W DOC AIRBUS | AMM A320F

Inspection of the Tank Venting System

TASK 28-12-00-200-001-A
Inspection of the Tank Venting System

WARNING: OBEY THE FUEL SAFETY PROCEDURES.
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: DO NOT GET YOUR CLOTHES SOAKED WITH FUEL.
WARNING: MAKE SURE THAT YOU HAVE THE CORRECT FIRE FIGHTING EQUIPMENT AVAILABLE.
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: 130
ZONE: 140
ZONE: 150
ZONE: 160
ZONE: 500
ZONE: 600
1. Reason for the Job
To make sure that the tank venting system is serviceable and is not blocked.
NOTE: For the New Engine Option (NEO) aircraft with an Additional Center Tank (ACT) installed in the forward cargo compartment, the term ACT FWD can also be described as ACT 4.1.
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)
98D57004014000
2
HOOK-COVER (RIB2-SURGE DOORS)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
130
FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX
140
CENTER WING
150
AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT
160
BULK CARGO COMPARTMENT AFT BULKHEAD OF AFT CARGO COMPARTMENT TO AFT BULKHEAD OF BULK CARGO COMPARTMENT
500
LEFT WING
600
RIGHT WING
540BZ, 640BZ
147AZ
826
148AZ
 C. 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 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 28-10-00-910-002-A
Access to the Fuel Tanks and the Work Areas
TASK 28-10-00-910-003-A
Safety Procedures When You Do Work in a Dry Fuel Tank
TASK 28-11-27-000-001-A
Removal of the Additional Center Tank (ACT)
TASK 28-11-27-000-002-A
Removal of Additional Center Tank No.1 (ACT AFT1)
TASK 28-11-27-000-003-A
Removal of the Additional Center Tank No.2 (ACT AFT2)
TASK 28-11-27-400-001-A
Installation of the Additional Center Tank (ACT)
TASK 28-11-27-400-002-A
Installation of Additional Center Tank No.1 (ACT AFT1)
TASK 28-11-27-400-003-A
Installation of the Additional Center Tank No.2 (ACT AFT2)
TASK 28-11-37-000-001-A
Removal of the Inner Manhole-Cover ACT
TASK 28-11-37-000-004-A
Removal of the Outer Manhole-Cover ACT
TASK 28-11-37-400-001-A
Installation of the Inner Manhole-Cover ACT
TASK 28-11-37-400-004-A
Installation of the Outer Manhole Cover ACT
TASK 28-12-41-200-001-A
Inspection of the Overpressure Protector
TASK 28-12-41-200-002-A
Inspection of the Overpressure Protector
TASK 28-12-41-200-003-A
Inspection of the Overpressure Protector
TASK 28-12-46-200-001-A
Inspection of the Wing-Tank Overpressure Protector Outlet
TASK 28-12-47-000-001-A
Removal of the NACA Vent Intake
TASK 28-12-47-200-001-A
Visual Check of NACA Intake for Signs of Blockage
TASK 28-12-47-400-001-A
Installation of the NACA Vent Intake
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 28-25-00-650-005-A
To Drain the Remaining Fuel from the Additional Center Tank (ACT)
TASK 28-25-00-869-001-A
Fuel Transfer
TASK 57-17-11-000-001-A
Removal of Access Cover 147AZ(148AZ)
TASK 57-17-11-000-001-B
Removal of Access Cover 148AZ or/and the ACT-Equipment Support Door
TASK 57-17-11-400-001-A
Installation of Access Cover 147AZ(148AZ)
TASK 57-17-11-400-001-B
Installation of Access Cover 148AZ or/and the ACT-Equipment Support-Door
TASK 57-27-11-000-001-A
Removal of the Access Panel
TASK 57-27-11-000-002-A
Removal of the Access Panel
TASK 57-27-11-400-001-A
Installation of the Access Panel
TASK 57-27-11-400-002-A
Installation of the Access Panel
TASK 57-27-12-000-002-A
Removal of the Rib 2 Access Panel 540AZ(640AZ) or 540BZ(640BZ)
TASK 57-27-12-400-002-A
Installation of the Rib 2 Access Panel 540AZ (640AZ) or 540BZ (640BZ)
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
F Refuel Spill Pipe - Location and Detail ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 28-12-00-941-050-A ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) Obey the safety procedures (Ref. AMM TASK 28-00-00-910-001), (Ref. AMM TASK 28-10-00-910-001) and (Ref. AMM TASK 28-10-00-910-003).
   (2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
   (3) On fuel control panel 40VU and refuel/defuel control panel 800VU:
     (a) Put a WARNING NOTICE(S) in position to tell persons not to operate the refuel/defuel system.
   (4) In the cockpit, put the WARNING NOTICE(S) in position to tell persons not to operate the flight controls.
Subtask 28-12-00-941-050-B ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) Obey the safety procedures (Ref. AMM TASK 28-00-00-910-001), (Ref. AMM TASK 28-10-00-910-001) and (Ref. AMM TASK 28-10-00-910-003).
   (2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
   (3) On fuel control panel 40VU, Additional Center Tank (ACT) fuel control-panel 28VU and refuel/defuel control panels 800VU and 801VU:
     (a) Put a WARNING NOTICE(S) in position to tell persons not to operate the refuel/defuel system.
   (4) In the cockpit, put the WARNING NOTICE(S) in position to tell persons not to operate the flight controls.
Subtask 28-12-00-650-050-A ** ON A/C NOT FOR ALL
B. Fuel Configuration
   (1) Defuel the applicable fuel tank(s) (Ref. AMM TASK 28-25-00-650-001).
   (2) Drain the remaining fuel from the applicable fuel tank(s) (Ref. AMM TASK 28-25-00-650-003).
Subtask 28-12-00-650-050-B ** ON A/C NOT FOR ALL
B. Fuel Configuration
   (1) Defuel the applicable fuel tank(s) (Ref. AMM TASK 28-25-00-650-001).
   (2) Drain the remaining fuel from the applicable fuel tank(s), (Ref. AMM TASK 28-25-00-650-003) and (Ref. AMM TASK 28-25-00-650-005).
Subtask 28-12-00-010-050-B ** ON A/C NOT FOR ALL
C. Get Access
   (1) Remove all of the access panels (Ref. AMM TASK 57-27-11-000-001) (Ref. AMM TASK 57-27-11-000-002).
   (2) Safety open the applicable spring-loaded surge-door 540BZ 640BZ with the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS).
   (3) Remove the NACA vent intake (Ref. AMM TASK 28-12-47-000-001).
   (4) Remove the access panels 147AZ 148AZ (Ref. AMM TASK 57-17-11-000-001).
Subtask 28-12-00-010-050-D ** ON A/C NOT FOR ALL
C. Get Access
   (1) Remove all of the access panels (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 57-27-11-000-002).
   (2) Safety open the applicable spring-loaded surge-door 540BZ 640BZ with the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS).
   (3) Remove the NACA vent intake (Ref. AMM TASK 28-12-47-000-001).
   (4) Remove the access panel 148AZ and the ACT-Equipment Support Door (Ref. AMM TASK 57-17-11-000-001).
   (5) Open the aft cargo door 826 to get access to the ACT.
   (6) Remove the manhole cover of the ACT (Ref. AMM TASK 28-11-37-000-001).
Subtask 28-12-00-010-050-J ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the applicable wing.
   (2) Remove all the access panels (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 57-27-11-000-002).
   (3) Remove the applicable RIB2 access panels that follow:
   (4) Remove the NACA vent intake (Ref. AMM TASK 28-12-47-000-001).
   (5) Remove the applicable access cover 147AZ ( 148AZ) (Ref. AMM TASK 57-17-11-000-001).
Subtask 28-12-00-010-050-M ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the applicable wing.
   (2) Remove all the access panels (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 57-27-11-000-002).
   (3) Remove the applicable RIB2 access panels that follow:
   (4) Remove the NACA vent intake (Ref. AMM TASK 28-12-47-000-001).
   (5) Remove access cover 148AZ and the ACT-equipment support door (Ref. AMM TASK 57-17-11-000-001).
   (6) Remove the applicable ACT(s):
NOTE: It is recommended that you remove the ACT from the aircraft to do a visual inspection of the equipment from the inner side of the ACT.
     (a) Remove the manhole covers of the applicable ACT(s) (Ref. AMM TASK 28-11-37-000-001) and (Ref. AMM TASK 28-11-37-000-004).
Subtask 28-12-00-010-050-N ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the applicable wing.
   (2) Remove all the access panels (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 57-27-11-000-002).
   (3) Remove the applicable RIB2 access panels that follow:
   (4) Remove the NACA vent intake (Ref. AMM TASK 28-12-47-000-001).
   (5) Remove access cover 148AZ and the ACT-equipment support door (Ref. AMM TASK 57-17-11-000-001).
   (6) Remove the applicable ACT(s):
NOTE: It is recommended that you remove the ACT from the aircraft to do a visual inspection of the equipment from the inner side of the ACT.
     (a) Remove the manhole covers of the applicable ACT(s) (Ref. AMM TASK 28-11-37-000-001) and (Ref. AMM TASK 28-11-37-000-004).
Subtask 28-12-00-010-063-A ** ON A/C NOT FOR ALL
D. Get Access
   (1) Remove all of the access panels (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 57-27-11-000-002).
