(2)
Put the safety barriers in position.
(3)
Put a warning notice in position to tell persons not to operate the slats.
(4)
Put a warning notice in the cockpit to tell persons not to operate the APU or bleed air.
Subtask 28-40-00-010-058
B. Get Access
(1)
Put the access platform in position in zone 522(522).
(2)
Remove the applicable access panel(s) (Ref. TASK 57-41-37-000-003):
-
for the LH LP valve 12QM, remove panel 522AT
-
for the RH LP valve 13QM, remove panel 622AT.
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Subtask 28-40-00-860-063
C. Aircraft Maintenance Configuration
(1)
Make sure that the APU does not operate and there is no bleed air.
(2)
Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
(3)
Fully extend the slats (Ref. TASK 27-80-00-866-004).
(4)
Make sure that the LOCKING TOOL - FLAP/SLAT CONTROL LEVER is on the flap/slat control lever.
Subtask 28-40-00-865-057
D. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU FUEL/LP VALVE/MOT1/ENG2 2QG A09 49VU FUEL/LP VALVE/MOT1/ENG1 1QG A08 121VU FUEL/LP VALVE/MOT2/ENG2 4QG M26 121VU FUEL/LP VALVE/MOT2/ENG1 3QG M25
4. Procedure
_________
(Ref. Fig. 402/TASK 28-40-00-991-003, 403/TASK 28-40-00-991-004)
Subtask 28-40-00-040-079
A. Test of the valve 12QM
(1) In the test that follows, on each operation of the LP valve:
-
make sure that the see/feel indicator operates smoothly, from the valve open (valve closed) position to the valve closed (valve open) position
-
make sure that the see/feel indicator marks are accurately aligned in the valve open position
-
make sure that the see/feel indicator marks are at 90 degrees to each other in the valve closed position.
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LP Valve - Cockpit Component Location Figure 402/TASK 28-40-00-991-003
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LP Valve - Component Location and Detail Figure 403/TASK 28-40-00-991-004
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(2) For the valve 12QM, do this test:
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the panel 115VU:
-make sure that the ENG/MASTER 1 switch is in the OFF position.
2. On the LP valve actuator 9QG:
-look at the position of the mechanical see/feel indicator.
3. On the panel 121VU:
-Open, safety and tag this(these) circuit breaker(s):
-3QG.
4. On the panel 115VU:
-put the ENG/MASTER 1 switch to the ON position.
5. On the LP valve actuator 9QG:
-look at the position of the mechanical see/feel indicator.
6. On the panel 115VU:
-put the ENG/MASTER 1 switch to the OFF position.
7. On the LP valve actuator 9QG:
-look at the position of the mechanical see/feel indicator.
8. On the panel 121VU:
-Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
-3QG.
9. On the panel 49VU: Open, safety and tag this(these) circuit breaker(s):
-1QG.
The indicator shows that the LP valveis closed.
The ENG 1 LP valve MOTOR 2 SUPPLY andCONTROL are isolated.
In zone 510, the LP valve moves to theopen position.
The indicator shows that the LP valveis open.
In zone 510 the LP valve moves to theclosed position.
The indicator shows that the LP valveis closed.
The ENG 1 LP valve MOTOR 2 SUPPLY andCONTROL are energized.
The ENG 1 LP valve MOTOR 1 SUPPLY andCONTROL are isolated.
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