Special Detailed Inspection (HFEC) of Outer Wing, Bottom Skin, Upper and Lower Surfaces, Around Access Door Cutouts in Rib Bay 2-3 and Rib Bay 6-7

TASK 57-20-00-200-032-A
Special Detailed Inspection (HFEC) of Outer Wing, Bottom Skin, Upper and Lower Surfaces, Around Access Door Cutouts in Rib Bay 2-3 and Rib Bay 6-7

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: 572040-03
SPECIAL DETAILED INSPECTION (HFEC) OF OUTER WING, BOTTOM SKIN, UPPER AND LOWER SURFACES, AROUND ACCESS DOOR CUTOUTS IN RIB BAY 2-3 AND RIB BAY 6-7

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	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
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
540AB, 540BB, 640AB, 640BB

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
TASK 28-10-00-910-001-A	Safety Procedures When You Do Work in a Fuel Tank
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-650-003-A	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-003-A-01	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-869-001-A	Fuel Transfer
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
NTM 572040
Inspection Area ** ON A/C NOT FOR ALL
Inspection Area ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 57-20-00-941-093-A

A. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(1) Obey the fuel safety precautions (Ref. AMM TASK 28-10-00-910-001).
(2) Install the 98D27803500001 LOCKING TOOL ZERO POS on the flap/slat control lever.
(3) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the flaps or slats.
(4) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.

Subtask 57-20-00-650-057-A

B. Fuel Configuration
(1) Move the fuel to another tank (Ref. AMM TASK 28-25-00-869-001) or defuel the tank (Ref. AMM TASK 28-25-00-650-001) as applicable.
(2) Drain all of the remaining fuel from the tank through the water drain valves (Ref. AMM TASK 28-25-00-650-003).

Subtask 57-20-00-010-092-A

C. Get Access

WARNING: BEFORE YOU DO WORK IN OR NEAR A FUEL TANK, MAKE SURE THAT YOU OBEY ALL THE SAFETY PROCEDURES. THIS WILL PREVENT INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.

(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below zone 540(640).
(2) Remove the access panels for the applicable wing (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 28-10-00-910-002):

for the left wing, remove 540AB 540BB
for the right wing, remove 640AB 640BB.

4. Procedure
Subtask 57-20-00-110-088-A

A. Preparation for Inspection
(1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) , made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) , to clean:

the area around the access door cutouts, rib bays 2-3 and 6-7.

Subtask 57-20-00-200-052-A

B. Special Detailed Inspection (HFEC) of Outer Wing, Bottom Skin, Upper and Lower Surfaces, Around Access Door Cutouts in Rib Bay 2-3 and Rib Bay 6-7
(1) Examine the applicable inspection area NTM 572040.

5. Close-up
Subtask 57-20-00-410-091-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panels (Ref. AMM TASK 57-27-11-400-001):

for the left wing, install 540AB 540BB
for the right wing, install 640AB 640BB.

Subtask 57-20-00-650-058-A

B. Fuel Configuration
(1) Refuel (Ref. AMM TASK 12-11-28-650-003), defuel (Ref. AMM TASK 28-25-00-650-001) or transfer fuel (Ref. AMM TASK 28-25-00-869-001) as necessary.

Subtask 57-20-00-942-094-A

C. 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 06:30:34 UTC