Detailed Inspection of Outer Wing, Bottom Skin Lower Surface at Attachment to Front Spar and Rear Spar, between RIB22 and RIB27

TASK 57-21-00-200-017-A
Detailed Inspection of Outer Wing, Bottom Skin Lower Surface at Attachment to Front Spar and Rear Spar, between RIB22 and RIB27

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.

ZONE: 540
ZONE: 640

1. Reason for the Job
Refer to the MPD TASK: 572131-01
DETAILED INSPECTION OF OUTER WING, BOTTOM SKIN LOWER SURFACE AT ATTACHMENT TO FRONT SPAR AND REAR SPAR, BETWEEN RIB 22 AND RIB 27

NOTE: The effectivity of this task is ALL. To know if this task is applicable for your aircraft, refer to the MPD task applicability and the weight variant data given in the SRM introduction.

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

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 4M (13 FT)
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
98D27803500001	1	LOCKING TOOL ZERO POS

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
540	FUEL TANK
640	FUEL TANK

D. Referenced Information

REFERENCE	DESIGNATION
SRM 572100	(for corrective action)
Details of the Bottom Skin Lower Surface - RIBS 22 thru 27

3. Job Set-up
Subtask 57-21-00-941-067-A

A. Safety Precautions
(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.
(4) Put the ACCESS PLATFORM 4M (13 FT) in position below the wing fuel tank, zone 540 (640).

4. Procedure
Subtask 57-21-00-110-066-A

A. Preparation for Inspection
(1) Clean the lower surface of the bottom skin at the attachments to the front spar and the rear spar (RIBS 22 thru 27). Use a clean Textile-Lint free Cotton - (Material No.14SBA1) , made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .

Subtask 57-21-00-210-071-A

B. Inspection
(1) Examine the lower surface of the bottom skin at the attachments to the front spar and the rear spar (RIBS 22 thru 27).
Make sure that:

there is no corrosion or damage
there are no scratches or scores
there are no loose or damaged fasteners
the surface protection is in the correct condition.

NOTE: If necessary, refer to the SRM 572100 for the correct repair procedure.

5. Close-up
Subtask 57-21-00-942-066-A

A. 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] 2026.04.01 02:10:18 UTC