Cleaning of EWIS Installed in the Rear Avionic Compartment (Only If Contaminated)(EWIS)

TASK 24-92-00-100-013-A
Cleaning of EWIS Installed in the Rear Avionic Compartment (Only If Contaminated)(EWIS)

ZONE: 127
ZONE: 128

1. Reason for the Job
Refer to the MPD TASK: 200127-02
CLEANING OF EWIS INSTALLED IN THE REAR AVIONIC COMPARTMENT (ONLY IF CONTAMINATED) (EWIS)

NOTE: This is an EWIS (Electrical Wiring Interconnection System) procedure. EWIS is defined in ESPM 20-33-11.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
127	REAR AVIONIC COMPARTMENT
128	REAR AVIONIC COMPARTMENT
824, 825

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 25-54-11-000-001-A	Removal of the Forward Cargo-Compartment Partition FR24A
TASK 25-54-11-400-001-A	Installation of the Forward Cargo-Compartment Partition FR24A
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
TASK 52-30-00-860-003-A	Open the FWD or Aft Cargo-Compartment Door with the Hand Pump
TASK 52-30-00-860-004-A	Close the FWD or Aft Cargo-Compartment Door with the Hand Pump
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
TASK 53-12-13-000-001-A	Removal of the avionics compartment floor panels
TASK 53-12-13-400-001-A	Installation of the avionics compartment floor panels
ESPM 2055000
TASK 06-41-53-00	FUSELAGE-DESCRIPTION AND OPERATION
Rear Avionic Compartment

3. Job Set-up
Subtask 24-92-00-010-108-B

A. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
(2) Open the access door 824 (Ref. AMM TASK 52-41-00-010-002).
(3) Open the forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-001) or (Ref. AMM TASK 52-30-00-860-003).
(4) Remove the aft avionic-compartment floor-panels between FR21 and FR24 (Ref. AMM TASK 53-12-13-000-001) and (Ref. AMM D/O 06-41-53-00).
(5) Remove the forward cargo-compartment partition-panels at FR24A (Ref. AMM TASK 25-54-11-000-001) and (Ref. AMM D/O 06-41-53-00).

Subtask 24-92-00-862-096-B

B. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

4. Procedure
Subtask 24-92-00-160-062-B

A. Cleaning of All Wiring Installed in the Rear Avionic Compartment (Only Contaminated Wiring)
(1) Clean the wiring if there is dust, lint or hydraulic contamination ESPM 2055000.
(a) On the AC/DC feeder routes: 1G and 2G.
(b) On the AC/DC power-distribution routes: 1P and 2P.
(c) On the flight control wiring.
(d) On the engine control routes: 1S and 2S.
(e) On the other routes: 1M and 2M.
(f) On the audio route: 1R.
(g) On the coaxial wiring routes: 3T and 4T.
(h) On the generator excitation routes: 1E and 2E.

5. Close-up
Subtask 24-92-00-410-106-B

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the aft avionic-compartment floor-panels between FR21 and FR24 (Ref. AMM TASK 53-12-13-400-001) and (Ref. AMM D/O 06-41-53-00).
(3) Install the forward cargo-compartment partition-panels at FR24A (Ref. AMM TASK 25-54-11-400-001) and (Ref. AMM D/O 06-41-53-00).
(4) Close the forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002) or (Ref. AMM TASK 52-30-00-860-004).
(5) Close the access door 824 (Ref. AMM TASK 52-41-00-410-002).
(6) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:27:11 UTC