EQUIP/FURNIS - DOOR AREA HEATING - DOOR 1 RH - All heated floor panels are INOP

TASK 25-27-00-810-810-A
EQUIP/FURNIS - DOOR AREA HEATING - DOOR 1 RH - All heated floor panels are INOP

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 25-27-00-740-001	Bite Test of the Heated Floor Panel System
ASM 252703
AMM 25-27-34-000-002	Removal of the Control Unit 60DS, 66DS
AMM 25-27-34-400-002	Installation of the Control Unit 60DS, 66DS

3. Fault Confirmation
Subtask 25-27-00-740-072-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 25-27-00-810-073-A ** ON A/C NOT FOR ALL

A. If the test indicators on the control unit 66DS do not come on:

(1) If there is no 115 VAC:

Do a check of the aircraft wiring between the related electrical connector 66DS-B, pin A1 and the circuit breaker 52DS ASM 252703.

(a) If there is continuity:

Replace the circuit breaker C/B-DR AREA HTG PNLS-DOOR1-FPH- or C/B-DR AREA HTG PNLS-DR1-FPH-RH [52DS] .

(b) If there is no continuity:

(2) If there is 115 VAC:

(a) If there is no 28 VDC:

Repair the aircraft wiring between the electrical connector 66DS-A, pin 16 and the associated terminal block ASM 252703.

(3) If there is 28 VDC:

Replace the CTL UNIT-DOOR AREA HEATING [66DS] AMM 25-27-34-000-002 and AMM 25-27-34-400-002.

Subtask 25-27-00-740-073-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