P.O. BOX 790490 • SAN ANTONIO, TEXAS 78279-0490 • (210) 824-9421 SUBJECT: REVISION 29 TO SA227-TT POH/AFM

TO: ALL OPERATORS AND POH/AFM MANAGERS OF THE MERLIN IIIC

1. Attached is Revision 29 to Sections 0 and 3 of your POH/AFM.

2. File this transmittal letter in your AFM binder at the location most convenient to you.P.O. Box 790490 • San Antonio, Texas 78279–0490 • (210) 824–9421

## iii 

# SA227-TT MERLIN IIIC

PILOT'S OPERATING HANDBOOK AND FAA APPROVED FLIGHT MANUAL REISSUE A

(S/N TT–421 AND Subsequent)

LIST OF EFFECTIVE PAGES

Page Date Page Date

SECTION 1

Page Date Page Date



## LIST OF EFFECTIVE PAGES Title ............................................ March 28, 1996 i ..................................................August 7, 1981 ii .................................................August 7, 1981 iii .......................................... December 9, 2014 iv .......................................... December 9, 2014 v ........................................... December 7, 2007 vi ................................................... June 2, 2000 vii ............................................. October 5, 1982 viii ............................................. March 28, 1996 ix ................................................. March 5, 1982 x .................................................. June 10, 1983 xi ................................................. March 3, 1989 xii ..................................................May 11, 1999 xiii ........................................ December 9, 2014 xiv ................................................April 28, 2000

1-i................................................August 7, 1981 1-ii ...............................................August 7, 1981 1-1 ..............................................August 7, 1981 1-2 ..............................................August 7, 1981 1-3 ..............................................August 7, 1981 1-4 ..............................................August 7, 1981 1-5 ..............................................August 7, 1981 1-6 ..............................................August 7, 1981 1-7 ..............................................August 7, 1981 1-8 ..............................................August 7, 1981 1-9 ..............................................August 7, 1981 1-10 ............................................August 7, 1981 1-11 .............................................August 7, 1981 1-12 ............................................August 7, 1981 1-13 ............................................August 7, 1981 1-14 ............................................August 7, 1981 1-15 ............................................August 7, 1981 1-16 ............................................August 7, 1981

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## iv 

# SA227-TT MERLIN IIIC

PILOT'S OPERATING HANDBOOK AND FAA APPROVED FLIGHT MANUAL REISSUE A

(S/N TT–421 AND Subsequent)

LIST OF EFFECTIVE PAGES (continued)

SECTiON 2

Page Date Page Date

SECTION 3

Page Date Page Date 2-i.......................................... December 7, 2007 2-ii ...............................................August 7, 1981 2-1 ............................................... June 10, 1983 2-2 ............................................... June 10, 1983 2-3 ................................................ May 13, 1997 2-4 ..............................................August 7, 1981 2-5 ........................................ December 7, 2007 2-6 ...................................... December 29, 1986 2-7 ..............................................August 7, 1981 2-8 ............................................. March 29, 1994 2-9 ..............................................August 7, 1981 2-10 .................................... December 17, 1985 2-11 ................................................ June 2, 2000 2-12 ........................................ January 14, 1982 2-13 ............................................. March 2, 1983 2-14 .................................... November 18, 1997 2-15 .................................... November 18, 1997 2-15A ............................................. June 2, 2000 2-15B ............................................. June 2, 2000 2-16 .................................... November 18, 1997 2-17 ........................................ October 10, 1985 2-18 ............................................August 7, 1981 2-19 ............................................August 7, 1981 2-20 ............................................August 7, 1981 2-21 ........................................ October 15, 1084 2-22 ........................................ October 15, 1984

3-i.......................................... December 9, 2014 3-ii ......................................... December 9, 2014 3-1 .................................................May 11, 1999 3-2 .................................................May 11, 1999 3-3 ........................................ December 9, 2014 3-4 ........................................ December 9, 2014 3-5 ........................................ December 9, 2014 3-6 ........................................ December 9, 2014 3-7 ........................................ December 9, 2014 3-8 ........................................ December 9, 2014 3-9 ........................................ December 9, 2014 3-10 ...................................... December 9, 2014 3-11 ....................................... December 9, 2014 3-12 ...................................... December 9, 2014 3-13 ...................................... December 9, 2014 3-14 ...................................... December 9, 2014 3-15 ...................................... December 9, 2014 3-16 ...................................... December 9, 2014 3-17 ...................................... December 9, 2014 3-18 ...................................... December 9, 2014 3-19 ...................................... December 9, 2014 3-20 ...................................... December 9, 2014 3-21 ...................................... December 9, 2014 3-22 ...................................... December 9, 2014 3-23 ...................................... December 9, 2014 3-24 ...................................... December 9, 2014 3-25 ...................................... December 9, 2014 3-26 ...................................... December 9, 2014 3-27 ...................................... December 9, 2014 3-28 ...................................... December 9, 2014 3-29 ...................................... December 9, 2014 3-30 ...................................... December 9, 2014 3-31 ...................................... December 9, 2014 3-32 ...................................... December 9, 2014

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014 

## LIST OF EFFECTIVE PAGES

## xiv 

# SA227-TT MERLIN IIIC

LIST OF REVISIONS (continued)

Revision Revised FAA APPROVED Number Pages Description of Revision Signature Date

A black bar on a revised page shows the current change.



## REVISIONS Issued: April 28, 2000

## 3-i EMERGENCY PROCEDURES Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014 

# SA227-TT MERLIN IIIC

TABLE OF CONTENTS EMERGENCY PROCEDURES

ITEM PAGE

Introduction .................................................................................................................. .................... 3-1 Annunciator Panel ............................................................................................................. .............. 3-2 Engine Fire on Ground ......................................................................................................... ........... 3-3 Engine Fire in Flight.......................................................................................................... ............... 3-3 Out-of-Trim Warning ........................................................................................................... ............. 3-4 Engine Failure During Takeoff – Takeoff Aborted ............................................................................ 3-4 Engine Failure During Takeoff – Takeoff Continued at or Above V 1 ................................................. 3-5 Engine Failure During Flight .................................................................................................. .......... 3-6 Engine - Propeller Uncoupling ................................................................................................. ........ 3-7 Airstart ...................................................................................................................... ....................... 3-7 In fl ight Relight ................................................................................................................. ................. 3-7 Single Engine Landing.......................................................................................................... ........... 3-8 After Touchdown .............................................................................................................. ....... 3-9 Single Engine Go-Around ....................................................................................................... ....... 3-10 Engine Control Malfunction .................................................................................................... ....... 3-10 No Response to Power Lever Movement .......................................................................................3-11 Battery Temperature Caution/Warning Lights On .......................................................................... 3-12 Amber Light Illuminates ...................................................................................................... .. 3-12 Red Warning Light Illuminates (Any Phase of Operations) .................................................. 3-12 Double Generator Failure ...................................................................................................... ........ 3-14 Double Engine Failure (Restarts/Relights Unsuccessful) .............................................................. 3-14 Total Electrical Failure ...................................................................................................... ............. 3-15 Smoke in Airplane.............................................................................................................. ............ 3-16 Wheelwell and Wing Overheat Warning Light On ......................................................................... 3-17 Steady Light ................................................................................................................. ......... 3-17 Flashing Light ............................................................................................................... ........ 3-17 Cabin Pressurization Malfunctions ............................................................................................. ... 3-18 Low Pressure Malfunction .................................................................................................... 3 -18 High Pressure malfunction ................................................................................................... 3 -18 Excessive Rate of Pressurization ......................................................................................... 3-19 Emergency Descent Procedure.................................................................................................... . 3-20 Cabin Door Warning Light On ................................................................................................... .... 3-20 Prior to Takeoff ...................................................................................................................... 3-20 In Flight .................................................................................................................... ............. 3-20 Hydraulic System Failure....................................................................................................... ........ 3-21 Landing Gear Emergency Extension ............................................................................................. 3 -22 Gear Up Landings .............................................................................................................. ........... 3-24 Stabilizer Trim Malfunctions................................................................................................... ........ 3-25 Stabilizer Trim System Runaway .......................................................................................... 3-25 Pilot's Trim System Inoperative ............................................................................................ 3- 26 Copilot's Trim System Inoperative ........................................................................................ 3-26 Both Pilot's and Copilot's Trim System Inoperative .............................................................. 3-26 Go-Around with Stabilizer Trim Inoperative .......................................................................... 3-27

