS ...

............................ .....................5 0.2 LIST OF APPLICABLE CHAPTER S .............................6

01 INTRODUCTION..........

............................ .....................1 01.1 ACCOMPANYING APPLICABLE DOCUMENTS .........

.............. ............... .........................1 01.2 IDENTIFICATION OF PARTS OF CENTURION 2.0 INSTALLATION... ..............................2 01.3 COPYRIGHT © ..........

.......................................... .........4 01.4 CONVENTIONS IN THIS MANUAL ..............................4 01.5 VALIDITY OF THIS MANUAL .....

............. .....................4 01.6 ABBREVIATIONS .......... ...............................................5 01.7 PACKING AND TRANSPORT...... .................................5 01.8 STORAGE........ .............................................................501.9 QUALIFICATIONS OF THE OPERATING AND MAINTENANCE PERSONNEL ............. .................................5 01.10 UPDATE INFORMATION SERVICE

............... ..............5 01.11 SERVICE LIFE OF THE ENGINE ............ .....................5 01.12 CONVERSION FACTORS .........

.............. .....................6

04 AIRWORTHINESS LIMITATIONS, INITIAL ISSUE .............

............................ .....................1 04.1 ENGINE LIFE LIMIT...

.......................................... .........1 04.2 MANDATORY MAINTENANCE ACTIONS ........ ...........1 04.3 LOG OF REVI SIONS TO AIRWORTHINESS LIMITATIONS ............ ...............................................................2

05 TIME LIMITS / MAINTENANCECHECKS ..... ..............1 05.10 TIME LIMITS .... .............................................................2 05.20 SCHEDULED MAINTENANCE CHECKS .....................2 05.50 UNSCHEDULED MAINTENANCE...

............... ..............5

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Chapter: Issue: Issue Date: Page: Content: 20-AMM-00-02-US 1 02.02.2007 2 6 Rev. No: Rev. Date: 1 08.10.2010 06 DIMENSIONS AND AREAS ........ .................................1 06.1 MODEL............. .............................................................1 06.2 ENGINE............ .............................................................1 06.3 PROPELLER..............

.......................................... .........2 06.4 FUEL SYSTEM ............

............................ .....................2

12 SERVICING.............

.............. ............... .........................1 12.00 GENERAL ...............

.............. ............... .........................1 12.10 REPLENISHING.........

.......................................... .........3 12.20 SCHEDULED SERVICING........... .................................6

1 STANDARD PRACTIC ES - AIRFRAME ...... ................1 1.00 GENERAL ........ .............................................................1 1.10 Standard Torque Val ues ................. ..............................1 1.20 Firewall Sealants ....

............... ............... .........................3

21 ENVIRONMENTAL SYSTEMS....... ..............................1 21.00 GENERAL ...............

.............. ............... .........................1

24 ELECTRICAL POWER ..............

.............. .....................1 24.00 GENERAL ...............

.............. ............... .........................1 24.30 DC GENERATION......

.......................................... .........2 24.50 ELECTRICAL LOAD DISTRIBU TION ............. ..............8

28 FUEL ................ .............................................................1 28.00 GENERAL ...............

.............. ............... .........................1 28.20 DISTRIBUTION .................................................... .........2 28.40 INDICATING.......... ......................................................10

31 INDICATING / RECORDING SYSTEM S ........... ...........1 31.50 CENTRAL WARNING SYSTEMS ... ..............................1 31.60 INDICATING INSTRUMENTS ....

............. .....................2

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Rev. No: Rev. Date: Chapter: Issue: Issue Date: Page: Content: 20-AMM-00-02-US 1 02.02.2007 3 6 1 08.10.2010 37 VACUUM.................

.............. ............... .........................1 37.00 GENERAL ...............

.............. ............... .........................1

61 PROPELLER ........

................ ............... .........................1 61.10 CONSTANT SPEED PROPELLER. ..............................1 61.20 CONSTANT SPEED UNIT .........

.............. .....................2

71 POWER PLANT...........

............................ .....................1 71.00 GENERAL ...............

.............. ............... .........................1 71.20 MOUNTS............... ......................................................34 71.40 ATTACH FITTINGS....

............................ ............ .........36 71.60 AIR INTAKES .........

