-10 Chapter 9 Change 4 Flashcards
IMMEDIATE ACTION EMERGENCY STEPS.
NOTE
- The urgency of certain emergencies requires immediate and instinctive action by the pilot. The most important single consideration is helicopter control. All procedures are subordinate to this requirement. The MASTER CAUTION should be reset after each malfunction to allow systems to respond to subsequent malfunctions. **If time permits during a critical emergency, transmit MAYDAY call, set transponder to emergency, jettison external stores if required, turn off boost pumps, and lock shoulder harnesses. **
- During emergencies where power may not be available or operating limits may be exceeded (i.e. engine failures, decreasing NR, compressor stalls high speed shaft failures) the crew should disengage the coupled flight director to ensure that aircraft remains within operating limits.
define LAND AS SOON AS POSSIBLE
defined as landing at the nearest suitable landing area (e.g., open field) without delay. (The primary consideration is to ensure the survival of occupants.)
define **LAND AS SOON AS PRACTICABLE **
defined as landing at a suitable landing area. (The primary consideration is the urgency of the emergency.)
define AUTOROTATE
defined as adjusting the flight controls as necessary to establish an autorotational descent and landing.
EMER ENG SHUTDOWN
EP and Caution
identify the affected engine by checking ENG OUT warning lights, NP, NR, Q (torque), P (engine oil pressure), TGT, and NG.
(1. ) ENG POWER CONT lever(s) — OFF.
(2. ) ENG FUEL SYS selector(s) — OFF.
(3. ) _FUEL BOOST PUMP switch(es) — OFF. _
CAUTION
If TGT rises above 500°C after shutdown, place AIR SCE HT/START switch as required, turn ENGINE IGNITION switch OFF, and press starter to motor engine for 30 seconds or until TGT decreases below 500°C.
define LOCKOUT
defined as manual control of engine RPM while bypassing DEC/EDECU functions. Bypass of the engine control will be required when NP1 or 2 decreases below normal demand speed due to a malfunction of the DEC.
**LOCKOUT **
WARNING
Going to DEC LOCKOUT to obtain additional power does not remove Maximum Fuel Flow or NG limits. NR may still decrease below normal operating range if Maximum Fuel Flow or NG limits are reached.
**LOCKOUT **
CAUTION
When engine is controlled with ENG POWER CONT lever in LOCKOUT, engine response is much faster and TGT limiting system is inoperative. Care must be taken not to exceed TGT limits and keeping NR and NP 1 and 2 in operating range.
LOCKOUT
EP
ENG POWER CONT lever — Pull down and advance full forward while maintaining downward pressure, then adjust to set NR as required.
Engine control malfunctions can result in NR increasing or decreasing from normal demand speed. Under certain failure conditions, Q, NP, and NG may not be indicating and the possibility of the ENG OUT warning light and audio activating exists. The most reliable indication of engine power will be TGT.
**EMER APU START **
EP
(1. ) FUEL PUMP switch — APU BOOST.
(2. ) APU CONT switch — **ON. **
EMERGENCY EXITS
WARNING
For helicopters with a non-operational roll-trim actuator, the cyclic shall be continuously held while on the ground with rotor turning. In cases where emergency exit is required prior to rotor coasting to a stop, make sure that the cyclic stick is centered until the last crewmember can depart the cockpit. Since the main rotor shaft has a 3° forward tilt, an exit to the right rear or left rear will provide the greatest rotor clearance safety.
**EMERGENCY EQUIPMENT (PORTABLE) **
**Emergency equipment consists of **
two hand held fire extinguishers, one crash ax, and three first aid kits, as shown in Figure 9-1.
**ENGINE MALFUNCTION — PARTIAL OR COMPLETE POWER LOSS. **
WARNING
Single engine capability must be considered prior to movement of the engine power control lever. Prior to movement of either ENG POWER CONT lever, it is imperative that the malfunctioning engine and the corresponding ENG POWER CONT lever be identified. If the decision is made to shut down an engine, take at least five full seconds while retarding the ENG POWER CONT lever from FLY to IDLE, monitoring Q, NG, TGT, NP, and ENG OUT warning light on.
Dual-Engine Failure.
The flight characteristics and the required crewmember control responses after a dual-engine failure are similar to those during a normal power-on descent. Full control of the helicopter can be maintained during autorotational descent. In autorotation, as airspeed increases above (1)____________________________________. As airspeed decreases below (2)_____________________________________________.