## 3-ii EMERGENCY PROCEDURES Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014 

# SA227-TT MERLIN IIIC

TABLE OF CONTENTS EMERGENCY PROCEDURES

ITEM PAGE

Stability Augmentation and Stall Avoidance System (SAS 2 ) Malfunctions .................................... 3-27 SAS Fault Light On in Flight ................................................................................................. 3-27 SAS 2 Malfunction – Nose Down ........................................................................................... 3-28 Aural Stall Warning at Speeds Well in Excess of Normal Stall Warning Speeds ................. 3-29 Yaw Damper Malfunctions ....................................................................................................... ...... 3-30 Power Failure ................................................................................................................ ....... 3-30 Electrical Servo Runaway ..................................................................................................... 3-30 Emergency Exit ................................................................................................................ ............. 3-30 Nose Wheel Steering Electrical Malfunction.................................................................................. 3-3 1 Nose Wheel Steering Hydraulic Malfunction ................................................................................. 3-32

## EMERGENCY PROCEDURES 3-3 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

ENGINE FIRE ON GROUND

1. ENGINE STOP AND FEATHER CONTROL (affected engine) ..................................... PULL 2. ENGINE STOP BUTTON (affected engine) ................................................................ PRESS 3. FUEL SHUTOFF SWITCH (affected engine) ...........................................................CLOSED 4. HYDRAULIC SHUTOFF SWITCH (affected engine) ................................................CLOSED 5. FIRE EXTINGUISHER SWITCH (affected engine) ..................................................... PRESS 6. Generator Switch (affected engine) ................................................................................... OFF

NOTE

Use of start test with respective generator switch ON may cause a battery fault and subsequent loss of ability to motor the engine.

7. Starter Test Switch (affected engine) ......................................................................... ENGAGE 8. Fuel Boost Pump Switch (affected engine) ........................................................................ OFF 9. Affected Engine ...........................................................MOTOR UNTIL ENGINE IS CLEARED

ENGINE FIRE IN FLIGHT

WARNING

IN THE EVENT OF AN ENGINE FAILURE OR POWER LOSS, THE ENGINE NEGATIVE TORQUE SYSTEM (NTS) ONLY PROVIDES PARTIAL DRAG REDUCTION BUT NOT TO THE EXTENT OF A FULLY FEATHERED PROPELLER.

PILOT MUST TAKE ACTION TO FULLY FEATHER THE PROPELLER (ON THE AFFECTED ENGINE) TO REDUCE PROPELLER DRAG.

1. ENGINE STOP AND FEATHER CONTROL (affected engine) ..................................... PULL 2. FUEL SHUTOFF SWITCH (affected engine) ...........................................................CLOSED 3. HYDRAULIC SHUTOFF SWITCH (affected engine) ................................................CLOSED 4. FIRE EXTINGUISHER SWITCH (affected engine) ..................................................... PRESS 5. Fuel Boost Pump Switch (affected engine) ........................................................................ OFF 6. Generator Switch (affected engine) ................................................................................... OFF *7. Bleed Air Switch (affected engine) ..................................................................................... OF F 8. Power Lever (operating engine) .......................................................................AS REQUIRED *9. Bleed Air (operating engine) .............................................................................AS REQUIRED

NOTE

If the 100% torque limit is not being developed and bleed air is on, increased power may be obtained by selecting bleed air off.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## 3-4 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014 ENGINE FIRE IN FLIGHT (continued)

10. Trim ...................................................................................................................AS REQUIRED 11. Generator (operating engine) ................................................................ 300 AMPS MAXIMUM *12. Propeller Synchrophaser Switch (if installed) .......................................TAKEOFF & LANDING

OUT-OF-TRIM WARNING

AURAL OUT-OF-TRIM WARNING ............................................................ABORT TAKEOFF

ENGINE FAILURE DURING TAKEOFF – TAKEOFF ABORTED

1. POWER LEVERS ............................................................................................ GROUND IDLE

NOTE

Retard power levers to ground idle as directional control permits. Retarding the power lever of the operating engine from fl ightidle to ground idle will cause the airplane to yaw toward the operating engine.

2. BRAKES ...........................................................................................................AS REQUIRED 3. Nose Wheel Steering ........................................................................................AS REQUIRED 4. Reverse Thrust (operating engine) ...................................................................AS REQUIRED

CAUTION

REVERSE THRUST ON THE OPERATING ENGINE WILL CAUSE A YAWING MOMENT TOWARD THE OPERATING ENGINE WHICH IS PROPORTIONAL TO THE AMOUNT OF REVERSE THRUST APPLIED. ON WET OR ICY RUNWAYS, IT IS POSSIBLE TO APPLY MORE ASYMMETRIC REVERSE THRUST THAN CAN BE COUNTERACTED BY OPPOSITE BRAKE, RUDDER, AND NOSE WHEEL STEERING.

5. Engine Stop and Feather Control (failed engine) .............................................................PULL 6. Engine Clean Up Procedure (failed engine) a. Fuel shutoff switch ................................................................................................CLOSED b. Hydraulic shutoff switch ........................................................................................CLOSED c. Fuel boost pump switch ............................................................................................... OFF d. Generator switch .......................................................................................................... OFF *e. Bleed air switch ......................................................................................................... ... OFF 7. AWI Switch ................................................................................................................ ........ OFF

## EMERGENCY PROCEDURES 3-5 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

ENGINE FAILURE DURING TAKEOFF – TAKEOFF CONTINUED AT OR ABOVE V 1

WARNING

IN THE EVENT OF AN ENGINE FAILURE OR POWER LOSS, THE ENGINE NEGATIVE TORQUE SYSTEM (NTS) ONLY PROVIDES PARTIAL DRAG REDUCTION BUT NOT TO THE EXTENT OF A FULLY FEATHERED PROPELLER.

PILOT MUST TAKE ACTION TO FULLY FEATHER THE PROPELLER (ON THE AFFECTED ENGINE) TO REDUCE PROPELLER DRAG.

1. POWER LEVER (operating engine) .................... SET MAXIMUM POWER (DRY OR WET)

NOTE

• Commanding high propeller blade angle by keeping the power

lever of the inoperative engine well forward will reduce windmilling propeller drag in the event that NTS failure accompanies engine failure.