.............. ............... .............. .........37

73 ENGINE FUEL SYSTEM ...............................................1 73.00 GENERAL ...............

.............. ............... .........................1

74 IGNITION ......... .............................................................1 74.00 GENERAL ...............

.............. ............... .........................1

75 LIQUID COOLING........

............................ .....................1 75.00 GENERAL ...............

.............. ............... .........................1

77 ENGINE INDICATION..

............................ .....................1 77.00 GENERAL ...............

.............. ............... .........................1

78 EXHAUST ........... ..........................................................1 78.00 GENERAL ...............

.............. ............... .........................1

79 OIL ................................................................................1 79.00 GENERAL ...............

.............. ............... ......................... 1 79.30 INDICATING............

.............. ............... .........................4

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Chapter: Issue: Issue Date: Page: Content: 20-AMM-00-02-US 1 02.02.2007 4 6 Rev. No: Rev. Date: 1 08.10.2010 80 STARTING .......... ..........................................................1 80.00 GENERAL ...............

.............. ............... .........................1

91 CHARTS AND WIRING DIAGRAMS..........

........... .......1 91.10 WIRING DIAGRAMS....

............................ .....................1 91.20 SPECIAL TOOLS .......

............................ ............ .........12

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Revision no.: Revision date: Chapter: Issue: Issue date: Page: Content: 20-AMM-00-02-US 1 02.02.2007 5 6 1 08.10.2010 

## 0.1 LIST OF REVISIONS
Chapter Issue/Revision Date Approved by 20-AMM-00-02-US 1/1 08.10.2010 van den Bosch 20-AMM-01-02-US 1/1 08.10.2010 van den Bosch 20-AMM-04-02-US 1/1 08.10.2010 van den Bosch 20-AMM-05-02-US 1/1 08.10.2010 van den Bosch 20-AMM-06-02-US 1/1 08.10.2010 van den Bosch 20-AMM-12-02-US 1/1 08.10.2010 van den Bosch 20-AMM-20-02-US 1/0 08.10.2010 van den Bosch 20-AMM-21-02-US 1/1 08.10.2010 van den Bosch 20-AMM-24-02-US 1/1 08.10.2010 van den Bosch 20-AMM-28-02-US 1/1 08.10.2010 van den Bosch 20-AMM-31-02-US 1/1 08.10.2010 van den Bosch 20-AMM-61-02-US 1/1 08.10.2010 van den Bosch 20-AMM-71-02-US 1/1 08.10.2010 van den Bosch 20-AMM-73-02-US 1/1 08.10.2010 van den Bosch 20-AMM-75-02-US 1/0 08.10.2010 van den Bosch 20-AMM-79-02-US 1/1 08.10.2010 van den Bosch 20-AMM-91-02-US 1/1 08.10.2010 van den Bosch

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Chapter: Issue: Issue date: Page: Content: 20-AMM-00-02-US 1 02.02.2007 6 6 Revision no.: Revision date: 1 08.10.2010 

## 0.2 LIST OF APPLICABLE CHAPTERS
Chapter Issue/Revision Date 20-AMM-00-02-US 1/1 08.10.2010 20-AMM-01-02-US 1/1 08.10.2010 20-AMM-04-02-US 1/1 08.10.2010 20-AMM-05-02-US 1/1 08.10.2010 20-AMM-06-02-US 1/1 08.10.2010 20-AMM-12-02-US 1/1 08.10.2010 20-AMM-20-02-US 1/0 08.10.2010 20-AMM-21-02-US 1/1 08.10.2010 20-AMM-24-02-US 1/1 08.10.2010 20-AMM-28-02-US 1/1 08.10.2010 20-AMM-31-02-US 1/1 08.10.2010 20-AMM-37-02-US 1/0 02.02.2007 20-AMM-61-02-US 1/1 08.10.2010 20-AMM-71-02-US 1/1 08.10.2010 20-AMM-73-02-US 1/1 08.10.2010 20-AMM-74-02-US 1/0 02.02.2007 20-AMM-75-02-US 1/0 08.10.2010 20-AMM-77-02-US 1/0 02.02.2007 20-AMM-78-02-US 1/0 02.02.2007 20-AMM-79-02-US 1/1 08.10.2010 20-AMM-80-02-US 1/0 02.02.2007 20-AMM-91-02-US 1/1 08.10.2010

Prepared by: Checked by Released by:

S.Braun M. Steinberg, MPI R. van den Bosch, MPL

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Rev. No: Rev. Date: Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 1 14 1 08.10.2010 

