TM 1-1520-238-T-7
11–302
Change 3
11–70. PILOT COLL 1 DCPLR NO-GO PLT COMPARTMENT OR PILOT COLL 2 DCPLR
11–70
NO-GO PLT COMPARTMENT - APPEARS ON HOD
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
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions –
R295 door 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. With BUCS TST switch held in PLT or CPG
position, check for 28 VDC at P688–127 and
P688–128.
Is voltage present?
YES
Go to step 2.
NO
Go to step 4.
2. Check pilot collective SPAD shear pin condition
(TM 1-1520-238-23).
Is shear pin sheared?
YES
Replace SPAD shear pin
(TM 1-1520-238-23).
NO
Go to step 3.
3. Detach P413 and P459. Check for short
between:
J272–1 and J272–2,
J272–1 and J272–4.
Does short exist?
YES
Repair shorted wire between:
J272–1 and P413–B15,
J272–2 and J459–A9,
J272–4 and J459–A13.
Go to paragraph 11–23.
NO
Replace pilot collective housing
(TM 1-1520-238-23).
4. Check for open between:
J272–2 and P688–127,
J272–4 and P688–128.
Does open exist?
YES
Repair open wire.
Go to paragraph 11–23.
NO
Go to step 5.
5. Check for open between:
P1–2 and P1–3,
P1–3 and P1–4.
Does open exist?
YES
Replace pilot collective housing
(TM 1-1520-238-23).
NO
(ACA) Replace DASEC
(TM 1-1520-238-23).
(ACB) Go to step 6.
6. (ACB) Detach filter adapter A708. Check for
open through pins A708–127 and A708–128.
Does open exist?
YES
Replace filter adapter
(TM 1-1520-238-23).
NO
Replace DASEC
(TM 1-1520-238-23).
END OF TASK
