(2)
 Put the access platform in position at the main landing-gear door.

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 4. Procedure_________
 (Ref. Fig. 401/TASK 28-22-51-991-001, 402/TASK 28-22-51-991-002, 403/TASK 28-22-51-991-003, 404/TASK 28-22-51-991-004)
 Subtask 28-22-51-020-052
 A. Removal of the APU Fuel Pump (4QC) 
R R  NOTE : This removal procedure is applicable for the APU fuel pump with____ P/N C12CB0010
 (1) Disconnect the electrical connector (2) from the APU fuel pump (1).
 (2) Put blanking caps on the disconnected electrical connectors.
 (3) Remove the four screws (3) from the APU fuel pump (1) which attach the pump to the canister (12). 
R R  (4) Remove the APU fuel pump (1) with the two screws (3) installed into the two extraction threads (4) as far as the security blockscrew (5) permits.
 NOTE : You must use two screws, thread size 10-32 UNF 3B for the____ removal of the pump.
 (5) Put a container in position below the APU fuel pump (1).
 (6) Remove the drain plug (7) and drain the remaining fuel from the APU fuel pump (1).
 (7) Remove and discard the O-ring (6) from the drain plug (7). 
R R  (8) Cut, remove and discard the lockwire and remove the screws (8) from the security plate (9).
 (9) Remove the security plate (9) from the APU fuel pump (1).
 (10) Turn the pump in a counterclockwise direction until the release slot is in line with the security blockscrew (5).
 (11) Remove the APU fuel pump (1).
 (12) Remove and discard the two O-rings (10) and (11) from the APU fuel pump (1).

R  APU Fuel Pump (P/N C12CB0010) 
R  (with Canister (P/N C49AA0221))
 Figure 401/TASK 28-22-51-991-001
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R  APU Fuel Pump (P/N C12CB0011/C12CB0012) 
R  (with Canister (P/N C49AA0221))
 Figure 402/TASK 28-22-51-991-002
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R  APU Fuel Pump (P/N C12CB0010)
 (with Canister (P/N C49AA0222))
 Figure 403/TASK 28-22-51-991-003
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R  APU Fuel Pump (P/N C12CB0011/C12CB0012/C12CB0013)
 (with Canister (P/N C49AA0222))
 Figure 404/TASK 28-22-51-991-004
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 Subtask 28-22-51-020-054
 B. Removal of the APU Fuel Pump (4QC) NOTE : This removal procedure is applicable for the APU fuel pump with
____ R P/N C12CB0011/C12CB0012/C12CB0013.
 (1)
 Disconnect the electrical connector (2) from the APU fuel pump (1).

 (2)
 Put blanking caps on the disconnected electrical connectors.

 (3)
 Remove the four screws (10) from the APU fuel pump (1) which attach the pump to the canister (6).

 (4)
 Remove the APU fuel pump (1) with two extraction screws, thread size 10-32 UNF 3B.

 (a) Install the extraction screws into the two extraction threads (9) as far as the security blockscrew (5) permits.

 (5)
 Put a container in position below the APU fuel pump (1).

 (6)
 Remove the drain plug (3) and drain the remaining fuel from the APU fuel pump (1).

 (7)
 Remove and discard the packing (4) from the drain plug (3).

 (8)
 Turn the pump in a counterclockwise direction until the release slot is in line with the security blockscrew (5).

 (9)
 Remove the APU fuel pump (1).

 (10) Remove and discard the two packings (7) and (8) from the APU fuel pump (1).
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 Installation of the APU Fuel Pump (4QC)
 WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
　
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