Installation of the Waste-Water De-icing Sensor

TASK 30-71-17-400-001-A
Installation of the Waste-Water De-icing Sensor

ZONE: 131
FIN: 40DU ** 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. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
131	FORWARD CARGO COMPARTMENT
131HW, 825

C. 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 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
Waste-Water De-icing Sensor

3. Job Set-up
Subtask 30-71-17-860-050-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).

Subtask 30-71-17-010-051-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position at the FWD-cargo compartment-door 825.
(2) Make sure that the FWD-cargo compartment-door 825 is open (Ref. AMM TASK 52-30-00-860-001).
(3) Make sure that the CARGO COMPT LIGHT switch 6LU is at ON.
(4) In the FWD cargo compartment, make sure that the panel 131HW is removed.

Subtask 30-71-17-865-051-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 30-71-17-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Sensor
(1) On the waste water pipe, install the clamp sensor assembly (6) and the clamp (2) with the screws (4) and (5).
(2) Tighten the screws (4) and (5).
(3) Remove the CAP-BLANKING from each electrical connector and receptacle.
(4) Make sure that all the electrical connections are clean and in the correct condition.
(5) Connect the two wires of the clamp sensor assembly (6) to the terminal strip.
(6) Install the sleeve (3) around the clamp sensor assembly.
(7) Make sure that the sleeve (3) is correctly installed around the sensor and the pipe.
(8) Install the velcro tape (1) to attach the sleeve (3) around the clamp sensor assembly (6).
(9) Install the new cable ties of the identification and warning labels.

Subtask 30-71-17-865-052-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 30-71-17-710-053-A ** ON A/C NOT FOR ALL

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

5. Close-up
Subtask 30-71-17-410-050-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) Install the panel 131HW.
(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 30-71-17-862-050-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 08:23:05 UTC