General Visual Inspection of Underfloor Bay of Aft Cargo Compartment (EWIS)

TASK 05-21-50-200-002-A
General Visual Inspection of Underfloor Bay of Aft Cargo Compartment (EWIS)

ZONE: 153
ZONE: 154

1. Reason for the Job
Refer to the MPD TASK: ZL-153-01
GENERAL VISUAL INSPECTION OF UNDERFLOOR BAY OF AFT CARGO 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 2M (6 FT)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
153	U/FLOOR BAY OF AFT CARGO COMPARTMENT
154	U/FLOOR BAY OF AFT CARGO COMPARTMENT
826

C. Referenced Information

REFERENCE	DESIGNATION
TASK 28-11-27-000-001-A	Removal of the Additional Center Tank (ACT)
TASK 28-11-27-400-001-A	Installation of the Additional Center Tank (ACT)
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 53-42-14-000-001-A	Removal of the Aft Cargo-Compartment Floor-Panels Zone 150
TASK 53-42-14-400-001-A	Installation of the Aft Cargo-Compartment Floor-Panels Zone 150
TASK 53-42-14-400-001-A-01	Installation of the Aft Cargo-Compartment Floor-Panels (Alternative Installation Procedure with the Skyflex Option)
Underfloor Bay Area of the Aft Cargo Compartment ** ON A/C NOT FOR ALL
Underfloor Bay Area of the Aft Cargo Compartment ** ON A/C NOT FOR ALL
Underfloor Bay Area of the Aft Cargo Compartment ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 05-21-50-010-051-A ** ON A/C NOT FOR ALL

A. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) in position at zone 154.
(2) Open aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-001).
(3) Remove the floor panels between FR46 and FR59
(Ref. AMM TASK 53-42-14-000-001).

Subtask 05-21-50-010-051-B ** ON A/C NOT FOR ALL

Subtask 05-21-50-020-052-B ** ON A/C NOT FOR ALL

B. Removal of the Additional Center Tank (ACT)
(1) Remove the ACT, if installed (Ref. AMM TASK 28-11-27-000-001).

4. Procedure
Subtask 05-21-50-210-051-A

A. Inspection

Underfloor Bay Area of the Aft Cargo Compartment ** ON A/C NOT FOR ALL

(1) Do a general visual inspection of the underfloor bay of the aft cargo compartment (zones 153 and 154).
(2) Make sure that there are no signs of corrosion, cracks or damage.
(3) Make sure that all the installations (wiring, ducting and piping) are correctly attached.

5. Close-up
Subtask 05-21-50-420-052-B ** ON A/C NOT FOR ALL

A. Installation of the ACT
(1) Install the ACT, if removed (Ref. AMM TASK 28-11-27-400-001).

Subtask 05-21-50-410-051-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Install the floor panels between FR46 and FR59
(Ref. AMM TASK 53-42-14-400-001).
(2) Close aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-002).
(3) Remove the access platform(s).

Subtask 05-21-50-410-051-B ** ON A/C NOT FOR ALL

B. Close Access
(1) Install the floor panels between FR47.2 and FR59
(Ref. AMM TASK 53-42-14-400-001).
(2) Close aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-002).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 22:48:51 UTC