Failure of the Forward Avionics-Compartment Dome-Light

TASK 33-35-00-810-805-A
Failure of the Forward Avionics-Compartment Dome-Light

1. Possible Causes

RELAY-PWR SPLY, AVIONICS COMPT FWD R LT CTL (25LS)
wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 33-35-00-720-001	Functional Test of the Avionics-Compartment Lighting
ASM 333501
AIPC 333508

3. Fault Confirmation
Subtask 33-35-00-720-058-A

A. Test
Do the functional test of the equipment compartment lighting AMM 33-35-00-720-001.

4. Fault Isolation
Subtask 33-35-00-810-054-A

A. If during the functional test when you push the AVIONICS COMPT LT pushbutton-switch, the forward dome light in the avionics compartment does not operate correctly:

remove the RELAY-PWR SPLY, AVIONICS COMPT FWD R LT CTL (25LS) AIPC 333508.

(1) If the fault continues:

do a check for a voltage at pin A/B2 of the power supply relay (25LS).

(a) If there is a voltage:

do a check and repair the wiring from the power supply relay (25LS) pin A/B3 to the first terminal block ASM 333501.

(b) If there is no voltage:

do a check and repair the wiring from the power supply relay (25LS) pin A/B2 to the first terminal block ASM 333501.

Subtask 33-35-00-720-059-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:31:57 UTC