• Set 650 o C EGT or 100% torque, whichever occurs fi rst. If during a dry takeoff the 100% torque limit is not being developed and bleed air is ON, increased power may be obtained by selecting bleed air OFF or by selecting continuous alcohol-water injection. Observe CAWI climatic operating limitations.

*2. LANDING GEAR (after liftoff) .............................................................................................U P

WARNING

IF THE ENGINE FAILURE IS ACCOMPANIED BY A LEFT ESSENTIAL BUS FAILURE (AS INDICATED BY LOSS OF POWER TO THE GEAR POSITION INDICATOR) THE LANDING GEAR WILL NOT RETRACT UNTIL THE LANDING GEAR CONTROL ESSENTIAL BUS POWER TRANSFER IS MOVED TO THE RIGHT BUS POSITION.

*3. FLAPS ..................................................................................................................... .............UP

4. ENGINE STOP AND FEATHER CONTROL (failed engine). ......................................... PULL 5. AIRSPEED .....................................................SINGLE ENGINE BEST RATE CLIMB SPEED 136 KIAS

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## 3-6 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

ENGINE FAILURE DURING TAKEOFF – TAKEOFF CONTINUED AT OR ABOVE V 1 (continued)

6. Engine Clean Up Procedure (failed engine) a. Fuel shutoff switch ................................................................................................CLOSED b. Hydraulic shutoff switch ........................................................................................CLOSED c. Fuel boost pump switch ............................................................................................... OFF d. Generator switch .......................................................................................................... OFF *e. Bleed air switch ......................................................................................................... ... OFF 7. Power Lever (operating engine) .......................................................................AS REQUIRED 8. Trim ...................................................................................................................AS REQUIRED 9. Generator (operating engine) ................................................................ 300 AMPS MAXIMUM *10. Propeller Synchrophaser Switch (if installed) .......................................TAKEOFF & LANDING 11. AWI Switch .......................................................................................................AS REQUI RED

ENGINE FAILURE DURING FLIGHT

WARNING

IN THE EVENT OF AN ENGINE FAILURE OR POWER LOSS, THE ENGINE NEGATIVE TORQUE SYSTEM (NTS) ONLY PROVIDES PARTIAL DRAG REDUCTION BUT NOT TO THE EXTENT OF A FULLY FEATHERED PROPELLER.

PILOT MUST TAKE ACTION TO FULLY FEATHER THE PROPELLER (ON THE AFFECTED ENGINE) TO REDUCE PROPELLER DRAG.

1. ENGINE STOP AND FEATHER CONTROL (failed engine) .......................................... PULL 2. Engine Clean Up Procedure (failed engine) a. Fuel shutoff switch ................................................................................................CLOSED b. Hydraulic shutoff switch ........................................................................................CLOSED c. Fuel boost pump switch ............................................................................................... OFF d. Generator switch .......................................................................................................... OFF *e. Bleed air switch ......................................................................................................... ... OFF 3. Power Lever (operating engine) .......................................................................AS REQUIRED *4. Bleed Air (operating engine) .............................................................................AS REQUIRED

NOTE

If the 100% torque limit is not being developed and bleed air is on, increased power may be obtained by selecting bleed air off.

5. Trim ...................................................................................................................AS REQUIRED 6. Generator (operating engine) ................................................................ 300 AMPS MAXIMUM *7. Propeller Synchrophaser Switch (if installed) .......................................TAKEOFF & LANDING

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## EMERGENCY PROCEDURES 3-7 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

ENGINE - PROPELLER UNCOUPLING

WARNING

• IN THE EVENT OF ENGINE FAILURE IN CONJUNCTION

WITH ENGINE UNCOUPLING, REDUCE WINDMILLING DRAG AS FOLLOWS:

• IF AN UNCOUPLING EVENT OCCURS WHERE THE ENGINE IS OPERATING AND THE PROPELLER IS STOPPED AND FEATHERED, RETARDING THE POWER LEVER TO FLIGHT IDLE MAY RESULT IN UNFEATHERING AND SUBSEQUENT ROTATION OF THE PROPELLER. IF THIS OCCURS, ADVANCE THE POWER LEVER TO MAXIMUM POWER POSITION.

• IN THE EVENT OF AN ENGINE WITH AN NTS AND/OR

FEATHER VALVE MALFUNCTION, SETTING THE ASSOCIATED POWER LEVERS FULL FORWARD WILL DRIVE THE PROPELLER BLADES TOWARD THE FEATHER POSITION YIELDING A LOWER WINDMILLING PROPELLER DRAG AND PROPELLER SHAFT SPEED.

AIRSTART

CAUTION

IF AN ENGINE HAS BEEN SHUT DOWN BECAUSE OF AN OBVIOUS FAILURE, AS INDICATED BY THE ENGINE IN- STRUMENTS OR EXCESSIVE VIBRATION, AN AIRSTART SHOULD NOT BE ATTEMPTED. AIRSTART FOLLOWING INTENTIONAL ENGINESHUTDOWN IS COVERED IN SECTION 3A, ABNORMAL PROCEDURES.

INFLIGHT RELIGHT

CAUTION

• THIS PROCEDURE IS INTENDED FOR USE DURING FLIGHT

ONLY.

• ATTEMPTED USE OF THIS PROCEDURE WHILE ON THE

GROUND WITH LIMITED AIRFLOW THROUGH THE ENGINE COULD RESULT IN ENGINE OVER-TEMPERATURES.

• THIS PROCEDURE IS INTENDED FOR USE ONLY WHEN THE

REASON FOR THE INADVERTENT FLAMEOUT IS KNOWN WITH CERTAINTY AND WHEN THE PILOT IS CERTAIN THAT A RELIGHT WILL NOT AGGR AVATE THE CONDITION.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## 3-8 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

INFLIGHT RELIGHT (continued)

1. Power Lever ............................................APPROXIMATELY 1/4 INCH ABOVE FLIGHT IDLE (WARNING HORN SILENCED) 2. Speed Lever ...............................................................................APPROXIMATELY 96% RPM 3. Airspeed .....................................................................................BETWEEN 180 and 100 KIAS 4. RPM ................................................................................................BETWEEM 60% AND 10% 5. Engine Start Button .............................................................................PRESS MOMENTARILY

NOTE

• Press the start button in only long enough to obtain ignition

and fuel fl ow and subsequent light-off.

• If RPM has decayed below 10%, the start button will have to be

held in while the unfeathering pump drives the propeller blades to fi ner pitch and RPM increases to above 10%. Ignition, fuel fl ow, and light-off should then occur.

• Engine relight will not occur if the SRL computer speed

switch function has failed or if the SRL – ∆ P/P switch is in the OFF position.

6. EGT ................................................................MONITOR (770 o C MAXIMUM ONE SECOND) 7. RPM ...................................................................................................................... S TABILIZED 8. SRL OFF Light ......................................................................................................CHECK O FF 9. Power ...................................................................................................RESET AS REQUIRED

SINGLE ENGINE LANDING

WARNING

IN THE EVENT OF AN ENGINE FAILURE OR POWER LOSS, THE ENGINE NEGATIVE TORQUE SYSTEM (NTS) ONLY PROVIDES PARTIAL DRAG REDUCTION BUT NOT TO THE EXTENT OF A FULLY FEATHERED PROPELLER.

PILOT MUST TAKE ACTION TO FULLY FEATHER THE PROPELLER (ON THE AFFECTED ENGINE) TO REDUCE PROPELLER DRAG.

