TM 1-1520-238-T-5
8–138
8–68.
PILOT AND CPG TORQUE INDICATORS – DO NOT INDICATE ENGINE 1 TORQUE
8–68
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
References:
TM 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions –
LN1 door opened
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 for open between:
P41–10 and P66–22,
P41–11 and P66–23.
Does short exist?
YES
Go to step 8.
NO
Go to step 2.
2. Detach P682, P74, P66, and P49. Check for
short between:
P41–10 and ground,
P41–11 and ground.
Does short exist?
YES
Go to step 3.
NO
Replace engine 1 torque sensor
(TM 1-1520-238-23).
3. Detach P405. Check for short between:
P41–10 and ground,
P41–11 and ground.
Does short exist?
YES
Go to step 7.
NO
Go to step 4.
4. Detach P469. Check for short between (A326):
J3–B1 and ground,
J3–B2 and ground.
Does short exist?
YES
Go to step 6.
NO
Go to step 5.
5. Check for short between:
P405–B4 and ground,
P405–B5 and ground,
P405–B7 and ground,
P405–B8 and ground.
Does short exist?
YES
Repair shorted wire between:
P405–B4 and P66–23,
P405–B5 and P66–22,
P405–B7 and P74–23,
P405–B8 and P74–22,
P449–B1 and P682–120,
P449–B2 and P682–119,
P449–B1 and P469–A1,
P449–B2 and P469–A2.
Go to paragraph 8–10.
NO
Repair shorted wire between:
P405–A16 and P49–28,
P405–A17 and P49–29.
Go to paragraph 8–10.
