TM 1-1520-238-T-7
Change 5
11–429
11–128. MAN STAB MOVES DOWN BUT NOT UP
11–128
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. Open STAB MAN DC (A76)CB6, STAB AUTO
DC (A76)CB3, STAB AUTO AC (A76)CB2, and
ENG WARN (A76)CB52 circuit breakers. Detach
P431 from (A402)J27.
Check for open between (A402):
TB2–21–B and J27–B10.
Does open exist?
YES
Repair open wire.
Go to paragraph 11–88.
NO
Go to step 2.
2. Detach P1077 from (A329)J1.
Check for open between P431–B10 and
P1077–L.
Does open exist?
YES
Repair open wire.
Go to paragraph 11–88.
NO
Go to step 3.
3. Check for open between (A329):
J1–L and TB1–1/2–C.
Does open exist?
YES
Repair open wire.
Go to paragraph 11–88.
NO
Go to step 4.
4. Set multimeter to diode setting. Place black
meter lead on (A329)TB1–1/2–H.
Check for open between (A329):
TB1–1/2–C and TB1–1/2–H.
Does open exist?
YES
Repair open wire.
Go to paragraph 11–88, or
replace diode
(TM 1-1520-238-23).
NO
Repair open wire between
(A329):
TB1–1/2–H and TB1–3–H.
Go to paragraph 11–88.
END OF TASK