*1. No Smoking – Fasten Seat Belt Sign .................................................................................. ON 2. Fuel Quanity .......................................................CHECK (500 LBS. MAXIMUM IMBALANCE)

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## EMERGENCY PROCEDURES 3-9 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

SINGLE ENGINE LANDING (continued)

NOTE

If excess fuel imbalance is indicated on fuel quantity gauge,

con fi rm by checking trim position as gauge may be incorrect. If excess imbalance exists, open fuel cross fl ow switch to balance fuel within tolerences.

3. Fuel Cross fl ow Switch .........................OPEN IF REQUIRED TO BALANCE, THEN CLOSED 4. Cabin Differential Pressure ..............................................................................................Z ERO 5. Electrical Load ................................................................TURN OFF NONESSENTIAL ITEMS 6. Speed Lever (operating engine) ..............................................................................HIGH RPM 7. Flaps ......................................................................................DO NOT EXTEND BEYOND 1/2 UNTIL LANDING IS ASSURED 8. Landing Gear .......................................................... EXTEND WHEN LANDING IS ASSURED 9. Nose Wheel Steering ....................................................................................................ARM ED 10. Ignition Mode Switches .....................................................................................AS REQUIRED

AFTER TOUCHDOWN

1. Brakes ...............................................................................................................AS REQUIRED 2. Nose Wheel Steering ........................................................................................AS REQUIRED 3. Power Levers ....................................................................................................GROUND IDL E

NOTE

Retard power levers to ground idle as directional control permits. Retarding the power lever of the operating engine from fl ight idle to ground idle will cause the airplane to yaw toward the operating engine.

4. Reverse Thrust .................................................................................................AS REQUIRED

CAUTION

REVERSE THRUST ON THE OPERATING ENGINE WILL CAUSE A YAWING MOMENT TOWARD THE OPERATING ENGINE WHICH IS PROPORTIONAL TO THE AMOUNT OF REVERSE THRUST APPLIED. ON WET OR ICY RUNWAYS, IT IS POSSIBLE TO APPLY MORE ASYMMETRIC REVERSE THRUST THAN CAN BE COUNTERACTED BY OPPOSITE BRAKE, RUDDER, AND NOSE WHEEL STEERING.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## 3-10 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

SINGLE ENGINE GO-AROUND

WARNING

IN THE EVENT OF AN ENGINE FAILURE OR POWER LOSS, THE ENGINE NEGATIVE TORQUE SYSTEM (NTS) ONLY PROVIDES PARTIAL DRAG REDUCTION BUT NOT TO THE EXTENT OF A FULLY FEATHERED PROPELLER.

PILOT MUST TAKE ACTION TO FULLY FEATHER THE PROPELLER (ON THE AFFECTED ENGINE) TO REDUCE PROPELLER DRAG.

1. Power ................................................................................................................AS REQUIRED 2. Landing Gear .............................................................................................................. ..........UP 3. Flaps ........................................................................................... RETRACT IN INCREMENTS 4. Airspeed .....................................................SINGLE ENGINE BEST RATE OF CLIMB SPEED 136 KIAS *5. Bleed Air Switch ......................................................................................................... ........ OFF 6. Engine Anti-Ice ................................................................................OFF UNLESS REQUIRED

ENGINE CONTROL MALFUNCTION

In the event there is an indication of improper operation of a fuel control or propeller control, it is recommended that the affected engine be shut down and a single engine landing accomplished.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## EMERGENCY PROCEDURES 3-11 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

NO RESPONSE TO POWER LEVER MOVEMENT

If either engine (or both) exhibits a lack of response to the power lever after extended operation at high altitude with OAT below freezing, the cause may be ice blockage of the P T2 inlet sensor probe. In certain fl ight conditions, when engine anti-ice would not normally be ON, probe icing can occur even though visible moisture is not present. If lack of power lever response is observed, the following procedure should be accomplished:

1. Ignition Switches ......................................................................................................... .... CONT 2. Engine Heat Switch(es) ......................................................................ENGINE & PROP HEAT

This will introduce anti-icing air to the sensors (as well as the engine inlet) and normal power lever response should return within approximately 3 minutes.

After the condition has cleared and normal operation is observed, anti-ice and ignition can again be turned OFF.

1. Engine Heat Switch(es) ....................................................................................AS REQUIRED 2. Ignition Switches ......................................................................................................... .....AUTO

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## 3-12 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

BATTERY TEMPERATURE CAUTION / WARNING LIGHTS ON

NOTE

• The amber caution light illuminates if either battery temperature

reaches 120 o ± 3 o F.

• The red warning light illuminates if either battery temperature

reaches 150 o ± 3 o F.

AMBER LIGHTS ILLUMINATES

1. Before Engine Start ............................................................DO NOT MAKE BATTERY START

NOTE

Either obtain a GPU or wait until the batteries have cooled.

2. After Engine Start .......................... MONITOR BATTERY TEMPERATURE INDICATOR AND GENERATOR LOADS 3. Temperature Increasing to 140 o F ............................................................. DO NOT TAKE OFF 4. Temperature Increasing above 140 o F ...........................AFFECTED BATTERY SWITCH OFF 5. In Flight .......................................... MONITOR BATTERY TEMPERATURE INDICATOR AND GENERATOR LOADS / AFFECTED BATTERY SWITCH OFF IF REQUIRED

RED WARNING LIGHT ILLUMINATES (Any Phase of Operations)

1. Affected Battery Switch ...................................................................................................... OFF 2. BAT DISC Light (affected battery) ...........................................................................CHECK ON 3. Battery Temperature Indicator ................................................................ MONITOR CLOSELY

WARNING

• WHEN ON GROUND SHUT DOWN ENGINES AND INSPECT

AFFECTED BATTERY AS SOON AS POSSIBLE.

• WHEN IN FLIGHT AND BATTERY TEMPERATURE(S) CONTINUE TO RISE AFTER DISCONNECT, LAND AS SOON AS PRACTICABLE, AND INSPECT BATTERY.

• TAKEOFF AFTER A BATTERY TEMPERATURE WARNING

(RED LIGHT) ILLUMINATES IS PROHIBITED UNTIL THE CAUSE OF THE OVERHEAT WARNING IS CORRECTED.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## EMERGENCY PROCEDURES 3-13 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

BATTERY TEMPERATURE CAUTION / WARNING LIGHTS ON (continued)

NOTE

A battery temperature red warning light caused by a thermal runaway may sometimes be veri fi ed by observing sustained and excessively high generator loads when the affected battery switch is on.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## 3-14 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

DOUBLE GENERATOR FAILURE

1. Both Generator Switches ................................................................................................... OFF 2. Electrical Load ........................................................................................................... REDUCE 3. Generator and Start Control Circuit Breakers ...............................................................CHECK 4. Left Generator Switch ............................................................... RESET/VOLTAGE CHECKED 5. Left Generator Switch .................................................................................................... ...... ON If left generator will not go on line, turn it OFF and try the right generator.

NOTE

If one of the two generators can be put on line, consideration should be given to continuing the fl ight with a single generator rather than risking a second double generator failure.

6. Right Generator Switch ............................................................. RESET/VOLTAGE CHECKED 7. Right Generator Switch ........................................................................................................ ON

NOTE

• If neither generator voltage is within limits, it is acceptable to

put a single generator on line.

