Chinook CH-47/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: Procedure:

4.6 FADEC Failures

Indications: Procedure:

4.7 Generator Failures

Indications: Procedure:

4.8 FC Hydraulic Failures

Indications: Procedure:

4.9 Utility Hydraulic Failures

Indications: Procedure: