(2)
De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
Subtask 28-21-51-865-142
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1LB, 2LB, 3LB, 4LB.
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Subtask 28-21-51-942-051
C. Removal of Equipment
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Remove the safety barriers.
(3)
Remove the access platform(s).
(4)
Remove the warning notice(s).
(5)
Remove the ground support and maintenance equipment, the special and standard tools and all other items.
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TASK 28-21-51-000-002
Removal of the Fuel Pumps 37QA(38QA)
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.
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 container 2.0 l (0.5283 USgal)
558-1-05903 1 EXTRACTOR - FUEL PUMP
R 558-1-05903-002 1 EXTRACTOR TOOL
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-00-00-910-001 Fuel Safety Procedures
28-25-00-650-001 Pressure Defuel
28-21-51-991-002 Fig. 403
28-21-51-991-003 Fig. 404
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3. Job Set-up
__________ Subtask 28-21-51-941-058
A. Safety Precautions
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
(1) You must obey the fuel safety procedures (Ref. TASK 28-00-00-910-001) when you do work on the fuel system.
(2) Put the safety barriers in position. Subtask 28-21-51-865-098
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 37QA
121VU FUEL/CTR TK/PUMP1 SPLY 29QA P23 FOR 38QA
121VU FUEL/CTR TK/PUMP2 SPLY 30QA P26
Subtask 28-21-51-010-050
C. Get Access
(1) Open the applicable access door on the access panel:
-
FOR 37QA
open 195BB
-
FOR 38QA
open 196BB.
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4. Procedure
_________ (Ref. Fig. 403/TASK 28-21-51-991-002, 404/TASK 28-21-51-991-003) Subtask 28-21-51-020-054 R A. Removal of the Fuel Pump 37QA(38QA) 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 : 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.
CAUTION : DO NOT TURN THE FUEL PUMP SLIDE-VALVE WHEN YOU REMOVE THE FUEL
_______ PUMP. IF THE FUEL PUMP SLIDE-VALVE TURNS IT CAN CAUSE FUEL TO LEAK.
CAUTION : THE RETAINER BAULK-ARM (11) MUST BE IN THE OPEN POSITION. THIS
_______ WILL PREVENT ACCIDENTAL SLIDE-VALVE MOVEMENT THAT COULD CAUSE FUEL TO LEAK.
(1)
Remove the bolts (5).
(2)
Disconnect the electrical connector from the electrical receptacle (12).
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