Special Detailed Inspection of Outer Wing, Top Skin Lower Surface, including Stringers and Butt Strap, between Rib 1 and Rib 8

TASK 57-20-00-220-006-A
Special Detailed Inspection of Outer Wing, Top Skin Lower Surface, including Stringers and Butt Strap, between Rib 1 and Rib 8

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

1. Reason for the Job

NOTE: This procedure is only applicable to the dry bay area. Do this procedure at the same time as MPD Task ZL-540-02 (Ref. TASK 05-25-40-200-004-A).

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
98D27803500001	1	LOCKING TOOL ZERO POS

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
521AZ, 521BZ, 521EB, 621AZ, 621BZ, 621EB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 57-27-11-000-005-A	Removal of the Access Panel
TASK 57-27-11-400-005-A	Installation of the Access Panel
TASK 57-27-11-400-005-D	Installation of the Access Panel
TASK 57-27-11-400-005-E	Installation of the Access Panel
TASK 57-41-37-000-004-A	Removal of the Pressure Relief Panels
TASK 57-41-37-400-002-A	Installation of the Pressure Relief Panels
NTM 572060
SRM 57210000	(for corrective action)
Inspection Area - Panel Numbers and Dry Bay Location

3. Job Set-up
Subtask 57-20-00-941-099-A ** ON A/C NOT FOR ALL

A. Safety Precautions

Inspection Area - Panel Numbers and Dry Bay Location ** ON A/C NOT FOR ALL

(1) Install the 98D27803500001 LOCKING TOOL ZERO POS on the flap/slat control lever.
(2) Put WARNING NOTICE(S) in the cockpit to tell persons not to operate the flaps or slats.
(3) Put the SAFETY BARRIER(S) in position.

Subtask 57-20-00-010-096-B ** ON A/C NOT FOR ALL

B. Get Access
(1) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE below the applicable wing leading-edge, zone 521(621).
(2) Remove the applicable access panels:
(a) For the LH wing, remove:

(b) For the RH wing, remove:

4. Procedure
Subtask 57-20-00-220-054-A ** ON A/C NOT FOR ALL

A. Special Detailed Inspection of Outer Wing, Top Skin Lower Surface, including Stringers and Butt Strap, between Rib 1 and Rib 8
(1) Examine the applicable inspection area NTM 572060.

NOTE: If necessary, refer to SRM 57210000 for allowable damage and repair data.

5. Close-up
Subtask 57-20-00-410-095-B ** ON A/C NOT FOR ALL

A. Close Access
(1) Install the applicable access panels:
(a) For the LH wing, install:

(b) For the RH wing, install:

Subtask 57-20-00-942-100-A ** ON A/C NOT FOR ALL

B. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the access platform(s).
(3) Remove the 98D27803500001 LOCKING TOOL ZERO POS from the flap/slat control lever.
(4) Remove the WARNING NOTICE(S).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:30:37 UTC