TM 1-1520-238-T-6
9–773
9–410. FALSE ENGINE OUT WARNING – OCCURS INFLIGHT (SINGLE ENGINE
9–410
MANEUVER AT HIGH POWER SETTING AND Np LESS THAN 89%)
Tools:
Nomenclature
Part Number
Tool Kit, Aircraft
SC518099CLA01
Mechanic’s
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
67R
Attack Helicopter Repairer
68X
Armament/Electrical Systems Repairer
100KG Pilot
References:
TM 1-1520-238-23
TM 1-1520-238-T-8
TM 1-1520-238-CL
Equipment Conditions:
Ref
Condition
TM 1-1520-238-CL
Engines 1 and 2 running
WARNING
Turn off power before detaching or
attaching wires and connectors. High
current 28 VDC or 115 VAC is present.
Failure to do so could result in death or
serious injury.
1. Check pilot TORQUE indicator.
Does TORQUE indicator 1 and vertical scale
and digital readouts indicate zero percent?
YES
Refer to TM 1-1520-238-T-8 to
troubleshoot engine
instruments.
NO
Go to step 2.
2. Shutdown engines 1 and 2. Check for open
between:
P49-28 and P405-A16,
P49-29 and P405-A17,
P49-30 and P405-A19,
P49-31 and P405-A20.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–395.
NO
Go to step 3.
3. Check for open between (A326):
J3-A16 and TB1-4-A,
J3-A17 and TB1-5-A,
J3-A19 and TB1-17-E,
J3-A20 and TB1-17-J.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–395.
NO
Replace engine out warning unit
(TM 1-1520-238-23).
END OF TASK
