P.O. BOX 790490 • SAN ANTONIO, TEXAS 78279-0490 • (210) 824-9421

SUBJECT: REVISION 34 TO SA227-DC AFM (6DC)

TO: ALL OPERATORS AND AFM MANAGERS OF THE SA227-DC

1. Attached is Revision 34 to Sections 0 and 3 of your 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
0-iii

6DC

FAA APPROVED: AUG 23/91

SA227-DC

FAA APPROVED AIRPLANE FLIGHT MANUAL

LIST OF EFFECTIVE PAGES

PAGE DATE PAGE DATE

SECTION 1

PAGE DATE PAGE DATE

SECTION 2

PAGE DATE PAGE DATE

Cover ................................................... DEC 02/97

0-i......................................................... AUG 23/91

0-ii ........................................................ AUG 23/91

0-iii ....................................................... DEC 09/14

0-iv ....................................................... DEC 09/14

0-v........................................................ DEC 07/07

0-vi ........................................................APR 05/07

0-vii .......................................................APR 05/07

0-viii .......................................................JUL 31/95

0-ix .........................................................JUL 31/95

0-x..........................................................JUL 31/95

0-xi .........................................................JUL 31/95

0-xii ........................................................JUL 31/95

0-xiii .......................................................JUL 31/95

0-xiv ..................................................... MAR 04/96

0-xv ...................................................... DEC 02/97

0-xvi ......................................................APR 28/00

0-xvii .................................................... DEC 07/07

0-xviii ................................................... DEC 09/14

FAA APPROVED: AUG 23/91 LIST OF EFFECTIVE PAGES

Revised: DEC 09/14

1-i..........................................................APR 05/07

1-ii .........................................................APR 05/07

1-1 ........................................................ JUN 19/92

1-2 ....................................................... NOV 12/96

1-3 ........................................................MAY 28/97

1-4 ....................................................... DEC 07/07

1-5 ........................................................SEP 29/92

1-6 ........................................................ JUN 19/92

1-7 ........................................................ JUN 23/93

1-8 ....................................................... MAR 29/94

1-9 ....................................................... DEC 31/91

1-10 ..................................................... MAR 18/93

1-11 ...................................................... MAR 29/94

1-12 ..................................................... AUG 23/91

1-13 ..................................................... AUG 23/91

1-14 ..................................................... AUG 10/94

1-15 ......................................................MAY 11/99

1-16 ......................................................SEP 29/92

1-17 ..................................................... NOV 15/91

1-18 ...................................................... JUN 23/93

1-19 ......................................................SEP 10/93

1-20 ......................................................MAY 11/99

1-21 ......................................................MAY 11/99

1-22 ...................................................... JUN 02/00

1-23 ...................................................... JUN 02/00

1-24 ...................................................... JUN 02/00

2-9 ........................................................MAY 11/99

2-10 ......................................................MAY 11/99

2-11 ...................................................... DEC 02/97

2-11a .................................................... MAR 28/95

2-11b .................................................... MAR 28/95

2-12 ...................................................... JUN 23/93

2-13 ......................................................MAY 11/99

2-14 ..................................................... DEC 02/97

2-15 ...................................................... JUN 23/93

2-16 ......................................................MAY 11/99

2-i......................................................... DEC 02/97

2-ii .........................................................OCT 06/00

2-1 ........................................................ JUN 19/92

2-2 ........................................................ JUN 19/92

2-3 ........................................................ JUN 23/93

2-4 ........................................................ JUN 23/93

2-5 ....................................................... DEC 02/97

2-6 ........................................................ FEB 29/00

2-7 ........................................................ FEB 29/00

2-8 ........................................................ FEB 29/00
0-iv

6DC

FAA APPROVED: AUG 23/91

SA227-DC

FAA APPROVED AIRPLANE FLIGHT MANUAL

LIST OF EFFECTIVE PAGES (continued)

SECTION 2 (continued)

