W DOC AIRBUS | AMM A320F

Removal of the Fuel Pumps

TASK 28-21-51-000-001-A
Removal of the Fuel Pumps

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.
CAUTION: WHEN YOU REPLACE THE FUEL PUMP(S) 21QA(26QA) OR 25QA(22QA), EXAMINE THE APPLICABLE LANDING LIGHT ASSEMBLY FOR SIGNS OF FUEL CONTAMINATION. IF YOU FIND FUEL CONTAMINATION, EXAMINE THE ITEMS THAT FOLLOW FOR SIGNS OF FUEL LEAKAGE:
  • THE FUEL PUMP(S) 21QA(26QA) OR 25QA(22QA)
  • THE WATER DRAIN VALVE 25QM(26QM) DIRECTLY FORWARD OF THE LANDING LIGHT ASSEMBLY.
REFER TO AMM 28-11-00-06 FOR LEAKAGE LIMITS AND REPAIR AS NECESSARY. IF YOU DO NOT REPAIR THE LEAK, NO PERSONS MUST OPERATE THE APPLICABLE LANDING LIGHT UNTIL:
  • THE LEAK IS REPAIRED
  • THE LANDING LIGHT ASSEMBLY IS REPLACED.
FIN: 21QA
FIN: 22QA
FIN: 25QA
FIN: 26QA
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 3M (10 FT)
No specific
AR
CAP - BLANKING
No specific
AR
CONTAINER 3 L(3/4 USGAL)
No specific
AR
SAFETY BARRIER(S)
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
SCRAPER - PLASTIC
558-1-05903
1
EXTRACTOR - FUEL PUMP
558-1-05903-002
1
EXTRACTOR - FUEL PUMP
 B. Referenced Information
REFERENCE
DESIGNATION
TASK 28-00-00-910-001-A
Fuel Safety Procedures
TASK 28-21-00-220-001-A
Detailed Inspection of Wing Tank Fuel-Pumps for Detached Identification Labels
TASK 28-25-00-650-001-A
Pressure Defuel
TASK 33-42-11-000-001-A
Removal of the Landing Light
F Fuel Pump 21QA(26QA) and 25QA(22QA) ** ON A/C NOT FOR ALL
F Fuel Pump Extractor
F Fuel Pump 21QA(26QA) and 25QA(22QA) ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 28-21-51-941-057-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 28-21-51-865-050-A
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
FOR FIN: 25QA (PUMPFUEL NO 2, L WING TK) FOR FIN: 21QA (PUMPFUEL NO 1, L WING TK)
121VUFUEL/L WING TK/PUMP2 SPLY7QAN26
121VUFUEL/L WING TK/PUMP1 SPLY1QAN23
122VULIGHTING/LANDING LT/L/CTL3LBT05
122VULIGHTING/LANDING LT/L/SPLY1LBT04
123VUL WING TK/PUMP 1/STBY SPLY11QAAD12
FOR FIN: 26QA (PUMPFUEL NO 2, R WING TK) FOR FIN: 22QA (PUMPFUEL NO 1, R WING TK)
121VUFUEL/R WING TK/PUMP2 SPLY8QAQ26
121VUFUEL/R WING TK/PUMP1 SPLY2QAQ23
122VULIGHTING/LANDING LT/R/CTL4LBT07
122VULIGHTING/LANDING LT/R/SPLY2LBT06
123VUR WING TK/PUMP 1/STBY SPLY12QAAE12
Subtask 28-21-51-010-052-A ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put the ACCESS PLATFORM 3M (10 FT) in position below zone 540(640).
   (2) Remove the front fairing (7) and the cover-plate (5) assembly as follows:
NOTE: There can be sealant between the front fairing and the under-wing skin. If necessary, use a SCRAPER - PLASTIC to disengage the parts.
     (a) Hold the cover-plate (5) and remove the bolts (6).
     (b) Remove the cover-plate (5) and the front fairing (7) assembly from the under-wing skin.
   (3) Disconnect the electrical connector from the electrical receptacle (14).
   (4) Put CAP - BLANKING on the electrical connector and the receptacle (14).
Subtask 28-21-51-010-052-B ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put the ACCESS PLATFORM 3M (10 FT) in position below zone 540 (640).
   (2) Remove the front fairing (9) and the cover-plate (6) assembly as follows:
     (a) If necessary, use a SCRAPER - PLASTIC to remove the sealant between the front fairing (9) and the under-wing skin.
     (b) Hold the cover-plate (6) and remove the bolts (7) and the special washers (8).
     (c) Remove the cover-plate (6) and the front fairing (9) assembly from the under-wing skin.
   (3) Disconnect the electrical connector from the electrical receptacle (15).
   (4) Put a CAP - BLANKING on the electrical connector and the receptacle (15).
4. Procedure
Subtask 28-21-51-020-053-A ** ON A/C NOT FOR ALL
A. Removal of the Fuel Pumps 21QA(26QA) and 25QA(22QA)
CAUTION: DO NOT REMOVE :
  • THE RETAINER PIN-AND-SPRING ASSEMBLY FROM THE FUEL PUMP
  • THE RETAINER BAULK ARM FROM THE FUEL PUMP CANISTER
THE REMOVAL OF THESE PARTS CAN CAUSE LEAKAGE OF FUEL FROM THE FUEL TANK.
CAUTION: MAKE SURE THAT THE FUEL PUMP SLIDE-VALVE DOES NOT TURN WHEN YOU REMOVE THE FUEL PUMP. IF THE FUEL PUMP SLIDE-VALVE TURNS, IT CAN CAUSE LEAKAGE OF FUEL FROM THE FUEL TANK.
CAUTION: MAKE SURE THAT THE RETAINER BAULK ARM STAYS IN THE UNLOCKED (OPEN) POSITION. THIS WILL PREVENT ACCIDENTAL MOVEMENT OF THE SLIDE-VALVE WHICH CAN CAUSE LEAKAGE OF FUEL FROM THE FUEL TANK.
CAUTION: DO NOT EXTEND THE RETAINER PIN-AND-SPRING ASSEMBLY TO MORE THAN ITS LIMIT BECAUSE THIS WILL CAUSE DAMAGE TO IT. IF THE RETAINER PIN-AND -SPRING ASSEMBLY IS DAMAGED THE SLIDE-VALVE CAN MOVE AND CAUSE LEAKAGE OF FUEL FROM THE FUEL TANKS.
   (1) Remove the bolts (3).
   (2) Install the 558-1-05903-002 EXTRACTOR - FUEL PUMP or the 558-1-05903 EXTRACTOR - FUEL PUMP on the applicable fuel pump as follows:
CAUTION: YOU MUST USE THE TOOLING HOLES WHEN YOU INSTALL THE EXTRACTOR TOOL. THIS WILL PREVENT LEAKAGE OF FUEL FROM THE FUEL TANK.
     (a) Install the threaded rods (22) through the tooling holes (12) in the pump flange and fully into the threaded holes in the slide valve.
     (b) Turn the knobs (24) together in small equal increments until the threaded rods (22) touch the canister and resistance is felt.
   (3) Continue to turn the knobs (24) until the pump and slide valve start to move apart from the canister.
NOTE: The initial movement down will break the seal effect between the slide valve and the canister.
CAUTION: DO NOT USE TOO MUCH FORCE TO PULL THE FUEL PUMP AND THE SLIDE VALVE ON TO THE BAULK ARM. THIS WILL PREVENT DAMAGE TO THE BAULK ARM AND THE RETAINING PIN AND SPRING ASSEMBLY.
   (4) As soon as the slide valve starts to move, pull down lightly on the handles (23) of the 558-1-05903-002 EXTRACTOR - FUEL PUMP.
Continue to pull down lightly on the handles (23) of the 558-1-05903-002 EXTRACTOR - FUEL PUMP until:
  • The stop pin on the slide valve is fully clear of its locating hole in the flange of the canister
  • The movement of the fuel pump (2) and the slide valve is stopped by the baulk-arm (13) on the retaining pin and spring assembly.
NOTE: The fuel inlet through the canister is closed when the slide valve movement is completed.
   (5) Use the 558-1-05903-002 EXTRACTOR - FUEL PUMP to turn the fuel pump (2) and the slide valve counterclockwise. Turn until the head of the retaining pin is clear of the slot in the fuel pump (2).