• If neither generator can be put on line, all electrical systems

(except auxiliary air conditioning systems) will be functional on battery power. However, electrical loads should be quickly reduced to the minimum for existing fl ight conditions to prolong battery life.

WARNING

WHEN IN FLIGHT ON BATTERY POWER ALONE, LAND AS SOON AS PRACTICABLE TO PRECLUDE COMPLETE ELECTRICAL FAILURE.

DOUBLE ENGINE FAILURE (RESTARTS/RELIGHTS UNSUCCESSFUL)

1. AIRSPEED .................................................................... MAINTAIN BEST GLIDE AIRSPEED

GLIDE AIRSPEED WEIGHT (POUNDS) 13,000* 12,000 10,000 8,500 AIRSPEED (KIAS) 154 148 136 126

NOTE

• Best glide airspeed is approximately 1.5 V/V S on the SAS indicator.
• Glide ratio at best glide airspeed is approximately 10:1

(2NM/1,000 FT AGL). * For use with Sup 1 only.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## EMERGENCY PROCEDURES 3-15 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

DOUBLE ENGINE FAILURE (RESTARTS/RELIGHTS UNSUCCESSFUL) (continued)

2. GEAR ...................................................................................................................... .............UP 3. FLAPS ..................................................................................................................... .............UP 4. Complete Engine Failure During Flight Checklist Plan for emergency gear extension and a zero fl ap landing. If altitude above ground level (AGL) permits, unfeathering one engine may provide suf fi cient hydraulic pressure to operate the fl aps.

TOTAL ELECTRICAL FAILURE

1. Entrance Light Switch ................................................. ON (IF ILLUMINATION IS REQUIRED)

NOTE

The pilot's overhead and entrance door flood lights are powered by the right battery relay when the entrance light switch is in its ON position.

2. Both Battery and Both Generator Switches ....................................................................... OFF 3. Battery Switches (individually) ................................................................................ RESET/ON 4. Generator Switches (individually) ........................................................................... RESET/ON

If total electrical failure occurred as a result of lightning strike or static discharge, the aircraft should be thoroughly inspected for evidence of lightning damage. See the SA227 Maintenance Manual, Chapter 05 and the TPE 331 Maintenance Manual, Chapter 72.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## 3-16 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

SMOKE IN AIRPLANE

1. CREW OXYGEN MASKS .................................................................................................DON *2. If Smoke or Fire from Electrical Source: *a. Smoke or fi re from essential bus (1) Bus tie switch ........................................................................................................ OFF (2) Bus transfer switches .................................................... OPPOSITE ESSENTIAL BUS *b. Smoke or fi re from nonessential bus • Bus tie switch ........................................................................................................ OFF 3. If Smoke from Bleed Air Source: * Bleed air switches .................... TURN OFF ONE SOURCE. IF SMOKE CONTINUED, TURN BACK ON AND TURN OTHER SOURCE OFF. IF UNSUCCESSFUL, TURN OFF BOTH SOURCES.

NOTE

It is unlikely that both bleed air systems would malfunction simultaneously. However, if they should, closing both bleed air valves would prevent more smoke from entering the cockpit and cabin. But the out fl ow valve would then close in order to retain cabin differential pressure and the existing smoke would be trapped until depressuring procedures are begun.

4. If Smoke in Rear of Airplane .......... USE MANUAL PRESSURIZATION AND SELECT FULL DECREASE. WHEN PRESSURE DIFFERENTIAL IS ZERO ACTIVATE CABIN DUMP SWITCH. *5. If Smoke is in Cockpit ........................................................ACTIVATE CABIN DUMP SWITCH 6. Emergency Descent .........................................................................................AS REQUIRED 7. Airspeed ...................................................................................................173 KIAS MAXIMUM 8. Landing Gear .............................................................................................................. ... DOWN *9. Fresh Air Fan ..........................................................................................................OV ERRIDE

NOTE

• If failure occurs in the pneumatic or electrical system of the

bleed air control valve, the engine may have to be shut down to stop the fl ow of bleed air.

• If an engine must be shut down to eliminate bleed air from

entering the cockpit and cabin, the landing gear should be retracted to ensure adequate single engine performance.

• Whether or not smoke has dissipated, if it cannot be visibly

veri fi ed that the fi re has been extinguished following fire suppression and/or smoke evacuation procedures, land immediately at the nearest suitable airport.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## EMERGENCY PROCEDURES 3-17 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

WHEELWELL AND WING OVERHEAT WARNING LIGHT ON

STEADY LIGHT (indicates brake fi re, wheelwell or air conditioning duct overheat)

*1. BLEED AIR SWITCH (affected side) .............................................................................. OFF 2. LANDING GEAR ........................................................................................................... DO WN Leave gear extended at least three (3) minutes to allow cooling of overheated brakes in order to preclude a brake/tire fi re and tire explosion. 3. GENERATOR SWITCH (affected side) ........................................................................... OFF

NOTE

If the warning light extinguishes, retract the landing gear after three (3) minutes cooling and continue fl ight with the bleed air OFF; the generator may be RESET/ON. If the light reilluminates STEADY

, extend the gear. Expect performance degradation due to the drag of the gear. A diversion and precautionary landing may be necessary. If the light changes to a FLASHING mode complete the wheelwell wing overheat fl ashing items.

CAUTION

IF THE WARNING LIGHT DOES NOT EXTINGUISH WITHIN THREE MINUTES, THE AFFECTED ENGINE SHOULD BESHUT DOWN. THE LANDING GEAR MAY HAVE TO BE RETRACTED TO SUSTAIN FLIGHT UNTIL ARRIVING AT A SUITABLE LANDING FIELD.

FLASHING LIGHT (indicates a wing leading edge bleed air line failure or an overheated generator wire)

*1. BLEED AIR SWITCH (affected side) .............................................................................. OFF

2. GENERATOR SWITCH (affected side) ........................................................................... OFF

CAUTION

IF THE WARNING LIGHT DOES NOT EXTINGUISH WITHIN THREE MINUTES, THE AFFECTED ENGINE SHOULD BE SHUT DOWN.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## 3-18 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

CABIN PRESSURIZATION MALFUNCTIONS

LOW PRESSURE MALFUNCTION

The cabin altitude warning light illuminates when the cabin pressure is equivalent to a pressure altitude between 10,000 feet and 12,000 feet. Check differential pressure and the controller setting. If the cabin pressurization is not providing proper cabin pressure, change to manual operation. If thedesired differential pressure still cannot be attained, and excessive leak exists then it may be necessary to descend or use oxygen.

HIGH PRESSURE MALFUNCTION

If the cabin differential pressure exceeds the normal limit of 7 psi, the cabin pressurization controller may have failed and allowed the out flow to close. Open the manual control valve approximately onehalf turn, select MANUAL position on the cabin pressure selector, and regulate pressure manually. If manual control is ineffective, the safety valve should relieve excess cabin pressure at 7.25 psi. Priorto landing, the cabin pressure differential must be eliminated by use of the manual control or the following alternate procedure:

1. Altitude ................................................................................................... BELOW 12,000 FE ET *2. Bleed Air Switches ....................................................................................................... ...... OFF 3. Allow cabin to depressurize to less than 1 psi differential. *4. Cabin Dump Switch ........................................................................................................ DUMP

NOTE

If cabin pressure is dumped when a signi ficant cabin pressure differential exists, the resulting sensation may be alarming and uncomfortable to passengers. Consequently, use of the dump alve should normally be restricted to situations where cabin pressure differential is less than 1 psi or when other methods of pressure differential control are ineffective.