## 24 ELECTRICAL POWER
24.00 GENERAL
DESCRIPTION AND OPERATION For Cessna 172 with CENTURION 2.0 installation there are two electrical system variants possible:



## • 14 Volt or



## • 28 Volt The 14V system is equipped with a 90 amp alternator, a 14V starter, a 12V batteryand an excitation batteryfor the alternator. The 28V system is equipped with a 60 amp alternator, a 28V starter, a 24V battery and an excitation battery for the alternator. The alternator and the battery are operated by a separate rocker switch (BAT and ALT) located on the instrument panel. The excitation battery of the alte rnator is operatedwith the BAT switch simultaneously. A warning light (ALT WRNG LT) on the TA E-lightpanel will illuminate if the alternator fails to produ ce current, accompanied by a zero indicati on on the AED-125. The battery switch (BAT) mustbe ON before any electrical equipment will operate. In addition to the main battery and alternator, a backup battery which only supplies power to FADE C-A is part of the electrical system when installed. The FADEC backup battery is in tegrated into the electrical system without manual control. The pilot can not manually switch the FADEC backup battery on or off. Under normal operating conditions when the alternator vo ltage is greater than the battery voltage, the alternator charges the battery. In the event of an alternator fa ilure and a depleted or failed main Battery, the FADEC backup batteryis the only power source and will automatically supply power toFADEC A. This prevents the engine from stopping in the unlikely event of interrupted power supply from both alternator and main battery.

For wiring diagrams of the electrical system s of CENTURION 2.0 installations refer to Chapter 91, Section 91.10 of this supplement. S WARNING: When operating on FADEC backup battery only, the "Force B" switch must not be activated. This will shut down the engine.

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 2 14 Rev. No: Rev. Date: 1 08.10.2010 

## 24.30 DC GENERATION
PRECAUTIONS The following precautions mustbe observed when testing the electrical system.

S WARNING: Failure to observe these precau tions will result in serious damage to the electr ical equipment !

 CAUTION: Refer to wiring diagram in Chapter 91, Section 91.10 when install-ing or testing alternator.

 CAUTION: Disconnect battery, excitation battery and backup battery before connecting or disconnecting test in struments (except voltmeter), or before removing or replacing any unit or wiring. Accidental grounding or shorting at alternator with internal regulator (14V version only), alternator without internal regulator (28V version only), regulator (28V version onl y), excitation battery, ammeter or accessories, will cause seve re damage to units and/or wiring.

 CAUTION: Disconnect main battery before connecting or disconnecting the excitation or backup battery! The excitation battery wire from the alternator (14V versi on) or from the regulator (28V version) may carry electrical power even wit hout connected excitation battery in case the main battery isstill connected to the system.

 CAUTION: Grounding the alternator output terminal will da mage alternator and/or circuit and components !

 CAUTION: Reversed battery connections will damage re ctifiers, wiring, regulator and other charging system components ! Battery polarity must be checked with a voltmeter before connecting battery. The aircraft is negative ground.

 CAUTION: If booster battery or fast c harger is used, its polarity must be connected correctly to preven t damage to electrical system components !

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Rev. No: Rev. Date: Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 3 14 1 08.10.2010 

### TROUBLESHOOTING

Table 24-1a Troubleshooting CENTURION 2.0 DC Generation 

### MAINTENANCE PRACTICES
1. General These maintenance practice s provide instructions to


## • inspect the main battery


## • replace the main battery


## • replace the excitation battery


## • Functioning check of the FADEC backup battery


## • replace the FADEC backup battery (if installed per TM TAE 601-1001) 2. Inspecting the Main orFADEC backup Battery



## • Visually inspect the battery for signs of damage, leaks and corrosion. Refer to t he battery manufacturer’s specifications (refer to 01.1).



## • Check for incorrect mounting.



## • Check the terminal connections.

Trouble Check Corrective Action Check alternator wiring Replace alternator wiring Check alternator fuse Replace alternator fuse Check alternator relay Replace alternator relay Check alternator switch Replace alternator switch Check alternator funcion Replace alternator Check excitation battery Replace excitation battery Check excitation battery wiring Repair wiring FADEC backup battery capacity low Replace Battery
FADEC backup battery defect Replace Battery FADEC backup battery system wiring defective Do a test of the FADEC backup battery system wiring Refer to chapter 91 for the wiring diagrams Lack of alternator current

Alternator does not work correctly without main battery connected and switched on FADEC backup battery functioning test negative

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 4 14 Rev. No: Rev. Date: 1 08.10.2010 3. Disconnecting / Connecting the Main Battery for Maintenance
A. Disconnect the Main Battery for Maintenance (1) Remove the bottom of the extended baggage area. Refer to the ai rplane manufactuerer ́s specifications. (2) Remove the cover from the battery box. (3) Disconnect the negative cable from the main battery. See Figure 1.

