B. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
28-00-00-910-001 Fuel Safety Procedures
52-41-00-010-001 Open the APU Doors for Access
R **ON A/C 001-049, 101-105, 151-199, 201-210,
28-22-14-991-001-A Fig. 401 R **ON A/C 051-099,
R 28-22-14-991-001 Fig. 401A
1EFF : ALL 1 28-22-14Page 401 1 1 May 01/05 1 1 1CES 1
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
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R **ON A/C 106-149, 211-299, 301-399, 401-499,
28-22-14-991-001-B Fig. 401B
**ON A/C ALL
3. Job Set-up
__________
Subtask 28-22-14-865-050
A. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU APU/FUEL/BLOW OFF/PUMP 2QC B14 121VU APU/FUEL/BLOW OFF/CTL 1QC K39 121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41 121VU APU/FUEL/PUMP/CTL 3QC M38
Subtask 28-22-14-941-050
B. Safety Precautions
(1)
When you do maintenance work on the fuel system you must obey the fuel safety procedures (Ref. TASK 28-00-00-910-001).
(2)
On the FUEL overhead panel 40VU, make sure that the L TK PUMPS and the R TK PUMPS pushbutton switches are released (the OFF legends are on).
(3)
On the APU section of the overhead panel 25VU, make sure that the APU MASTER SW is in the off/released position (the ON legend is off).
(4)
Put a WARNING NOTICE in position: - on the overhead panel 25VU, to tell persons not to push the APU MASTER SW,
- on the FUEL overhead panel 40VU, to tell persons not to operate the fuel system,
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- on the FIRE panel 20VU, to tell persons not to operate the APU fire extinguishing system.
Subtask 28-22-14-010-050
C. Get Access
(1)
Put the access platform in position below the APU compartment.
(2)
Open the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-010-001).
(3)
Put a container 1.0 l below the APU fuel LP switch (1) to collect unwanted fuel.
(4)
Remove the blanking plug (7) from the APU vent and drain valve (8).
(5)
Install the ADAPTER - VENT AND DRAIN VALVE, APU (9) to the fuel vent and drain valve (8).
(6)
Drain the unwanted fuel into the container.
(7)
Remove the ADAPTER - VENT AND DRAIN VALVE, APU (9) when the fuel is drained.
4. Procedure
_________
**ON A/C 001-049, 101-105, 151-199, 201-210,
(Ref. Fig. 401/TASK 28-22-14-991-001-A)
**ON A/C 051-099,
(Ref. Fig. 401A/TASK 28-22-14-991-001) R **ON A/C 106-149, 211-299, 301-399, 401-499,
(Ref. Fig. 401B/TASK 28-22-14-991-001-B)
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APU Fuel LP-Switch 5030QM Figure 401/TASK 28-22-14-991-001-A
R 1EFF : 001-049, 101-105, 151-199, 201-210, 1 28-22-14Page 404 1 1 May 01/05 1 1 1CES 1
R APU Fuel LP-Switch 5030QM
R Figure 401A/TASK 28-22-14-991-001
R 1EFF : 051-099, 1 28-22-14 Page 405
1 1 May 01/05
1 1
1CES 1
APU Fuel LP-Switch 5030QM Figure 401B/TASK 28-22-14-991-001-B
R 1EFF : 106-149, 211-299, 301-399, 401-499, 1 28-22-14Page 406 1 1 Aug 01/05 1 1 1CES 1 **ON A/C ALL
Subtask 28-22-14-020-050
A. Removal of the APU Fuel LP-Switch 5030QM
(1)
Disconnect the electrical connector (2) from the APU fuel LP switch (1).
(2)
Put blanking caps on the disconnected electrical connectors.
(3)
Remove and discard the lockwire from the union (3) to the nut (4).
(4)
Loosen the nut (4) and disconnect from the APU vent and drain valve (8).
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