PAGE DATE PAGE DATE

SECTION 3

PAGE DATE PAGE DATE

FAA APPROVED: AUG 23/91

Revised: DEC 09/14

LIST OF EFFECTIVE PAGES

2-17 ......................................................MAY 11/99

2-18 ..................................................... MAR 28/95

2-19 ......................................................MAY 11/99

2-20 .......................................................JUL 28/92

2-21 ......................................................MAY 11/99

2-22 ..................................................... AUG 23/91

2-23 ...................................................... JUN 23/93

2-24 ..................................................... DEC 02/97

2-25 ......................................................MAY 11/99

2-26 ......................................................MAY 11/99

2-27 ..................................................... AUG 23/91

2-28 ..................................................... AUG 23/91

2-29 ...................................................... JUN 23/93

2-30 ...................................................... JUN 23/93

2-31 ..................................................... AUG 23/91

2-32 ..................................................... MAR 29/94

2-33 ..................................................... DEC 02/97

2-34 ......................................................MAY 11/99

2-34A ....................................................MAY 11/99

2-34B ....................................................MAY 11/99

2-35 ..................................................... MAR 04/96

2-36 .......................................................JUL 28/92

2-37 ...................................................... JUN 23/93

2-38 ...................................................... JUN 23/93

2-39 ......................................................OCT 06/00

2-40 ...................................................... JUN 23/93

2-41 ......................................................OCT 06/00

2-42 ..................................................... AUG 23/91

2-43 ..................................................... AUG 23/91

2-44 ..................................................... AUG 23/91

2-44A ....................................................OCT 06/00

2-44B ....................................................OCT 06/00

2-45 ..................................................... MAR 28/95

2-46 ..................................................... MAR 29/94

2-47 ......................................................MAY 11/99

2-48 ...................................................... JUN 02/00

2-49 ...................................................... JUN 02/00

2-50 ..................................................... AUG 23/91

3-i......................................................... DEC 09/14

3-ii ........................................................ DEC 09/14

3-1 ........................................................MAY 11/99

3-2 ........................................................MAY 11/99

3-3 ....................................................... DEC 09/14

3-4 ....................................................... DEC 09/14

3-5 ....................................................... DEC 09/14

3-6 ....................................................... DEC 09/14

3-7 ....................................................... DEC 09/14

3-8 ....................................................... DEC 09/14

3-9 ....................................................... DEC 09/14

3-10 ..................................................... DEC 09/14

3-11 ...................................................... DEC 09/14

3-12 ..................................................... DEC 09/14

3-13 ..................................................... DEC 09/14

3-14 ..................................................... DEC 09/14

3-15 ..................................................... DEC 09/14

3-16 ..................................................... DEC 09/14

3-17 ..................................................... DEC 09/14

3-18 ..................................................... DEC 09/14

3-19 ..................................................... DEC 09/14

3-20 ..................................................... DEC 09/14

3-21 ..................................................... DEC 09/14

3-22 ..................................................... DEC 09/14

3-23 ..................................................... DEC 09/14

3-24 ..................................................... DEC 09/14

3-25 ..................................................... DEC 09/14

3-26 ..................................................... DEC 09/14

3-27 ..................................................... DEC 09/14

3-28 ..................................................... DEC 09/14

3-29 ..................................................... DEC 09/14

3-30 ..................................................... DEC 09/14

3-31 ..................................................... DEC 09/14

3-32 ..................................................... DEC 09/14
0-xvii

6DC

FAA APPROVED: AUG 23/91

SA227-DC

A black bar in the margin of a revised page shows the current change. 

LIST OF REVISIONS

26

27

28

29

30

31

32

33

FAA APPROVED: AUG 19/99

Revised: DEC 07/07

LIST OF REVISIONS (continued)

Revision Revised FAA Approved

Number Pages Description of Revision Signature Date

0-iii, 0-iv, 0-xvii, 

0-xviii, and 1-22.

0-iii, 0-iv, 0-xvii, 

2-6 thru 2-8, 3-i 

and 3-4

0-iii thru 0-v, 

0-xvii, 1-ii, 1-22 

thru 1-24, 2-48, 

2-49 and 3A-9B

0-iii, 0-iv, 0-xvii, 

3-i and 3-4

0-iii, 0-iv, 0-xvii, 

2-ii, 2-39, 2-41, 

2-44A and 2-44B

0-iii, 0-v, 0-xvii, 

3A-i, 3A-3 thru 

3A-6

0-iii, 0-v, 0-vi, 

0-vii, 0-xvii, 1-i, 

1-ii, 1-4, 3A-i, 3A4, 3A-4A, and 3A4B

0-iii, 0-v, 0-xvii, 

1-4, 3A-4

Corrected typo on page 1-22.

Added Out-of-Trim Warning info 

to Sections 2 and 3.

Added Pneumatic Deicing Boots 

System information to comply 

with AD 2000-06-04.

Section 3 – Added Takeoff Warning 

(SN 902, 903, 904) info.

Added Oxygen System description 

and Oxygen Duration Tables for 

the Cargo Confi guration. Corrected 

editorial errors on pages 2-39 and 

2-41. Added two pages 2-44A and 

2-44B.

Section 3A – Added Low Fuel Pressure – Gauge Reading Below 15 psi 

and corrected editorial errors.

Section 1 – Added Fuel Balancing 

Operation to page 1-4. Section 3A 

– Added Fuel Balancing Procedure. 

Added two pages, 3A-4A and 3A4B. Moved text from 3A-4 to 3A-4B.

Section 1 – Revised Warning on 

page 1-4. Section 3A – Revised 

Warning on page 3A-4.

 Signature on File 8-19-99 

 Signature on File 2-29-00 

 Signature on File 6-2-00 

 Signature on File 7-12-00 

 Signature on File 10-6-00 

 Signature on File 10-3-01 

 Signature on File 4-5-07 

 Signature on File 12-7-07 

3-i

6DC

FAA APPROVED: AUG 23/91

Revised: DEC 09/14

EMERGENCY PROCEDURES

SA227-DC

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

Takeoff Warning (S/N 902, 903, 904) .................................................................................................... 3-4

Out-of-Trim Warning .............................................................................................................................. 3-4

Engine Failure During Takeoff – Takeoff Aborted .................................................................................. 3-4

Engine Failure During Takeoff – Takeoff Continued at or Above V1 (Dry or Wet Power) ...................... 3-6

Engine Failure During Takeoff – Takeoff Continued at or Above V1 ( Wet with Reserve Power) .......... 3-8 

Engine Failure During Flight ................................................................................................................ 3-10 

Engine - Propeller Uncoupling ..............................................................................................................3-11

Airstart ..................................................................................................................................................3-11 

Infl ight Relight ...................................................................................................................................... 3-12

