W DOC AIRBUS | AMM A320F

General Visual Inspection of EWIS of the 49VU and the 120VU (EWIS)

TASK 24-92-00-210-035-A
General Visual Inspection of EWIS of the 49VU and the 120VU (EWIS)

ZONE: 211
ZONE: 212
1. Reason for the Job
Refer to the MPD TASK: 200211-03
GENERAL VISUAL INSPECTION OF EWIS OF 49VU AND THE 120VU (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
No specific
AR
FLASHLIGHT
No specific
AR
MIRROR - INSPECTION, FLEXIBLE
 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 2052110
F 49VU and 120VU - Location
3. Job Set-up
Subtask 24-92-00-862-099-A
A. Make sure that the aircraft electrical circuits are de-energized
(Ref. AMM TASK 24-41-00-862-002).
Subtask 24-92-00-010-111-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 24-92-00-210-085-A
A. General Visual Inspection of All Wiring of the 49VU and the 120VU
   (1) Do a visual inspection of the wiring to make sure that there is no signs of ageing, alteration, overheating, scaling and deformation ESPM 2052110:
     (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.
NOTE: Use a FLASHLIGHT or a MIRROR - INSPECTION, FLEXIBLE if necessary.
   (2) Make sure that there is no dust or lint contamination.
5. Close-up
Subtask 24-92-00-410-109-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 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 06:13:21 UTC
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