DOUBLE ENGINE FIRE IN FLIGHT - POSITIVE FIRE
Indications:
- Sign of fire, with Fire Warn lights ON or confirmed fire.
ENGINE FIRE IN FLIGHT - POSITIVE FIRE
Indications:
- Sign of fire, with Fire Warn lights ON or confirmed fire.
SUSPECTED ENGINE FIRE
Indications:
- Fire Warn light ON
ELECTRICAL FIRE / AIRFRAME FIRE
Indications:
- Signs of fire, smoke/fumes in cabin/cockpit.
ENGINE FIRE ON THE GROUND
Indications:
- Sign of Fire, with Fire Warn light ON or confirmed fire.
POST SHUTDOWN FIRE / HOT ENGINE
Indications:
- PTIT rises above 260ºC.
- Engine smoke and/or sign of fire.
TAIL RTR DRIVE FAILURE - HOVER
Indications:
- Rapid yaw to right and loss of yaw control.
- Possible noise or vibration in the tail section.
TAIL RTR DRIVE FAILURE - FORWARD FLIGHT
Indications:
- Yaw to the right and loss of yaw control.
- Excessive noise or vibration from the tail section.
TAIL RTR CONTROL FAILURE - HOVER
Indications:
- Yaw pedals jammed/restricted.
- Aircraft fails to respond to yaw pedal movement.
- Possible uncommanded yaw.
TAIL RTR CONTROL FAILURE - FORWARD FLIGHT
Indications:
- Yaw pedals jammed/restricted
- Aircraft fails to repond to yaw pedal movements
MAIN GEARBOX CHIP WARNINGS
DOUBLE ENGINE FAILURE IN HOVER
Indications:
- NR and Nf decreases. Aircraft yaws left.
- Torque and Ng fall to zero on both engines.
- COMP caption illuminates with Ng and/ or Nf below 10 to 15%.
DOUBLE ENGINE FAILURE IN FOREWARD FLIGHT
Indications:
- NR and Nf decreases and aircraft yaws left.
- Torque and Ng fall to zero on both engines.
- COMP caption illuminates with Ng and/or Nf below 10 to 15%.
SINGLE ENGINE FAILURE IN HOVER
Indications:
- Torque, Ng and Nf fall to zero on failed engine.
- COMP caption illuminates with Ng and/or Nf below 10 to 15%.
SINGLE ENGINE FAILURE IN FORWARD FLIGHT
Indications:
- Torque, Ng and Nf fall to zero on failed engine.
- COMP caption illuminates with Ng and/or Nf below 10 to 15%.
FLUCTUATING ENGINE OIL PRESSURE
Indications:
- Engine oil pressure fluctuations at a fixed power setting with or without oil temperature rise or signs of oil leakage.
IMMEDIATE RESTART IN AUTO CONTROL
If a flameout is quickly recognized, an immediate restart may be attempted if single engine performance is critical.
IMMEDIATE RESTART IN MANUAL CONTROL
If a flameout is quickly recognized an immediate restart may be attempted if single engine performance is critical.
If engine failure was caused by OTG operation due to overspeed, restart should be done in manual control.
COMPUTER FREEZE
Indications (Affected Engine):
- Torque, Ng and PTIT remain static. COMP caption may illuminate.
- Indications (Other Engine):
- Torque, Ng and PTIT response is exaggerated for collective lever movements.
COMPUTER RUNAWAY UP
Indications:
- Tq split.
- Initial increase in NR, depending on power demanded. Increase in Ng and PTIT on affected engine which fails to respond to collective movement. Decrease in Ng and PTIT on good engine.
- With a full runaway up Ng will stabilize at approximately 106%. Irrespective of NR the affected engine Nf will remain married with NR while good engine Nf will stabilize at approximately 102%.
- COMP caption may illuminate.
COMPUTER RUNAWAY DOWN
Indications:
- Tq split.
- NR may decrease, depending on power demanded.
- Decrease in Ng and PTIT on affected engine which fails to respond to collective movement. The good engine is taking up the load and may exceed its operating limitations.
- With a full runaway down Ng stabilizes at flight idle and Nf at approximately 70%.
- COMP caption may illuminate.
COLLECTIVE ANTICIPATOR FAILURE
Indications:
- Torque split.
- Both engines respond to collective inputs;
- Collective Steady: Affected engine torque reduced, good engine torque increased.
- Collective up/down: Affected engine less responsive, good engine more responsive.
PRI OR AUX HYDRAULIC FAILURES
Indications:
- PRI HYD P or AUX HYD P illuminated.
- Pressure gauge indicates less than 1000 PSI.
- Loss of AFCS if AUX HYD P fails.