   (6) Remove the 558-1-05903-002 EXTRACTOR - FUEL PUMP from the fuel pump (2) and the slide valve.
   (7) Put the CONTAINER 3 L(3/4 USGAL) in position below the drain bolt (8).
WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
   (8) Remove and discard the lockwire from the drain bolt (8).
   (9) Hold the fuel pump (2) and remove the drain bolt (8) with the O-ring (9).
   (10) Let the fuel drain from the fuel pump (2) and the fuel pump canister into the container.
   (11) Monitor the fuel that drains from the fuel pump drain hole. If the fuel flow from the fuel pump drain hole is too much to let work continue, do this procedure:
NOTE: This will make sure that the slide valve seal is correctly positioned.
     (a) Install the drain bolt (8) and the O-ring (9).
     (b) Use the 558-1-05903-002 EXTRACTOR - FUEL PUMP to turn the fuel pump (2) and the slide valve clockwise. Align the stop pin in the slide valve flange, with the stop pin locating hole in the canister.
     (c) Make sure that the slot in the flange of the fuel pump (2) engages with the retaining pin and spring assembly.
     (d) Push the fuel pump (2) and the slide valve up and fully into the fuel pump canister.
     (e) Repeat steps 2 thru 6.
     (f) Hold the fuel pump (2) and remove the drain bolt (8) with the O-ring (9).
     (g) Drain all fuel from the fuel pump (2) into the container.
   (12) Monitor the fuel that drains from the fuel pump drain hole again. If the fuel flow from the drain hole continues to be too much to let work continue, do this procedure:
     (a) Install the drain bolt (8) and the O-ring (9).
     (b) Defuel the applicable fuel tank (Ref. AMM TASK 28-25-00-650-001).
     (c) Hold the fuel pump (2) and remove the drain bolt (8) with the O-ring (9).
     (d) Drain all fuel from the fuel pump (2) into the container.
   (13) Discard the O-ring (9).
   (14) Write down the position of the electrical receptacle (14).
   (15) Install the hooks (21) of the 558-1-05903-002 EXTRACTOR - FUEL PUMP in the holes (4).
   (16) Turn the baulk-arm (13) on the retaining pin and spring assembly until it is clear of the fuel pump flange.
   (17) Pull down on the handles (23) to remove the fuel pump (2) from the slide valve.
NOTE: The fuel-pump slide-valve stop-pin will not let the slide-valve be pushed into the canister. The fuel-inlet (through the canister) will stay closed until the slide-valve is turned and pushed into the canister during the fuel pump installation procedure.
   (18) Remove the 558-1-05903-002 EXTRACTOR - FUEL PUMP from the fuel pump (2).
   (19) Remove and discard the O-rings (1), (11) and (10) from the fuel pump (2).
   (20) Examine the fuel pump (2) and the adjacent aircraft structure for signs of fuel leakage.
   (21) If fuel leakage is found, examine the applicable landing light assembly for fuel contamination (Ref. AMM TASK 33-42-11-000-001).
Subtask 28-21-51-020-053-B ** ON A/C NOT FOR ALL
A. Removal of the Fuel Pumps 21QA(26QA) and 25QA(22QA)
CAUTION: DO NOT REMOVE :
  • THE RETAINER PIN-AND-SPRING ASSEMBLY FROM THE FUEL PUMP
  • THE RETAINER BAULK ARM FROM THE FUEL PUMP CANISTER
THE REMOVAL OF THESE PARTS CAN CAUSE LEAKAGE OF FUEL FROM THE FUEL TANK.
CAUTION: MAKE SURE THAT THE FUEL PUMP SLIDE-VALVE DOES NOT TURN WHEN YOU REMOVE THE FUEL PUMP. IF THE FUEL PUMP SLIDE-VALVE TURNS, IT CAN CAUSE LEAKAGE OF FUEL FROM THE FUEL TANK.
CAUTION: MAKE SURE THAT THE RETAINER BAULK ARM STAYS IN THE UNLOCKED (OPEN) POSITION. THIS WILL PREVENT ACCIDENTAL MOVEMENT OF THE SLIDE-VALVE WHICH CAN CAUSE LEAKAGE OF FUEL FROM THE FUEL TANK.