Left or Right Oil Pressure Warning Light On ....................................................................................... 3-13 

Single Engine Landing......................................................................................................................... 3-13 

 Single Engine Descent ............................................................................................................... 3-13

 Single Engine Before Landing .................................................................................................... 3-13

 After Touchdown ......................................................................................................................... 3-14

Single Engine Go-Around .................................................................................................................... 3-16 

Engine Control Malfunction ................................................................................................................. 3-17

No Response to Power Lever Movement ............................................................................................ 3-17 

Battery Temperature Caution/Warning Lights On ................................................................................ 3-18 

 Amber Caution Light Illuminates ................................................................................................ 3-18 

 Red Warning Light Illuminates (Any Phase of Operations) ........................................................ 3-18

Double Generator Failure .................................................................................................................... 3-19

Double Engine Failure (Restarts/Relights Unsuccessful) .................................................................... 3-19

Total Electrical Failure ......................................................................................................................... 3-20 

Smoke In Aircraft ................................................................................................................................. 3-20 

Wheelwell and Wing Overheat Warning Light On ............................................................................... 3-21 

 Steady Light ................................................................................................................................ 3-21 

 Flashing Light ............................................................................................................................. 3-22 

Cabin Pressurization Malfunctions ...................................................................................................... 3-22 

 Low Cabin Pressure ................................................................................................................... 3-22 

 High Cabin Pressure .................................................................................................................. 3-22 

 Excessive Rate of Pressurization ............................................................................................... 3-23 

Emergency Descent Procedure........................................................................................................... 3-23 

Cargo or Cabin Door Warning Light On .............................................................................................. 3-24

Left or Right Hydraulic Pressure Warning Light On ............................................................................. 3-25 

Hydraulic System Failure..................................................................................................................... 3-25 

 Manual Gear Release System .................................................................................................... 3-25 

 Partial Flap Landings .................................................................................................................. 3-25 

Landing Gear Emergency Extension ................................................................................................... 3-26 

Gear Up Landings ............................................................................................................................... 3-27 

 Landing with All Three Gear Up .................................................................................................. 3-28 

 Landing with Nose Gear Up ....................................................................................................... 3-28 

 Landing with Nose Gear and One Main Gear Extended ............................................................ 3-28
3-ii

6DC

EMERGENCY PROCEDURES FAA APPROVED: DEC 02/97

Revised: DEC 09/14

SA227-DC

TABLE OF CONTENTS (continued)

EMERGENCY PROCEDURES 

ITEM PAGE

Stabilizer Trim Malfunctions................................................................................................................. 3-29 

 Stabilizer Trim System Runaway ................................................................................................ 3-29 

 Pilot’s Trim System Inoperative .................................................................................................. 3-29 

 Copilot’s Trim System Inoperative .............................................................................................. 3-29 

 Both Pilot’s and Copilot’s Trim Systems Inoperative .................................................................. 3-30 

 Go-Around with Stabilizer Trim Inoperative ................................................................................ 3-31

Stall Avoidance System (SAS) Malfunction ......................................................................................... 3-32 

Emergency Exits.................................................................................................................................. 3-32
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-3

6DC

SA227-DC

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. Ignition Switch (affected engine) .............................................................................................. OFF 

 10. 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) ........................................................................................... OFF 

 8. Ignition Switch (affected engine) .............................................................................................. OFF 

 9. Power Levers ..........................................................................................................AS REQUIRED

NOTE

The SAS advancement circuit is active only when both power 

levers are advanced. 

 

 *10. Bleed Air (operating engine) ...................................................................................AS REQUIRED 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
3-4

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

ENGINE FIRE IN FLIGHT (continued)

NOTE

If the max continuous power limit is not being developed and 

bleed air is on, increased power may be obtained by selecting 

bleed air off.

 11. Trim .........................................................................................................................AS REQUIRED 

 12. Generator (operating engine) ...................................................................... 300 AMPS MAXIMUM

 *13. Propeller Synchrophaser Switch (if installed) .............................................TAKEOFF & LANDING

 14. Reserve Power (if installed) ....................................................................................AS REQUIRED

TAKEOFF WARNING (S/N 902, 903, 904)

 AURAL TAKEOFF WARNING .........................................................................ABORT TAKEOFF

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 ight idle 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. 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-5

6DC

SA227-DC

ENGINE FAILURE DURING TAKEOFF – TAKEOFF ABORTED (continued)

 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 

 f. Ignition switch .................................................................................................................... OFF 

 7. CAWI/RES PWR Switch (If Installed) ...................................................................................... OFF

OR

 Water Injection Switch (If Installed) ......................................................................................... OFF 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
3-6

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

ENGINE FAILURE DURING TAKEOFF – TAKEOFF CONTINUED AT OR ABOVE V1 (DRY OR WET 

POWER)

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. TAKEOFF POWER SETTING ............................................................................................CHECK

NOTE

• In the event of an engine failure and an NTS system and/or 

feather valve malfunction, setting the power lever fully forward 

will drive the propeller blades toward the feathered position 

(Beta Follow-up), yielding a lower windmilling propeller drag.

• If an uncommanded and uncontrolled increase in engine torque 

and EGT occurs, which does not respond to power lever inputs, 

shutdown the affected engine as soon as possible consistent with 

the safe operation of the aircraft. Refer to Manufacturer's Data 

discussion on Uncommanded Engine Acceleration.