   (2) Safety open the applicable spring-loaded surge-door 540BZ 640BZ with the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS).
   (3) Remove the NACA vent intake (Ref. AMM TASK 28-12-47-000-001).
   (4) Remove access panel 148AZ and the ACT-equipment support door (Ref. AMM TASK 57-17-11-000-001).
   (5) Open the aft cargo door 826 to get access to the ACT(s).
   (6) If ACT1 is installed:
     (a) For access to the ACT components, remove the ACT manhole cover (Ref. AMM TASK 28-11-37-000-001).
   (7) If ACT2 is installed:
     (a) For access to the ACT components:
       1 Remove ACT2 to give access to the manhole cover on the rear wall of ACT1 and ACT2 (Ref. AMM TASK 28-11-27-000-001).
       2 Remove the manhole covers of ACT1 and ACT2 (Ref. AMM TASK 28-11-37-000-001), (Ref. AMM TASK 28-10-00-910-002).
4. Procedure
Subtask 28-12-00-210-050-B ** ON A/C NOT FOR ALL
A. Inspection of the Tank Venting System
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
F Refuel Spill Pipe - Location and Detail ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
   (1) Do a visual inspection of the open end of the center-tank vent-pipe at the aircraft centerline. The pipe must not be blocked.
   (2) Do a visual inspection of the open end of the wing-tank vent-inlet-duct located outboard of STA700/RIB2. The pipe must not be blocked.
   (3) Do a visual inspection of the open end of the wing-tank vent-duct and the center-tank vent-pipe. They are installed outboard of STA11664/RIB22. They must not be blocked.
   (4) Do a visual inspection of:
  • The complete wing-tank vent-duct and the wing-tank vent-inlet-duct
  • The complete center-tank vent-pipe.
    There must be no:
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
    Make sure that the ducts and the pipe are correctly sealed along their length.
   (5) Do a visual inspection of the vent pipe outboard of STA8268/RIB15. There must be no:
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
   (6) Do a visual inspection of the surge-tank vent-duct outboard of STA12277/RIB23. There must be no:
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
   (7) Do a visual inspection of the rubber check valves:
  • One installed in the center-tank vent-pipe inboard of STA0/RIB1
  • One installed in the wing-tank vent-inlet-duct outboard of STA700/RIB2
  • One installed in the vent pipe outboard of STA 8268/RIB15
  • One installed at the end of the wing-tank vent-duct inboard of STA700/RIB2
  • One installed in the spill pipe outboard of STA 8268/RIB15.
    Make sure that the valves:
  • Are not blocked
  • Will open and close correctly
  • Are attached correctly
  • Are not damaged
  • Are not corroded
  • Are closed.
    Make sure that the front edge of the check valve is horizontal.


   (8) Do a visual inspection of the overpressure protectors 46QM(47QM) (Ref. AMM TASK 28-12-41-200-003), 96QM (Ref. AMM TASK 28-12-41-200-002), 102QM(103QM) (Ref. AMM TASK 28-12-41-200-001) and the overpressure protector outlets (Ref. AMM TASK 28-12-46-200-001).
   (9) Do a visual inspection of the vent float valves:
  • One installed outboard of STA8268/RIB15
  • One installed inboard of STA8268/RIB15.
    Make sure that:
  • The valve will operate correctly
  • The valve plate will operate correctly
  • The valve closes correctly
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (10) Do a visual inspection of the spill pipe outboard of STA 7316/RIB13. There must be no:
  • Damage
  • Blockage
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
   (11) Do a visual inspection of the spill pipe diffusers installed outboard of STA 7316/RIB13. There must be no:
  • Damage
  • Blockage
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
   (12) Make sure that all of the bonding straps are correctly installed and attached (Ref. AMM TASK 20-28-00-912-802).
   (13) Do a visual inspection of the NACA vent intake (Ref. AMM TASK 28-12-47-200-001).
Subtask 28-12-00-210-050-C ** ON A/C NOT FOR ALL
A. Inspection of the Tank Venting System
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
   (1) Make a visual inspection of the open end of the center-tank vent-pipe at the aircraft centerline. The pipe must not be blocked.
   (2) Make a visual inspection of the open end of the wing-tank vent-inlet-duct located outboard of RIB2. The pipe must not be blocked.
   (3) Make a visual inspection of the open end of the wing-tank vent-duct and the center-tank vent-pipe. They are installed outboard of RIB22. They must not be blocked.
   (4) Make a visual inspection of:
  • The complete wing-tank vent-duct and the wing-tank vent-inlet-duct
  • The complete center-tank vent-pipe.
    There must be no:
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
    Make sure that the ducts and the pipe are correctly sealed along their length.