CAUTION: DO NOT EXTEND THE RETAINER PIN-AND-SPRING ASSEMBLY TO MORE THAN ITS LIMIT BECAUSE THIS WILL CAUSE DAMAGE TO IT. IF THE RETAINER PIN-AND -SPRING ASSEMBLY IS DAMAGED THE SLIDE-VALVE CAN MOVE AND CAUSE LEAKAGE OF FUEL FROM THE FUEL TANKS.
   (1) Remove the bolts (3).
   (2) Install the 558-1-05903-002 EXTRACTOR - FUEL PUMP or the 558-1-05903 EXTRACTOR - FUEL PUMP on the applicable fuel pump as follows:
CAUTION: YOU MUST USE THE TOOLING HOLES WHEN YOU INSTALL THE EXTRACTOR TOOL. THIS WILL PREVENT LEAKAGE OF FUEL FROM THE FUEL TANK.
     (a) Install the threaded rods (22) through the tooling holes (12) in the pump flange and fully into the threaded holes in the slide valve.
     (b) Turn the knobs (24) together in small equal increments until the threaded rods (22) touch the canister and resistance is felt.
   (3) Continue to turn the knobs (24) until the pump and slide valve start to move apart from the canister.
NOTE: The initial movement down will break the seal effect between the slide valve and the canister.
CAUTION: DO NOT USE TOO MUCH FORCE TO PULL THE FUEL PUMP AND THE SLIDE VALVE ON TO THE BAULK ARM. THIS WILL PREVENT DAMAGE TO THE BAULK ARM AND THE RETAINING PIN AND SPRING ASSEMBLY.
   (4) As soon as the slide valve starts to move, pull down lightly on the handles (23) of the 558-1-05903-002 EXTRACTOR - FUEL PUMP.
Continue to pull down lightly on the handles (23) of the 558-1-05903-002 EXTRACTOR - FUEL PUMP until:
  • The stop pin on the slide valve is fully clear of its locating hole in the flange of the canister
  • The movement of the fuel pump (2) and the slide valve is stopped by the baulk-arm (13) on the retaining pin and spring assembly.
NOTE: The fuel inlet through the canister is closed when the slide valve movement is completed.
   (5) Use the 558-1-05903-002 EXTRACTOR - FUEL PUMP to turn the fuel pump (2) and the slide valve counterclockwise. Turn until the head of the retaining pin is clear of the slot in the fuel pump (2).
   (6) Remove the 558-1-05903-002 EXTRACTOR - FUEL PUMP from the fuel pump (2) and the slide valve.
   (7) Put the CONTAINER 3 L(3/4 USGAL) in position below the drain bolt (8).
WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
   (8) Remove and discard the lockwire from the drain bolt (8).
   (9) Hold the fuel pump (2) and remove the drain bolt (8) with the O-ring (9).
   (10) Let the fuel drain from the fuel pump (2) and the fuel pump canister into the container.
   (11) Monitor the fuel that drains from the fuel pump drain hole. If the fuel flow from the fuel pump drain hole is too much to let work continue, do this procedure:
NOTE: This will make sure that the slide valve seal is correctly positioned.
     (a) Install the drain bolt (8) and the O-ring (9).
     (b) Use the 558-1-05903-002 EXTRACTOR - FUEL PUMP to turn the fuel pump (2) and the slide valve clockwise. Align the stop pin in the slide valve flange, with the stop pin locating hole in the canister.
     (c) Make sure that the slot in the flange of the fuel pump (2) engages with the retaining pin and spring assembly.
     (d) Push the fuel pump (2) and the slide valve up and fully into the fuel pump canister.
     (e) Repeat steps 2 thru 6 and remove the fuel pump (2) and slide valve from the canister again.
     (f) Hold the fuel pump (2) and remove the drain bolt (8) with the O-ring (9).
     (g) Drain all fuel from the fuel pump (2) into the container.
   (12) Monitor the fuel that drains from the fuel pump drain hole again. If the fuel flow from the drain hole continues to be too much to let work continue, do this procedure:
     (a) Install the drain bolt (8) and the O-ring (9).
     (b) Defuel the applicable fuel tank (Ref. AMM TASK 28-25-00-650-001).