2. VR SPEED ........................................................................................................................ ROTATE

(CLIMB AT V2 SPEED) 

*3. LANDING GEAR (after lift-off) ..................................................................................................UP

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.

 

*4. ENGINE STOP AND FEATHER CONTROL (failed engine) ................................................ PULL 

 5. FLAPS (at acceleration altitude and V2 +5 KIAS) ...................................................................UP 

 6. MAX CONTINUOUS POWER (at VYSE) ................................................................................. SET

(CLIMB AT VYSE) (SEE FIG 4F-1 OR 4F-2) 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-7

6DC

SA227-DC

ENGINE FAILURE DURING TAKEOFF – TAKEOFF CONTINUED AT OR ABOVE V1 (DRY OR WET 

POWER) (continued)

NOTE

• During continued takeoff with wet power, use of CAWI may be 

continued during climb at VYSE. However, the 5 minute limit 

for wet power should not be exceeded.

• If bleed air is on and max continuous power limit is not being 

achieved, increased power may be obtained by turning bleed 

air off. 

 7. 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 

 f. Ignition switch .................................................................................................................... OFF 

 8. Trim .........................................................................................................................AS REQUIRED 

 9. Generator (operating engine) ...................................................................... 300 AMPS MAXIMUM

 *10. Propeller Synchrophaser Switch (if installed) .............................................TAKEOFF & LANDING 

 11. CAWI/RES PWR Switch (If installed) .....................................................................AS REQUIRED

OR

 Water Injection Switch (If installed) .........................................................................AS REQUIRED

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
3-8

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

ENGINE FAILURE DURING TAKEOFF – TAKEOFF CONTINUED AT OR ABOVE V1 (WET WITH RESERVE POWER)

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. TAKEOFF POWER SETTING ............................................................................................CHECK

ENGINE FAILURE DURING TAKEOFF – TAKEOFF CONTINUED AT OR ABOVE V1 (WET WITH RESERVE POWER) (continued)

NOTE

• In the event of an engine failure and an NTS system and/or 

feather valve malfunction, setting the power lever fully forward 

will drive the propeller blades toward the feathered position 

(Beta Follow-up), yielding a lower windmilling propeller drag.

• If an uncommanded and uncontrolled increase in engine torque 

and EGT occurs, which does not respond to power lever inputs, 

shutdown the affected engine as soon as possible consistent with 

the safe operation of the aircraft. Refer to Manufacturer's Data 

discussion on Uncommanded Engine Acceleration.

2. VR SPEED ........................................................................................................................ ROTATE

(CLIMB AT V2 SPEED)

*3. LANDING GEAR (after lift-off) ................................................................................................. UP

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.

 

*4. ENGINE STOP AND FEATHER CONTROL (failed engine) ................................................ PULL

 5. FLAPS (at acceleration altitude and V2 +5 KIAS) ...................................................................UP 

 6. CAWI/RES PWR SWITCH (at VYSE) ..............................................................................RES PWR

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-9

6DC

SA227-DC

ENGINE FAILURE DURING TAKEOFF – TAKEOFF CONTINUED AT OR ABOVE V1 (WET WITH 

RESERVE POWER) (continued)

NOTE

During continued takeoff with wet power, use of CAWI may be continued during climb at VYSE. However, the 5 minute limit for wet 

power should not be exceeded.

7. RESERVE POWER TORQUE (at VYSE) ................................................................................. SET

(CLIMB AT VYSE) (SEE FIG 4E-2)

NOTE

Use of Reserve Power imposes certain time and cycle penalties 

on the engines. (See page 1-6.) 

 8. 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. Ignition switch .................................................................................................................... OFF 

 9. Trim .........................................................................................................................AS REQUIRED 

 10. Generator (operating engine) ...................................................................... 300 AMPS MAXIMUM

 *11. Propeller Synchrophaser Switch (if installed) .............................................TAKEOFF & LANDING 

 12. CAWI/RES PWR Switch .........................................................................................AS REQUIRED

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
3-10

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

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 

 f. Ignition switch .................................................................................................................... OFF 

 3. Power Levers ..........................................................................................................AS REQUIRED

 *4. Bleed Air (operating engine) ...................................................................................AS REQUIRED 

NOTE

• If the max continuous power limit is not being developed and 

bleed air is on, increased power may be obtained by selecting 

bleed air off. 

• If an uncommanded and uncontrolled increase in engine torque 

and EGT occurs, which does not respond to power lever inputs, 

shutdown the affected engine as soon as possible consistent 

with the safe operation of the aircraft. Refer to Manufacturer's 

Data discussion on Uncommanded Engine Acceleration.

• Enhanced performance may be obtained by selecting Reserve 

Power (if installed). Ensure RPM is at 100%. Certain limitations 

apply to its use (see page 1-6). En route single engine driftdown 

performance is presented in Manufacturer's Data (see page 6A-5).

 5. Trim .........................................................................................................................AS REQUIRED 

 6. Generator (operating engine) ...................................................................... 300 AMPS MAXIMUM

 *7. Propeller Synchrophaser Switch (if installed) .............................................TAKEOFF & LANDING

 8. Reserve Power (if installed) ....................................................................................AS REQUIRED 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-11

6DC

SA227-DC

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 INSTRUMENTS 

OR EXCESSIVE VIBRATION, AN AIRSTART SHOULD NOT BE 

ATTEMPTED. AIRSTART FOLLOWING INTENTIONAL ENGINE 

SHUTDOWN IS COVERED IN SECTION 3A, ABNORMAL PROCEDURES. 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
3-12

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

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 AGGRAVATE THE CONDITION. 

