Removal of the Aft-Cargo Drain-Heating Heater-Elements

TASK 30-71-56-000-001-A
Removal of the Aft-Cargo Drain-Heating Heater-Elements

ZONE: 150
FIN: 10DU ** ON A/C NOT FOR ALL
FIN: 22DU ** ON A/C NOT FOR ALL
FIN: 87DU ** ON A/C NOT FOR ALL
FIN: 88DU ** ON A/C NOT FOR ALL
FIN: 89DU ** ON A/C NOT FOR ALL
FIN: 90DU ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ELEC CONTACTS INSERTION EXTRACTION TOOL M15570-20
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
150	AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT
FOR [87DU] (HEATER-TAPE, WASTE WTR)
151SG
FOR [88DU] (HEATER-TAPE, WASTE WTR)
151DF, 151SG
FOR [89DU] (HEATER-TAPE, WASTE WTR)
151DF, 151GF
FOR [90DU] (HEATER-TAPE, WASTE WTR)
151GF

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 52-30-00-860-006-A	Open the Bulk Cargo-Compartment Door
TASK 53-42-14-000-001-A	Removal of the Aft Cargo-Compartment Floor-Panels Zone 150
Heater Elements - Removal/Installation

3. Job Set-up
Subtask 30-71-56-861-050-A ** ON A/C NOT FOR ALL

A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 30-71-56-865-053-A ** ON A/C NOT FOR ALL

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2001VU	POT/WASTE WIP-HEATER-LINE	31DW	D03
2001VU	POT/WASTE WIP HEATER CTL	32DW	D02
2001VU	WASTE WIP-HEATER-LINE	22DU	E04
2001VU	WASTE WIP-HEATER-LINE	31DU	E04
2001VU	WASTE WIP-HEATER-CTL	10DU	E03

Subtask 30-71-56-010-050-F ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the BULK cargo-compartment door (Ref. AMM TASK 52-30-00-860-006).
(2) Set the SERVICE LIGHT switch to ON.
(3) Remove the following cargo-compartment floor panels
(Ref. AMM TASK 53-42-14-000-001):
(a) FOR [87DU] (HEATER-TAPE, WASTE WTR)
151SG.
(b) FOR [88DU] (HEATER-TAPE, WASTE WTR)
151SG 151DF.
(c) FOR [89DU] (HEATER-TAPE, WASTE WTR)
151DF 151GF.
(d) FOR [90DU] (HEATER-TAPE, WASTE WTR)
151GF.

4. Procedure
Subtask 30-71-56-020-050-B ** ON A/C NOT FOR ALL

A. Removal of the Heater Element (Example)
(1) Remove and discard the cable ties of the identification and warning labels.
(2) Remove and safety the cable ties which attach the electrical wires of the related heater element (1).
(3) Electrical connections:

CAUTION: MAKE MATCH MARKS ON ALL THE ELECTRICAL WIRES BEFORE YOU DISCONNECT THEM. IF YOU MAKE AN ERROR WHEN YOU CONNECT THE WIRES YOU WILL CAUSE DAMAGE TO EQUIPMENT.

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(a) Disconnect the electrical connections (3) with the ELEC CONTACTS INSERTION EXTRACTION TOOL M15570-20.
(4) If necessary, remove the related temperature sensor.
(5) Removal of shrinkable sleeve:

CAUTION: BE CAREFUL WHEN YOU REMOVE/INSTALL THE SHRINKABLE SLEEVE. IF YOU ARE NOT CAREFUL, YOU CAN CAUSE DAMAGE TO THE TUBE.

(a) Remove and discard the shrinkable sleeve (2) that safeties the two ends of the glass fiber tape (4).
(6) Remove and discard the glass fiber tape (4) which attaches the heater element (1) to the waste water tube (5).
(7) Remove the heater element (1).

[Rev.10 from 2021] 2026.04.01 00:32:08 UTC