Installation of the Waste-Water De-icing Heater Elements

TASK 30-71-53-400-006-A
Installation of the Waste-Water De-icing Heater Elements

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 127
FIN: 142DU ** ON A/C NOT FOR ALL
FIN: 48DU ** ON A/C NOT FOR ALL
FIN: 49DU ** 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)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.05EML7)	Epoxy Adhesive-- - Legacy 3
(Material No.08ABC1)	Aqueous Cleaner-Aircraft Exterior Pressure Spraying -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
127	REAR AVIONIC COMPARTMENT
825
FOR [142DU] (HEATER-TAPE, WASTE WTR)
131GW
FOR [48DU] (HEATER)
131GW, 131HW
FOR [49DU] (HEATER)
131CG, 131DG, 131EG, 131HW

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 30-71-00-710-002-A	Operational Test of the Waste-Water Ice-Protection Heater-Elements
TASK 30-71-17-400-002-A	Installation of the Temperature Sensor
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
Heater Elements

3. Job Set-up
Subtask 30-71-53-860-055-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized (Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position at the FWD cargo-compartment door 825.

Subtask 30-71-53-010-062-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the FWD cargo-compartment door 825 is open (Ref. AMM TASK 52-30-00-860-001).
(2) Make sure that the CARGO COMPT LIGHT switch 6LU is at ON.
(3) Make sure that, in the FWD cargo compartment, the following panel(s) is(are) removed:
(a) FOR [48DU] (HEATER)
131GW 131HW
(b) FOR [49DU] (HEATER)
131HW 131EG 131DG 131CG
(c) FOR [142DU] (HEATER-TAPE, WASTE WTR)
131GW.

Subtask 30-71-53-865-066-A ** ON A/C NOT FOR ALL

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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

4. Procedure
Subtask 30-71-53-420-056-A ** ON A/C NOT FOR ALL

A. Installation of the Heater Elements
(1) Clean the waste water line with Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) and a Textile-Lint free Cotton - (Material No.14SBA1) .
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Put the heater element (7) in position on the waste water line.
(4) Attach the heater element (7) to the waste water line with the Epoxy Adhesive-- - Legacy 3 (Material No.05EML7) (6) and with the heat-skrink sleeve (8).
(5) Make sure that all the electrical connections are clean and in the correct condition.
(6) Connect the three wires (5) of the heater element (7) to the terminal strip.

NOTE: Connect the electrical wires as identified during the removal procedure.

(7) If necessary, install the waste-water de-icing sensor (141DU) (Ref. AMM TASK 30-71-17-400-002).
(8) Insulate all the waste water lines with the insulation sleeve (10).

NOTE: Make sure that the electrical connections do not touch the insulation sleeve (10).

(9) Put Epoxy Adhesive-- - Legacy 3 (Material No.05EML7) (9) on the longitudinal cut of the insulation sleeve (10).
(10) Install the insulation muffs (4), the adhesive tape and safety it with the velcro tape (3).
(11) Install the spacers (2) and the clamps (1).
(12) Attach the identification and warning labels with the new cable ties.

NOTE: Do not damage the insulation sleeve (10) with the cable ties.

Subtask 30-71-53-865-067-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close 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 30-71-53-710-055-A ** ON A/C NOT FOR ALL

C. Do an operational test of the waste-water ice-protection (Ref. AMM TASK 30-71-00-710-002).

5. Close-up
Subtask 30-71-53-410-056-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) In the FWD cargo compartment, install the access panel(s):
(a) FOR [48DU] (HEATER)
131GW 131HW
(b) FOR [49DU] (HEATER)
131HW 131EG 131DG 131CG
(c) FOR [142DU] (HEATER-TAPE, WASTE WTR)
131GW.
(3) Set the CARGO COMPT LIGHT switch 6LU to OFF.
(4) Close the FWD cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002).
(5) Remove the access platform(s).

Subtask 30-71-53-862-055-A ** ON A/C NOT FOR ALL

B. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.01 00:32:07 UTC