TM 1-1520-238-T-6
Change 5
9–239
9–61.
TAIL NAVIGATION LIGHT – DOES NOT LIGHT
9–61
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
One person to assist
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. On pilot EXT LT/INTR LT panel, cycle NAV
switch to BRT then DIM.
Does tail navigation light function properly in
one position and not the other?
YES
Replace pilot EXT LT/INTR LT
panel (TM 1-1520-238-23).
NO
Go to step 2.
2. Remove DS7. Check for 28 VDC between
XDS7-1 and XDS7-2.
Is voltage present?
YES
Replace tail navigation light
(TM 1-1520-238-23).
NO
Go to step 3.
3. Check for open between P100-B15 and XDS7-1.
Does open exist?
YES
Repair open wire.