   (5) Make a visual inspection of the surge-tank vent-duct outboard of RIB23. There must be no:
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
   (6) Make a visual inspection of the rubber check valves:
  • One installed in the center-tank vent-pipe inboard of RIB1
  • One installed in the wing-tank vent-inlet-duct outboard of RIB2
  • One installed at the end of the wing-tank vent-duct inboard of RIB2.
    Make sure that the valves:
  • Are not blocked
  • Will open and close correctly
  • Are attached correctly
  • Are not damaged
  • Are not corroded
  • Are closed.
    Make sure that the front edge of the check valve is horizontal.


   (7) Make a visual inspection of the overpressure protectors 46QM(47QM) (Ref. AMM TASK 28-12-41-200-003), 96QM (Ref. AMM TASK 28-12-41-200-002) and the overpressure protector outlets (Ref. AMM TASK 28-12-46-200-001).
   (8) Make a visual inspection of the vent float valves 212QM(213QM). The float vent valves are installed inboard of RIB22.
Make sure that:
  • The valve will operate correctly
  • The valve plate will operate correctly
  • The valve closes correctly
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (9) Make a visual inspection of the clack valves 214QM(215QM) and 216QM(217QM). The clack valves are installed inboard of RIB22.
Make sure that:
  • The valve will operate correctly
  • The valve flap will operate correctly
  • The valve closes correctly
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (10) Make sure that all of the bonding straps are correctly installed and attached (Ref. AMM TASK 20-28-00-912-802).
   (11) Make a visual inspection of the NACA vent intake (Ref. AMM TASK 28-12-47-200-001).
Subtask 28-12-00-210-050-D ** ON A/C NOT FOR ALL
A. Inspection of the Tank Venting System
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
   (1) Make a visual inspection of the open end of the center-tank vent-pipe at the aircraft centerline. The pipe must not be blocked.
   (2) Make a visual inspection of the open end of the wing-tank vent-inlet-duct located outboard of RIB2. The pipe must not be blocked.
   (3) Make a visual inspection of the open end of the wing-tank vent-duct and the center-tank vent-pipe. They are installed outboard of RIB22. They must not be blocked.
   (4) Make a visual inspection of the open end of the ACT vent pipe. The ACT vent pipe is in the center tank. The pipe must not be blocked.
   (5) Make a visual inspection of the open end of the ACT vent pipe. The ACT vent pipe is in the ACT. The pipe must not be blocked.
   (6) Make a visual inspection of:
  • The complete wing-tank vent-duct and the wing-tank vent-inlet-duct
  • The complete center-tank vent-pipe.
    There must be no:
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
Make sure that the ducts and the pipe are correctly sealed along their length.
   (7) Make a visual inspection of the surge-tank vent-duct outboard of RIB23. There must be no:
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
   (8) Make a visual inspection of the rubber check valves:
  • One installed in the center-tank vent-pipe inboard of RIB1
  • One installed in the wing-tank vent-inlet-duct outboard of RIB2
  • One installed at the end of the wing-tank vent-duct inboard of RIB2
  • One installed at the end of the ACT vent pipe in the ACT.
    Make sure that the valves:
  • Are not blocked
  • Will open and close correctly
  • Are attached correctly
  • Are not damaged
  • Are not corroded
  • Are closed.
    Make sure that the front edge of the check valve is horizontal.


   (9) Make a visual inspection of the overpressure protectors 46QM(47QM) (Ref. AMM TASK 28-12-41-200-003), 96QM (Ref. AMM TASK 28-12-41-200-002) and the overpressure protector outlets (Ref. AMM TASK 28-12-46-200-001).
   (10) Make a visual inspection of the overpressure protector 170QM1 in the ACT.
Make sure that:
  • The burst disc is not broken.
    There must be no:
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
   (11) Make a visual inspection of the vent float valves 212QM(213QM). The float vent valves are installed inboard of RIB22.
Make sure that:
  • The valve will operate correctly
  • The valve plate will operate correctly
  • The valve closes correctly
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (12) Make a visual inspection of the clack valves 214QM(215QM) and 216QM(217QM). The clack valves are installed inboard of RIB22.
Make sure that:
  • The valve will operate correctly
  • The valve flap will operate correctly
  • The valve closes correctly
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • there is no distortion.
   (13) Make sure that all of the bonding straps are correctly installed and attached (Ref. AMM TASK 20-28-00-912-802).
   (14) Make a visual inspection of the NACA vent intake (Ref. AMM TASK 28-12-47-200-001).
   (15) Make a visual inspection of the inward pressure relief valve 172QM1.
Make sure that:
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (16) Make a visual inspection of the ACT vent pipe.
