Installation of Access Cover 148AZ or/and the ACT-Equipment Support-Door

TASK 57-17-11-400-001-B
Installation of Access Cover 148AZ or/and the ACT-Equipment Support-Door

WARNING: THIS PROCEDURE USES A FUEL SYSTEM ITEM THAT IS IN A CATEGORY KNOWN AS A CRITICAL DESIGN CONFIGURATION CONTROL LIMITATION (CDCCL). CDCCL IDENTIFIES AN ITEM THAT CAN BE THE SOURCE OF A POSSIBLE FUEL TANK IGNITION. YOU MUST KEEP ALL CDCCL ITEMS IN THE APPROVED CONFIGURATION. DAMAGE, WEAR OR CHANGES TO A CDCCL ITEM CAN CAUSE A POSSIBLE FUEL TANK EXPLOSION.

WARNING: MAKE SURE THAT YOU HAVE THE CORRECT FIRE FIGHTING EQUIPMENT AVAILABLE.

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.

WARNING: BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES. IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER. IF NECESSARY, GET MEDICAL HELP. AIRCRAFT FUEL IS POISONOUS.

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

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

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	Torque wrench: range to between 0.9 and 0.8 m.daN (79.65 and 70.80 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06AAC1)	Polysulfide Sealant-General Purpose Interfay -
(Material No.06CDD1)	Silicone Adhesive Sealant-Solvant Resistant One part -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
12	SEAL	AIPC 57-17-11-01-030
33	SEAL	AIPC 57-17-11-01-030

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-10-00-910-001-A	Safety Procedures When You Do Work in a Fuel Tank
TASK 28-21-00-710-008-A	Operational Check of Air Release Valves to Ensure Adequate Fuel Flow Under Suction Feed Conditions
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 28-25-52-400-003-A	Installation of the Additional Center Tank (ACT) Refuel-Valve Canister
TASK 28-28-11-400-001-A	Installation of the ACT Fuel-Transfer-Pump Pressure-Switch
TASK 28-28-31-400-001-A	Installation of the ACT Fuel-Transfer-Pump Mounting-Plate
TASK 28-28-33-400-001-A	Installation of the ACT Fuel Transfer-Valve
TASK 28-42-00-740-001-A	Status Report (BITE)
TASK 28-46-00-740-001-A	Functional (BITE) Test
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
TASK 57-17-11-400-003-A	Installation of the Protective Cover of the ACT-Equipment Support Door
TASK 71-00-00-710-003-B	Engine Automatic Start
TASK 71-00-00-710-004-B	Engine Manual Start
Access Cover 148AZ
ACT-Equipment Support Door
Seals of Access Cover 148AZ and the ACT-Equipment Support Door
Warning Placards on the Center Wing BOX

3. Job Set-up
Subtask 57-17-11-860-052-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at zone 147 or 148.
(2) Make sure that the MLG doors are open and the safety devices installed (Ref. AMM TASK 32-12-00-010-001).
(3) Make sure that the fuel safety procedures are obeyed (Ref. AMM TASK 28-00-00-910-001), (Ref. AMM TASK 28-10-00-910-001).
(4) Make sure that the center tank is defueled (Ref. AMM TASK 28-25-00-650-001) and the fuel is moved into a different tank (Ref. AMM TASK 28-25-00-869-001).
(5) Make sure that the remaining fuel is drained (Ref. AMM TASK 28-25-00-650-003).

Subtask 57-17-11-865-067-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FUEL/X FEED/VALVE/MOT1	2QE	A12
** ON A/C NOT FOR ALL
121VU	FUEL/RFL/DFL/SPLY	2QU	L24
121VU	FUEL/RFL/DFL/XFR/DEFUEL/VALVE	1QU	L23
** ON A/C NOT FOR ALL
121VU	FUEL/L WING TK/PUMP2 SPLY	7QA	N26
121VU	FUEL/L WING TK/PUMP1 SPLY	1QA	N23
121VU	FUEL/R WING TK/PUMP2 SPLY	8QA	Q26
121VU	FUEL/R WING TK/PUMP1 SPLY	2QA	Q23
** ON A/C NOT FOR ALL
121VU	FUEL/RFL/DFL/SPLY	2QU	L23
121VU	FUEL/RFL/DFL/XFR/DEFUEL/VALVE	1QU	L22

