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 -COMPONENTS THAT MOVE.
 WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______ GEAR.
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking caps No specific circuit breaker(s) safety clip(s) No specific safety barriers No specific warning notice No specific access platform 2.8 m (9 ft. 2 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-10-00-910-001 Safety Procedures When You Do Work in a Fuel Tank 28-10-00-910-002 Access to the Fuel Tanks and the Work Areas 28-25-00-650-001 Pressure Defuel 28-25-00-650-003 To Drain Remaining Fuel from the Wing Tanks and the
 Center Tank 32-12-00-010-001 Open the Main Gear Doors for Access 57-17-11-000-001 Removal of the Covers 147AZ (148AZ) 28-21-53-991-002 Fig. 402
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 3. Job Set-up
__________ (Ref. Fig. 402/TASK 28-21-53-991-002) Subtask 28-21-53-941-056
 A. Safety Precautions WARNING : OBEY THE SAFETY PROCEDURES WHEN YOU DO WORK IN A FUEL TANK.
_______
 (1)
 You must obey the fuel safety procedures (Ref. TASK 28-10-00-910-001) when you do work in a fuel tank.

 (2)
 Put the safety barriers in position.

 (3)
 Put a warning notice on the applicable panel 195BB(196BB) to tell persons not to operate the MLG doors.

 Subtask 28-21-53-650-058
 B. Aircraft Maintenance Configuration
 (1)
 Defuel the center fuel tank (Ref. TASK 28-25-00-650-001).

 (2)
 Drain the remaining fuel from the center fuel tank (Ref. TASK 28-25-00-650-003).

 Subtask 28-21-53-865-063
 C. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU FUEL/CTR TK/PUMP2 SPLY 30QA P26 121VU FUEL/CTR TK/PUMP1 SPLY 29QA P23
 Subtask 28-21-53-010-052
 D. Get Access WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR DOORS ARE
_______
 CLEAR.

 (1) Open the applicable MLG door 734(744) (Ref. TASK 32-12-00-010-001).
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 Jet Pump - Center Tank
 Figure 402/TASK 28-21-53-991-002

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 (2)
 Make sure that the GROUND LOCK SLEEVE is installed on the applicable MLG door actuating-cylinder.

 (3)
 Put the access platform below the applicable access panel 147AZ(148AZ).

 (4)
 Remove the applicable access panel (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-17-11-000-001):

 -FOR 89QM
 remove 147AZ
 FOR 90QM
 remove 148AZ.

 4. Procedure
_________
 (Ref. Fig. 402/TASK 28-21-53-991-002) Subtask 28-21-53-020-052
 A. Removal of the Jet Pump 89QM(90QM)
 CAUTION : YOU MUST USE TWO WRENCHES AND HOLD THE COMPONENT WHEN YOU

_______ REMOVE/INSTALL THE PIPE COUPLINGS AND/OR UNIONS. THIS PREVENTS DAMAGE TO THE COMPONENT.
 (1)
 Remove the nut (46), the bolt (39) and the washer (40) and disconnect the bonding lead (41) from the jet pump (42).

 (2)
 Disconnect the coupling nuts (31), (45), (49) and (51).

 (3)
 Loosen the nut (33) and remove the tee piece (32).

 (4)
 Remove and discard the O-ring (34).

 (5)
 Loosen the nut (48) and remove the elbow (50).

 (6)
 Remove and discard the O-ring (47).

 (7)
 Remove the union (44) and remove and discard the O-ring (43).

 (8)
 Put blanking caps on the disconnected coupling nuts (31), (45), (49) and (51), the elbow (50), the tee piece (32) and the union (44).

 (9)
 Remove and discard the lockwire from the end plug (38).

 (10) Remove the nuts (36) and the jet pump (42).
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