 

 1. Power Lever .......................... APPROXIMATELY 1/4 INCH (6 mm) FORWARD OF FLIGHT IDLE

(UNTIL LANDING GEAR WARNING HORN IS SILENCED) 

 2. Speed Lever .................................................................................... APPROXIMATELY 97% RPM 

 3. Airspeed ......................................................................................... BETWEEN 180 AND 100 KIAS 

4. Engine Start Button ............................................................................................................. PRESS

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. 

 5. EGT ......................................................................................................... MONITOR (770oC MAX) 

 6. RPM ............................................................................................................................ STABILIZED 

 7. SRL OFF Light ............................................................................................................CHECK OFF 

 8. Power .........................................................................................................RESET AS REQUIRED

NOTE

Engine relight should be expected to occur automatically if the 

Ignition Switch is in AUTO and fuel is available at the igniters. 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-13

6DC

SA227-DC

LEFT OR RIGHT OIL PRESSURE WARNING LIGHT ON

If low oil pressure is confi rmed by the oil pressure gauge, the engine should be shut down by 

applying the Engine Failure During Flight checklist.

If the oil pressure gauge indicates normal pressure (70 – 120 PSI) monitor engine parameters. However, 

if any abnormal indications appear (i.e. uncommanded RPM fl uctuations, rising oil temperatures, etc.), 

shut down the engine by applying the Engine Failure In-Flight checklist.

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.

SINGLE ENGINE DESCENT

 1. Altimeters ..................................................................................................................................SET

 2. Cabin Pressurization .................................................................................................................SET

NOTE

Set cabin altitude and rate controls to insure zero cabin differential 

at touchdown.

 *3. Cabin Signs ............................................................................................................AS REQUIRED

 4. Fuel Quantity/Balance ........................................................................................................CHECK

NOTE

If excess fuel imbalance is indicated by fuel quantity gauge and/or 

aileron trim position, balance fuel by utilizing the fuel crossfl ow.

 5. Fuel Crossfl ow Valve ........................................................................................................CLOSED

 6. Electrical Load ......................................................................TURN OFF NONESSENTIAL ITEMS

 7. Ice Protection Systems/Ignition Switches ...............................................................AS REQUIRED

 8. Exterior Lights .........................................................................................................AS REQUIRED

SINGLE ENGINE BEFORE LANDING

 1. Landing Data .......................................................................................CONFIRM/MARKERS SET

NOTE

Compute landing distance by adding 66% to two engine landing 

distance shown in Figure 4G-4.

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
3-14

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

SINGLE ENGINE LANDING (continued)

SINGLE ENGINE BEFORE LANDING (continued)

 2. Exterior and Interior Lights ......................................................................................AS REQUIRED

 3. Speed Lever (operating engine) ............................................................................................ HIGH

 4. Flaps ..................................................................................... 1/4 (UNTIL LANDING IS ASSURED)

NOTE

Flaps should be set at 1/4 until landing is assured. 1/4 fl ap approach 

speed is approximately 10 KIAS greater than full fl ap approach speed. 

After landing is assured, full fl aps should be lowered and the aircraft 

slowed to the two engine approach speed shown in Figure 4G-4.

 5. Landing Gear, Hydraulic Pressure, and Indicators ................................................ DOWN/CHECK

 6. Nose Wheel Steering ..........................................................................................................CHECK

NOTE

Press the NWS power lever button momentarily to check that 

the NWS light comes on, verifying normal system operation prior 

to touchdown. 

 7. Ice Protection Systems/Ignition Switches/Bleed Air Switch ....................................AS REQUIRED

NOTE

Turn engine anti-ice and/or bleed air off as required to achieve 

single engine go-around performance (Figure 4G-1, 4G-2 or 4G-3).

AFTER TOUCHDOWN

 1. Brakes .....................................................................................................................AS REQUIRED 

 2. Nose Wheel Steering ..............................................................................................AS REQUIRED 

 3. 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 ight idle to 

ground idle will cause the airplane to yaw toward the operating engine. 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-15

6DC

SA227-DC

SINGLE ENGINE LANDING (continued)

AFTER TOUCHDOWN (continued)

 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. 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
3-16

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

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.

CAUTION

• THE FOLLOWING PROCEDURE ASSUMES THAT THE 

SINGLE ENGINE GO-AROUND BEGINS WITH GEAR DOWN, 

FLAPS NO MORE THAN 1/4 DOWN, AND AIRSPEED AT OR 

HIGHER THAN APPROACH SPEED.

• PERFORMANCE AND CONTROL LIMITATIONS WITH GREATER THAN 1/4 FLAPS AND/OR GEAR DOWN MAY PRECLUDE 

SUCCESSFUL SINGLE ENGINE GO-AROUND. 

• MAXIMUM LANDING WEIGHT DETERMINED IN ACCORDANCE WITH FIGURE 4G-1, 4G-2 OR 4G-3 INSURES A SINGLE 

ENGINE CLIMB GRADIENT OF AT LEAST 2.1% WITH FLAPS 

1/4, GEAR UP, AND TAKEOFF POWER AT A SPEED DETERMINED FROM FIGURE 4G-4.

