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

TASK 24-92-00-100-011-A
Cleaning of EWIS Installed in the Forward Passenger Overhead-Compartment (Only If Contaminated)(EWIS)

ZONE: 233
ZONE: 234

1. Reason for the Job
Refer to the MPD TASK: 200233-02
CLEANING OF EWIS INSTALLED IN THE FORWARD PASSENGER COMPARTMENT 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
233	FWD PASSENGER COMPT OVERHEAD COMPARTMENT
234	FWD PASSENGER COMPT OVERHEAD COMPARTMENT
231BC, 231CC, 231DC, 231EC, 231FC, 231GC, 231HC, 231JC, 231KC, 231LC, 231MC

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 25-27-44-000-002-A	Removal of the Forward Stowage
TASK 25-27-44-400-002-A	Installation of the Forward Stowage
TASK 25-41-41-000-001-A	Removal of Lavatory A
TASK 25-41-41-000-001-B	Removal of Lavatory A
TASK 25-41-41-400-001-A	Installation of Lavatory A
TASK 25-41-41-400-001-B	Installation of Lavatory A
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
Forward Passenger Overhead-Compartment - Cleaning Area - Zones 233-234
Forward Passenger Overhead Compartment - Access Panels - Zones 233-234

3. Job Set-up
Subtask 24-92-00-010-104-A ** ON A/C NOT FOR ALL

A. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at the zone 831 (841).
(2) Open the passenger/crew door 831 (841) (Ref. AMM TASK 52-10-00-010-001).
(3) Remove the furnishings in the zones 231 and 232:
(a) Remove the lavatories, if installed (Ref. AMM TASK 25-41-41-000-001) and (Ref. AMM D/O 25-41-42-00).
(b) Remove the stowage, if installed (Ref. AMM TASK 25-27-44-000-002) and (Ref. AMM D/O 25-27-44-00).
(c) Remove the galleys, if installed (Ref. AMM TASK 25-31-41-000-002).
(4) Remove the overhead stowage compartments between FR20 and FR36 (Ref. AMM TASK 25-24-41-000-001).
(5) Remove the ceiling panels in the zones 233 and 234 (Ref. AMM TASK 25-23-41-000-001):

231BC 231CC 231DC 231EC 231FC 231GC 231HC 231JC 231KC 231LC 231MC.

Subtask 24-92-00-862-092-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 24-92-00-160-060-A ** ON A/C NOT FOR ALL

A. Cleaning of All Wiring Installed in the Forward 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 flight control routes: 7M and 7S.
(d) On the engine control route: 1S.
(e) On other routes: 1M and 2M.
(f) On the coaxial wiring routes: 1T, 3T, 8T, 9T and 1U.
(g) On the generator excitation route: 6E.

5. Close-up
Subtask 24-92-00-410-102-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 233 and 234 (Ref. AMM TASK 25-23-41-400-001):

231BC 231CC 231DC 231EC 231FC 231GC 231HC 231JC 231KC 231LC 231MC.

(3) Install the overhead stowage compartments between FR20 and FR36 (Ref. AMM TASK 25-24-41-400-001).
(4) Install the furnishings in the zones 231 and 232:
(a) Install the lavatories, if removed (Ref. AMM TASK 25-41-41-400-001) and (Ref. AMM D/O 25-41-42-40).
(b) Install the stowage, if removed (Ref. AMM TASK 25-27-44-400-002) and (Ref. AMM D/O 25-27-44-40).
(c) Install the galleys, if removed (Ref. AMM D/O 25-31-41-40), (Ref. AMM D/O 25-31-41-40).
(5) Close the passenger/crew door 831 (841) (Ref. AMM TASK 52-10-00-410-001).
(6) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:27:09 UTC