Make sure that:
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
Subtask 28-12-00-210-050-J ** ON A/C NOT FOR ALL
A. Inspection of the Tank Venting System
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
   (1) Make a visual inspection of the open end of the center-tank vent-pipe at the aircraft centerline. The pipe must not be blocked.
   (2) Make a visual inspection of the open end of the wing-tank vent-inlet-duct installed outboard of RIB2. The pipe must not be blocked.
   (3) Make a visual inspection of the open end of the wing-tank vent-duct and the center-tank vent-pipe. They are installed outboard of RIB22. They must not be blocked.
   (4) Make a visual inspection of the open end of the ACT vent pipe. The ACT vent pipe is in the center tank. The pipe must not be blocked.
   (5) Make a visual inspection of the open end of each ACT vent pipe. There is an ACT vent pipe in each installed ACT. The pipes must not be blocked.
   (6) Make a visual inspection of:
     (a) The wing-tank vent-duct and the wing-tank vent-inlet-duct.
     (b) The center-tank vent-pipe.
     (c) Make sure that:
  • There are no large dents
  • There are no cracks
  • There is no distortion
  • There is no corrosion
  • The ducts and the pipe are correctly sealed along their length.
   (7) Make a visual inspection of the surge-tank vent-duct outboard of RIB23:
     (a) Make sure that:
  • There are no large dents
  • There are no cracks
  • There is no distortion
  • There is no corrosion.
   (8) Make a visual inspection of the rubber check valves:
     (a) One installed in the center-tank vent-pipe inboard of RIB1.
     (b) One installed in the center-tank vent-pipe before the ACT vent valve 234QM.
     (c) One installed in the wing-tank vent-inlet-duct outboard of RIB2.
     (d) One installed at the end of the wing-tank vent-duct inboard of RIB2.
     (e) One installed at the end of each ACT vent pipe in each installed ACT.
     (f) Make sure that the valves:
  • Are not blocked
  • Will open and close correctly
  • Are attached correctly
  • Are not damaged
  • Are not corroded
  • Are closed.
     (g) Make sure that the front edge of the check valve is horizontal.
   (9) Make a visual inspection of the overpressure protectors 46QM (47QM) (Ref. AMM TASK 28-12-41-200-003), 96QM (Ref. AMM TASK 28-12-41-200-002) and the overpressure protector outlets (Ref. AMM TASK 28-12-46-200-001).
   (10) Make a visual inspection of the overpressure protectors 256QM, 257QM and 258QM (if the ACT FWD is installed).
   (11) Make a visual inspection of the vent float valves 212QM (213QM), installed inboard of RIB22:
     (a) Make sure that:
  • The valve will operate correctly
  • The valve plate will operate correctly
  • The valve closes correctly
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (12) Make a visual inspection of the clack valves 214QM (215QM) and 216QM (217QM), installed inboard of RIB22:
     (a) Make sure that:
  • The valve will operate correctly
  • The valve flap will operate correctly
  • The valve closes correctly
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (13) Make sure that all of the bonding straps are correctly installed and attached (Ref. AMM TASK 20-28-00-912-802).
   (14) Make a visual inspection of the NACA vent intake (Ref. AMM TASK 28-12-47-200-001).
   (15) If the ACT AFT1 is installed, make a visual inspection of the inward pressure relief valve 229QM1:
     (a) Make sure that:
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (16) If the ACT AFT2 is installed, make a visual inspection of the inward pressure relief valve 229QM2:
     (a) Make sure that:
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (17) If the ACT FWD is installed, make a visual inspection of the inward pressure relief valve 229QM4:
     (a) Make sure that:
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (18) Make a visual inspection of the ACT vent pipes:
     (a) Make sure that:
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
Subtask 28-12-00-210-050-K ** ON A/C NOT FOR ALL
A. Inspection of the Tank Venting System
   (1) Do a visual inspection of the open end of the center-tank vent-pipe at the aircraft centerline. The pipe must not be blocked.
   (2) Do a visual inspection of the open end of the wing-tank vent-inlet-duct located outboard of STA700/RIB2. The pipe must not be blocked.
   (3) Do a visual inspection of the open end of the wing-tank vent-duct and the center-tank vent-pipe. They are installed outboard of STA11664/RIB22. They must not be blocked.
   (4) Do a visual inspection of:
  • The complete wing-tank vent-duct and the wing-tank vent-inlet-duct
  • The complete center-tank vent-pipe.
    There must be no:
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
    Make sure that the ducts and the pipe are correctly sealed along their length.
