TM 1-1520-238-T-7
Change 5
11–399
11–106. SCU 1 NO-GO LH CATWALK – APPEARS ON HOD (AAC)
11–106
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-4
TM 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions –
electrical power distribution
box cover removed
TM 1-1520-238-T-4
Maintenance headset
connected
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. Open STAB MAN DC (A76)CB6, STAB AUTO
DC (A76)CB3, STAB AUTO AC (A76)CB2, and
ENG WARN (A76)CB52 circuit breakers.
Detach:
P682 from (A705)J3,
P986 from (A637)J2,
P987 from (A637)J3.
Check for open between:
P682–50 and P987–K,
P682–49 and P987–V,
P682–48 and P987–X,
P431–A18 and P986–W,
(A402)TB2–29–D and (A402)J27–A18,
(A402)TB2–29–B and (A402)J27–A16.
Does open exist?
YES
Repair open wire.
Go to paragraph 11–88.
NO
Go to step 2.
2. Check for short between:
P987–K and ground,
P987–V and ground,
P987–X and ground.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 11–88.
NO
Go to step 3.
3. Check for open between P682–64 and ground.
Does open exist?
YES
Repair open wire.
Go to paragraph 11–88.
NO
Go to step 4.
4. Detach P686 from (A707)J2.
Check for open between:
P987–E and P686–8,
P987–G and P686–7.
Does open exist?
YES
Repair open wire.
Go to paragraph 11–88.
NO
Go to step 5.