Figure 1 Main BatteryMain battery 2 Negative cable 3 Battery box (4) Disconnect the positive cable from the main battery.
D. Connect the Main Battery after Maintenance (1) Connect the positive cable to the main battery.

(2) Connect the negative cabl e to the main battery. (3) Install the cover to the battery box (4) Install the bottom of the extended baggage area. Refer to the airp lane manufacturer ́s specifications. 

## 1

2 3

 CAUTION: Make sure that you connect t he cables to the correct terminals! Incorrect connection can damage the electrical and avionic systems.

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Rev. No: Rev. Date: Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 5 14 1 08.10.2010 4. Replacing the Main Battery A. Remove the Main Battery (1) Remove the bottom of the extended baggage area. Refer to the ai rplane manufacturer ́s specifications. (2) Remove the cover from the battery box. (3) Disconnect the negative cable from the main battery. See Figure 1. (4) Disconnect the positive cable from the main battery. (5) Remove the main batte ry from the airplane. B. Install the new Main Battery in the Airplane (1) Make sure that the main battery is dry and clean (2) Place the main battery into position in the battery box (3) Connect the positive cable to the main battery

(4) Connect the negative cabl e to the main battery. (5) Install the cover to the battery box (6) Install the bottom of the extended baggage area. Refer to the airp lane manufacturer ́s specifications.  CAUTION: Make sure that you connect t he cables to the correct terminals! Incorrect connection can damage the electrical and avionic systems.

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 6 14 Rev. No: Rev. Date: 1 08.10.2010 5. Replacing the Excitation Battery A. Remove the Excitation Battery (1) Disconnect the main battery. Refer to 3, Disconnect / Connect the Main Battery for Maintenance. (2) Disconnect the negative cable from the excitation battery. (3) Disconnect the positive cable from the excitation battery. (4) Remove the battery carrier (top) (5) Remove the excitation battery from the airplane.
B. Install the new Excitation Battery (1) Place the excitation battery into position in the battery carrier (bottom). (2) Install the batt ery carrier (top) (3) Connect the positive cable to the excitation battery (4) Connect the negative cable to the excitation battery (5) Connect the main battery. Refer to 3, Disconnect / Connect the Main Battery for Maintenance. (6) Do an engine ground run. Refer to OM-02-02. The Alternator Warni ng Lamp (AWL) must go OFF. 6. Functioning check of the FADEC backup battery (1) Start engine in accordance with TAE POH supplement (2) Turn off all avionics (3) FADEC Backup Battery Test a) Alternator Switch - OFF, engine must operate normally b) Battery Switch - OFF, engine must operate normally, FADEC Battery test successfull c) Battery Switch - ON d) Alternator Switch - ON (4) Ammeter - Check positive change, alternator warning light must be OFF (5) Voltmeter - Check in green range (6) Shut down engine

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Rev. No: Rev. Date: Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 7 14 1 08.10.2010 7. Replacing the Backup Battery A. Remove the Backup Battery (1) Disconnect the main battery. Refer to 3, Disconnect / Connect the Main Battery for Maintenance. (2) Disconnect the negativecable from the black backup battery terminal. (3) For 28V system only: disconnect the cable which interconnects the two batteries. (4) Disconnect the positive cable from the red backup battery terminal. (5) Remove the battery carrier (top) (6) Remove the backup batt ery from the airplane. B. Install the new Backup Battery

(1) Place the backup battery into position in the battery carrier (bottom). (2) Install the batt ery carrier (top) (3) Connect cable TF-06-B-10 to backup battery positive connection (red terminal). (4) For 28V systems only: interconnect the 2 backup batteries with each other using cable TF-06-C-10 (5) Connect cable TF-06-N-10 to backup battery negative connection (black terminal) (6) Check if plug-in connection on backup battery is fitted tightly! (7) Connect the main battery. Refer to 3, Disconnect / Connect the Main Battery for Maintenance. (8) Perform functioning check of the FADEC backup battery.  Note: Charge the battery i.a.w. the manufacture rs instruction before installation into the aircraft.