   (5) Do a visual inspection of the vent pipe outboard of STA8268/RIB15. There must be no:
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
   (6) Do a visual inspection of the surge-tank vent-duct outboard of STA12277/RIB23. There must be no:
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
   (7) Do a visual inspection of the rubber check valves:
  • One installed in the center-tank vent-pipe inboard of STA0/RIB1
  • One installed in the wing-tank vent-inlet-duct outboard of STA700/RIB2
  • One installed in the vent pipe outboard of STA 8268/RIB15
  • One installed at the end of the wing-tank vent-duct inboard of STA700/RIB2
  • One installed in the spill pipe outboard of STA 8268/RIB15.
    Make sure that the valves:
  • Are not blocked
  • Will open and close correctly
  • Are attached correctly
  • Are not damaged
  • Have no sign of corrosion
  • Are closed.
    Make sure that the front edge of the check valve is horizontal.


   (8) Do a visual inspection of overpressure protectors 46QM(47QM) (Ref. AMM TASK 28-12-41-200-003), 96QM (Ref. AMM TASK 28-12-41-200-002), 102QM(103QM) (Ref. AMM TASK 28-12-41-200-001) and the overpressure protector outlets (Ref. AMM TASK 28-12-46-200-001).
   (9) Do a visual inspection of the vent float valves:
  • One installed inboard of STA8268/RIB15.
    Make sure that:
  • The valve will operate correctly
  • The valve plate will operate correctly
  • The valve closes correctly
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (10) Do a visual inspection of the spill pipe outboard of STA 7316/RIB13. There must be no:
  • Damage
  • Blockage
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
   (11) Do a visual inspection of the spill pipe diffusers installed outboard of STA 7316/RIB13. There must be no:
  • Damage
  • Blockage
  • Large dents
  • Cracks
  • Distortion
  • Corrosion.
   (12) Make sure that all of the bonding straps are correctly installed and attached (Ref. AMM TASK 20-28-00-912-802).
   (13) Do a visual inspection of the NACA vent intake (Ref. AMM TASK 28-12-47-200-001).
Subtask 28-12-00-210-050-M ** ON A/C NOT FOR ALL
A. Inspection of the Tank Venting System
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
   (1) Make a visual inspection of the open end of the center-tank vent pipe at the aircraft centerline. The pipe must not be blocked.
   (2) Make a visual inspection of the open end of the wing-tank vent inlet-duct installed outboard of RIB2. The pipe must not be blocked.
   (3) Make a visual inspection of the open end of the wing-tank vent duct and the center-tank vent pipe. They are installed outboard of RIB22. They must not be blocked.
   (4) Make a visual inspection of the open end of the ACT vent pipe. The ACT vent pipe is in the center tank. The pipe must not be blocked.
   (5) Make a visual inspection of the open end of each ACT vent pipe. There is an ACT vent pipe in each installed ACT. The pipes must not be blocked.
   (6) Make a visual inspection of:
     (a) The wing-tank vent duct and the wing-tank vent inlet-duct.
     (b) The center-tank vent pipe.
     (c) Make sure that:
  • There are no large dents
  • There are no cracks
  • There is no distortion
  • There is no corrosion
  • The ducts and the pipe are correctly sealed along their length.
   (7) Make a visual inspection of the surge-tank vent duct outboard of RIB23:
     (a) Make sure that:
  • There are no large dents
  • There are no cracks
  • There is no distortion
  • There is no corrosion.
   (8) Make a visual inspection of the rubber check valves:
     (a) One installed in the center-tank vent pipe inboard of RIB1.
     (b) One installed in the center-tank vent pipe before the ACT vent valve 234QM.
     (c) One installed in the wing-tank vent inlet-duct outboard of RIB2.
     (d) One installed at the end of the wing-tank vent duct inboard of RIB2.
     (e) One installed at the end of each ACT vent pipe in each installed ACT.
     (f) Make sure that the valves:
  • Are not blocked
  • Will open and close correctly
  • Are attached correctly
  • Are not damaged
  • Are not corroded
  • Are closed.
     (g) Make sure that the front edge of the check valve is horizontal.
   (9) Make a visual inspection of the overpressure protectors 46QM (47QM) (Ref. AMM TASK 28-12-41-200-003), 96QM (Ref. AMM TASK 28-12-41-200-002) and the overpressure protector outlets (Ref. AMM TASK 28-12-46-200-001).
   (10) Make a visual inspection of the overpressure protector 256QM.
   (11) Make a visual inspection of the vent float valves 212QM (213QM), installed inboard of RIB22:
     (a) Make sure that:
  • The valve will operate correctly
  • The valve plate will operate correctly
  • The valve closes correctly
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (12) Make a visual inspection of the clack valves 214QM (215QM) and 216QM (217QM), installed inboard of RIB22:
     (a) Make sure that:
  • The valve will operate correctly
  • The valve flap will operate correctly
  • The valve closes correctly
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (13) Make sure that all the bonding straps are correctly installed and attached (Ref. AMM TASK 20-28-00-912-802).