     (c) Hold the fuel pump (2) and remove the drain bolt (8) with the O-ring (9).
     (d) Drain all fuel from the fuel pump (2) into the container.
   (13) Discard the O-ring (9).
   (14) Write down the position of the electrical receptacle (14).
   (15) Install the hooks (21) of the 558-1-05903-002 EXTRACTOR - FUEL PUMP in the holes (4).
   (16) Turn the baulk-arm (13) on the retaining pin and spring assembly until it is clear of the fuel pump flange.
   (17) Pull down on the handles (23) to remove the fuel pump (2) from the slide valve.
NOTE: The fuel-pump slide-valve stop-pin will not let the slide-valve be pushed into the canister. The fuel-inlet (through the canister) will stay closed until the slide-valve is turned and pushed into the canister during the fuel pump installation procedure.
   (18) Remove the 558-1-05903-002 EXTRACTOR - FUEL PUMP from the fuel pump (2).
   (19) Remove and discard the O-rings (1), (11) and (10) from the fuel pump (2).
   (20) Examine the fuel pump (2) and the adjacent aircraft structure for signs of fuel leakage.
   (21) If fuel leakage is found, examine the applicable landing light assembly for fuel contamination (Ref. AMM TASK 33-42-11-000-001).
   (22) Do a detailed visual inspection of the fuel pumps for detached identification labels (Ref. AMM TASK 28-21-00-220-001).
Subtask 28-21-51-020-053-C ** ON A/C NOT FOR ALL
A. Removal of the Fuel Pumps 21QA(26QA) and 25QA(22QA)
CAUTION: DO NOT REMOVE :
  • THE RETAINER PIN-AND-SPRING ASSEMBLY FROM THE FUEL PUMP
  • THE RETAINER BAULK ARM FROM THE FUEL PUMP CANISTER
THE REMOVAL OF THESE PARTS CAN CAUSE LEAKAGE OF FUEL FROM THE FUEL TANK.
CAUTION: MAKE SURE THAT THE FUEL PUMP SLIDE-VALVE DOES NOT TURN WHEN YOU REMOVE THE FUEL PUMP. IF THE FUEL PUMP SLIDE-VALVE TURNS, IT CAN CAUSE LEAKAGE OF FUEL FROM THE FUEL TANK.
CAUTION: MAKE SURE THAT THE RETAINER BAULK ARM STAYS IN THE UNLOCKED (OPEN) POSITION. THIS WILL PREVENT ACCIDENTAL MOVEMENT OF THE SLIDE-VALVE WHICH CAN CAUSE LEAKAGE OF FUEL FROM THE FUEL TANK.
CAUTION: DO NOT EXTEND THE RETAINER PIN-AND-SPRING ASSEMBLY TO MORE THAN ITS LIMIT BECAUSE THIS WILL CAUSE DAMAGE TO IT. IF THE RETAINER PIN-AND -SPRING ASSEMBLY IS DAMAGED THE SLIDE-VALVE CAN MOVE AND CAUSE LEAKAGE OF FUEL FROM THE FUEL TANKS.
   (1) Remove the bolts (4).
   (2) Install the 558-1-05903-002 EXTRACTOR - FUEL PUMP or the 558-1-05903 EXTRACTOR - FUEL PUMP on the applicable fuel pump as follows:
CAUTION: YOU MUST USE THE TOOLING HOLES WHEN YOU INSTALL THE EXTRACTOR TOOL. THIS WILL PREVENT LEAKAGE OF FUEL FROM THE FUEL TANK.
     (a) Install the threaded rods (22) into:
  • The tooling holes (3) in the pump flange and fully into the threaded holes in the slide valve.
     (b) Turn the knobs (24) together in small equal increments until the threaded rods (22) touch the canister and resistance is felt.
   (3) Continue to turn the knobs (24) until the pump and slide valve start to move apart from the canister.
NOTE: The initial movement down will break the seal effect between the slide valve and the canister.
   (4) Immediately after the slide valve starts to move, pull down lightly on the handles (23) of the 558-1-05903-002 EXTRACTOR - FUEL PUMP.
