TM 1-1520-238-T-7
10–176
Change 5
10–56. FUEL LOW AFT INDICATORS – ARE NOT LIGHTED WITH PILOT FUEL QUANTITY
10–56
INDICATOR AFT VERTICAL DISPLAY INDICATING BETWEEN 22 AND 26
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-T-6
TM 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions –
L40 door removed
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:
(A402)J31–B1 and P401–21,
(A402)J31–B2 and P401–22.
Does open exist?
YES
Repair open wire. Go to
paragraph 10–47.
NO
Go to step 2.
2. Check for open between (A82) 1J2–24 and
ground.
Does open exist?
YES
Go to step 3.
NO
Replace SDC
(TM 1-1520-238-23).
3. With P18 detached, check FUEL LOW AFT
indicator.
Is indicator lighted?
YES
Refer to TM 1-1520-238-T-6 to
troubleshoot pilot
caution/warning system.
NO
Go to step 4.
4. Check for short between:
P401–24 and ground,
P18–22 and ground.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 10–47.
NO
Go to step 5.
5. Check for open between:
P264–8 and P444–B1,
P264–9 and P444–B2.
Does open exist?
YES
Repair open wire.
Go to paragraph 10–47.
NO
Adjust aft fuel quantity low level
sensor
(TM 1-1520-238-23).
END OF TASK