   (14) Make a visual inspection of the NACA vent intake (Ref. AMM TASK 28-12-47-200-001).
   (15) If ACT AFT1 is installed, make a visual inspection of inward pressure-relief-valve 229QM1:
     (a) Make sure that:
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (16) If ACT AFT2 is installed, make a visual inspection of inward pressure-relief-valve 229QM2:
     (a) Make sure that:
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (17) Make a visual inspection of the ACT vent pipes:
     (a) Make sure that:
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
Subtask 28-12-00-210-060-A ** ON A/C NOT FOR ALL
B. Inspection of the Tank Venting System
F Tank Venting System ** ON A/C NOT FOR ALL
F Tank Venting System ** ON A/C NOT FOR ALL
   (1) Make a visual inspection of the open end of the center-tank vent-pipe at the aircraft centerline. The pipe must not be blocked.
   (2) Make a visual inspection of the open end of the wing-tank vent-inlet-duct installed outboard of RIB2. The pipe must not be blocked.
   (3) Make a visual inspection of the open end of the wing-tank vent-duct and the center-tank vent-pipe. They are installed outboard of RIB22. They must not be blocked.
   (4) Make a visual inspection of the open end of the ACT vent pipe. The ACT vent pipe is in the center tank. The pipe must not be blocked.
   (5) Make a visual inspection of the open end of each ACT vent pipe. There is an ACT vent pipe in each installed ACT. The pipes must not be blocked.
   (6) Make a visual inspection of:
     (a) The complete wing-tank vent-duct and the wing-tank vent-inlet-duct.
     (b) The complete center-tank vent-pipe.
     (c) Make sure that:
  • There are no large dents
  • There are no cracks
  • There is no distortion
  • There is no corrosion
  • The ducts and the pipe are correctly sealed along their length.
   (7) Make a visual inspection of the surge-tank vent-duct outboard of RIB23:
     (a) Make sure that:
  • There are no large dents
  • There are no cracks
  • There is no distortion
  • There is no corrosion.
   (8) Make a visual inspection of the rubber check valves:
     (a) One installed in the center-tank vent-pipe inboard of RIB1.
     (b) One installed in the wing-tank vent-inlet-duct outboard of RIB2.
     (c) One installed at the end of the wing-tank vent-duct inboard of RIB2.
     (d) One installed at the end of each ACT vent pipe in each installed ACT.
     (e) Make sure that the valves:
  • Are not blocked
  • Will open and close correctly
  • Are attached correctly
  • Are not damaged
  • Are not corroded
  • Are closed.
     (f) Make sure that the front edge of the check valve is horizontal.
   (9) Make a visual inspection of the overpressure protectors 46QM(47QM) (Ref. AMM TASK 28-12-41-200-003), 96QM (Ref. AMM TASK 28-12-41-200-002) and the overpressure protector outlets (Ref. AMM TASK 28-12-46-200-001).
   (10) Make a visual inspection of the vent float valves 212QM(213QM), installed inboard of RIB22:
     (a) Make sure that:
  • The valve will operate correctly
  • The valve plate will operate correctly
  • The valve closes correctly
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (11) Make a visual inspection of the clack valves 214QM(215QM) and 216QM(217QM), installed inboard of RIB22:
     (a) Make sure that:
  • The valve will operate correctly
  • The valve flap will operate correctly
  • The valve closes correctly
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (12) If the ACT1 is installed, make a visual inspection of the overpressure protector 170QM1:
     (a) Make sure that:
  • The burst disc is not broken
  • There are no large dents
  • There are no cracks
  • There is no distortion
  • There is no corrosion.
   (13) If the ACT2 is installed, make a visual inspection of the overpressure protector 170QM2:
     (a) Make sure that:
  • The burst disc is not broken
  • There are no large dents
  • There are no cracks
  • There is no distortion
  • There is no corrosion.
   (14) Make sure that all of the bonding straps are correctly installed and attached (Ref. AMM TASK 20-28-00-912-802).
   (15) Make a visual inspection of the NACA vent intake (Ref. AMM TASK 28-12-47-200-001).
   (16) If the ACT1 is installed, make a visual inspection of the inward pressure relief valve 172QM1:
     (a) Make sure that:
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (17) If the ACT2 is installed, make a visual inspection of the inward pressure relief valve 172QM2:
     (a) Make sure that:
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
   (18) Make a visual inspection of the ACT vent pipes:
     (a) Make sure that:
  • There is no corrosion
  • There are no cracks
  • There are no large dents
  • There is no distortion.