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 8 14 Rev. No: Rev. Date: 1 08.10.2010 

## 24.50 ELECTRICAL LOAD DISTRIBUTION
TROUBLESHOOTING For Troubleshooting in case of malfunction refer to refer to Chapter 71


### MAINTENANCE PRACTICES
1. General These maintenance practice s provide instructions to inspect



## • all relays



## • all 14V / 28V converters, if installed They also provide instructionsto accomplish a function test of the following parts:



## • all relays



## • all switches



## • all circuit breakers



## • all 14V / 28V converters, if installed 2. Inspecting the relays This is a visual inspection. Inspect whether the connections of the relays are firmly attac hed. In addition, the relays have to be checked for signs of corrosion. The following relays have to be checked:



## • Battery Relay (located in the Junction-Box on the firewall)



## • Alternator Relay (located in the Junction-Box on the firewall)



## • Glow Relay (located in the Junction-Box on the firewall)



## • Main Bus Relay, only C172 F, G, H, I, K, L, M, N, P (located on the LH of th e airframe, underneath the Panel LH) 3. Inspecting the 14V / 28V C onverters, if installed This is ab visual inspection. Inspect whether the connections of the 14V / 28Vare firmly attached. In addition, the 14V / 28V convertershas to be checked for signs of corrosion.

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Rev. No: Rev. Date: Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 9 14 1 08.10.2010 4. Accomplishing a functi on test of all relays The following relays must be tested:



## • Battery Relay (located in the Junction-Box on the firewall)



## • Alternator Relay (located in the Junction-Box on the firewall)



## • Glow Relay (located in the Junction-Box on the firewall)



## • Main Bus Relay, only C172 F, G, H, I, K, L, M, N, P (located on the LH of th e airframe, underneath the Panel LH) A. Accomplish the function test of the Battery Relay (1) Battery Switch “ON“ (2) AED, CED illuminate (without data) (3) Fuel Pump functional (switch Fuel Pump) (4) => Battery Relay OK (5) Battery Switch “OFF“ B. Accomplish the function test of the Alternator Relay (1) Battery Switch “ON“ (2) Alternator Switch “ON“ (3) A voltmeter must indi cate the same voltage at the Alternator (Terminal Wi re 3) as at the battery (4) Alternator Switch “OFF“: No voltage at the Alternator (Ter minal Wire 3) (5) => Alternator Relay OK (6) Battery Switch “OFF“ C. Accomplish the function test of the Glow Relay (1) Battery Switch “ON“ (2) Engine Master “ON“ (3) Voltage at the Glow Plugs, Glow Lamp “ON“ (approx. 5sec.) (4) => Glow Relay OK (5) Engine Master “OFF“ (6) Battery Switch “BATT “OFF“

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 10 14 Rev. No: Rev. Date: 1 08.10.2010 D. Accomplish the function test of the Main Bus Relay (1) Battery Switch “ON“ (2) Main Bus Switch “ON“ (3) Avionics, Lights etc. functional (4) => Main Bus Relay OK (5) Main Bus Switch “OFF“ (6) Battery Switch “OFF“ 5. Accomplishing a function test of all switches/knobs The following switches must be tested:



## • Main Bus Switch



## • Engine Master Switch



## • Force B Switch



## • FADEC Test Knob



## • AED/CED Test Knob



## • Alternator switch

A. Inspect all switches/knobs (1) Visual inspect all swit ches/knobs on signs of corrosion (2) Visual inspect whether all connections of the switches/knobs are firmly attached B. Accomplish the function test of the Main Bus Switch (1) Battery Switch “ON“ (2) Main Bus Switch “ON“ (3) Main Bus Relay on, Avionics, Lights etc. functional (4) => Main Bus Switch OK (5) Main Bus Switch “OFF“ (6) Battery Switch “OFF“ S WARNING: Only run the engine on the ground with t he propeller running, even for testing purposes, in a safe and clear area and ensure that prop area is clear !

