Chinook CH-47/Emergency Procedures

SECTION 8. EMERGENCY PROCEDURES

1 General

This section describes the most common helicopter emergencies that may be encountered in the Chinook, and the appropriate actions to address those emergencies.

2 Definitions

The following terms apply for this section:

• The term LAND AS SOON AS POSSIBLE is defined as a landing to the nearest suitable landing surface. Survival of the occupants is considered the highst priority.
• The term LAND AS SOON AS PRACTICABLE means land at the nearest suitable airfield or heliport.
• The term AUTOROTATE means adjusting the controls to establish an autorotation and landing. This generally means thurst control full down, then adjust as necessary to maintain 100% rotor RPM.

3 Emergency Warning Signals

This helicopter is equipped with a troop alarm and jump light system. The following standard signals can be used to notify occupants:

• Prepare for ditching or crash landing - 3 short rings
• Water contact - Sustained ring

4 Emergency Checklists

4.1 Dual Engine Failure

Indications:

• ENG 1 FAIL and ENG 2 FAIL caution lights
• N1 and N2 underspeed
• Engine flameout

Procedure:

1. AUTOROTATE
2. External cargo - Jettison

4.2 Engine Fire

Indications:

• FIRE PULL handle light LIT
• ENG 1 FAIL or ENG 2 FAIL caution lights
• N1 underspeed
• Engine flameout

Procedure:

1. Identify affected engine. Use caution not to shut down operating engine.
2. External cargo - Jettison
3. FIRE PULL handle - PULL
4. Affected Engine - Engine Control Lever to STOP
5. AGENT DISCH - BLT 1
6. Monitor.
7. If fire is not out: AGENT DISCH - BTL 2
8. Land as soon as possible

4.3 Engine Chip Light(s)

Indications:

• ENG 1 CHIP DETR or ENG 2 CHIP DETR caution lights

Procedure (One Engine Affected):

1. External cargo - Jettison
2. Affected Engine - Engine Control Lever to STOP
3. Land as soon as practicable

Procedure (Both Engines Affected):

1. External cargo - Jettison
2. Land as soon as possible

4.4 Engine or Transmission Warnings

Indications:

• Any of ENG 1/2 OIL LVL, ENG 1/2 XMSN HOT, XMSN OIL HOT, XMSN OIL PRESS, XMSN AUX OIL PRESS

Procedure:

1. Land as soon as possible

4.5 Fuel Level Warnings

Indications:

• L/R FUEL LVL

Procedure:

1. Check aux fuel pumps ON
2. Check aux press warning lights OFF
3. Check fuel levels
4. If no aux fuel, or insufficient fuel in main tank, land as soon as practicable

4.6 FADEC Failures

Indications:

• FADEC 1 or FADEC 2 caution lights

Procedure:

1. GEN switch - OFF, then ON

If caution light remains lit:

2. GEN switch - OFF
3. Land as soon as practicable

4.7 Generator Failures

Indications:

• NO 1 GEN and/or NO 1 GEN cautions

Procedure (single GEN failure):

1. GEN switch - OFF, then ON

If caution light remains lit:

2. GEN switch - OFF
3. Land as soon as practicable

Procedure (double GEN failure):

1. AFCS SYSTEM SEL - OFF
2. PDP gang bars - DOWN
3. Each GEN switch - OFF then ON to reset

If power is restored

1. PDP gang bars - UP
2. Land as soon as practicable

If power is not restored

1. APU - Start
2. APU GEN - ON
3. Land as soon as possible

4.8 FC Hydraulic Failures

Indications:

• HYD 1 and/or HYD 2 caution lights

Procedure (single system):

1. PWR XFER - ON (affected system)
2. FLT CONTR - to good system (if HYD light still lit)
3. AFCS - to good system (if HYD light still lit)
4. Land as soon as possible

Procedure (both systems):

1. PWR XFER - ON (both systems)
2. AFCS - OFF (if HYD lights still lit)
3. Land as soon as possible

4.9 Utility Hydraulic Failures

Indications:

• UTIL HYD SYS caution light

Procedure:

1. Land as soon as possible

4.10 Engine Restart During Flight

1. APU - Start
2. ENG COND lever - STOP then GND
3. FIRE PULL handle - IN
4. XFEED switch - as required
5. Engine Start - Perform
6. APU - OFF