Cleaning of EWIS Installed in the Lateral Avionic Compartment (Only If contaminated)(EWIS)

TASK 24-92-00-100-031-A
Cleaning of EWIS Installed in the Lateral Avionic Compartment (Only If contaminated)(EWIS)

ZONE: 125
ZONE: 126

1. Reason for the Job
Refer to the MPD TASK: 200125-01
CLEANING OF EWIS INSTALLED IN THE LATERAL 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 4M (13 FT)-ADJUSTABLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
125	LATERAL AVIONIC COMPARTMENT
126	LATERAL AVIONIC COMPARTMENT
812, 813, 822, 824

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 52-10-00-010-001-A	Opening of the Passenger/Crew Door
TASK 52-10-00-410-001-A	Closing of the Passenger/Crew Door
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
ESPM 2055000
Lateral Avionic Compartment - Cleaning Area - Zones 125-126

3. Job Set-up
Subtask 24-92-00-010-152-A

A. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position.
(2) Open the forward passenger/crew door 831 (Ref. AMM TASK 52-10-00-010-001).
(3) Open the access doors 812 822 824 (Ref. AMM TASK 52-41-00-010-002).
(4) Open the access door 813, if installed.

Subtask 24-92-00-862-138-A

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

4. Procedure
Subtask 24-92-00-160-080-A

A. Cleaning of All Wiring Installed in the Lateral 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, 2G, 4G and 6G.
(b) On the AC/DC power-distribution routes: 1P, 2P and 6P.
(c) On the flight control wiring.
(d) On the engine control routes: 1S and 2S.
(e) On the other routes: 1M, 2M and 6M.
(f) On the audio route: 1R.
(g) On the coaxial wiring routes: 3T and 4T.
(h) On the generator excitation routes: 1E, 2E, 3E and 6E.

5. Close-up
Subtask 24-92-00-410-150-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 813, if installed.
(3) Close the access doors 812 822 824 (Ref. AMM TASK 52-41-00-410-002).
(4) Close the forward passenger/crew door 831 (Ref. AMM TASK 52-10-00-410-001).
(5) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:27:29 UTC