TM 1-1520-238-T-4
4–104
Change 5
4–23.
ENGINE 1 OUT INDICATORS – ARE LIGHTED WITH ENGINE 1 RUNNING
4–23
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-T-6
TM 1-1520-238-23
TM 55-2840-248-23
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 P20.
Does indicator stay lighted?
YES
Refer to TM 1-1520-238-T-6 to
troubleshoot pilot and CPG
caution/warning system.
NO
Go to step 2.
2. Detach wire from (A326)TB1–51–J. Check for
short between P49–13 and ground.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 4–12.
NO
Go to step 3.
3. Check for 2.45 VDC or less at P49–3.
Is voltage present?
YES
Refer to TM 55-2840-248-23 to
troubleshoot engine 1.
NO
Go to step 4.
4. Check for 3.61 VDC or less at P49–1.
Is voltage present?
YES
Refer to TM 55-2840-248-23 to
troubleshoot engine 1.
NO
Replace engine out warning unit
(TM 1-1520-238-23).
END OF TASK
