(2)
On the panel 25VU make sure that the APU MASTER SW p/bsw 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 hydraulic systems are depressurized
(Ref. TASK 29-00-00-864-001).
Subtask 49-91-21-865-051
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
Subtask 49-91-21-010-053
C. Get Access
(1)
Put the access platform in position below the APU access doors 315AL and 316AR.
(2)
Open the APU access doors 315AL and 316AR (Ref. TASK 52-41-00-010-001).
(3)
Set the LIGHT SW 11LJ to the ON position.
4. Procedure
_________ (Ref. Fig. 401/TASK 49-91-21-991-001) Subtask 49-91-21-420-052
A. Installation of the Differential Pressure Indicator (8073KM)
(1)
Apply a thin layer of OILS (Material No. 03-002) on the new O-ring (2).
(2)
Apply a thin layer of OILS (Material No. 03-002) on the new O-ring (3).
(3)
Install the new O-rings (2) and (3) on the differential pressure indicator (8073KM) (1).
(4)
Install the differential pressure indicator (8073KM) (1) to the oil-filter upper housing-assembly (4).
(5)
TORQUE the differential pressure indicator (8073KM) (1) to between
2.04 and 2.16 m.daN (15.04 and 15.92 lbf.ft) and safety the differential pressure indicator with MISCELLANEOUS (Material No. 19-010).
Subtask 49-91-21-410-051
B. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the APU access doors 315AL and 316AR (Ref. TASK 52-41-00-410-001).
Subtask 49-91-21-865-052
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.
Subtask 49-91-21-710-053
D. Start and operate the APU.
(1)
Start the APU (Ref. TASK 49-00-00-860-003).
(2)
Allows the APU to run 5 minutes.
(3)
Shutdown the APU (Ref. TASK 49-00-00-860-004).
(4)
Open the APU access doors 315AL and 316AR (Ref. TASK 52-41-00-010-001).
(5)
Do a leak check.
NOTE : No leakage is permitted.
____
(6)
Do a visual check of the oil quantity in the APU. Add oil if the oil level is on or less than the ADD mark on the sight glass (Ref. TASK 49-90-00-600-001).
5. Close-up
________ Subtask 49-91-21-410-050
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Set the LIGHT SW 11LJ to the OFF position.
(3)
Close the APU access door 315AL, 316AR (Ref. TASK 52-41-00-410-001).
(4)
Remove the access platform(s). Subtask 49-91-21-865-053
B.
Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
Subtask 49-91-21-860-055
C. Aircraft Maintenance Configuration
(1)
De-energize the ground service network
(Ref. TASK 24-42-00-862-001).
(2)
Pressurize the reservoirs of the hydraulic systems.
(Ref. TASK 29-14-00-614-002).
(3)
Remove the warning notice(s).
SWITCH AND INDICATOR - DIFFERENTIAL PRESSURE, GENERATOR SCAVENGE PUMP FILTER
____________________________________________________________________________
REMOVAL/INSTALLATION
____________________ TASK 49-91-21-000-002 Removal of the Differential Pressure Switch and Indicator (APS 3200) WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______ WHEN YOU DO THE MAINTENANCE TASK(S).
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