Detailed Inspection of Coupling Refuel/Defuel

TASK 28-25-41-200-001-A
Detailed Inspection of Coupling Refuel/Defuel

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.

ZONE: 522
ZONE: 622

1. Reason for the Job
Refer to the MPD TASK: 282541-01
DETAILED INSPECTION OF COUPLING REFUEL/DEFUEL.
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	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
522	OUTBOARD FIXED L.E STRUCTURE
622	OUTBOARD FIXED L.E STRUCTURE
622HB
522HB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-25-41-000-001-A	Removal of the Refuel/Defuel Coupling/Cap
TASK 28-25-41-000-005-A	Removal of the Refuel/Defuel Coupling-Element Assembly
TASK 28-25-41-400-005-A	Installation of the Refuel/Defuel Coupling/Cap
TASK 28-25-41-400-006-A	Installation of the Refuel/Defuel Coupling Element-Assembly
Refuel/Defuel Coupling Cap 40QM/41QM. ** ON A/C NOT FOR ALL
Refuel/Defuel Coupling Cap 100QM(40QM)/101QM(41QM). ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-25-41-941-057-A

A. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(1) You must obey the fuel safety procedures when you do work on the fuel system (Ref. AMM TASK 28-00-00-910-001).
(2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.

Subtask 28-25-41-865-050-A

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B06
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B01
** ON A/C ALL
121VU	FLIGHT CONTROLS/SLT/CTL/SYS2	7CV	R21

Subtask 28-25-41-010-056-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE below the applicable refuel/defuel coupling.
(2) Remove the refuel/defuel coupling cap (6) from the refuel/defuel coupling (1).
(3) Remove the access panel 522HB ( 622HB).

Subtask 28-25-41-010-056-B ** ON A/C NOT FOR ALL

4. Procedure
Subtask 28-25-41-210-054-B

A. Detailed Inspection of Coupling Refuel/Defuel
(1) Examine the refuel/defuel coupling cap (6) and the chain (7) for their correct condition:
(a) Make sure that the chain (7) is correctly attached.
(b) If you find corrosion or damage:
1 Remove the refuel/defuel coupling cap (6) and the chain (7) (Ref. AMM TASK 28-25-41-000-001).
2 Send the refuel/defuel coupling cap (6) and the chain (7) to the workshop.
3 Install the refuel/defuel coupling cap (6) and the chain (7) (Ref. AMM TASK 28-25-41-400-005).
(2) Examine the refuel/defuel coupling assembly (1) for corrosion and damage:
(a) If you find corrosion or damage:
1 Remove the refuel/defuel coupling assembly (1) (Ref. AMM TASK 28-25-41-000-001).
2 Send the refuel/defuel coupling assembly (1) to the workshop.
3 Install the refuel/defuel coupling assembly (1) (Ref. AMM TASK 28-25-41-400-005).
(b) If you find scratches or scores, make sure that they do not extend to the sealing face.

NOTE: Scratches or scores to the valve head (8) are permitted.

(3) Measure the thickness of the lugs (DIM x) on the coupling jaw ring (3).
(4) Make sure that it is more than 5.842 mm (0.2300 in.).
(5) If the dimension is not correct, replace the coupling element assembly (Ref. AMM TASK 28-25-41-000-005) and (Ref. AMM TASK 28-25-41-400-006).
(6) Examine the shroud (4), the shroud backing plate (5) and the shroud support ring (2) for their correct condition.
(7) Examine the front spar around the refuel/defuel coupling (1) for signs of fuel leaks.
(8) Make sure that the paint and other protective treatments on and around the refuel/defuel coupling (1) are in good condition.

5. Close-up
Subtask 28-25-41-410-055-A ** ON A/C NOT FOR ALL

A. Close Access

CAUTION: MAKE SURE THAT THE HANDLE OF THE REFUEL COUPLING CAP POINTS AFT WHEN THE CAP IS CLOSED AND LOCKED.

(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the refuel/defuel coupling cap (6).
(3) Install the access panel 522HB ( 622HB).

Subtask 28-25-41-410-055-B ** ON A/C NOT FOR ALL

A. Close Access

CAUTION: MAKE SURE THAT THE HANDLE OF THE REFUEL COUPLING CAP POINTS AFT WHEN THE CAP IS CLOSED AND LOCKED.

(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the refuel/defuel coupling cap (6).
(3) Install the access panel 622HB.

Subtask 28-25-41-865-051-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B06
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B01
** ON A/C ALL
121VU	FLIGHT CONTROLS/SLT/CTL/SYS2	7CV	R21

Subtask 28-25-41-942-054-A

C. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:17:40 UTC