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occurs. Additional information may be obtained by the
flight engineer checking the MAINTENANCE PANEL.
The transmission temperature and pressure selector
switches shall be used to assist in determining the defective
transmission.
9-1-35. XMSN OIL PRESS Caution.
If the XMSN OIL PRESS caution capsule comes on, the
following actions should be taken:
AFT or AFT SHAFT (confirm AFT SHAFT with flight
engineer):
Land as soon as possible.
FWD or COMB (MIX):
1. Altitude — Descend to minimum safe altitude.
2. Airspeed — 100 KIAS or Vne, whichever is
slower.
3. Land as soon as practicable.
LEFT or RIGHT
Engine power is required:
Land as soon as possible.
Engine power is not required:
1. EMERG ENG SHUTDOWN.
2. Land as soon as practicable.
9-1-36. XMSN OIL PRESS and XMSN AUX OIL
PRESS or XMSN CHIP DET Caution.
Land as soon as possible.
9-1-37. XMSN AUX OIL PRESS Caution.
If the XMSN AUX OIL HOT caution capsule comes on,
the following actions should be taken:
MAIN XMSN, (FWD, COMB (MIX) or AFT)
Main transmission oil pressure and temperature are abnormal:
Land as soon as possible.
Main transmission oil pressure and temperature are normal:
Land as soon as practicable.
9-1-38. XMSN OIL HOT Caution.
If the XMSN OIL HOT caution capsule comes on, the
following actions should be taken:
FWD or COMB (MIX):
Land as soon as possible.
AFT transmission is indicated:
1. Land as soon as possible.
2. Electrical load— Reduce as much as
possible.
LEFT or RIGHT
Engine power is required:
Land as soon as possible.
Engine power is not required:
1. EMER ENG SHUTDOWN.
2. Land as soon as practicable
9-1-39. 712 Torque Measuring System Malfunctions.
Malfunctions in the torque measuring system can appear
on the torquemeter as fluctuations, zero torque indication,
sluggish movement, indications that are out of
phase, or a stationary indication. Fluctuations in torque
at steady state are indicative of an electrical malfunction
within the system. If thisoccurs, proceed as follows:
1. AC and DC Torque circuit breakers — In.
2. N1s — Monitor when power changes are
made insuring power outputs are matched.
3. Fuel flow indicator — Monitor for matched
fuel flows.
TM 1-1520-240-10
9-1-22
9-1-40. 714A Torque Measuring System Malfunctions.
Malfunctions in the torque measuring system can appear
on the torquemeter as fluctuations, zero torque indication,
sluggish movement, indications that are out of
phase, or a stationary indication. If this occurs, proceed
as follows:
N1 and PTIT indicators — Check.
N1s and PTITs not matched.
1. LOAD SHARE switch — PTIT.
2. PTIT indicators — Check.
PTITs not matched.
Land as soon as practicable.
N1s and PTITs are matched.
AC and DC Torque and Engine circuit
breakers — IN.
9-1-41. FIRE.
The safety of helicopter occupants is the primary consideration
when fire occurs: therefore, it is imperative that
every effort be made by the flight crew to put out the fire.
On the ground, it is essential that engines be shut down,
crew and passengers be evacuated, and fire fighting
begun immediately. If the helicopter is airborne when the
fire occurs, the most important single action that can be
taken by the pilot is to land as soon as possible. Whether
on the ground or inflight, it is mandatory that the cockpit
windows , air control handles and cockpit air knobs be
closed to prevent smoke and fumes from entering the
cockpit, unless the smoke and fume elimination procedure
has been executed. In flight, the pilot should execute
the smoke and fume elimination procedure as necessary
to prevent smoke and fumes from entering the
cockpit. Fire extinguishers should be used to control or
extinguish the fire.
WARNING
Use fire extinguisher only in well-ventilated
areas because toxic fumes of the extinguisher
agent can cause injury
9-1-42. ENGINE HOT START.
A hot start will be detected by a rapid and abnormal rise
in PTIT and/or by observing flames and black smoke
coming from the engine tail cone. Complete the following
on the affected engine.
ABORT START.
9-1-43. Residual Fire During Shutdown.
A residual engine fire may occur during shutdown. It is
caused by residual fuel igniting in the combustion chamber.
1. ABORT START.
2. FIRE PULL handle (affected engine) —
Pull.
9-1-44. Auxilliary Power Unit (APU) Fire.
Normally an overtemperature condition condition will
　
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