*5. Bleed Air Switches ....................................................................................................... ........ ON 6. Proceed unpressurized to airport. Air conditioning will be available.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## EMERGENCY PROCEDURES 3-19 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

CABIN PRESSURIZATION MALFUNCTIONS (continued)

EXCESSIVE RATE OF PRESSURIZATION

If an excessive rate of pressurization is experienced and it cannot be controlled by the rate knob on the cabin pressurization controller or by the manual control knob, the following steps should be acomplished:

*1. Bleed Air Switches ....................................................................................................... ...... OFF

If step 1 eliminates the excessive rate of pressurization, determine the source of the malfunction by turning the bleed air controls on individually. If the malfunction was caused by one of the bleed air control valves, leave the malfunctioning side off and continue pressurized fl ight using bleed air from one engine.

If the pressure surge does not decrease: *2. Cabin Dump Switch ........................................................................................................ DUMP

NOTE

If cabin pressure is dumped when a signi fi cant cabin pressuredifferential exists, the resulting sensation may be alarming and uncomfortable to passengers. Consequently, use of the dump valve should normally be restricted to situations where cabin pressuredifferential is less than 1 psi or when other methods of pressure differential control are ineffective.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## 3-20 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

EMERGENCY DESCENT PROCEDURES

If the cabin pressure is lost for any reason while at high altitude, execute the following procedure:

*1. PASSENGER OXYGEN SWITCH ....................................................................................... ON 2. PASSENGER AND CREW OXYGEN MASKS .................................................................DON 3. Speed Levers ...........................................................................................................HIGH RPM 4. Power Levers .......................................................................................................FLIGHT IDLE 5. Airspeed ...................................................................................................173 KIAS MAXIMUM 6. Landing Gear .............................................................................................................. ... DOWN 7. Flaps ..................................................................................................................... .. ONE-HALF 8. Altitude ..............................................................................................................AS R EQUIRED

NOTE

• A pitch attitude of approximately 10 o nose down will allow the

airplane to stabilize very close to the gear limit speed of 173 KIAS in the 1/2 fl aps con fi guration.

• This procedure results in a descent from 31,000 feet to 15,000

feet within three and three-quarter minutes when initiated from cruise power and airspeed.

CABIN DOOR WARNING LIGHT ON

PRIOR TO TAKEOFF

1. Do not takeoff.

IN FLIGHT

A cabin door warning during fl ight could indicate that a cabin door handle is not fully closed, that one or more of the door latches is not fully extended, or that one or more of the door latch switches is maladjusted. The latter problem is typically annunciated when the cabin differential pressure reaches approximately 5 psi during climbs. Reducing cabin differential pressure to less than approximately 4 psi will allow the pressure vessel to de fl ate, the door latch to seat the switch, and the warning light to go out. If the door warning light should illuminate during fl ight, conduct the following:

1. Keep crew and passengers clear of door. *2. Turn seat beltsign on. 3. Reduce cabin differential pressure until the warning light goes out. 4. Descend as required. 5. Land as soon as practicable. 6. Determine cause of warning prior to further fl ight.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## EMERGENCY PROCEDURES 3-21 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

HYDRAULIC SYSTEM FAILURE

An emergency hand pump and a cable operated manual release system are provided to extend the landing gear in the event of a hydraulic failure. A stand pipe system in the hydraulic reservoir provides a supply of fluid for hand pump operation. The manual release system also permits free fall gear extension in the event that all hydraulic fl uid is lost.

There are no emergency provisions to extend or retract the fl aps. Landing approach should be made at 1.3 V S1 for the existing airplane con fi guration. (For fl aps up con fi guration, use 133 KIAS at 12,500 pounds gross weight. Reduce this speed by 6 KIAS for each 1,00 pounds less gross weight.)

WARNING

IN THE EVENT OF A HYDRAULIC SYSTEM MALFUNCTION, THE NOSE WHEEL STEERING SYSTEM MUST NOT BE ARMED. STEER WITH BRAKES, POWER AND RUDDER.

CAUTION

If Anti-Skid Installed: • WHEEL ANTI-SKID PROTECTION WILL NOT BE AVAILABLE

FOLLOWING HYDRAULIC SYSTEM FAILURE. THE ANTI-SKID SWITCH MUST BE TURNED OFF AND MANUAL BRAKING USED DURING GROUND OPERATIONS.

• IF THERE IS ANY INDICATION THAT BRAKE POWER IS

ON AND THERE IS NO ANTI-SKID PROTECTION, TURN THE ANTI-SKID SWITCH OFF.

In case of hydraulic system failure:

1. Prepare for emergency extension of the landing gear. 2. Prepare for landing with existing wing fl aps con fi guration. 3. Ensure that the nose wheel steering switch is turned OFF and remains OFF. 4. Ensure that the anti-skid switch is turned OFF and remains OFF. (If anti-skid installed)

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## 3-22 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

LANDING GEAR EMERGENCY EXTENSION

1. Airspeed ...................................................................................................173 KIAS MAXIMUM 2. Landing Gear Handle ..................................................................................................... DOWN *3. Emergency Release Lever ..................................................................................ROTATE AFT *4. Hand Pump Valve Handle ........................................ PULL PIP PIN/ROTATE VALVE HANDLE 90 DEGREES FORWARD *5. Emergency Hand Pump .........................................................................PUMP AS REQUIRED a. Gear indicator ...........................................................................ALL DOWN AND LOCKED b. Hydraulic pressure gauge ................................................................... 500 PSI TO 800 PSI

NOTE

• If manual extension is used because of a failure in the landing

gear electrical control system, the hydraulic pressure gauge will continue to indicate approximately 2,000 psi system pressure.In this case, the pressure to the gear down actuators can be detected only by the effort required to move the emergency hand
pump.

• If a failure at the bottom of the hydraulic pack allows depletion

of all hydraulic fl uid, the emergency hand pump will not provide pressure. Nevertheless, Step 3 above will allow the landing gear to free fall to a safe, down, and locked position.

• Hydraulic pressure to the hydraulic nose wheel steering system

will not be available following landing gear emergency extension required by either hydraulic failures or gear position selector valve electrical failures. Do not arm nose wheel steering.

• On those aircraft which have been modi fi ed in acordance with Fairchild Aircraft Service Bulletin 32-013.Hydraulic pressure to the anti-skid brake system will not be available following landing gear emergency extension required by either hydraulic failures or gear position selector valve electrical faulires. The anti-skid caution light will be illuminated. Turn anti-skid switch off in these situations.

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## EMERGENCY PROCEDURES 3-23 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

LANDING GEAR EMERGENCY EXTENSION (continued)

If gear does not extend, the following additional procedure may allow the gear to extend.

NOTE

Extending the landing gear in this manner requires that the airplane be slowed to a minimum safe airspeed. Therefore, this procedure must be performed at high enough altitude to ensure safe fl ight operation.

1. Retract the gear.

NOTE

If the landing gear will not retract, check that the hand pump valve handle and the emergency release lever have been returned to their normal positions.

2. Use full fl aps and slow aircraft to just above fl ight idle stall speed.

3. Place the landing gear handle in the down position.

4. If the gear fails to extend, repeat the above procedure. If the gear still will not extend, repeat the above procedure using the emergency gear release lever instead of the landing gear handle. (Steps 3, 4, and 5 in Landing Gear Emergency Extension).