CAUTION: DO NOT USE TOO MUCH FORCE TO PULL THE FUEL PUMP AND THE SLIDE VALVE ON TO THE BAULK ARM. THIS WILL PREVENT DAMAGE TO THE BAULK ARM AND THE RETAINING PIN AND SPRING ASSEMBLY.
   (5) Continue to pull down lightly on the handles (23) of the 558-1-05903-002 EXTRACTOR - FUEL PUMP until:
  • The stop pin on the slide valve is fully clear of its locating hole in the flange of the canister
  • The movement of the fuel pump (2) and the slide valve is stopped by the baulk-arm (14) on the retaining pin and spring assembly.
NOTE: The fuel inlet through the canister is closed when the slide valve movement is completed.
   (6) Use the 558-1-05903-002 EXTRACTOR - FUEL PUMP to turn the fuel pump (2) and the slide valve counterclockwise until:
  • The head of the retaining pin is clear of the slot in the fuel pump (2).
   (7) Remove the 558-1-05903-002 EXTRACTOR - FUEL PUMP from the fuel pump (2) and the slide valve.
   (8) Put the CONTAINER 3 L(3/4 USGAL) in position below the drain bolt (10).
WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
   (9) Remove and discard the lockwire from the drain bolt (10).
   (10) Hold the fuel pump (2) and remove the drain bolt (10) with the O-ring (11).
   (11) Drain the fuel from the fuel pump (2) and the fuel pump canister into the CONTAINER 3 L(3/4 USGAL).
   (12) Monitor the fuel that drains from the fuel pump drain hole.
   (13) If the fuel flow from the fuel pump drain hole is too much to let work continue, do this procedure:
NOTE: This will make sure that the slide valve seal is correctly positioned.
     (a) Install the drain bolt (10) and the O-ring (11).
     (b) Use the 558-1-05903-002 EXTRACTOR - FUEL PUMP to turn the fuel pump (2) and the slide valve clockwise:
  • Align the stop pin in the slide valve flange, with the stop pin locating hole in the canister.
     (c) Make sure that the slot in the flange of the fuel pump (2) engages with the retaining pin and spring assembly.
     (d) Push the fuel pump (2) and the slide valve up and fully into the fuel pump canister.
     (e) Do steps 2 thru 6 again and remove the fuel pump (2) and the slide valve from the canister again.
     (f) Hold the fuel pump (2) and remove the drain bolt (10) with the O-ring (11).
     (g) Drain all fuel from the fuel pump (2) into the CONTAINER 3 L(3/4 USGAL).
   (14) Monitor the fuel that drains from the fuel pump drain hole again.
   (15) If the fuel flow from the drain hole continues to be too much to let work continue, do this procedure:
     (a) Install the drain bolt (10) and the O-ring (11).
     (b) Defuel the applicable fuel tank (Ref. AMM TASK 28-25-00-650-001).
     (c) Hold the fuel pump (2) and remove the drain bolt (10) with the O-ring (11).
     (d) Drain all fuel from the fuel pump (2) into the CONTAINER 3 L(3/4 USGAL).
   (16) Discard the O-ring (11).
   (17) Record the position of the electrical receptacle (15).
   (18) Install the hooks (21) of the 558-1-05903-002 EXTRACTOR - FUEL PUMP in the holes (5).
   (19) Turn the baulk-arm (14) on the retaining pin and spring assembly until it is clear of the fuel pump flange.
   (20) Pull down on the handles (23) to remove the fuel pump (2) from the slide valve.
NOTE: The fuel-pump slide-valve stop-pin will not let the slide-valve be pushed into the canister. The fuel-inlet (through the canister) will stay closed until the slide-valve is turned and pushed into the canister during the fuel pump installation procedure.
   (21) Remove the 558-1-05903-002 EXTRACTOR - FUEL PUMP from the fuel pump (2).
   (22) Remove and discard the O-rings (1), (13) and (12) from the fuel pump (2).
   (23) Examine the fuel pump (2) and the adjacent aircraft structure for signs of fuel leakage.
   (24) If there is a fuel leakage, examine the applicable landing light assembly for fuel contamination (Ref. AMM TASK 33-42-11-000-001).
[Rev.10 from 2021] 2026.04.01 07:32:20 UTC
"Aviabrain" 2025