Cleaning of EWIS Installed in the Forward Cabin Utility-Area (Only If Contaminated)(EWIS)

TASK 24-92-00-100-007-A
Cleaning of EWIS Installed in the Forward Cabin Utility-Area (Only If Contaminated)(EWIS)

ZONE: 221
ZONE: 222

1. Reason for the Job
Refer to the MPD TASK: 200221-01
CLEANING OF EWIS INSTALLED IN THE FORWARD CABIN UTILITY AREA (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
221	FWD CAB UTILITY AREA
222	FWD CAB UTILITY AREA

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 25-23-45-000-002-A	Removal of the Door Frame Linings from the Right Forward Passenger/Crew Door
TASK 25-23-45-000-005-A	Removal of the Door Frame Linings from the Left Forward Passenger/Crew Door
TASK 25-23-45-400-006-A	Installation of the Door Frame Linings on the Left Forward Passenger/Crew Door
TASK 25-23-45-400-007-A	Installation of the Door Frame Linings on the Right Forward Passenger/Crew Door
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
Forward Cabin Utility-Area - Cleaning Area - Zones 221-222
Forward Cabin Utility-Area - Access Panels - Zones 221-222

3. Job Set-up
Subtask 24-92-00-010-100-A

A. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at the zone 831 (841).
(2) Open the forward passenger/crew door 831 (841) (Ref. AMM TASK 52-10-00-010-001).

Subtask 24-92-00-862-088-A

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

4. Procedure
Subtask 24-92-00-410-171-A

A. Preparation for Cleaning
(1) Remove the door frame linings at the left and right FWD passenger/crew door (Ref. AMM TASK 25-23-45-000-005), (Ref. AMM TASK 25-23-45-000-002) and (Ref. AMM D/O 06-41-53-00).
(2) Remove the floor panels in the cabin from FR12 to FR20 (Ref. AMM TASK 53-00-00-000-801).

Subtask 24-92-00-160-056-A

B. Cleaning of All Wiring Installed in the Forward Cabin Utility-Area (Only Contaminated Wiring)
(1) Clean the wiring if there is dust or lint contamination ESPM 2055000.
(a) On the AC/DC power-distribution route: 1P.
(b) On other routes: 2M and 1R.

5. Close-up
Subtask 24-92-00-410-098-A

A. Close Access
(1) Install the floor panels in the cabin from FR12 to FR20 (Ref. AMM TASK 53-00-00-400-801).
(2) Install the door frame linings at the left and right FWD passenger/crew door (Ref. AMM TASK 25-23-45-400-006) and (Ref. AMM TASK 25-23-45-400-007).
(3) Close the forward passenger/crew door 831 (841) (Ref. AMM TASK 52-10-00-410-001).
(4) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:27:05 UTC