5. Close-up
Subtask 28-12-00-410-050-B ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Remove the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) and carefully close the surge door:
  • for the left wing, surge door 540BZ
  • for the right wing, surge door 640BZ.
   (3) Install the NACA vent intake (Ref. AMM TASK 28-12-47-400-001).
   (4) Install all of the access panels (Ref. AMM TASK 57-27-11-400-001), (Ref. AMM TASK 57-27-11-400-002).
   (5) Install the access panels 147AZ 148AZ, (Ref. AMM TASK 57-17-11-400-001).
Subtask 28-12-00-410-050-D ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the manhole cover of the ACT (Ref. AMM TASK 28-11-37-400-001).
   (3) Install the NACA vent intake (Ref. AMM TASK 28-12-47-400-001).
   (4) Remove the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) and carefully close the surge door:
  • for the left wing, surge door 540BZ
  • for the right wing, surge door 640BZ.
   (5) Install all of the access panels (Ref. AMM TASK 57-27-11-400-001), (Ref. AMM TASK 57-27-11-400-002) and (Ref. AMM TASK 28-11-37-400-001).
   (6) Install the access panel 148AZ and the ACT-Equipment Support Door (Ref. AMM TASK 57-17-11-400-001).
Subtask 28-12-00-410-050-J ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the applicable access cover 147AZ ( 148AZ) (Ref. AMM TASK 57-17-11-400-001).
   (3) Install the NACA vent intake (Ref. AMM TASK 28-12-47-400-001).
   (4) Install the applicable RIB2 access panels that follow:
   (5) Install all the access panels (Ref. AMM TASK 57-27-11-400-001) and (Ref. AMM TASK 57-27-11-400-002).
Subtask 28-12-00-410-050-N ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the manhole covers of the applicable ACT(s) (Ref. AMM TASK 28-11-37-400-001) and (Ref. AMM TASK 28-11-37-400-004).
   (3) Install the applicable ACT(s):
   (4) Install access cover 148AZ and the ACT-equipment support door (Ref. AMM TASK 57-17-11-400-001).
   (5) Install the NACA vent intake (Ref. AMM TASK 28-12-47-400-001).
   (6) Install the applicable RIB2 access panels that follow:
   (7) Install all the access panels (Ref. AMM TASK 57-27-11-400-001) and (Ref. AMM TASK 57-27-11-400-002).
Subtask 28-12-00-410-050-O ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the manhole covers of the applicable ACT(s) (Ref. AMM TASK 28-11-37-400-001) and (Ref. AMM TASK 28-11-37-400-004).
   (3) Install the applicable ACT(s):
   (4) Install access cover 148AZ and the ACT-equipment support door (Ref. AMM TASK 57-17-11-400-001).
   (5) Install the NACA vent intake (Ref. AMM TASK 28-12-47-400-001).
   (6) Install the applicable RIB2 access panels that follow:
   (7) Install all the access panels (Ref. AMM TASK 57-27-11-400-001) and (Ref. AMM TASK 57-27-11-400-002).
Subtask 28-12-00-410-061-A ** ON A/C NOT FOR ALL
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) If ACT1 is installed:
     (a) Install the manhole covers of ACT1 (Ref. AMM TASK 28-11-37-400-001).
   (3) If ACT2 is installed:
     (a) Install the manhole covers of ACT1 and ACT2 (Ref. AMM TASK 28-11-37-400-001).
     (b) Install ACT2 (Ref. AMM TASK 28-11-27-400-001).
   (4) Close aft cargo-compartment door 826.
   (5) Install the NACA vent intake (Ref. AMM TASK 28-12-47-400-001).
   (6) Remove the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) and carefully close the surge door:
  • for the left wing, surge door 540BZ
  • for the right wing, surge door 640BZ.
   (7) Install all the access panels (Ref. AMM TASK 57-27-11-400-001), (Ref. AMM TASK 57-27-11-400-002) and (Ref. AMM TASK 28-11-37-400-001).
   (8) Install access panel 148AZ and the ACT-equipment support door (Ref. AMM TASK 57-17-11-400-001).
Subtask 28-12-00-650-051-A
C. Fuel Configuration
   (1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 12-11-28-650-003), (Ref. AMM TASK 28-25-00-650-001) or (Ref. AMM TASK 28-25-00-869-001).
Subtask 28-12-00-942-051-A
D. Removal of the Equipment
   (1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
   (2) Make sure that the work area is clean and clear of tools and other items.
   (3) Remove the access platform(s).
   (4) Remove the WARNING NOTICE(S).
   (5) Remove the SAFETY BARRIERS.
[Rev.10 from 2021] 2026.04.02 07:02:01 UTC
"AVIABRAIN" 2025