Floor Lighting on the Cockpit Seats Inoperative

TASK 25-11-00-810-816-A
Floor Lighting on the Cockpit Seats Inoperative

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 251101
AMM 25-11-51-000-001	Removal of the Captain/First Officer Seat
AMM 25-11-51-400-001	Installation of the Captain/First Officer Seat
AMM 33-12-00-710-001	Operational Test of the General Illumination
ASM 331201

3. Fault Confirmation
Subtask 25-11-00-710-063-A

A. Test
(1) Do the operational test of the general illumination AMM 33-12-00-710-001.

NOTE: Do the test of the console and the briefcase lights only.

4. Fault Isolation
Subtask 25-11-00-810-065-A

A. If during the operational test:
(1) A bulb is inoperative:

(2) The Captain floor lighting is inoperative:

disconnect the plug 1197VC and make sure that there is 28VDC at pins F and G ASM 251101.

(a) If there is 28VDC at pins F and G:

(b) If there is no 28VDC at pin F:

1 If the fault continues:

do a check and repair the wiring from the Captain seat (3MS) to the switch (15LE) pins 1B, 1C, 2C and 3B ASM 331201.

do a check and repair the wiring from the Captain Seat (3MS) to the ground ASM 331201.

(3) The First Officer floor lighting is inoperative:

(a) If there is 28VDC at pins F and G:

(b) If there is no 28VDC at pin F:

1 If the fault continues:

do a check and repair the wiring from the F/O seat (4MS) to the switch (16LE) pins 1B, 1C, 2C and 3B ASM 331201.

do a check and repair the wiring from the F/O seat (4MS) to the ground ASM 331201.

Subtask 25-11-00-710-064-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:27:00 UTC