General Visual Inspection of Rear Avionic Compartment (EWIS)

TASK 05-21-20-200-010-A
General Visual Inspection of Rear Avionic Compartment (EWIS)

ZONE: 127
ZONE: 128

1. Reason for the Job
Refer to the MPD TASK: ZL-127-02
GENERAL VISUAL INSPECTION OF REAR AVIONIC COMPARTMENT (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	AR	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
127	REAR AVIONIC COMPARTMENT
128	REAR AVIONIC COMPARTMENT
127BF, 127BG, 127CF, 127DF, 128CF, 128EG, 824

C. Referenced Information

REFERENCE	DESIGNATION
TASK 25-54-11-000-001-A	Removal of the Forward Cargo-Compartment Partition FR24A
TASK 25-54-11-400-001-A	Installation of the Forward Cargo-Compartment Partition FR24A
TASK 25-54-12-000-002-A	Removal of the Ceiling Panels in the Forward Cargo Compartment
TASK 25-54-12-400-002-A	Installation of the Ceiling Panels in the Forward Cargo Compartment
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
TASK 53-12-13-000-001-A	Removal of the avionics compartment floor panels
TASK 53-12-13-400-001-A	Installation of the avionics compartment floor panels
Access Doors of the Avionics Compartment (Right Side)
Rear Avionic Compartment

3. Job Set-up
Subtask 05-21-20-010-059-A

A. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below zones 127 and 128.

Access Doors of the Avionics Compartment (Right Side)

(2) Open access door 824 (Ref. AMM TASK 52-41-00-010-002).
(3) Remove the forward cargo-compartment partition-panels at FR24A (Ref. AMM TASK 25-54-11-000-001).
(4) Remove the forward cargo-compartment ceiling-panels at FR24A (Ref. AMM TASK 25-54-12-000-002).
(5) Remove aft avionics-compartment floor-panels 127BF 127BG 127CF 127DF 128CF and 128EG (Ref. AMM TASK 53-12-13-000-001).
(6) Lift the insulation blankets sufficiently to do the inspection.

4. Procedure
Subtask 05-21-20-210-059-A

A. Inspection
(1) Do a general visual inspection of the rear avionics compartment (zones 127 and 128).
(2) Make sure that there are no signs of corrosion, cracks or damage on all the parts of the components and the structure that you can see.
(3) Make sure that all the installations (wiring, ducting, piping) are correctly attached.

5. Close-up
Subtask 05-21-20-410-059-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Put the insulation blankets back in position.
(3) Install aft avionics-compartment floor-panels 127BF 127BG 127CF 127DF 128CF and 128EG (Ref. AMM TASK 53-12-13-400-001).
(4) Install the forward cargo-compartment ceiling-panels at FR24A (Ref. AMM TASK 25-54-12-400-002).
(5) Install the forward cargo-compartment partition-panels at FR24A (Ref. AMM TASK 25-54-11-400-001).
(6) Close access door 824 (Ref. AMM TASK 52-41-00-410-002).
(7) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 22:48:33 UTC