TASK 33-12-00-810-802
Failure of the First Officer Dome Lights
1. Possible Causes
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- LT-DOME, F/O (162LE)
- LT-DOME, F/O (164LE)
- LT-DOME, F/O (166LE)
- LT-DOME, F/O (168LE)
- wiring
- SW-INT LT/DOME (14LE)
2. Job Set-up Information
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A. Referenced Information
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REFERENCE DESIGNATION
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IPC 331208
AMM 33-12-00-710-001 Operational Test of the General Illumination
AMM 33-12-11-000-002 Removal of the Cockpit Dome Light (161LE, 162LE,
163LE, 164LE, 165LE, 166LE, 167LE, 168LE) AMM 33-12-11-400-002 Installation of the Cockpit Dome Light (161LE, 162LE, 163LE, 164LE, 165LE, 166LE, 167LE, 168LE) ASM 33-12/01
3. Fault Confirmation
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A. Test Do the operational test of the general illumination (Ref. AMM TASK 33-12-00-710-001).
NOTE : Do this test for the dome lights only.
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4. Fault Isolation
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A. If, during the operational test:
(1) One dome light at the First Officer station does not operate correctly:
- remove the defective lamp LT-DOME, F/O (162LE) or LT-DOME, F/O (164LE) or LT-DOME, F/O (166LE) or LT-DOME, F/O (168LE) (Ref. AMM TASK 33-12-11-000-002).
- make sure that there is 28VDC at the lamp socket.
(a) If there is 28VDC:
- replace the defective lamp (Ref. AMM TASK 33-12-11-400-002).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞33-12-00∞∞∞∞∞∞∞∞∞∞Page 203
Feb 01/98 CES (b) If there is no 28VDC:
- do a check and repair the wiring (Ref. ASM 33-12/01).
(2) Two dome lights (162LE) and (164LE) or (166LE) and (168LE) at the First Officer station do not operate correctly:
- do a check for a ground signal at pin 3H of the INT LT/DOME switch (14LE) in the BRT position (Ref. ASM 33-12/01).
(a) If there is no ground signal:
- repair the wiring between the INT LT/DOME switch (14LE) pin 3H and the ground terminal (Ref. ASM 33-12/01).
(b) If there is a ground signal
- do a check and repair the wiring of the related First Officer dome lights (Ref. ASM 33-12/01).
(3) The four dome lights at the First Officer station do not operate correctly:
- do a check for 28VDC at pin 1C of the INT LT/DOME switch (14LE) (Ref. ASM 33-12/01).
(a) If there is 28VDC:
- make sure that there is continuity between the pin 1C of the INT LT/DOME switch (14LE) and: . the pin 1H of the INT LT/DOME switch (14LE) in the DIM position . the pin 3F of the INT LT/DOME switch (14LE) in the BRT position (Ref. ASM 33-12/01).
1 If there is continuity:
_
- repair the defective wiring between the INT LT/DOME switch (14LE) and the First Officer dome light (Ref. ASM 33-12/01).
2 If there is no continuity:
_ - replace the SW-INT LT/DOME (14LE) (Ref. IPC 331208).
a If the fault continues:
_
- repair the defective wiring (Ref. ASM 33-12/01).
(b) If there is no 28VDC:
- do a check and repair the wiring between the INT LT/DOME switch (14LE) pin 1C and the first terminal block (Ref. ASM 33-12/01).
B. Do the test given in Para. 3.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞33-12-00∞∞∞∞∞∞∞∞∞∞Page 204
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