TM 1-1520-238-T-5
8–180
8–98.
PILOT BAROMETRIC ALTIMETER EDGE–LIGHTING – DOES NOT LIGHT
8–98
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-T-6
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. Close pilot LT PRI circuit breaker.
Check for 5 VDC between (A326):
J17–B1 and J17–B2.
Is voltage present?
YES
Go to step 3.
NO
Go to step 2.
2. Check for 5 VDC at
(A326)TB1–33–F.
Is voltage present?
YES
Repair open wire between
(A326):
J17–B1 and TB1–33–F,
J17–B2 and TB1–34–F.
Go to paragraph 8–91.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot pilot edge–lights.
3. Check for 5 VDC between
P382–X and P382–Y.
Is voltage present?
YES
Replace pilot barometric
altimeter (TM 1-1520-238-23).
NO
Repair open wire between:
P468–B1 and P382–Y,
P468–B2 and P382–X.
Go to paragraph 8–91.
END OF TASK
