TM 1-1520-238-T-4
Change 5
6–75
6–15.1. HOD NGB READING – DISPLAYS 50 LB OIL PRESSURE
6–15.1
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
References:
TM 1-1520-238-23
TM 55-1500-323-24
TM 9-1230-476-20-2
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions –
L200 access panel and
LN6, L60 fairings open.
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. Inspect splice SP1 on red wire from NGB 1 oil
pressure transducer (MT11).
Does open exist?
YES
Repair splice
(TM 55-1500-323-24).
Go to paragraph 6–13.
NO
Go to step 2.
2. Depin splices SP1 (red wire) and SP2 (black
wire) on MT11 wire harness. Check for open
between red and black wire to MT11.
Does open exist?
YES
Replace NGB 1 oil
pressure transducer
(TM 1-1520-238-23).
Go to paragraph 6–13.
NO
Go to step 3.
3. Detach P61. Check for open between P61–L
and SP1 (red wire).
Does open exist?
YES
Repair open wire
(TM 55-1500-323-24).
Go to paragraph 6–13.
NO
Go to srep 4.
4. Detach P673. Check for open between
P673–85 and J61–L.
Does open exist?
YES
Repair open wire between:
P673–85 and J403–B4,
P403–B4 and J61–L
(TM 55-1500-323-24).
Go to paragraph 6–13.
NO
Refer to TM 9-1230-476-20-2 to
troubleshoot multiplex
subsystem.
END OF TASK
