TH-57 EP CMIs Flashcards
ABORT START
- Twist grip - Close
- Starter - OFF after TOT stabilizes at 400 degC or below
CAUTION: Failure to utilize a GPU/battery cart of subsequent start attempts may result in a hot start
COMPRESSOR STALL
WARNING: This emergency may result in engine failure
1. Collective - Lower
NOTE: Power reduction will often eliminate compressor stalls
2. ENG Anti-ice switch - ON
3. Cabin heat valve - ON
4. Check power available
NOTE: Power available is considered sufficient if level flight can be maintained at Nr at 90% or higher without reaggravating compressor stall.
**If power is insufficient to maintain level flight:
5. Autorotate
6. Twist grip - Flight Idle
NOTE: If some usable power exists but level flight cannot be maintained, that power, if sufficient, may be utilized to affect a landing or minimize rate of descent enroute to a suitable site for autorotation.
** If power sufficient to maintain level flight:
7. Land as soon as possible
ENGINE OVERSPEED (Nf) ROTOR RPM (Nr)
- Twist Grip - Reduce (to maintain Nf/Nr in operating range)
- Collective/Twist grip - Coordinate
- Land as soon as possible
UNDERSPEEDING Nf/Nr
WARNING: This emergency may result in engine failure
1. Collective - Lower as required to maintain minimum of 90% Nr.
2. Twist Grip - Full Open
3. GOV RPM - Full increase
** If underspeed persists:
4. Check power available
NOTE: Power available is considered to be sufficient if level flight can be maintained with Nr at 90% or higher.
** If power is not sufficient:
5. Autorotate
NOTE: If some usable power exists but level flight cannot be maintained, that power, if sufficient, may be utilized to affect a landing or minimize rate of descent enroute to a suitable site for autorotation.
** If sufficient power is available:
6. Land as soon as possible
FUEL CONTROL FAILURE
- Collective: Adjust as required to maintain Nr in operating range
- Twist Grip - Adjust as required to maintain Nf in operating range
- Land as soon as possible.
WARNING: This emergency may result in engine failure
ENGINE CHIP
WARNING: This emergency may result in engine failure
1. Check for secondary indications
** If secondary indications exist:
2. Land as soon as possible
** If no secondary’s exist, proceed as follows:
First Chip light:
3. Press CLEAR CHIP
** If ENG CHIP remains:
4. Land as soon as possible
** If ENG CHIP extinguishes:
5. Note time and continue flight
Second Chip light:
** If within 30 min of the first:
6. Land as soon as possible
** If more than 30 minutes from the first:
7. Proceed as with the first light
Any subsequent ENG CHIP caution light within 50 Hours of the first:
8. Land as soon as possible.
ENGINE RESTART IN FLIGHT
- Ng - Note
** If Ng is below 12%:
NOTE: Ng will not decrease below minimum starting speed within 10 seconds because of rotational inertia plus possible ram effect. The Twist grip can be left full open, since fuel flow during the start will be on the normal start acceleration schedule. - Twist Grip - Close
- Starter - ON
- At 12% Ng, Twist Grip - Full Open
** If Ng is 12% or above: - Starter - ON
** If light-off occurs: - At 58% Ng, starter - OFF
- Land as soon as possible
NOTE: Main Generator and BUS/TIE RELAY (C) may need to be reset
EMERGENCY SHUTDOWN
- Twist grip - Close
- Fuel Valve - OFF
- BAT Switch - OFF
(C) 4. STBY ATT IND Switch - OFF
(C) 5. Rotor Break - Engage immediately - Helicopter Egress, as required. Use fire bottle or get clear of the aircraft as applicable
WARNING: After exiting aircraft, beware of rotor blades
MAIN DRIVE SHAFT FAILURE
- Autorotate
- Twist Grip - Adjust, if necessary, to maintain Nf in operating range
WARNING: The engine must continue to operate to provide tail rotor drive. Tail authority may be lost if Nf is allowed to go below 80%
** When on deck: - Emergency shutdown - Complete
SPRAG CLUTCH SLIPPAGE
- Autorotate
- Twist Grip - FLT IDLE
** If time and altitude permit: - Twist Grip - Smoothly rotate to full open
** If Nf/Nr are married: - Collective - Increase
NOTE`: Multiple attempts to reengage the sprag clutch are permitted dependent on time and altitude
** If sprag clutch slippage continues to slip: - Autorotate
- Twist Grip - Closed
** If sprag clutch reengages: - Land as soon as possible
TRANSMISSION MALFUNCTION
** If failure is imminent:
WARNING: Possible indications od an imminent transmission failure may include yaw attitude excursions with no control input, an increase in power required for a fixed collective setting, increased noise, or increased vibration levels.
1. Land Immediately
2. Shoulder harness - Lock
** If failure is not imminent:
3. Land as soon as possible.
NOTE: Transiting as a minimum power required airspeed and low altitude may permit a quick flare and immediate landing in the event of an imminent transmission failure.
TRANSMISSION CHIP
First TRANS CHIP caution light:
1. Check for secondary indications
** If secondary indication exist:
2. Transmission malfunction Procedure - Perform
** If no secondary indications exist:
3. Press CLEAR CHIP
** If TRANS CHIP caution light remains illuminated
4. Transmission malfunction emergency procedure perform
** If TRANS CHIP light extinguishes:
5. Note the time and continue flight
Second TRANS CHIP light:
** If within 30 minutes of the first:
6. Transmission emergency procedure - Perform
** If more than 30 minutes have elapsed since the first TRANS CHIP caution light:
7. Proceed as with the first TRANS CHIP caution light
** Any subsequent TRANS CHIP caution light within 50 hours of the first:
8. Transmission malfunction Procedure - Perform.
FUEL BOOST PUMP FAILURE
- Descent - Initiate if above 6000’ PA and flight permits
- Fuel pressure and quantity - Note
WARNING: with one or both boost pumps inoperative, 10 gallons is unusable
** If both fuel boost pumps have failed (Fuel pressure at zero), or a single pump has failed (Fuel presure 4 to 30 PSI) with fuel quantity below 20 gallons:
WARNING: Dual boost pump failure may lead to engine failure. - Land as soon as possible.
SUSPECTED FUEL LEAKAGE
- Land as soon as possible
** If time and altitude permit: - Transmit position and intentions
- unnecessary electrical equipment - secure
WARNING: If an air leak exists in the fuel lines between the boost pumps and engine, turning off all electrical power could cause an engine flameout due to a total loss of boost pump pressure.
** when on deck: - Emergency shutdown - Complete
AIRFRAME FUEL FILTER CAUTION
- Land as soon as possible
WARNING: This emergency may result in engine failure
HYRDRUALIC POWER CYLINDER MALFUNCTION
- HYDRAULIC BOOST switch - OFF
WARNING: Hydraulic system will not secure it HYD BOOST circuit breaker is out and the pilot will be unable to maintain control of the aircraft. - Helicopter - Regain control
- Airspeed - Adjust (to obtain most comfortable control movement level)
- Land as soon as possible
WARNING: In the event of a complete loss of electrical power (B) or a loss of electrical power to the ESS No 2 Bus (eg failure of the Main Generator and main battery) (C), they hydraulic system will reenergize in the malfunction mode. The pilot will be unable to override the hydraulic boost solenoid.
ELECTRICAL FIRE - KNOWN ORIGIN
- Affected equipment - Secure
- Affected circuit breakers - Pull
** If fire persists: - Electrical Fire - Unknown Origin Procedure - Execute
** If fire extinguishes - Land as soon as practicable