TM 1-1520-238-T-5
8–96
8–30.
PILOT ENG OIL, TGT, TORQUE, FUEL QUANTITY, ENG–RTR RPM%, AND NG RPM%
8–30
VERTICAL SCALE INDICATORS – DO NOT DIM (AUTO DIM)
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer (2)
References:
TM 1-1520-238-23
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. Detach P787. Cover photocell on pilot
DIM/TEST panel to stop light penetration. Check
resistance between (A114):
J1–5 and J1–6.
Is resistance more than 50K ohms?
YES
Go to step 2.
NO
Replace pilot dim/test panel
(TM 1-1520-238-23).
2. With pilot ENG INST circuit breaker closed,
check for 6 VDC at P787–5.
Is voltage present?
YES
Go to step 5.
NO
Go to step 3.
3. With pilot ENG INST circuit breaker closed,
check for 6 VDC at (A82)1J2–15 on SDC.
Is voltage present?
YES
Repair open wire between
P401–15 and P787– 5.
Go to paragraph 8–10.
NO
Go to step 4.
4. Check for short between P401–15 and ground.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 8–10.
NO
Replace SDC
(TM 1-1520-238-23).
5. Check for open between P401–16 and P787–6.
Does open exist?
YES
Repair open wire.
Go to paragraph 8–10.
NO
Replace SDC
(TM 1-1520-238-23).
END OF TASK
