Cleaning of EWIS Installed in the Zone Under Cabin Floor (Only If Contaminated)(EWIS)

TASK 24-92-00-100-015-A
Cleaning of EWIS Installed in the Zone Under Cabin Floor (Only If Contaminated)(EWIS)

ZONE: 145
ZONE: 146

1. Reason for the Job
Refer to the MPD TASK: 200145-01
CLEANING OF EWIS INSTALLED IN THE ZONE UNDER CABIN FLOOR (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
145	PRESS ZONE BETW WING CTR BOX MAIN GEAR
146	PRESS ZONE BETW WING CTR BOX MAIN GEAR

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 53-00-00-000-801-A	Removal of the Floor Panels in the Cabin from FR12 to FR70
TASK 53-00-00-000-801-A-01	Removal of the Floor Panels in the Cabin from FR12 to FR70 (Alternative Removal Procedure - Dry Sealing Concept)
TASK 53-00-00-000-801-A-02	Removal of the Cabin Floor Panels from FR12 to FR70 (Alternative Removal Procedure with the Skyflex Option)
TASK 53-00-00-400-801-A	Installation of the Floor Panels in the Cabin from FR12 to FR70
TASK 53-00-00-400-801-A-01	Installation of the Floor Panels in the Cabin from FR12 to FR70 (Alternative Installation Procedure - Dry Sealing Concept)
TASK 53-00-00-400-801-A-02	Installation of the Cabin Floor Panels from FR12 to FR70 (Alternative Installation Procedure with the Skyflex Option)
ESPM 2055000
TASK 06-41-53-00	FUSELAGE-DESCRIPTION AND OPERATION
Zone Under Cabin Floor - Cleaning Area - Zones 145-146

3. Job Set-up
Subtask 24-92-00-010-116-A

A. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position.
(2) Open the aft passenger/crew doors 832 (842) (Ref. AMM TASK 52-10-00-010-001).

Subtask 24-92-00-862-104-A

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

4. Procedure
Subtask 24-92-00-410-172-A

A. Preparation for Cleaning
(1) Remove the cabin floor panels from FR36 to FR46 (Ref. AMM TASK 53-00-00-000-801), (Ref. AMM D/O 06-41-53-00).

Subtask 24-92-00-160-064-A

B. Cleaning of All Wiring Installed in the Zone Under Cabin Floor (Only Contaminated Wiring)
(1) Clean the wiring if there is dust, lint or hydraulic contamination ESPM 2055000.
(a) On the AC/DC power-distribution route: 1P.
(b) On the engine control routes: 1S and 2S.
(c) On the other routes: 1M and 2M.

5. Close-up
Subtask 24-92-00-410-114-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the cabin floor panels from FR36 to FR46 (Ref. AMM TASK 53-00-00-400-801), (Ref. AMM D/O 06-41-53-00).
(3) Close the aft passenger/crew doors 832 (842) (Ref. AMM TASK 52-10-00-410-001).
(4) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:27:13 UTC