(1) 70 - 80 KIAS, the rate of descent and glide distance increase significantly
(2) 64 KIAS, the rate of descent will increase and glide distance will decrease
**SINGLE-ENGINE FAILURE **
WARNING
Do not respond to ENG OUT warning and audio until checking TGT, NG, and NP1 and NP2.
SINGLE-ENGINE FAILURE
EP
-
Collective — Adjust to maintain NR
(2. ) _External cargo/stores — Jettison (if required). _ - _Establish single-engine airspeed. _
If continued flight is not possible:
- LAND AS SOON AS POSSIBLE.
If continued flight is possible:
- LAND AS SOON AS PRACTICABLE.
**ENGINE RESTART DURING FLIGHT. **
**After an engine failure in flight, an engine restart may be attempted. If it can be determined **
that it is reasonably safe to attempt a start, the APU should be used. Use of a crossbleed start could result in a power loss of up to 18% Q on the operational engine.
**DUAL-ENGINE FAILURE — GENERAL **
**The (1)_________and _________ (Figures 9-3 and 9-4) at which a two-engine failure occurs will dictate the action to be taken. After the failure, main rotor rpm will decay rapidly and the helicopter will (2)___________________. **
(1) altitude and airspeed
(2) yaw to the left
The recommended airspeed for autorotation is (1)_____. Autorotation below (2)______ is not recommended because (3)______________________________________. Adjusting the cyclic and collective control to maintain 100% NR and (4)______ KIAS (______ KIAS high drag) will result in achieving the maximum glide distance.
(1) 80 KIAS
(2) 80 knots
(3) the deceleration does not effectively arrest the rate of descent
(4) 110 KIAS, 100 KIAS HIGH DRAG
DURING AUTOROTATION
NR above 100% will result in (1)__________________________. At (2)_________ feet AGL, use aft cyclic to decelerate.
Ground contact should be made (3)_________________. Pitch attitudes up to (4)______ at the point of touchdown normally result in an adequate deceleration and safe landing.
(1) a higher rate of descent
(2) 50 to 75
(3) with some forward speed
(4) 25°
**DUAL-ENGINE FAILURE **
WARNING
Do not respond to ENG OUT warning lights and audio until checking TGT and NR.
DUAL-ENGINE FAILURE
EP
AUTOROTATE
**DECREASING NR **
WARNING
WARNING
NR can also decrease as a result of exceeding the Maximum Torque Available due to reaching TGT limiting, Maximum Fuel Flow, or NG limiting without an associated hardware failure.
Going to DEC LOCKOUT to obtain additional power does not remove Maximum Fuel Flow or NG limits. NR may still decrease below normal operating range if Maximum Fuel Flow or NG limits are reached.
DECREASING NR
CAUTION
NOTE
When engine is controlled with ENG POWER CONT lever in LOCKOUT, engine response is much faster and the TGT limiting system is inoperative. Care must be taken not to exceed TGT limits and keeping NR, NP1 and NP2 in operating range.
If NR reduces from 100% to 95-96% during steady flight, check Q1 and Q2. If Q1 and Q2 are equal and below Maximum Torque Available, attempt to increase NR with ENG SPD TRIM switch.
DECREASING NR
EP
- Collective — Adjust to control NR.
- Establish single-engine airspeed.
If single engine flight cannot be achieved or maintained:
(2. ) ENG POWER CONT lever (low Q/TGT TEMP engine) — LOCKOUT. Maintain Q approximately 10% below other engine.
3. LAND AS SOON AS PRACTICABLE.
**INCREASING NR **
EP
(1. ) ENG POWER CONT lever (high Q/TGT engine) — Retard. Maintain Q approximately 10% below other engine.
2. LAND AS SOON AS PRACTICABLE.
If the affected engine does not respond to ENG POWER CONT lever movement in the range between FLY and IDLE, the HMU may be malfunctioning internally.
If this occurs:
-
Establish single engine airspeed.
(4. ) Perform EMER ENG SHUTDOWN (affected engine).
(5. ) Refer to single-engine failure emergency procedure.
**ENGINE COMPRESSOR STALL. **
An engine compressor stall is normally recognized by (1)__________________________________. These responses are normally accompanied by the rapid increase in TGT and fluctuations in NG, Q, and NP reading for the affected engine.