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Rev. No: Rev. Date: Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 11 14 1 08.10.2010 C. Accomplish the function test of the Engine Master Switch (1) Battery Switch “ON“ (2) Engine Master “ON“ =>AED/CED indicate data (3) Start engine

(4) Load Selector “IDLE“ (5) Accomplish FADEC Test procedure => OK (6) Battery Switch “OFF“ => Engine must run without Battery (7) Switch FADEC A to FADEC B using the Force B switch => Engine running OK (8) => Engine Master Switch OK (9) Engine Master “OFF“ (10) Battery Switch “OFF“ D. Accomplish the function test of the Force B Switch (1) Battery Switch “ON“ (2) Engine Master “ON“ (3) Start engine

(4) Load Selector “IDLE“ (5) FADEC toggles from FADEC A to FADEC B using the Force B switch (6) => Force B switch OK (7) Engine Master “OFF“ (8) Battery Switch “OFF“ S WARNING: Only run the engine on the ground with t he propeller running, even for testing purposes, in a safe and clear area and ensure that prop area is clear !

S WARNING: Only run the engine on the ground with t he propeller running, even for testing purposes, in a safe and clear area and ensure that prop area is clear !

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 12 14 Rev. No: Rev. Date: 1 08.10.2010 E. Accomplish the function test of the FADEC Test Knob (1) Battery Switch “ON“ (2) Engine Master “ON“ (3) Start engine

(4) Load Selector “IDLE“ (5) Push FADEC test knob => Test procedure OK (6) => FADEC Test knob OK (7) Engine Master “OFF“ (8) Battery Switch “OFF“ F. Accomplish the function test of the AED/CED Test Knob (1) Battery Switch “ON“ (2) Push AED/CED test kn ob => Selftest AED/CED OK (3) => AED/CED Test Knob OK (4) Battery Switch “OFF“ G. Accomplish the function test of the Alternator Switch (1) Battery Switch “ON“ (2) Engine Master “ON“ (3) Start engine

(4) Load Selector “IDLE“ (5) Alternator Switch on: Load current (AED), Voltage > 14V (AED), Al ternator Warning Lamp (AWL) off (6) Alternator Switch off: No load current, voltage <14V, Alternator Warning Lamp on (7) => Alternator OK (8) Engine Master “OFF“ (9) Battery Switch “OFF“ S WARNING: Only run the engine on the ground with t he propeller running, even for testing purposes, in a safe and clear area and ensure that prop area is clear !

S WARNING: Only run the engine on the ground with t he propeller running, even for testing purposes, in a safe and clear area and ensure that prop area is clear !

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Rev. No: Rev. Date: Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 13 14 1 08.10.2010 6. Accomplishing a function test of all Circuit Breakers The following circuit breakers must be tested:



## • FADEC A/B



## • AED/CED



## • Starter A. Accomplish the functi on test of the Circuit Breaker FADEC A/B (1) Battery Switch “ON“ (2) Engine Master “ON“ (3) Establish CAN communication by connecting the computer to the airplane (4) Switch FADEC A/B via Circuit Breaker (5) => Circuit Breaker FADEC A/B OK (6) Remove CAN communiction (7) Engine Master “OFF“ (8) Battery Switch “OFF“ B. Accomplish the functi on test of the Circuit Breaker AED/CED (1) Battery Switch “ON“ (2) Engine Master “ON“ (3) Switch AED/CED via Circuit Breaker AED/CED (4) => Circuit Beaker AED/CED OK (5) Engine Master “OFF“ (6) Battery Switch “OFF“ C. Accomplish the functi on test of the Circuit Breaker Starter (1) Battery Switch “ON“ (2) Engine Master “ON“ (3) Switch Starter via Ci rcuit Breaker Starter (4) => Circuit Breaker Starter OK (5) Engine Master “OFF“ (6) Battery Switch “OFF“

## Supplement Airplane Maintenance Manual Cessna 172 / CENTURION 2.0 AMM-20-02 (US-Version)

Chapter: Issue: Issue Date: Page: Content: 20-AMM-24-02-US 1 02.02.2007 14 14 Rev. No: Rev. Date: 1 08.10.2010 7. Accomplishing a functi on test of all 14V / 28V converters, if installed A. Accomplish the function test of all 14V / 28V converters (1) Battery Switch “ON“ (2) Main Bus Switch “ON“ (3) Consumer of electricity “ON“ (check under Load) (4) Check Voltage, a voltmeter must indicate the transformed voltage (refer to the 14V / 28V Converter manufacturer) (5) => 14V / 28V Converters OK (6) Main Bus Switch “OFF“ (7) Battery Switch “OFF“