 1. CAWI/RES PWR Switch (if installed) ......................................................................AS REQUIRED

 2. Power ....................................................................TAKEOFF (DRY OR WET) OR AS REQUIRED

NOTE

Operation with takeoff power is limited to fi ve minutes.

 

 3. Landing Gear ..............................................................................................................................UP

NOTE

Climb at two engine (full fl ap) approach speed.

 

 4. Flaps (Clear of Obstacles and Approach Speed +5 KIAS) .........................................................UP 

 5. Airspeed .................................................................................................................................. VYSE 

(SEE FIGURE 4F-1 OR 4F-2)

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-17

6DC

SA227-DC

SINGLE ENGINE GO-AROUND (continued)

NOTE 

VYSE is approximately 18 KIAS greater than approach speed. 

 6. CAWI/RES PWR Switch (if installed) .....................................................................AS REQUIRED

 7. Max Continuous Power (Climb at VYSE) ..................................................................................SET

ENGINE CONTROL MALFUNCTION

Upon 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. 

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 PT2 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

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
3-18

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

BATTERY TEMPERATURE CAUTION / WARNING LIGHTS ON

NOTE

• The amber caution light illuminates if either battery temperature 

reaches 120o. 

• The red warning light illuminates if either battery temperature 

reaches 150o. 

AMBER CAUTION LIGHT ILLUMINATES 

 

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

NOTE

Either obtain GPU or wait until the batteries have cooled.

 

 2. After Engine Start ............................................................. MONITOR BATTERY TEMPERATURE

INDICATOR AND GENERATOR LOADS 

 3. Temperature Increasing to 140oF ................................................................... DO NOT TAKE OFF 

 4. Temperature Increasing Above 140oF ........................................................ 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.

NOTE

A battery temperature red warning light caused by a thermal runaway 

may sometimes be verifi ed by observing sustained and excessively 

high generator loads when the affected battery switch is on.

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-19

6DC

SA227-DC

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) 16,000 14,000 12,000 10,000

 AIRSPEED (KIAS) 160 150 140 130

NOTE

• Best glide airspeed is approximately 1.5 V/VS on the SAS 

indicator.

• Glide ratio at best glide airspeed is approximately 10:1 

(2NM/1,000 FT AGL).

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 suffi cient hydraulic pressure to operate the fl aps.

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
3-20

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

TOTAL ELECTRICAL FAILURE

 1. Entrance Light Switch .............................................................................................AS REQUIRED

NOTE

The pilot's overhead and entrance door fl ood lights are battery powered when the entrance light switch is in its ON position.

 2. Standby Instrument Power Switch .............................VERIFY ARMED/STBY POWER LIGHT ON

 3. Standby Attitude Indicator, Airspeed Indicator & Altimeter ..........VERIFY POWERED & LIGHTED

 4. Avionics Aux Power Switches (if installed) ................................................................................ON

 5. Both Battery and Both Generator Switches ............................................................................. OFF

 6. Battery Switches (Individually) ...................................................................................... RESET/ON

 7. 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 Series Commuter Category 

Maintenance Manual, Chapter 05 and the TPE 331 Maintenance Manual, Chapter 72.

SMOKE IN AIRCRAFT

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 CONTINUES,

 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 

outfl ow valve would then close in order to retain cabin differential 

pressure and the existing smoke would be trapped until depressurizing procedures are begun.

 4. If Smoke in Rear of Aircraft .....................USE MANUAL PRESSURIZATION AND SELECT FULL

 DECREASE. WHEN PRESSURE DIFFERENTIAL 

IS ZERO, ACTIVATE CABIN DUMP SWITCH

 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-21

6DC

SA227-DC

SMOKE IN AIRCRAFT (continued)

*5. If Smoke is in Cockpit ..............................................................ACTIVATE CABIN DUMP SWITCH 

 6. Emergency Descent ...............................................................................................AS REQUIRED 

 7. Airspeed .........................................................................................................175 KIAS MAXIMUM 

 8. Landing Gear ....................................................................................................................... DOWN 

 *9. Fresh Air Fan ................................................................................................................OVERRIDE 

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 prevent 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 

verifi ed that the fi re has been extinguished following fi re suppression and/or smoke evacuation procedures, land immediately at the 

nearest suitable airport.

 

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 ................................................................................................................. DOWN

 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 BE SHUT DOWN. 

THE LANDING GEAR MAY HAVE TO BE RETRACTED TO SUSTAIN FLIGHT UNTIL ARRIVING AT A SUITABLE LANDING FIELD. 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
3-22

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

WHEELWELL AND WING OVERHEAT WARNING LIGHT ON (continued)

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. 

CABIN PRESSURIZATION MALFUNCTIONS

LOW CABIN PRESSURE

The cabin altitude warning light illuminates when the cabin pressure is equivalent to a pressure altitude 

between 9,500 feet and 10,000 feet. Check cabin altitude, differential pressure and controller setting, 

cabin dump switch, and CAWI/water injection switch. If the cabin pressurization controller is not providing 

proper cabin pressure, change to manual operation. If the desired cabin altitude or differential pressure 

still cannot be attained, an excessive leak exists and it may be necessary to descend or use oxygen. 