(1) a noticeable bang or popping noise and possible helicopter yaw.
**ENGINE COMPRESSOR STALL **
EP
- Establish single engine airspeed.
- Collective — Reduce.
If condition persists:
(3. ) ENG POWER CONT lever (affected engine)–Retard (TGT should decrease).
(4. ) ENG POWER CONT lever (affected engine) — FLY.
If stall condition recurs:
(5. ) EMER ENG SHUTDOWN (affected engine).
(6. ) Refer to single-engine failure emergency procedure.
**ENG 1 OIL BYPASS OR ENG 2 OIL BYPASS CAUTION APPEARS. **
EP
- ENG POWER CONT lever — Retard.
- LAND AS SOON AS PRACTICABLE.
CHIP ENG 1 OR CHIP ENG 2,
ENG 1 OIL PRESS OR ENG 2 OIL PRESS,
ENG 1 OIL HOT OR ENG 2 OIL HOT
CAUTION APPEARS.
-
Establish single engine airspeed.
(2. ) ENG POWER CONT lever (affected engine) — Retard (to reduce torque).
If oil pressure is below minimum limits or if oil temperature remains above maximum limits:
(3. ) EMER ENG SHUTDOWN (affected engine).
(4. ) Refer to single engine failure emergency procedure.
ENGINE HIGH-SPEED SHAFT FAILURE
Failure of the shaft may be complete or partial. A partial failure may be characterized at first by nothing more than (1)____________________________________. A complete failure will be accompanied by a loud bang that will result in a sudden (2)___________________________________. NP of affected engine will (3)__________________________________.
(1) a loud high-speed rattle and vibration coming from the engine area
(2) Q decrease to zero on the affected engine
(3) increase until overspeed system is activated
ENGINE HIGH-SPEED SHAFT FAILURE.
EP
- Establish single engine airspeed.
-
Collective — Adjust.
(3. ) EMER ENG SHUTDOWN (affected engine).
Do not attempt to restart.
(4.) Refer to single-engine failure emergency procedure.
LIGHTNING STRIKE.
WARNING
Lightning strikes may result in loss of automatic flight control functions, engine controls, and/or electric power.
Lightning strike may cause one or both engines to (1)______________________________. Systems instruments may also be inoperative. If this occurs, the flight crew would have to adjust to the malfunctioning engine(s) ENG POWER CONT lever(s) as required to control NP and NR by (2)__________________. If practical, the pilot should reduce speed to (3)_________. This will reduce the criticality of having exactly the correct rotor speed at 100%.
(1) immediately produce maximum power with no TGT limiting or overspeed protection
(2) sound and feel
(3) 80 KIAS
LIGHTNING STRIKE.
EP
(1. ) ENG POWER CONT levers — Adjust (as required to control NP and NR).
2. LAND AS SOON AS POSSIBLE.
Loss of tail rotor thrust at (1)________ and at a (2)_______ will result in a rapid (3)______ yaw. At higher airspeed, a (4)______ yaw may develop more slowly but may continue to increase.
(1) low airspeed
(2) hover
(3) right
(4) right
FIXED PITCH MALFUNCTIONS
Seeking a headwind or (1)__________ wind crosswind component may aid in maintaining heading control for landing.
When altitude and time permit, every effort should be made to achieve level trimmed flight between (2)_____ KIAS.
(1) left quartering
(2) 25-145
**FIXED RIGHT PEDAL/DECREASED POWER **
Some conditions may require entry into autorotation to control yaw rate. If continued flight is possible, a shallow approach at about (1)______ to a roll-on landing should be made. Attempt to land with aircraft into the wind or a (2)_______ crosswind to aid in heading control. As the touchdown point is approached, a mild deceleration should be executed at about (3)______ feet to reduce airspeed to about (4)______. As collective is increased to cushion touchdown, the nose of the helicopterwill turn to the right. Careful adjustment of collective and deceleration should allow a touchdown with approximate runway alignment. Upon touchdown, lower collective carefully and use brakes to control heading.
(1) 80 KIAS
(2) left quartering
(3) 15 to 25
(4) 40 KIAS
Loss of Tail Rotor Thrust in Cruise Flight
If autorotation entry is delayed, (a)_____________ can develop causing low indicated airspeed with the (b) ___________________. This will make it more difficult to establish or maintain adequate autorotative airspeed.
