(3) Close the main landing-gear doors (Ref. TASK 32-12-00-410-001). Subtask 28-29-00-860-055
B. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002)
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TASK 28-29-00-440-002
APU LP VALVE (14QM) - Reactivation
1. Reason for the Job
__________________
Refer to the MMEL TASK: 28-29-01
Fuel
APU LP Fuel Shut off
APU LP Valve
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
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R No specific 1 STEPLADDER 2.0 M (6.6 FT)
B. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
from the External Power 28-29-51-400-001 Installation of the APU Fuel LP Valve Actuator (3QF) 32-12-00-010-001 Open the Main Gear Doors for Access 32-12-00-410-001 Close the Main Gear Doors after Access
R TSM 28 (for corrective action) 28-29-00-991-001 Fig. 401 28-29-00-991-002 Fig. 402
3. Job Set-up
__________
Subtask 28-29-00-860-056
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002)
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B. Get Access
(1) Open the main landing-gear doors Z734, Z744 (Ref. TASK 32-12-00-010-001).
R (2) Put the STEPLADDER 2.0 M (6.6 FT) in position at the main landing-gear bay.
4. Procedure
_________
Subtask 28-29-00-440-050
A. Reactivation of the APU LP Shutoff Valve (Actuator P/N B27000) (Ref. Fig. 401/TASK 28-29-00-991-001)
(1)
If the LP-valve actuator was removed to deactivate the LP shutoff valve do the following steps:
(a)
Remove the electrical connectors (2) from the locking device (8).
(b)
Remove the nuts (3), the washers (4) and the bonding strap (5) from the actuator mount studs (9).
(c)
Remove the locking device (8).
(d)
Install the APU-fuel LP-valve actuator (1) (Ref. TASK 28-29-51-400-001).
(2)
If the LP shutoff valve was deactivated without a removal of the actuator do following steps:
(a)
Remove the tie-wraps from the tied back cables/connectors (2).
(b)
Make sure that the electrical connectors are clean and in the correct condition.
(c)
Connect the connectors (2) to the actuator.
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B. Reactivation of the APU LP Shutoff Valve (Actuator P/N A08000) (Ref. Fig. 402/TASK 28-29-00-991-002)
(1)
If the LP-valve actuator was removed to deactivate the LP shutoff valve do the following steps:
(a)
Remove the tie-wraps (8) from the tied back cables/connectors (4).
(b)
Make sure that the electrical connectors are clean and in the correct condition.
(c)
Remove the screw (3) and the bonding strap (2) from the locking cover (5).
(d)
Remove the V-Band clamp (6) and the locking cover (5).
(e)
Install the APU-fuel LP-valve actuator (1) (Ref. TASK 28-29-51-400-001).
(2)
If the LP shutoff valve was deactivated without a removal of the actuator do following steps:
(a)
Remove the tie-wraps (8) from the tied back cables/connectors (4).
(b)
Make sure that the electrical connectors are clean and in the correct condition.
(c) Connect the connectors (4) to the actuator.
Subtask 28-29-00-865-059
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1QF, 2QF
Subtask 28-29-00-810-050
R D. Trouble Shooting
(1) Do the trouble shooting procedure of the APU LP-fuel shutoff-valve R (Ref. TSM 28).
(2) Remove the warning notice(s).
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