EQUIP/FURNIS - DOOR AREA HEATING - FWD EMER EXIT and DOOR 1 - All heated floor panels are INOP

TASK 25-27-00-810-814-A
EQUIP/FURNIS - DOOR AREA HEATING - FWD EMER EXIT and DOOR 1 - All heated floor panels are INOP

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 24-56-55-000-002	Removal of the Contactor Located in the Panel 200VU
AMM 24-56-55-400-002	Installation of the Contactor Located in the Panel 200VU
AMM 25-27-00-740-001	Bite Test of the Heated Floor Panel System
ASM 252701
ASM 252703

3. Fault Confirmation
Subtask 25-27-00-740-074-A ** ON A/C NOT FOR ALL

A. Do the Bite Test of the Heated Floor Panel System AMM 25-27-00-740-001.

4. Fault Isolation
Subtask 25-27-00-810-074-A ** ON A/C NOT FOR ALL

A. If the test indicators on the control units 4DS, 60DS and 66DS do not come on:

Do a check of the aircraft wiring from the relay base 6MC-B, pin 21 to the associated terminal block ASM 252701 and ASM 252703.

(1) If there is no continuity:

Repair the aircraft wiring from the relay base 6MC-B, pin 21 to the associated terminal block ASM 252701 and ASM 252703.

(2) If there is continuity:

Replace the CONTACTOR, GALLEY PWR -A- [6MC] AMM 24-56-55-000-002 and AMM 24-56-55-400-002.

(a) If the fault continues:

Do a check of the aircraft wiring from the relay base 6MC-B, pin 19 to the circuit breaker 3DS, pin 2 ASM 252701.

1 If there is continuity:

2 If there is no continuity:

Repair the aircraft wiring from the relay base 6MC-B, pin 19 to the circuit breaker 3DS, pin 2 ASM 252701.

Subtask 25-27-00-740-075-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:27:01 UTC