HIGH CABIN PRESSURE

If the cabin differential pressure exceeds the normal limit of 7.0 psi (48.3 kPa), the cabin pressurization controller may have failed and allowed the outfl ow valve to close. Open the manual control 

valve approximately 1/2 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 (50 kPa). Prior to landing, the cabin pressure differential must be eliminated by use of the manual 

control or the following alternate procedure: 

 1. Altitude ......................................................................................................... BELOW 12,000 FEET 

 *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 signifi cant cabin pressure differential 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 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. 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-23

6DC

SA227-DC

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 accomplished:

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

 If Step 1 eliminates the excessive rate of pressurization, determine the source of the malfunction 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 signifi cant cabin pressure differential 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 pressure differential 

is less than 1 psi or when other methods of pressure differential 

control are ineffective.

EMERGENCY DESCENT PROCEDURE 

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

1. CREW OXYGEN MASKS ...................................................................................................... DON

 *2. PASSENGER OXYGEN CONTROL ......................................................................................... ON 

 3. PASSENGER OXYGEN MASKS ........................................................................................... DON 

 4. Speed Levers ................................................................................................................ HIGH RPM 

 5. Power Levers .............................................................................................................FLIGHT IDLE 

 6. Airspeed .........................................................................................................175 KIAS MAXIMUM 

 7. Landing Gear ....................................................................................................................... DOWN 

 8. Flaps ............................................................................................................................. ONE-HALF 

 9. Altitude ....................................................................................................................AS REQUIRED 

NOTE

• A pitch attitude of approximately 11 degrees nose down will 

allow the airplane to stabilize very close to the gear limit speed 

of 175 KIAS in the 1/2 fl aps confi guration.

• This procedure results in a descent from 25,000 feet to 15,000

 feet within three minutes when initiated from cruise power and 

airspeed. 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
3-24

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

CARGO OR CABIN DOOR WARNING LIGHT ON

An illuminated CABIN DOOR or CARGO DOOR red warning light indicates that the affected door is 

not closed securely and may not be safe for fl ight. All door latches must extend fully and engage the 

door latch switches in order to extinguish the door warning lights. In addition, the cargo door handle 

must be in its fully closed position for that warning light to go out. Maladjusted door latch switches may 

cause nuisance illumination of either of the door warning lights. This problem typically occurs 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 defl ate, the door latch to seat 

the switch, and the warning light to go out. 

EITHER DOOR WARNING LIGHT ON

(DURING GROUND OPERATIONS)

 Do not take off. 

(INITIAL PART OF TAKEOFF ROLL)

 Takeoff ................................................................................................................................ ABORT

(FINAL PART OF TAKEOFF ROLL)

 1. Takeoff ..........................................................................................................................CONTINUE 

 *2. Bleed Air Switches ................................................................................................................... OFF 

 3. Crew and Passengers ........................................................ KEEP CLEAR OF AFFECTED DOOR 

 4. Land as soon as practicable. 

(DURING FLIGHT)

 1. Seat Belt Signs .......................................................................................................................... ON 

 2. Crew and Passengers ........................................................ KEEP CLEAR OF AFFECTED DOOR 

 3. Cabin Differential Pressure ...................................................................................REDUCE UNTIL

WARNING LIGHT GOES OUT 

 4. Descent ...................................................................................................................AS REQUIRED 

 5. Land as soon as practicable. 

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-25

6DC

SA227-DC

LEFT OR RIGHT HYDRAULIC PRESSURE WARNING LIGHT ON

If normal pressure is indicated (1700 – 2100 PSI) continue normal operation. No further in-fl ight action 

required.

If an abnormally low pressure is indicated and/or both HYDR PRESS lights are illuminated, assume a 

hydraulic system failure.

CAUTION

DO NOT CLOSE THE HYDRAULIC SHUT OFF VALVE(S) EXCEPT 

FOR ENGINE FIRE.

HYDRAULIC SYSTEM FAILURE 

In case of hydraulic system failure: 

1. Prepare for emergency extension of the landing gear. 

2. Prepare for landing with existing wing fl aps confi guration. 

3. Ensure that the nose wheel steering arm switch is turned off and remains off. 

WARNING

IN THE EVENT OF A HYDRAULIC SYSTEM MALFUNCTION, THE 

NOSE WHEEL STEERING SYSTEM MUST NOT BE ARMED. 

STEER WITH BRAKES, POWER, AND RUDDER. 

MANUAL GEAR RELEASE SYSTEM

An emergency hand pump and a cable operated manual release system are provided to extend the 

landing gear in the event of a hydraulic system failure. A stand pipe system in the hydraulic reservoir 

provides a supply of fl uid for hand pump operation. The manual release system also permits free fall 

gear extension in the event that all hydraulic fl uid is lost. 

PARTIAL FLAP LANDINGS

There are no provisions to extend or retract the fl aps following a hydraulic system failure. Landing approach should be made at approximately 1.3 VS1 for the existing confi guration. 

APPROACH SPEEDS (KIAS)

 WEIGHT (1,000 POUNDS)

 10.0 10.5 11.0 11.5 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5 16.0

 1/2 FLAPS 103 105 107 108 110 111 113 114 116 118 119 121 122

 1/4 FLAPS 108 110 112 113 115 116 118 120 121 123 125 127 128

 NO FLAPS 110 112 114 116 118 120 122 124 126 128 130 132 134

Compute fl aps up landing distances by adding 72 % to the landing distance shown in Figure 4G-4.

