General Visual Inspection of Zone under Cabin Floor (EWIS)

TASK 05-21-40-200-002-A
General Visual Inspection of Zone under Cabin Floor (EWIS)

ZONE: 145
ZONE: 146

1. Reason for the Job
Refer to the MPD TASK: ZL-145-01
GENERAL VISUAL INSPECTION OF ZONE UNDER CABIN FLOOR (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
145	PRESS ZONE BETW WING CTR BOX MAIN GEAR
146	PRESS ZONE BETW WING CTR BOX MAIN GEAR
241EF, 241FF, 241GF, 241HF, 241JF, 241KF, 241LF, 241MF, 242FF, 242GF, 242HF, 242KF, 242LF, 242MF, 832, 842

C. Referenced Information

REFERENCE	DESIGNATION
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
TASK 53-00-00-000-801-A	Removal of the Floor Panels in the Cabin from FR12 to FR70
TASK 53-00-00-000-801-A-01	Removal of the Floor Panels in the Cabin from FR12 to FR70 (Alternative Removal Procedure - Dry Sealing Concept)
TASK 53-00-00-000-801-A-02	Removal of the Cabin Floor Panels from FR12 to FR70 (Alternative Removal Procedure with the Skyflex Option)
TASK 53-00-00-400-801-A	Installation of the Floor Panels in the Cabin from FR12 to FR70
TASK 53-00-00-400-801-A-01	Installation of the Floor Panels in the Cabin from FR12 to FR70 (Alternative Installation Procedure - Dry Sealing Concept)
TASK 53-00-00-400-801-A-02	Installation of the Cabin Floor Panels from FR12 to FR70 (Alternative Installation Procedure with the Skyflex Option)

3. Job Set-up
Subtask 05-21-40-010-051-A

A. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at zone 832 ( 842).
(2) Open aft passenger/crew door 832 ( 842) (Ref. AMM TASK 52-10-00-010-001).
(3) Remove floor panels 241EF 241FF 241GF, 241HF 241JF 241KF, 241LF 241MF 242FF, 242GF 242HF 242KF, 242LF and 242MF from the passenger compartment (Ref. AMM TASK 53-00-00-000-801).

4. Procedure
Subtask 05-21-40-210-051-A

A. Inspection
(1) Do a general visual inspection of the pressurized zone under the cabin floor.
(2) Make sure that there are no signs of corrosion, cracks or damage.
(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 05-21-40-410-051-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install floor panels 241EF 241FF 241GF, 241HF 241JF 241KF, 241LF 241MF 242FF, 242GF 242HF 242KF, 242LF and 242MF in the passenger compartment (Ref. AMM TASK 53-00-00-400-801).
(3) Close aft passenger/crew door 832 ( 842) (Ref. AMM TASK 52-10-00-410-001).
(4) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 22:48:45 UTC