52-41-00-410-001 Close the APU Doors after Access 49-91-21-991-002 Fig. 401
3. Job Set-up
__________
Subtask 49-91-21-860-050
A. Aircraft Maintenance Configuration.
(1)
Make sure that the aircraft electrical circuits are energized (Ref. TASK 24-41-00-861-002).
(2)
On the panel 25VU, make sure that the APU MASTER SW pushbutton switch is off.
(3)
Make sure that there is a warning notice in the cockpit to tell persons not to start the APU.
(4)
Make sure that the hydraulic systems are depressurized (Ref. TASK 29-00-00-864-001).
(5)
Make sure that the access platform is in position below the APU compartment.
(6)
Make sure that the APU access doors are open (Ref. TASK 52-41-00-010-001).
(7)
Make sure that the LIGHT control switch 11LJ is set to the on position.
Subtask 49-91-21-865-056
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
4. Procedure
_________
(Ref. Fig. 401/TASK 49-91-21-991-002) Subtask 49-91-21-420-051
A. Installation of the Differential Pressure Switch and Indicator
(1)
Apply COMMON GREASE (Material No. 04-012) to the new packing (2) and (3).
(2)
Install the new packing (2) and (3) on the differential pressure switch and indicator (5).
(3)
Install the differential pressure switch and indicator (5) with the screws (4) on the gearbox.
(4)
TORQUE the screws (4) to between 17 and 19 lbf.in (0.19 and 0.21 m.daN).
(5)
Remove the blanking caps from the electrical connectors.
(6)
Connect the electrical connector P5 (1) to the differential pressure switch and indicator (5).
Subtask 49-91-21-865-057
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD
Subtask 49-91-21-710-052
C. Test
(1) Do the operational test of the APU (Ref. TASK 49-00-00-710-008).
(a) Operate the APU for min. five minutes and examine the joints of the differential pressure switch and indicator for leaks.
NOTE : Leaks are not permitted.
____ 5. Close-up
________ Subtask 49-91-21-410-052
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Set the LIGHT control switch 11LJ to the off position.
(3)
Close the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-410-001).
(4)
Remove the access platform(s). Subtask 49-91-21-860-052
B.
Aircraft Maintenance Configuration.
(1)
Pressurize the reservoirs of the hydraulic systems.
(Ref. TASK 29-14-00-614-002).
(2)
De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
(3)
Remove the warning notice(s).
INDICATOR - DIFFERENTIAL PRESSURE, OIL PUMP - REMOVAL/INSTALLATION
__________________________________________________________________
R **ON A/C 001-003, 051-099, 401-499,
TASK 49-91-22-000-001 Removal of the Oil-Pump Differential-Pressure Indicator (GTCP 36-300) WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______
WHEN YOU DO THE MAINTENANCE TASK(S).
WARNING : DO NOT LET OIL STAY ON YOUR SKIN FOR A LONG TIME AS IT CAN CAUSE
_______
INJURY.
WARNING : CUT, REMOVE AND DISCARD THE LOCKWIRE AS YOU DO THE TASK. LOOSE
_______
LOCKWIRE CAN CUT OR BLIND YOU.
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
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