(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 the access platform is in position below the APU compartment.
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(5) Make sure that the APU access doors are open (Ref. TASK 52-41-00-010-001).
(6)
Make sure that the LIGHT control SW 11LJ is set to the ON position. Subtask 49-73-32-865-051
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
4. Procedure
_________ (Ref. Fig. 401/TASK 49-73-32-991-001) Subtask 49-73-32-420-050
A. Installation of the Data Memory Module
CAUTION : MAKE SURE THAT THE DATA ARE ERASED FROM THE MEMORY OF THE
_______ REPLACEMENT DATA MEMORY MODULE. IF THE DATA STAY IN THE REPLACEMENT MODULE, THEY WILL ERASE THE LIFE DATA IN THE ECB FOR THE APU ON THE AIRCRAFT. THE ECB WILL THEN CALCULATE THE LIFE DATA OF A DIFFERENT APU.
NOTE : Removal of the module to service another APU is not allowed.
____ Replace with a new module or remove and install the same module.
(1)
Put the module (4) in position on the APU and install the module (4) with the bolts (2) and the washers (3).
(2)
Remove the blanking caps from the electrical connectors (1).
(3)
Connect the electrical connector (1) to the module (4).
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B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
Subtask 49-73-32-710-050
C. Do the APU SYSTEM SELF-TEST to make sure that the DMM is serviceable.
(1)
Set the CFDS to get the SYSTEM REPORT/TEST page for the APU. (Ref. TASK 31-32-00-860-001)
(2)
Do this test.
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the MCDU: On the MCDU:
- push the pushbutton adjacent to the SYSTEM SELF-TEST indication. - the APU SYSTEM SELF-TEST page showsand the messageIN PROGRESS
comes on.
- if the test is satisfactory, the message TEST OK
comes on.
This indicates that all LRU's are
serviceable.
- if the test is not satisfactory, the name and the ATA reference number of
the unserviceable LRU shows.
- push the pushbutton adjacent to the RETURN display. - the APU menu page comes on.
- push the pushbutton adjacent to the RETURN display. - the SYSTEM REPORT/TEST page comes on.
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-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
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