CH9 Emergency Procedures

Question 1

Single Engine Failure

Answer 1

1. ESTABLISH SINGLE ENGINE AIRSPEED.
2. External cargo/stores – Jettison (if required.)

If continued flight is not possible:
3. LAND AS SOON AS POSSIBLE.

If continued flight is possible
4. LAND AS SOON AS PRACTICABLE.

Question 2

Dual Engine Failure

Answer 2

AUTOROTATE

Question 3

DEC / EDECU High Side Failure

Answer 3

1. ESTABLISH SINGLE ENGINE AIRSPEED
2. ENG POWER CONT lever (High Torque/TGT engine) – Retard. Maintain Torque approximately 10% below other engine.
3. LAND AS SOON AS PRACTICABLE.

If the affected engine does not respond to EPCL movement in the range between FLY and IDLE, the HMU may be malfunctioning internally.

If this occurs:
4. Perform EMER ENG SHUTDOWN (affected engine).

5; Refer to Single Engine failure emergency procedure.

Question 4

NP Increasing / Decreasing (Oscillation)

Answer 4

1. ESTABLISH SINGLE ENGINE AIRSPEED
2. Slowly retard the EPCL on the suspected engine.

If the oscillation stops and partial power flight cannot be maintained:

3. Place that engine in LOCKOUT and manually control the power.
4. LAND AS SOON AS PRACTICABLE.

If the oscillation continues:

5. Place the EPCL back to FLY and retard the EPCL of the other engine.

If partial power flight cannot be maintained:

6. Place the engine in LOCKOUT and manually control the power.
7. LAND AS SOON AS PRACTICABLE.

Question 5

DEC / EDECU Low Side Failure

Answer 5

1. Establish Single Engine Airspeed.

If partial powered flight cannot be maintained:

2. EPCL (low torque / TGT engine) – LOCKOUT. Maintain Q approximately 10% below other engine.
3. LAND AS SOON AS PRACTICABLE.

Question 6

Torque Split Between Engines 1 and 2

Answer 6

1. ESTABLISH SINGLE ENGINE AIRSPEED.

Question 7

Engine Compressor Stall

Answer 7

1. ESTABLISH SINGLE ENGINE AIRSPEED.

If condition persists:

2. EPCL - RETARD
3. EPCL - FLY

If stall condition recurs:

4. EMER ENGINE SHUTDOWN’
5. refer to single engine failure emergency procedure.

Question 8

ENG 1 OIL BYPASS or ENG 2 OIL BYPASS Caution appears

Answer 8

1. ESTABLISH SINGLE ENGINE AIRSPEED.
2. EPCL - RETARD
3. LAND AS SOON AS PRACTICABLE.

Question 9

CHIP ENG 1 or CHIP ENG 2
ENG 1 OIL PRESS or ENG 2 OIL PRESS
ENG 1 OIL HOT OR ENG 2 OIL HOT

cautions appear

Answer 9

1. ESTABLISH SINGLE-ENGINE AIRSPEED
2. EPCL - RETARD

If oil pressure is below minimum limits or if oil temperature remains above maximum limits:

3. EMER ENG SHUTDOWN
4. Refer to SE failure EP

Question 10

Engine High Speed Shaft Failure

Answer 10

1. ESTABLISH SINGLE ENGINE AIRSPEED
2. EMER ENG SHUTDOWN (affected engine). DO NOT ATTEMPT RESTART.
3. Refer to SE Failure EP

Question 11

Lightning Strike

Answer 11

1. ESTABLISH SINGLE ENGINE AIRSPEED.
2. EPCL - ADJUST (as required to control NP and NR)
3. LAND AS SOON AS POSSIBLE.

Question 12

Loss of Tail Rotor Thrust in Cruise Flight

Answer 12

1. AUTOROTATE - maintain airspeed at or above 80 KIAS

2. EPCL’s – OFF (during deceleration when intended point of landing is assured.)

Question 13

Loss of Tail Rotor Thrust or T/R QUAD FAIL caution appears with Loss of Control at Low Airspeed/Hover (Right Rotation).

Answer 13

1. Collective – Reduce

2. EPCLs – OFF (5 to 10 feet above touchdown.)

Question 14

T/R QUAD FAIL Caution appears in Cruise Flight

Answer 14

1. Collective – Adjust to determine controllability (Fixed right or left.)
2. LAND AS SOON AS PRACTICABLE.

Question 15

Loss of Control at Low Airspeed/Hover or T/R QUAD FAIL Caution Appears (Left Rotation)

Answer 15

1. EPCLs - RETARD to decrease NR below 100% and begin a partial power descent.
2. Collective – Adjust to preserve NR
3. EPCLs – OFF (5-10 feet above touchdown).
4. Collective – Adjust for landing

Question 16

Pedal Bind / Restriction or Drive with no accompanying Caution

Answer 16

1. Apply pedal force to oppose the drive.
2. Check other pedals for proper operation
3. Tail Servo switch - Backup.

If normal control is not restored:

4. Tail Servo switch - Normal
5. SAS/BOOST switch - Off

If normal control is not restored:

6. SAS/BOOST - ON
7. Collective –Adjust to determine controllability for landing.
8. LAND AS SOON AS PRACTICABLE.

Question 17

T/R Servo 1 Fail Caution Appears and the BACK UP PUMP ON Advisory Does Not Appear or T/R Servo 2 ON Advisory does NOT appear

Answer 17

Automatic switch over did not take place.

1. TAIL SERVO Switch - BACKUP.
2. Backup Hyd pump switch - ON
3. Land As Soon As Practicable.

Question 18

MAIN XMSN PRESS Caution Appears / MAIN XMSN OIL HOT Caution Appears

Answer 18

LAND AS SOON AS POSSIBLE

if time permits:
Slow to 80 KIAS
EMER APU START
GENS 1 & 2 - OFF

Question 19

CHIP L INPUT MDL or CHIP R INPUT MDL Caution Appears

Answer 19

1. ESTABLISH SE AIRSPEED
2. EPCL (affected engine) –IDLE
3. LAND AS SOON AS POSSIBLE.

Question 20

CHIP MAIN MDL SUMP
CHIP L ACC MDL 
CHIP R ACC MDL
CHIP TAIL XMSN
TAIL XMSN OIL HOT
CHIP INT XMSN
INT XMSN OIL HOT 

Cautions appear

Answer 20

LAND AS SOON AS POSSIBLE

Question 21

MAIN TRANSMISSION FAILURE

Answer 21

1. Collective - Adjust only enough to begin a descent with power remaining applied to the main transmission throughout the descent and landing.
2. LAND AS SOON AS POSSIBLE.