General Visual Inspection of Forward Avionic Compartment (EWIS)

TASK 05-21-20-200-007-A
General Visual Inspection of Forward Avionic Compartment (EWIS)

ZONE: 121
ZONE: 122

1. Reason for the Job
Refer to the MPD TASK: ZL-121-02
GENERAL VISUAL INSPECTION OF FORWARD 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
121	AVIONICS COMPARTMENT
122	AVIONICS COMPARTMENT
121AF, 121AL, 121BF, 121CF, 122BF, 811

C. Referenced Information

REFERENCE	DESIGNATION
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
Forward Avionic Compartment

3. Job Set-up
Subtask 05-21-20-010-056-A

A. Get Access
(1) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at 811.
(2) Open avionic-compartment access door 811 (Ref. AMM TASK 52-41-00-010-002).
(3) Open access door 121AL.
(4) Remove avionics-compartment floor panels 121AF 121BF 121CF and 122BF (Ref. AMM TASK 53-12-13-000-001).

4. Procedure
Subtask 05-21-20-210-056-A

A. Inspection
(1) Do a general visual inspection of the forward avionic compartment (Zones 121 and 122).
(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 attached correctly.

NOTE: Lift the insulation blankets sufficiently to complete a correct general visual inspection as necessary.

5. Close-up
Subtask 05-21-20-410-056-A

A. Close Access
(1) Install avionics-compartment floor panels 121AF 121BF 121CF and 122BF (Ref. AMM TASK 53-12-13-400-001).
(2) Close access door 121AL.
(3) Close avionic-compartment access door 811 (Ref. AMM TASK 52-41-00-410-002).
(4) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 22:48:31 UTC