General Visual Inspection of Shroud Box (EWIS)

TASK 05-25-70-200-002-A
General Visual Inspection of Shroud Box (EWIS)

WARNING: DO NOT EXTEND THE SLATS AND FLAPS WHEN THE THRUST REVERSER COWLS ARE DEPLOYED IN THE 45 DEG. POSITION.

ZONE: 572
ZONE: 672

1. Reason for the Job
Refer to the MPD TASK: ZL-572-01
GENERAL VISUAL INSPECTION OF SHROUD BOX (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 2M (6 FT)
No specific	1	FLASHLIGHT
No specific	1	MIRROR - INSPECTION, FLEXIBLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
572	SHROUD BOX STA 0 TO STA 1800
672	SHROUD BOX STA 0 TO STA 1800
571AB, 671AB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 27-50-00-866-008-A	Extension of the Flaps on the Ground
TASK 27-50-00-866-008-A-01	Extension of the Flaps/Slats on the Ground
TASK 27-50-00-866-009-A	Retraction of the Flaps on the Ground
TASK 27-50-00-866-009-A-01	Retraction of the Flaps/Slats on the Ground
TASK 57-51-37-000-002-A	Removal of the Access Panels 571AB(671AB), 573AB(673AB), 573BB(673BB), 573CB(673CB), 573EB(673EB)
TASK 57-51-37-400-002-A	Installation of the Access Panels 571AB(671AB), 573AB(673AB), 573BB(673BB), 573CB(673CB), 573EB(673EB)
Shroud Box

3. Job Set-up
Subtask 05-25-70-866-050-A

A. Aircraft Maintenance Configuration
(1) Fully extend the flaps (Ref. AMM TASK 27-50-00-866-008).

Subtask 05-25-70-010-051-B

B. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) in position.
(2) Remove access panel 571AB ( 671AB) (Ref. AMM TASK 57-51-37-000-002).

4. Procedure
Subtask 05-25-70-210-051-A

A. Inspection

Shroud Box

(1) Do a general visual inspection of the shroud box (zones 572 and 672) with the FLASHLIGHT and the MIRROR - INSPECTION, FLEXIBLE .
(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 and piping) are correctly attached.

5. Close-up
Subtask 05-25-70-410-051-B

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install access panel 571AB ( 671AB) (Ref. AMM TASK 57-51-37-400-002).
(3) Remove the access platform(s).

Subtask 05-25-70-866-051-A

B. Aircraft Maintenance Configuration
(1) Retract the flaps. (Ref. AMM TASK 27-50-00-866-009)

[Rev.10 from 2021] 2026.03.31 22:50:30 UTC