W DOC AIRBUS | AMM A320F

Cleaning of EWIS Installed in 49VU and 120VU (Only If Contaminated)(EWIS)

TASK 24-92-00-100-017-A
Cleaning of EWIS Installed in 49VU and 120VU (Only If Contaminated)(EWIS)

ZONE: 211
ZONE: 212
1. Reason for the Job
Refer to the MPD TASK: 200211-02
CLEANING OF EWIS INSTALLED IN 49VU AND 120VU (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
211
COCKPIT
212
COCKPIT
 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
ESPM 2055000
F 49VU and 120VU - Location
3. Job Set-up
Subtask 24-92-00-862-106-A
A. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
Subtask 24-92-00-010-118-A
B. Get Access
   (1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position.
   (2) Open the forward passenger/crew door 831 (841) (Ref. AMM TASK 52-10-00-010-001).
   (3) Open the overhead circuit-breaker panel 49VU.
   (4) On the rear panel 120VU, open:
  • The rear circuit-breaker panel 121VU
  • The rear circuit-breaker panel 122VU
  • The AC power center 123VU
  • The AC power center 124VU
  • The rear circuit-breaker panel 125VU.
4. Procedure
Subtask 24-92-00-160-066-A
A. Cleaning of All Wiring Installed in 49VU and 120VU (Only Contaminated Wiring)
   (1) Clean the wiring if there is dust or lint contamination ESPM 2055000.
     (a) On the AC/DC feeder routes: 1G, 3G and 4G.
     (b) On the AC/DC power-distribution routes: 1P, 2P and 6P.
     (c) On the flight control wiring.
     (d) On the engine control routes: 1S and 2S.
     (e) On the other routes: 1M and 2M.
     (f) On the audio route: 1R.
     (g) On the generator excitation routes: 1E, 2E and 3E.
5. Close-up
Subtask 24-92-00-410-116-A
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) On the rear panel 120VU, close:
  • The rear circuit-breaker panel 121VU
  • The rear circuit-breaker panel 122VU
  • The AC power center 123VU
  • The AC power center 124VU
  • The rear circuit-breaker panel 125VU.
   (3) Close the overhead circuit-breaker panel 49VU.
   (4) Close the forward passenger/crew door 831 (841) (Ref. AMM TASK 52-10-00-410-001).
   (5) Remove the access platform(s).
[Rev.10 from 2021] 2026.04.02 06:13:25 UTC
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