Cleaning of EWIS Installed in the Aft Passenger Compartment (Only If Contaminated)(EWIS)

TASK 24-92-00-100-018-A
Cleaning of EWIS Installed in the Aft Passenger Compartment (Only If Contaminated)(EWIS)

ZONE: 251
ZONE: 252

1. Reason for the Job
Refer to the MPD TASK: 200251-01
CLEANING OF EWIS INSTALLED IN THE AFT PASSENGER 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
251	AFT PASSENGER COMPARTMENT
252	AFT PASSENGER COMPARTMENT
251AW, 251AX, 251BW, 251BX, 251CW, 251CX, 251DW, 251EW, 251FW, 251GW, 251GX, 251HW, 251JW, 251KW, 251LW, 251MW, 251NW, 251NX, 251PW, 251PX, 251QW, 251QX, 251RW, 251SW, 251TW, 251UW, 251VW, 251WW, 251XW, 251YW, 251ZW, 252AW, 252AX, 252BW, 252BX, 252CW, 252CX, 252DW, 252EW, 252FW, 252GW, 252GX, 252HW, 252JW, 252KW, 252LW, 252MW, 252NW, 252NX, 252PW, 252PX, 252QW, 252QX, 252RW, 252SW, 252TW, 252UW, 252VW, 252WW, 252XW, 252YW, 252ZW

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 25-21-41-000-001-A	Removal of the Passenger Seats
TASK 25-21-41-400-001-A	Installation of the Passenger Seats
TASK 25-23-43-000-001-A	Removal of the Upper Sidewall Panel
TASK 25-23-43-400-001-A	Installation of the Upper Sidewall Panel
TASK 25-23-44-000-001-A	Removal of the Lower Sidewall Panels (Dado Panels)
TASK 25-23-44-400-001-A	Installation of the Lower Sidewall Panels (Dado Panels)
TASK 25-23-48-000-001-A	Removal of the Cove Light Panel
TASK 25-23-48-400-001-A	Installation of the Cove Light Panel
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
Aft Passenger Compartment - Access Panels - Zones 251-252
Aft Passenger Compartment - Cleaning Area - Zones 251-252

3. Job Set-up
Subtask 24-92-00-010-119-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 251 and 252:
(a) Remove the lavatories, if installed (Ref. AMM TASK 25-42-41-000-001).
(b) Remove the passenger seats, if installed (Ref. AMM TASK 25-21-41-000-001).
(4) Remove the linings in the zones 251 and 252:
(a) Remove the upper sidewall panels (Ref. AMM TASK 25-23-43-000-001):

251BW 251PX 251EW 251HW 251LW 251PW 251SW 251VW 251YW 251BX, 252BW 252PX 252EW 252HW 252LW 252PW 252SW 252VW 252YW 252BX.

(b) Remove the lower sidewall panels (Ref. AMM TASK 25-23-44-000-001):

251AW 251NX 251DW 251GW 251KW 251NW 251RW 251UW 251XW 251AX, 252AW 252NX 252DW 252GW 252KW 252NW 252RW 252UW 252XW 252AX.

251CW 251GX 251QX 251FW 251JW 251MW 251QW 251TW 251WW 251ZW, 251CX 252CW 252GX 252QX 252FW 252JW 252MW 252QW 252TW 252WW 252ZW 252CX.

Subtask 24-92-00-862-107-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 24-92-00-160-067-A ** ON A/C NOT FOR ALL

A. Cleaning of All Wiring Installed in the Aft Passenger Compartment (Only Contaminated Wiring)
(1) Clean the wiring if there is dust or lint contamination ESPM 2055000.
(a) On the AC/DC power-distribution route: 2P.
(b) On the engine control route: 1S.
(c) On other routes: 1M, 2M and 8M.
(d) On the audio and video route: 1R.

5. Close-up
Subtask 24-92-00-410-117-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 linings in the zones 251 and 252:
(a) Install the upper sidewall panels (Ref. AMM TASK 25-23-43-400-001):

251BW 251PX 251EW 251HW 251LW 251PW 251SW 251VW 251YW 251BX, 252BW 252PX 252EW 252HW 252LW 252PW 252SW 252VW 252YW 252BX.

(b) Install the lower sidewall panels (Ref. AMM TASK 25-23-44-400-001):

251AW 251NX 251DW 251GW 251KW 251NW 251RW 251UW 251XW 251AX, 252AW 252NX 252DW 252GW 252KW 252NW 252RW 252UW 252XW 252AX.

251CW 251GX 251QX 251FW 251JW 251MW 251QW 251TW 251WW 251ZW, 251CX 252CW 252GX 252QX 252FW 252JW 252MW 252QW 252TW 252WW 252ZW 252CX.

(3) Install the furnishings in the zones 251 and 252:
(a) Install the lavatories, if removed (Ref. AMM TASK 25-42-41-400-001).
(b) Install the passenger seats, if removed (Ref. AMM TASK 25-21-41-400-001).
(4) Close the passenger/crew door 832 (842) (Ref. AMM TASK 52-10-00-410-001).
(5) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:27:16 UTC