Subtask 57-17-11-865-057-A

DELETED

4. Procedure
Subtask 57-17-11-914-052-A ** ON A/C NOT FOR ALL

A. Preparation for Installation

Access Cover 148AZ ** ON A/C NOT FOR ALL

ACT-Equipment Support Door ** ON A/C NOT FOR ALL

(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Use Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the contact surface of the seals (12) and (33), the access cover (11) and the ACT equipment support-door (34).
(5) Use Textile-Lint free Cotton - (Material No.14SBA1) and Silicone Adhesive Sealant-Solvant Resistant One part - (Material No.06CDD1) ) to clean the contact surface of the fittings (24), (31) and (41), the access cover (11) and the ACT equipment support-door (34).
(6) Apply Silicone Adhesive Sealant-Solvant Resistant One part - (Material No.06CDD1) on new AIPC 57-17-11-01-030 SEAL (12) and new AIPC 57-17-11-01-030 SEAL (33).
(7) Install:
(a) The seal (12) on the access cover (11)
(b) The seal (33) on the ACT equipment support-door (34).
(8) Make sure that the seals (12) and (33) are correctly installed in their grooves and in correct orientation.

Seals of Access Cover 148AZ and the ACT-Equipment Support Door ** ON A/C NOT FOR ALL

(9) Use Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the surface around the seals (12) and (33) to remove the unwanted sealant.

Subtask 57-17-11-210-056-A ** ON A/C NOT FOR ALL

B. Bonding Strip Integrity Check
(1) Do an inspection of the bonding strips in the center wing box. Make sure that they are:

correctly installed
not corroded
not damaged.

NOTE: If necessary, replace the bonding strips (Ref. AMM TASK 20-28-00-912-802) or (Ref. AMM TASK 20-28-00-912-802).

Subtask 57-17-11-420-053-B ** ON A/C NOT FOR ALL

C. Installation of Access Cover 148AZ

Access Cover 148AZ ** ON A/C NOT FOR ALL

WARNING: MAKE SURE THAT THE WARNING/CAUTION PLACARDS ARE INSTALLED AND YOU CAN EASILY READ THEM. THESE PLACARDS TELL PERSONS THAT THERE IS A POSSIBLE LOW OXYGEN CONTENT IN:

THE AREA BEHIND THE ACCESS PANEL(S)
THE ADJACENT AREAS WHEN THE ACCESS PANEL(S) IS(ARE) OPEN.

IF THE PLACARDS ARE DAMAGED, MISSING OR PAINTED OVER, YOU MUST REPLACE THEM. THESE PLACARDS ARE RELATED TO A CRITICAL DESIGN CONFIGURATION CONTROL LIMITATION (CDCCL).

(1) Do a visual inspection to look for placards that are:

Damaged
Missing
Painted over.

(2) Make sure that you can easily read the placard message.

Warning Placards on the Center Wing BOX ** ON A/C NOT FOR ALL

(3) If the placards are damaged, missing, painted over or you cannot easily read them, replace them at the next maintenance opportunity.

NOTE: Hold the access cover (11) in position when you install the fasteners.

(4) Install the washers (18), the washers (17) and the screws (16).
(5) TORQUE the screws (16) to between 0.9 and 0.8 m.daN (79.65 and 70.80 lbf.in )

.
(6) Do the electrical bonding when you install the bonding strip (15) (Ref. AMM TASK 20-28-00-912-802).
(7) Install the bonding strip (15), the washer (14) and the bolt (13) and tighten it.

Subtask 57-17-11-420-054-C ** ON A/C NOT FOR ALL

D. Installation of the ACT-Equipment Support Door

ACT-Equipment Support Door ** ON A/C NOT FOR ALL

WARNING: MAKE SURE THAT THE WARNING/CAUTION PLACARDS ARE INSTALLED AND YOU CAN EASILY READ THEM. THESE PLACARDS TELL PERSONS THAT THERE IS A POSSIBLE LOW OXYGEN CONTENT IN:

THE AREA BEHIND THE ACCESS PANEL(S)
THE ADJACENT AREAS WHEN THE ACCESS PANEL(S) IS(ARE) OPEN.

IF THE PLACARDS ARE DAMAGED, MISSING OR PAINTED OVER, YOU MUST REPLACE THEM. THESE PLACARDS ARE RELATED TO A CRITICAL DESIGN CONFIGURATION CONTROL LIMITATION (CDCCL).

(1) Do a visual inspection to look for placards that are:

Damaged
Missing
Painted over.

(2) Make sure that you can easily read the placard message.

Warning Placards on the Center Wing BOX ** ON A/C NOT FOR ALL

(3) If the placards are damaged, missing, painted over or you cannot easily read them, replace them at the next maintenance opportunity.
(4) Apply Polysulfide Sealant-General Purpose Interfay - (Material No.06AAC1) on the contact surface of the fittings (24), (31) and (41) with the ACT-equipment support door (34).
(5) Put the ACT-equipment support door ((34) and the fittings (24), (31) and (34) in position on the frame.