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
3-26

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

LANDING GEAR EMERGENCY EXTENSION

 1. Airspeed .........................................................................................................175 KIAS MAXIMUM 

 2. Landing Gear Handle ........................................................................................................... DOWN 

 *3. Emergency Release Lever ........................................................................................ROTATE AFT 

 *4. Hand Pump Valve Handle .............................................. PULL PIP PIN/ROTATE VALVE HANDLE 

90o FORWARD 

 *5. Emergency Hand Pump ...............................................................................PUMP AS REQUIRED 

 Gear indicator .................................................................................ALL DOWN AND LOCKED 

NOTE

• Strong resistance to pump handle motion gives suffi cient pressure 

(500 to 800 psi) to insure gear security in addition to the mechanical downlocks.

• 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 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.

If the 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.

FAA APPROVED: AUG 23/91

Revised: DEC 09/14
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-27

6DC

SA227-DC

LANDING GEAR EMERGENCY EXTENSION (continued)

 2. Use full fl aps and slow the 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.) 

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 regarding 

bracing position and evacuation procedure. 

• Depressurize airplane and consider removal and secure 

stowage of escape hatches prior to landing. Expect the entrance 

door to operate normally with the exception that it will not open 

fully after landings with the nose or left main 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 contacting 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. When a 

propeller is feathered with fl ight idle power set, drag will be reduced 

and gliding distances increased slightly. 

FAA APPROVED: DEC 09/14
3-28

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

GEAR UP LANDINGS (continued)

LANDING WITH ALL THREE GEAR UP:

 1. Use full fl aps.

 2. Approach the runway at normal approach speed plus 5 to 10 KIAS. 

 

 3. Do not feather propellers until landing on the runway is assured. 

 

 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 centerline. Use rudder for directional 

control. 

LANDING WITH NOSE GEAR UP: 

 

 1. Use normal approach technique and fl ap confi 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 and use procedure for landing with all gear up. 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. 

 

 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 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. 

FAA APPROVED: DEC 09/14 
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-29

6DC

SA227-DC

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. MASTER DISCONNECT BUTTON ................................................................ PRESS AND HOLD

 2. TRIM SELECTOR ...............................................................................OFF (CENTER POSITION)

3. Master Disconnect Button ...............................................................................................RELEASE

 4. Trim Selector ....................................................................OPPOSITE POSITION FROM WHERE

MALFUNCTION OCCURRED 

 5. Retrim as required. 

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 

FAA APPROVED: DEC 09/14
3-30

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

STABILIZER TRIM MALFUNCTIONS (continued)

BOTH PILOT’S AND COPILOT’S TRIM SYSTEMS INOPERATIVE

 1. Trim Selector .................................................................................................... OFF (CENTERED) 

 2. Airspeed ............................................. AS REQUIRED TO MAINTAIN LOW ELEVATOR FORCES 

 3. SAS Servo Switch .................................................................................................................... OFF 

NOTE

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

do not extend fl aps unless required for landing because of the 

subsequent 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 VFE) 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. 

FAA APPROVED: DEC 09/14 
FAA APPROVED: AUG 23/91 EMERGENCY PROCEDURES 3-31

6DC

SA227-DC

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

FAA APPROVED: DEC 09/14
3-32

6DC

EMERGENCY PROCEDURES FAA APPROVED: AUG 23/91

SA227-DC

STALL AVOIDANCE SYSTEM (SAS) MALFUNCTION – NOSE DOWN (INADVERTENT PUSH)

In the event of a nose down (inadvertent push) SAS malfunction the following procedure should be 

initiated:

1. MASTER DISCONNECT BUTTON ..................................................................... PRESS & HOLD

 2. SAS SERVO SWITCH ............................................................................................................. OFF

 3. Master Disconnect Button ...............................................................................................RELEASE

WARNING

PULL FORCES REQUIRED TO OVERPOWER THE STICK PUSHER 

MAY EXCEED 60 POUNDS.

CAUTION

WITH THE SAS SERVO TURNED OFF, THE STICK PUSHER WILL 

BE INOPERATIVE. STALL WARNING WILL STILL BE PROVIDED 

BY ACTIVATION OF THE STICK SHAKERS 5 TO 10 KNOTS ABOVE 

STALL SPEED. ANGLE OF ATTACK SHOULD BE IMMEDIATELY 

REDUCED TO PROVIDE AN ADEQUATE MARGIN ABOVE STALL 

SPEED. IF ANGLE OF ATTACK IS INADVERTENTLY ALLOWED TO 

INCREASE, STALL RECOVERY SHOULD BE INITIATED AT THE 

FIRST NATURAL OR SAS INDICATION OF STALL (GLARESHIELD 

STALL LIGHT AND/OR STALL HORN).

EMERGENCY EXITS

There are two emergency exits on the right side of the center cabin and one emergency exit on the left 

side. To open the emergency exits: 

 1. Cabin .................................................................................................................. DEPRESSURIZE 

 2. Release Handle ......................................................................................................................PULL 

NOTE

Pull hatch inward, rotate, extend through opening, and discard outside 

the airplane when on the ground. Ensure that the hatch is clear of 

the exit route from the airplane.

FAA APPROVED: DEC 09/14