R **ON A/C 106-106, 108-149, 221-221, 224-224, 228-228,
49-61-34-991-002-A Fig. 401 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
**ON A/C 211-220, 222-223, 225-227, 229-299, 301-399,
49-61-34-991-002 Fig. 401A R **ON A/C 106-106, 108-149, 211-299, 301-399,
3. Job Set-up
__________
Subtask 49-61-34-860-050
A. Aircraft Maintenance Configuration.
(1)
Energize the aircraft electrical circuits (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 there is a warning notice in the cockpit to tell persons not to start the APU.
Subtask 49-61-34-865-059
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
R **ON A/C 106-106, 108-149, 221-221, 224-224, 228-228,
Subtask 49-61-34-010-057-A
C. Get Access
(1)
Make sure that the BULK cargo-compartment door 827 is open.
(2)
Make sure that the access platform is at the BULK cargo-compartment door 827.
(3)
Make sure that the access panel 162EW is removed (Ref. TASK 25-55-12-000-003).
**ON A/C 211-220, 222-223, 225-227, 229-299, 301-399,
Subtask 49-61-34-010-057
C. Get Access
(1)
Make sure that the AFT cargo-compartment door 826 is open.
(2)
Make sure that the access platform is below the AFT cargo-compartment door 826.
(3)
Make sure that the access panel 152HW is removed (Ref. TASK 25-55-11-000-003).
R **ON A/C 106-106, 108-149, 211-299, 301-399,
4. Procedure
_________ R **ON A/C 106-106, 108-149, 221-221, 224-224, 228-228,
(Ref. Fig. 401/TASK 49-61-34-991-002-A)
**ON A/C 211-220, 222-223, 225-227, 229-299, 301-399,
(Ref. Fig. 401A/TASK 49-61-34-991-002) R **ON A/C 106-106, 108-149, 211-299, 301-399,
Subtask 49-61-34-420-052
A. Install the ECB WARNING : SUPPORT THE UNIT/ASSEMBLY OR IT WILL FALL AND BECOME DAMAGED OR
_______ INJURE PERSONNEL. THE UNIT/ASSEMBLY IS HEAVY.
(1)
Remove the blanking cap from the electrical connection (4).
(2)
Put the ECB (3) in position on the tray (1).
(3)
Carefully push the ECB (3) to engage the electrical connection (4).
(4)
Make sure that the ECB (3) and the electrical connection (4) are fully engaged.
(5)
Move the fluted knobs (2) upwards to engage the feet (5) on the front face of the ECB (3).
(6)
Turn the fluted knobs (2) clockwise to tighten the ECB (3) in position on the rack (1). When the fluted knobs (2) are correctly tightened, the red marks on the threads are no longer seen.
Subtask 49-61-34-865-060
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.
Subtask 49-61-34-740-071-A
C. Do the ECB update with APU HOURS/CYCLES and the ECB Self-Test
(1)
On panel 25VU, set the APU MASTER SW pushbutton to ON.
(2)
Do the update of APU HOURS/CYCLES in ECB (Ref. TASK 49-00-00-860-011).
(3)
Set the CFDS to get the SYSTEM REPORT/TEST page for the APU. (Ref. TASK 31-32-00-860-001)
(4)
Do this test.
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the MCDU:
-
push the pushbutton adjacent to the SYSTEM SELF-TEST indication.
-
push the pushbutton adjacent to the RETURN display.
-
push the pushbutton adjacent to the RETURN display.
-
push the pushbutton adjacent to the RETURN display.
5. Close-up
________ On the MCDU:
-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.
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