Issued: May 8, 1981 Reissued: August 7, 1981 Revised: December 9, 2014

## 3-24 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

Issued: January 14, 1982 Revised: December 9, 2014 GEAR UP LANDINGS

NOTE

• If either main gear will not extend, land with all three gear up if

possible. If the nose gear will not extend, land on the mains.

• Ensure that passengers are thoroughly briefed as to bracing

position and evacuation procedure.

• Consider removal and secure stowage of escape hatches prior to

landing. Expect the entrance door to operate normally. It will not open fully after landings with the nose or left gear retracted.

• Historically, airplanes of this class have received more airframe

damage from gear up landings on sod than from landings on smooth paved surfaces.

• Propeller blades contacting the surface while turning under power

tend to disintegrate and throw shrapnel which may puncture the fuselage. Blades contracting the surface when feathered, or nearly feathered, will bend slightly and wear away but most likely will not shatter and will aid in holding the wings and nacelles off the runway.

• The pilot may choose to feather one propeller early and save the

other engine for last minute glide path corrections. During approaches with one main gear up and one down, it is recommended that the propeller on the gear up side be feathered fi rst.

LANDING WITH ALL THREE GEAR UP:

1. Use full fl aps.

2. Approach the runway at 1.3 V S plus 5 to 10 KIAS.

3. Do not feather propellers until landing on the runway is assured. Drag will be reduced and gliding distance increased after propellers are feathered.

4. Shut off electrical power just prior to touchdown (this is to allow use of the pitch trim system until touchdown). Leave batteries on during night landings to permit use of landing lights.

5. Allow aircraft to touch down in a relatively fl at attitude and on center line. Use rudder for directional control.

## EMERGENCY PROCEDURES 3-25 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

GEAR UP LANDINGS (continued)

LANDING WITH NOSE GEAR UP:

1. Use normal approach technique and fl ap con fi guration.

2. Feather propellers and shut off electrical power after the mains have touched the runway. Leave batteries on during night landings to permit use of landing lights.

3. Hold the nose of the aircraft off the runway as long as practical, but not so long that pitch control is lost. Put nose on runway gently rather than letting it drop to the runway.

LANDING WITH NOSE GEAR AND ONE MAIN GEAR EXTENDED:

1. Attempt to retract all three gear. Check the position of the emergency gear release lever, the hand pump valve handle and the landing gear control circuit breaker. Transfer the landing gear control to the other essential bus using the transfer switch.

2. If possible, select the runway with the fewest obstructions and fl attest terrain on the side of the unextended gear.

3. Feather propellers after landing on the runway is assured. Drag will be reduced and gliding distance increased after propellers are feathered.

4. Shut off electrical power just prior to touchdown (this is to allow use of the pitch trim system until touchdown). Leave barrteries on during night landings to permit use of landing and taxi lights.

5. Hold the wing with the unextended landing gear off the runway as long as possible. Use brakes and rudder for aircraft directional control. Expect the aircraft to turn into the low wing.

STABILIZER TRIM MALFUNCTIONS

STABILIZER TRIM SYSTEM RUNAWAY

The application of electrical power to the stabilizer trim actuators is indicated by an aural signal. If the signal occurs in fl ight when the trim system is not being operated, the following procedure should be initiated immediately:

1. ELEVATOR CONTROL .......................OVERPOWER TO MAINTAIN AIRPLANE CONTROL 2. TRIM SELECTOR .........................................................................OFF (CENTER POSITION) 3. Trim Selector ................................................................OPPISITE POSITION FROM WHERE MALFUNCTION OCCURRED 4. Retrim as required.

Issued: December 9, 2014

## 3-26 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

STABILIZER TRIM MALFUNCTIONS (continued)

PILOT'S TRIM SYSTEM INOPERATIVE

1. Trim Selector ............................................................................................................. COPILOT 2. Pilot's Auxiliary Trim Switch, or Copilot's Trim Switches ......................... TRIM AS REQUIRED

COPILOT'S TRIM SYSTEM INOPERATIVE

1. Trim Selector ............................................................................................................. ..... PILOT 2. Pilot's Trim Switches ............................................................................... TRIM AS REQUIRED

BOTH PILOT'S AND COPILOT'S TRIM SYSTEM INOPERATIVE

1. Trim Selector .............................................................................................. OFF (CENTERED) 2. Airspeed ....................................... AS REQUIRED TO MAINTAIN LOW ELEVATOR FORCES 3. SAS 2 Clutch Switch ..........................................................................................AS REQUIRED

NOTE

• Turning the SAS 2 clutch switch OFF will reduce required pull

forces by approximately 20 pounds at approach speeds.

• If the trim system fails in an extreme nose down trim position,

do not extend fl aps unless required for landing because of the high pull force required to maintain level fl ight.

• If the trim system fails in an extreme nose up trim position,

fl ap extension (below V FE ) will reduce the push force required to maintain level fl ight.

4. Flaps (on landing approach) .............................................................................AS REQUIRED

NOTE

Flap extension decreases push force requirements.

5. Landing Gear .................................................................................... DOWN WHEN DESIRED

NOTE

Gear extension increases push force requirements slightly.

Issued: December 9, 2014

## EMERGENCY PROCEDURES 3-27 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

STABILIZER TRIM MALFUNCTIONS (continued)

GO-AROUND WITH STABILIZER TRIM INOPERATIVE

WARNING

VERY HIGH PUSH FORCES WILL BE REQUIRED IF THE FLAPS ARE RETRACTED WITH THE STABILIZER TRIM IN THE EXTREME NOSE UP POSITION. IF A GO-AROUND OR BALKED LANDING IS REQUIRED WHEN THE STABILIZER TRIM IS STUCK IN AN EXTREME NOSE UP POSITION, DO NOT RETRACT THE FLAPS IMMEDIATELY.

1. Power ................................................................................................................AS REQUIRED

NOTE Application of power increases push force requirements.

2. Flaps ........................................................................................... RETRACT IN INCREMENTS

NOTE Flap retraction increases push force requirements.

3. Airspeed ............................................... AS REQUIRED TO MAINTAIN LOW STICK FORCES 4. Landing Gear ............................................................................. RETRACT WHEN FEASIBLE

STABILITY AUGMENTATION AND STALL AVOIDANCE SYSTEM (SAS 2 ) MALFUNCTIONS

SAS FAULT LIGHT ON IN FLIGHT

1. SAS 2 CLUTCH SWITCH .................................................................................................. OFF 2. SAS 2 Computer Power Circuit Breaker ...........................................................................PULL

CAUTION

WITH THE SAS 2 DISENGAGED (OR INOPERATIVE) THE AIRPLANE WILL HAVE UNDESIRABLE STALL CHARAC-TERISTICS AT AFT CENTER OF GRAVITY LOADINGS. ADEQUATE MARGINS ABOVE THE STALL SPEED SHOULD BE MAINTAINED IN ALL OPERATIONS. ENSURE THAT TOUCHDOWN SPEED IS EQUAL TO OR GREATER THAN 1.1 V S1

.

