R **ON A/C 001-049, 051-099, 101-105, 151-154, 201-207,
28-22-52-991-001 Fig. 401
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REFERENCE DESIGNATION
-------------------------------------------------------------------------------
R **ON A/C 106-149, 155-199, 208-299, 301-399, 401-499,
28-22-52-991-001-A Fig. 401A
**ON A/C ALL
3. Job Set-up
__________
Subtask 28-22-52-861-050
A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002). Subtask 28-22-52-869-050
B. On the overhead control and indicating panel 25VU, make sure that the APU/MASTER SW pushbutton switch is released (out). (On this pushbutton switch, the ON legend is off).
Subtask 28-22-52-650-050
C. Fuel Configuration
(1)
Make sure that the crossfeed valve is in the closed position.
(2)
Defuel the center tank and the left wing tank (Ref. TASK 28-25-00-650-001).
(3)
Drain the remaining fuel from the center tank and the left wing tank (Ref. TASK 28-25-00-650-003).
Subtask 28-22-52-862-050
D. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
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E. Removal for Access
(1)
Put the access platform in position under the main door of the left main gear.
(2)
Open the main door of the left main gear (Ref. TASK 32-12-00-010-001).
(3)
Remove the manhole cover 147AZ (Ref. TASK 57-17-11-000-001).
(4) Remove the APU fuel pump 4QC (Ref. TASK 28-22-51-000-001).
Subtask 28-22-52-910-050
F. You must obey the special fuel safety procedures when you work in the fuel tank (Ref. TASK 28-10-00-910-001) (Ref. TASK 28-10-00-910-002).
4. Procedure
_________
**ON A/C 001-049, 051-099, 101-105, 151-154, 201-207,
(Ref. Fig. 401/TASK 28-22-52-991-001) R **ON A/C 106-149, 155-199, 208-299, 301-399, 401-499,
(Ref. Fig. 401A/TASK 28-22-52-991-001-A)
**ON A/C 001-049, 051-099, 101-105, 151-154, 201-207,
Subtask 28-22-52-020-050
A. Removal of the APU Fuel Pump Canister
(1)
Put a container below the pump canister (22).
(2)
Remove the nut (16), the bolt (13), the washer (14) and disconnect the bonding strip (15).
(3)
Loosen the nuts (8) and remove the line (17).
(4)
Remove the screws (11) and the washers (10).
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APU Fuel Pump Canister
Figure 401/TASK 28-22-52-991-001
R 1EFF : 001-049, 051-099, 101-105, 151-154, 1 28-22-52Page 404 1201-207, 1May 01/05 1 1 1CES 1
APU Fuel Pump Canister
Figure 401A/TASK 28-22-52-991-001-A
R 1EFF : 106-149, 155-199, 208-299, 301-399, 1 28-22-52Page 405 1401-499, 1Aug 01/05 1 1 1CES 1
(5)
Remove the screws (18) and the washers (19).
(6)
Remove the nut (2), the bolt (4) and disconnect the bonding strip (3).
(7)
Cut and remove the lockwire from the screws (5).
(8)
Hold the pump canister (22) and remove the five screws (5), the washers (6) and the gutter (7).
(9)
Remove the pump canister (22), and remove and discard the O-rings (9), (21) and (23).
(10) Put blanking plugs on the disconnected line ends. R **ON A/C 106-149, 155-199, 208-299, 301-399, 401-499,
Subtask 28-22-52-020-050-A
A. Removal of the APU Fuel Pump Canister
(1)
Put a container below the pump canister (22).
(2)
Remove the nut (16), the bolt (13), the washer (14) and disconnect the bonding strip (15).
(3)
Loosen the nuts (8) and remove the line (17).
(4)
Remove the screws (11) and the washers (10).
(5)
Remove the screws (18) and the washers (19).
(6)
Remove the nut (2), the bolt (4) and disconnect the bonding strip (3).
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