NOTE: Hold the ACT-equipment support door (34) and the fittings (24), (31) and (41) in position when you install the fasteners.

(6) Install the washers (23), the washers (22) and the screws (21).
(7) TORQUE the screws (21) to between 0.9 and 0.8 m.daN (79.65 and 70.80 lbf.in )

.
(8) Remove the unwanted sealant with Non Aqueous Cleaner-General - - (Material No.08BAA9) and with Textile-Lint free Cotton - (Material No.14SBA1) .
(9) Install the bonding strip (29), the washer (32) and the bolt (30) and tighten it.
(10) You must do the electrical bonding when you install the bonding strip (29) (Ref. AMM TASK 20-28-00-912-802).
(11) Install the bonding strips (25) and (28), the washer (26) and the bolt (27) and tighten it.
(12) Do the electrical bonding when you install the bonding strips (25) and (28) (Ref. AMM TASK 20-28-00-912-802).
(13) Install the bonding strip (38), the washer (40) and the bolt (39) and tighten it.
(14) Do the electrical bonding when you install the bonding strip (38) (Ref. AMM TASK 20-28-00-912-802).
(15) Install the bonding strips (37) and (38), the washer (35) and the bolt (36) and tighten it.
(16) Do the electrical bonding when you install the bonding strips (37) and (38) (Ref. AMM TASK 20-28-00-912-802).
(17) Install the following components:

the fuel transfer pump 163QM (Ref. AMM TASK 28-28-31-400-001)
the refuel valve canister 164QM (Ref. AMM TASK 28-25-52-400-003)
the fuel transfer valve 165QM (Ref. AMM TASK 28-28-33-400-001)
the pressure switch 2QH (Ref. AMM TASK 28-28-11-400-001).

(18) Install the protective cover (Ref. AMM TASK 57-17-11-400-003).

Subtask 57-17-11-865-068-A ** ON A/C NOT FOR ALL

E. 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	FUEL/X FEED/VALVE/MOT1	2QE	A12
** ON A/C NOT FOR ALL
121VU	FUEL/RFL/DFL/SPLY	2QU	L24
121VU	FUEL/RFL/DFL/XFR/DEFUEL/VALVE	1QU	L23
** ON A/C NOT FOR ALL
121VU	FUEL/L WING TK/PUMP2 SPLY	7QA	N26
121VU	FUEL/L WING TK/PUMP1 SPLY	1QA	N23
121VU	FUEL/R WING TK/PUMP2 SPLY	8QA	Q26
121VU	FUEL/R WING TK/PUMP1 SPLY	2QA	Q23
** ON A/C NOT FOR ALL
121VU	FUEL/RFL/DFL/SPLY	2QU	L23
121VU	FUEL/RFL/DFL/XFR/DEFUEL/VALVE	1QU	L22

Subtask 57-17-11-865-058-A

DELETED

Subtask 57-17-11-740-051-A ** ON A/C NOT FOR ALL

G. BITE Test
(1) Do a BITE test of the FQI system (Ref. AMM TASK 28-42-00-740-001).
(2) Do a BITE test of the FLSS system (Ref. AMM TASK 28-46-00-740-001).

NOTE: Those tests are only applicable if you do a maintenance work in the center wing-box area.

Subtask 57-17-11-650-054-A ** ON A/C NOT FOR ALL

H. Fueling
(1) Fill the center tank to the maximum level (Ref. AMM TASK 12-11-28-650-003)

Subtask 57-17-11-210-053-A ** ON A/C NOT FOR ALL

I. Aircraft Maintenance Configuration
(1) If you did a fuel tank repair and there is a risk of remaining unwanted material in the tank:
(a) Start the engine and let it operate to flush the contamination from the fuel tank, (Ref. AMM TASK 71-00-00-710-003) or (Ref. AMM TASK 71-00-00-710-004).
(b) For ETOPS only, do the operational check of the air release valves (Ref. AMM TASK 28-21-00-710-008) at scheduled intervals (Refer to MPD 282100-03 for scheduled intervals).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 57-17-11-210-054-A ** ON A/C NOT FOR ALL

J. Leak Inspection
(1) Do a visual inspection of access cover 148AZ and at the ACT-equipment support door.
(2) Make sure that there are no leaks.

5. Close-up
Subtask 57-17-11-410-052-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Remove the safety devices and close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(4) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.02 06:30:33 UTC