Removal of the Waste-Water De-icing Heater Elements

TASK 30-71-53-000-001-A
Removal of the Waste-Water De-icing Heater Elements

ZONE: 131
FIN: 41DU ** ON A/C NOT FOR ALL
FIN: 42DU ** 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	AR	ACCESS PLATFORM 2M (6 FT)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
131	FORWARD CARGO COMPARTMENT
825
FOR [41DU] (HEATER-TAPE,)
FOR [42DU] (HEATER-TAPE,)
131EF, 131FF, 131GF, 131GW, 131HW

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 30-71-17-000-001-A	Removal of the Waste-Water De-icing Sensor
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
Heater Elements

3. Job Set-up
Subtask 30-71-53-861-051-A ** ON A/C NOT FOR ALL

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 30-71-53-865-050-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
2000VU	POT/WASTE WIP-HEATER-LINE	1DW	A02
2000VU	POT/WASTE WIP-HEATER-CTL	2DW	A01

Subtask 30-71-53-010-050-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) in position at forward cargo-compartment door 825.
(2) Open forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-001).
(3) Set cargo-compartment light switch 6LU is set to ON.
(4) Remove sidewall panels and floor panels
(a) FOR [41DU] (HEATER-TAPE,), [42DU] (HEATER-TAPE,)
131GW 131HW 131GF 131FF 131EF.

4. Procedure
Subtask 30-71-53-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Heater Element
(1) Remove and discard the cable ties of the identification and warning labels.
(2) Remove the clamps (10) and the spacers (11).
(3) Remove the velcro tape (3), the adhesive tape and the insulation muffs (8).
(4) Carefully remove and discard the adhesive tape (2) which is on the longitudinal cut of the insulation sleeve (1).
(5) Remove the insulation sleeve (1) that insulates the waste water line.
(6) Disconnect the three wires of the heater elements (4) and (5) from the terminal strip.

NOTE: Identify all the electrical wires before you disconnect them.

(7) Remove the waste-water de-icing sensor (40DU) (Ref. AMM TASK 30-71-17-000-001).
(8) Remove and discard the heat-shrink sleve (7) and the glass fiber tape (6) that attaches the heater elements (4) and (5) to the waste water line.

NOTE: Do not damage the waste water line when you remove the heat-shrink sleeve.

(9) Remove the heater elements (4) and (5).

[Rev.10 from 2021] 2026.04.01 06:20:16 UTC