TM 1-1520-238-T-6
9–280
9–88.
PILOT COLLECTIVE STICK – DOES NOT LIGHT LANDING/SEARCH LIGHT
9–88
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. On pilot collective stick, set SRCH LT switch to
ON, check for 28 VDC at DS11-2.
Is voltage present?
YES
(AAQ) Go to step 4.
(AAJ) Go to step 10.
NO
Go to step 2.
2. Check for 28 VDC at J107-s.
Is voltage present?
YES
Go to step 3.
NO
Repair open wire between
J107-s and (A326)TB1-24-B.
Go to paragraph 9–80.
3. Check for open between J107-t and DS11-2.
Does open exist?
YES
Repair open wire. Go to
paragraph 9–80.
NO
Replace pilot SRCH LT
switch (S4)
(TM 1-1520-238-23).
4. (AAQ) Check for 28 VDC at (A326)XK320-C.
Is voltage present?
YES
Go to step 6.
NO
Go to step 5.
5. Check for open between (A326)XK320-C and
DS11-8.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–80.
NO
Replace landing/search light
(TM 1-1520-238-23).
6. Check for 28 VDC at (A326)XK320-B.
Is voltage present?
YES
Go to step 8.
NO
Go to step 7.
7. Check for open between (A326)XK320-B and
(A402)J29-4.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–80.
NO
Go to paragraph 9–263 to
troubleshoot circuit protection
system (dc emergency bus –
pilot station).
8. Check for 28 VDC at (A326)XK320-A.
Is voltage present?
YES
Go to step 9.
NO
Replace search light relay
(A326)K320
(TM 1-1520-238-23).
9. Check for open between (A326)XK320-A and
DS11-9.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–80.
NO
Replace landing/search light
(TM 1-1520-238-23).
