Cleaning of EWIS Installed in the Center Passenger Overhead-Compartment (Only If Contaminated)(EWIS)

TASK 24-92-00-100-014-A
Cleaning of EWIS Installed in the Center Passenger Overhead-Compartment (Only If Contaminated)(EWIS)

ZONE: 243
ZONE: 244

1. Reason for the Job
Refer to the MPD TASK: 200243-02
CLEANING OF EWIS INSTALLED IN THE CENTER PASSENGER OVERHEAD 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
243	CENTER PASSENGER COMPT OVERHEAD COMPT
244	CENTER PASSENGER COMPT OVERHEAD COMPT
241AC, 241BC, 241CC, 241DC, 241EC, 241FC

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 25-23-41-000-001-A	Removal of the Ceiling Panels
TASK 25-23-41-400-001-A	Installation of the Ceiling Panels
TASK 25-24-41-000-001-A	Removal of the Overhead Stowage Compartments (OHSC)
TASK 25-24-41-400-001-A	Installation of the Overhead Stowage Compartments (OHSC)
TASK 25-42-41-000-001-A	Removal of Lavatory H
TASK 25-42-41-400-001-A	Installation of Lavatory H
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
ESPM 2055000
Center Passenger Overhead-Compartment - Cleaning Area - Zones 243-244
Center Passenger Overhead-Compartment - Access Panels - Zones 243-244

3. Job Set-up
Subtask 24-92-00-010-113-A ** ON A/C NOT FOR ALL

A. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at the zone 832 (842).
(2) Open the passenger/crew door 832 (842) (Ref. AMM TASK 52-10-00-010-001).
(3) Remove the furnishings in the zones 241 and 242:
(a) Remove the lavatories, if installed (Ref. AMM TASK 25-42-41-000-001).
(4) Remove the overhead stowage compartments between FR35.8 and FR47.1 (Ref. AMM TASK 25-24-41-000-001).
(5) Remove the ceiling panels in the zones 243 and 244 (Ref. AMM TASK 25-23-41-000-001):

241AC 241BC 241CC 241DC 241EC 241FC.

Subtask 24-92-00-862-101-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 24-92-00-160-063-A ** ON A/C NOT FOR ALL

A. Cleaning of All Wiring Installed in the Center Passenger Overhead-Compartment (Only Contaminated Wiring)
(1) Clean the wiring if there is dust contamination ESPM 2055000.
(a) On the AC/DC feeder routes: 3G and 6G.
(b) On the AC/DC power-distribution routes: 1P, 2P and 3P.
(c) On the engine control routes: 1S, 2S and 6S.
(d) On other routes: 1M and 2M.
(e) On the coaxial wiring route: 1U.
(f) On the generator excitation routes: 6E and 3E.
(g) On the audio or video routes: 7T, 8T and 9T.

5. Close-up
Subtask 24-92-00-410-111-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 ceiling panels in the zones 243 and 244 (Ref. AMM TASK 25-23-41-400-001):

241AC 241BC 241CC 241DC 241EC 241FC.

(3) Install the overhead stowage compartments between FR35.8 and FR47.1 (Ref. AMM TASK 25-24-41-400-001).
(4) Install the furnishings in the zones 241 and 242:
(a) Install the lavatories, if removed (Ref. AMM TASK 25-42-41-400-001).
(5) Close the passenger/crew door 832 (842) (Ref. AMM TASK 52-10-00-410-001).
(6) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:27:12 UTC