EP
a) large sideslip angles
b) stabilator programming down
1. Airspeed — Adjust to 80 KIAS or above.
2. AUTOROTATE — Maintain airspeed at or above 80 KIAS.
(3. ) ENG POWER CONT levers — OFF (during deceleration when intended point of landing is assured).
Loss of Tail Rotor Thrust or T/R QUAD FAIL Caution Appears
**with Loss of Control at Low Airspeed/Hover (Right Rotation). **
EP
-
Collective — Reduce.
(2. ) ENG POWER CONT levers — OFF (5 to 10 feet above touchdown).
T/R QUAD FAIL Caution Appears in Cruise Flight.
WARNING
If the helicopter is shut down and/or hydraulic power is removed with one tail rotor cable failure, disconnection of the other tail rotor cable will occur when force from the boost servo cannot react against control cable quadrant spring tension. The quadrant spring will displace the cable and boost servo piston enough to unlatch the quadrant cable.
T/R QUAD FAIL Caution Appears in Cruise Flight.
a. Loss of one tail rotor cable will be indicated by appearance of the T/R QUAD FAIL caution. No change in handling characteristics should occur if only one cable fails.
b. If both tail rotor control cables fail, a centering spring will position the tail rotor servo linkage to provide 10.5 degrees of pitch. This will allow trimmed flight at about ______________________ (these speeds will vary with gross weight).
25 KIAS up to 145 KIAS
T/R QUAD FAIL Caution Appears in Cruise Flight.
EP
- Collective — Adjust to determine controllability (Fixed Right or Left).
- LAND AS SOON AS PRACTICABLE.
**Loss of Control at Low Airspeed/Hover or T/R QUAD FAIL Caution Appears (Left Rotation). **
WARNING
Reducing collective in a left rotation will increase rate of turn with the ENG POWER CONT lever(s) at fly depending on the rate at which the ENG POWER CONT lever(s) are retarded. It is critical that the pilot on the controls maintain a level attitude, preserve NR, and apply cushion for the landing.
**Loss of Control at Low Airspeed/Hover or T/R QUAD FAIL Caution Appears (Left Rotation). **
EP
(1. ) ENG POWER CONT lever(s) — Retard to decrease NR below 100% and begin a partial power descent.
2. Collective — Adjust to preserve NR.
(3. ) ENG POWER CONT levers — OFF (5 to 10 feet above touchdown).
4. Collective — Adjust for landing.
Pedal Bind/Restriction or Drive With No Accompanying Caution.
A malfunction within the yaw boost servo or tail rotor servo can produce much higher force at the pedals and the affected servo must be turned off. A hardover failure of the yaw boost servo will increase control forces as much as ____________ on the pedals.
250 pounds
**Pedal Bind/Restriction or Drive With No Accompanying Caution. **
EP
-
Apply pedal force to oppose the drive.
(2. ) Check other pedals for proper operation.
(3. ) TAIL SERVO switch — BACKUP.
If normal control authority is not restored:
4. TAIL SERVO switch — NORMAL.
- SAS/BOOST switch — OFF.
If normal control forces are not restored:
- SAS/BOOST switch — ON.
- Collective — Adjust to determine controllability for landing.
- LAND AS SOON AS PRACTICABLE.
**T/R SERVO 1 FAIL Caution Appears and BACK UP PUMP ON Advisory Does Not Appear **
**or T/R SERVO 2 ON Advisory Does Not Appear. **
Automatic switch over did not take place. Loss of both the No. 1 hydraulic pump and backup pump results in (1)_________________. The yaw boost servo is still pressurized and the mechanical control system is still intact allowing (2)_______________________. Because of the limited yaw control range available, a roll- on landing at (3)___________________ is required.
(1) both stages of the tail-rotor servo being unpressurized
(2) limited tail-rotor control
(3) 40 KIAS or above
T/R SERVO 1 FAIL Caution Appears and BACK UP PUMP ON Advisory Does Not Appear
**or T/R SERVO 2 ON Advisory Does Not Appear. **
EP
(1. ) TAIL SERVO switch — BACKUP.
(2. ) BACKUP HYD PUMP switch — ON.
- LAND AS SOON AS PRACTICABLE.