Loss of Tail Rotor Control
WARNING
*1. Collective/airspeed — Adjust as required to control yaw.
WARNING
If the tail rotor control cables are damaged, the hydraulic transients associated with switching the TAIL SERVO switch from NORM to BKUP may cause catastrophic damage to the tail rotor controls.
Land As Soon As Possible
Execute a landing at the first site at which a safe landing can be made
Unusual vibration on deck
*1. Collective - Lower.
*2. PCL - OFF.
*3. Rotor brake - Apply as required.
APU FIRE
*1. APU T-handle - Pull
*2. Confirm fire
*3 FIRE EXTGH switch - RESERVE ( MAIN if required and available)
If airborne and fire continues:
*4. Land immediately
If fire appears extinguished:
*5. Land as soon as possible
If on ground:
*6. Fire extinguisher - As required
Single-Engine Failure in Flight
*1. Engine Malfunction in Flight emergency procedure — Perform.
Consideration should be given to performing the following:
Tail/Intermediate Transmission Malfunction
If failure is imminent:
*1. Land immediately.
If failure is not imminent:
*2. Land as soon as possible.
WARNING
Note
An INT XMSN OIL HOT or TAIL XMSN OIL HOT caution occurring simultaneously with a WCA MISCOMPARE alert may be an indication of a mission computer/backup computer card failure.
Land as soon as practicable
Extended flight is not recommended. The landing site and duration of flight is at the discretion of the PIC.
(#1/#2) Fuel Filter Bypass or (#1/#2) Fuel Press
*1. Fuel selector lever (affected engine) - XFD (DIR if currently in XFD).
Main Transmission Malfunction
WARNING
Possible indications of main transmission imminent failure may include: yaw attitude excursions with no control input, an increase in power required for a fixed collective setting, failure of a main generator or hydraulic pump, increased noise, increased vibration levels, or abnormal fumes in the cabin.
If failure is imminent:
*1. Land immediately.
If secondary indications are present:
*2. Land as soon as possible.
If no secondary indications are present:
WARNING
Operation of the main gearbox with no oil pressure may result in failure of the tail rotor drive takeoff pinion gear and subsequent loss of tail rotor drive.
Note
Underwater Egress
*1. Emergency breating decive - As required
*2. Cords - Disconnect
*3. Door/window - Open/Jettison.
*4. Place hand on known reference point.
*5. Harness - Release
*6. Exit helicopter
After egress:
*7. Swim clear of helicopter and inflate LPU.
Boost Servo Hardover
*1. PAC call — “BOOST, BOOST, BOOST”.
*2. SAS/BOOST pushbutton — Off.
Caution
Abort Start
To abort start:
*1. PCL - OFF
*2. ENGINE IGNITION switch - OFF
If engine oil pressure is indicated:
APU Emergency Start
*1. ECS - OFF
2* - AIR SOURCE ECS/START switch - APU
3*. FUEL PUMP switch - APU BOOST
*4. APU CTRL switch - ON
*5. APU GENERATOR - ON.
1 Primary Servo or #1 Transfer Module Leak
*1. SERVO switch — 1ST OFF.
*2. Land as soon as practicable.
If the BACK UP RSVR LOW caution also appears or the backup pump fails:
*3. Land as soon as possible.
Note
Be prepared for loss of tail rotor control.
If the #2 PRI SERVO PRESS caution and/or HYD warning appears:
*4. Land immediately.
WARNING
Failure to ensure BACKUP HYD PMP switch is in AUTO or ON position prior to landing with a #1 RSVR LOW or #1 HYD PUMP caution present will result in loss of tail rotor directional control when the weight on wheels switch is activated.
Smoke and Fumes elimination
*1. Airspeed - adjust as required
*2. Doors/windows/vents - Open
*3. Aircraft - Yaw, as required.
Engine Torque or TGT Spiking/Fluctuations
If an engine instrument is spiking/fluctuating and inducing secondary indications in Ng, Np, and/or Nr:
*1. Engine Malfunction in Flight emergency procedure — Perform.
If fuel contamination is suspected:
*2. Land as soon as possible.
WARNING:
PCL movement during engine fluctuations may precipitate an engine failure. Consider performing APU Emergency Start procedure prior to manipulating the PCL. Maintaining a low power setting when moving the PCL will minimize the Nr decay rate if the malfunctioning engine fails.
If engine electronic circuitry is suspected:
If fluctuations persist:
If an engine instrument is spiking/fluctuating with
no secondary indications:
Compressor Stall
*1. Engine Malfunction in Flight emergency procedure — Perform.
*2. PCL (malfunctioning engine) — IDLE.
If TGT decreases and stall clears:
If stall remains cleared:
If TGT continues to rise, Ng decreases below normal idle speed, or any other malfunction is indicated:
Engine Low-Side Failure
*1. Engine Malfunction in Flight emergency procedure — Perform.
Electrical Power Failure/Dual Generator Failure
*1. Safe altitude and airspeed — Establish.
*2. Stabilator — Check position, slew as required.
WARNING
Exceeding airspeed versus stabilator angle limits may result in unrecoverable pitch angles.
Note
The stabilator position indicator will be inoperative with no power to the ac essential bus. Attempt to check visually.
*3. APU Emergency Start procedure — Perform.
*4. CMPTR PWR/RESET, SAS 1, SAS 2, TRIM, AUTO PLT, STABILATOR AUTO CONTROL pushbuttons — On.
If ac electrical failure:
If dc electrical failure:
If ac and/or dc electrical power is not restored:
Immediate Landing/Ditching (Pilot)
*1. Crew and passengers — Alert.
*2. Harness — Locked.
*3. APU Emergency Start Procedure — Perform, as required.
*4. External cargo/stores/fuel — Jettison/dump, as required.
*5. Searchlight — As required.
*6. Mayday/IFF — TRANSMIT/EMER.
In the flare:
*7. Windows — Jettison, handle reset, as required.
WARNING
After actuation, the position of the window emergency jettison handle may cause snagging of personal survival gear, impeding egress.
After landing:
*7. PCLs — OFF.
*8. Rotor brake — On.
*9. Copilot collective — Stow.
*10. Pilot HCU — Stow.
After all violent motion stops:
*11. Egress.
WARNING
Unstrapping and attempting to egress before all violent motion or in-rushing water stops may result in injury or incapacitation.
Internal Engine Fire
*1. Starter - Engage. Motor Engine.
#1 FUEL FLTR BYPASS and #2 FLTR BYPASS or #1 FUEL PRESS and #2 FUEL PRESS
*1. Land as soon as possible
*2. APU Emergency Start Procedure - Perform
WARNING
Be prepared for dual-engine failure. Recommended airspeed is 80 KIAS to minimize Nr droop should dual-engine failure occur.
NOTE
Consideration should be given to performing applicable steps of the immediate Landing/Ditching emergency procedure.
Engine Malfunction During Hover/Takeoff
*1. Control Nr
*2. CONTGCYPWR switch - ON
If a suitable landing site exist or unable to transition to forward flight:
*3. Set level attitude, eliminate drift, cushion landing
If able to transition to forward flight:
*4. Engine malfunction in Flight emergency procedure - Perform.
Land immediately
Execute a landing without delay