Issued: December 9, 2014

## 3-28 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

STABILITY AUGMENTATION AND STALL AVOIDANCE SYSTEM (SAS 2 ) MALFUNCTIONS (continued)

NOTE

• With SAS 2 disengaged or inoperative, there will be no

augmented stick forces. Very light elevator forces will be required to maneuver the airplane at airspeeds below approximately 135 KIAS, particularly when operating at aft c.g. loadings.

• Fault light on fl ashing indicates a stopped servo or servo clutch disengagement.

• Fault light on steady indicates computer power failure,

or computer power failure with simultaneous servo, or clutch failure.

• With the fault light on, angle of attack and stall warning indications

may be unreliable.

SAS 2 MALFUNCTION – NOSE DOWN

In the event of a nose down malfunction (no aural tone is heard) the following procedure should be initiated:

1. ELEVATOR CONTROL .......................OVERPOWER TO MAINTAIN AIRPLANE CONTROL *2. SAS2 CLUTCH SWITCH .................................................................................................. OFF 3. SAS2 Circuit Breakers ..................................................................................................... .PULL

WARNING

PULL FORCES REQUIRED TO OVERPOWER THE STICK PUSHER MAY BECEED 60 POUNDS.

NOTE

With SAS 2 disengaged or inoperative, there will be no augmented stick forces. Very light elevator forces will be required to maneuver the airplane at airspeeds below approximately 135 KIAS, particularly when operating at aft c.g. loadings.

Issued: December 9, 2014

## EMERGENCY PROCEDURES 3-29 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

STABILITY AUGMENTATION AND STALL AVOIDANCE SYSTEM (SAS 2 ) MALFUNCTIONS (continued)

AURAL STALL WARNING AT SPEEDS WELL IN EXCESS OF NORMAL STALL WARNING SPEEDS

When an aural stall warning occurs in unaccelerated fl ight at speeds well in excess of normal stall warning speed, possible damage to the SAS 2 vane is indicated and an inadvertent nose down push may occur.

1. SAS 2 CLUTCH SWITCH .................................................................................................. OFF

To silence the stall warning horn;

2. Stall Warning Circuit Breaker ............................................................................................P ULL

WARNING

PULL FORCES REQUIRED TO OVERPOWER THE STICK PUSHER MAY EXCEED 60 POUNDS.

NOTE

With the SAS 2 disengaged or inoperative, there will be no augmented stick forces. Very light elevator forces will be required to maneuver the airplane at airspeeds below approximately 135 KIAS, particularly when operating at aft c.g. loadings.

Issued: December 9, 2014

## 3-30 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

YAW DAMPER MALFUNCTIONS

POWER FAILURE

The yaw damper warning light, located on the annunciator panel, illuminates when a power failure occurs. If such a failure occurs, the yaw damper switch should be turned OFF and care should be taken to avoid extreme skidding or slipping turns.

NOTE

Maximum allowable 90 degrees crosswind component for landing with yaw damper inoperative is 10 knots.

ELECTRICAL SERVO RUNAWAY

A runaway can occur when an erroneous electrical signal is transmitted to the yaw damper servo primary electrical clutch; however. the system is provided with a secondary mechanical clutch that prevents excessive rudder forces being generated. If a runaway occurs:

1. Rudder Pedals ................................................ AS REQUIRED FOR COORDINATED FLIGHT 2. Yaw Damper Switch ........................................................................................................... OFF 3. Avoid extreme skidding or slipping turns.

EMERGENCY EXIT

There is one emergency exit on the right side of the center cabin. The hatch is of the plug type and opens into the cabin. To open the emergency exit:

1. Cabin .............................................................................................................DEPRESSU RIZE 2. Hatch Release Handles ....................................................................PULL INBOARD AND UP

NOTE

Pull hatch inward, rotate, extend through opening, and discard outside the airplane. Ensure that the hatch is clear of the exit route of the airplane.

Issued: December 9, 2014

## EMERGENCY PROCEDURES 3-31 Issued: May 8, 1981 Reissued: August 7, 1981 

# SA227-TT MERLIN IIIC

NOSE WHEEL STEERING ELECTRICAL MALFUNCTION

Fault protection is provided by circuitry which automatically deactivates the nose wheel steering system if an electrical malfunction occurs. The nose wheel is then free to caster and rudder, differential braking, and/or differential power can be used for steering.

If the system fails to test correctly, the arm switch should be placed in the OFF position and steering accomplished with rudder, differential braking, and/or differential power.

In the event of a fl ashing NOSE STEERING light, an unwanted steering de fl ection, and/or park light illuminated when the PARK button is not depressed:

1. NWS Power Lever Button .........................................................................................RELEASE 2. Right Speed Lever ...............................................APPROXIMATELY 1/2 INCH FWD OF LOW 3. Directional Control .......................... MAINTAIN WITH RUDDER, BRAKES, AND/OR POWER 4. Nose Wheel Steering Arm Switch ...................................................................................... OFF 5. Nose Wheel Steering Circuit Breaker ...............................................................................PULL

NOTE

It is normal for the park light to remain illuminated, but vary in intesity, during the 4 to 7 second transition time from park mode to normal mode.

On those aircraft which have been modi fi ed in accordance with Fairchild Swearingen Service Bulletin 32-006.

Issued: December 9, 2014

## 3-32 Issued: May 8, 1981 Reissued: August 7, 1981 

## EMERGENCY PROCEDURES 

# SA227-TT MERLIN IIIC

NOSE WHEEL STEERING HYDRAULIC MALFUNCTION

An illuminated NOSE STEER FAIL amber annunciator light indicates that hydraulic pressure is beingsupplied to the nose wheel steering actuator but the pilot is not commanding a steering signal. Illumination of the NOSE STEER FAIL light should alert the pilot to potentially undesirable steering actuation and that corrective action may be required. Corrective action depends upon the operational phase.

NOTE

The following procedures assume that the NOSE STEER FAIL light illuminates while the nose wheel steering switch is in its ARMED position. Neither the NWS power lever button nor the speed lever switch will be effective if the nose wheel steering switch is OFF. Therefore, if the switch is OFF, corrective action must be preceded by arming the nose wheel steering system.

NOSE STEER FAIL Light on –

(DURING GROUND OPERATIONS): 1. NWS Power Lever Button ..........................................................................PRESS AND HOLD OR: 2. Right Speed Lever ......................................................................................................... ... LOW 3. NOSE STEER FAIL Light .................................................................................... CHECK OUT 4. Directional Control ................................................................................ MAINTAIN WITH NWS 5. Do Not Take Off.

(DURING INITIAL PART OF TAKEOFF ROLL): 1. NWS Power Lever Button ..........................................................................PRESS AND HOLD 2. NOSE STEER FAIL Light .................................................................................... CHECK OUT 3. Directional Control ....................................................................................................MAI NTAIN 4. Takeoff ................................................................................................................... ....... ABORT

(DURING FINAL PART OF TAKEOFF ROLL): 1. NWS Power Lever Button ..........................................................................PRESS AND HOLD 2. NOSE STEER FAIL Light .................................................................................... CHECK OUT 3. Directional Control ....................................................................................................MAI NTAIN 4. Continue with Normal Takeoff Procedures.

(IN FLIGHT WITH GEAR DOWN): 1. NWS Power Lever Button ..........................................................................PRESS AND HOLD 2. NOSE STEER FAIL Light .................................................................................... CHECK OUT

NOTE

Conduct normal landing and rollout while keeping the power lever button depressed to avoid uncommanded steering actuation.

Issued: December 9, 2014