3. Job Set-up
__________ Subtask 49-73-51-860-051
A. Aircraft Maintenance Configuration
(1)
Energize the ground service network
(Ref. TASK 24-42-00-861-001).
(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 hydraulic systems are depressurized
(Ref. TASK 29-00-00-864-001).
Subtask 49-73-51-865-051
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 49-73-51-010-053
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)
Make sure that the light SW 11LJ is set to the ON position.
4. Procedure
_________ Subtask 49-73-51-420-050
A. Installation of the Encoder
NOTE : If replacement of the encoder is required, make sure that an
____ encoder which has been pre-programmed with the correct APU Serial Number is installed.
(1)
Install the encoder (2) with the screws (3) the washers (5) and the nuts (4) to the bracket (6).
(2)
Remove the blanking cap from the electrical connector (1).
(3)
Install the electrical connector (1) to the encoder (2). Subtask 49-73-51-865-052
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 49-73-51-710-050
C. Do the BITE test of the encoder (Ref. TASK 31-32-00-860-001).
5. Close-up
________ Subtask 49-73-51-410-050
A. 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, 316AR (Ref. TASK 52-41-00-410-001).
(3)
Remove the access platform(s).
Subtask 49-73-51-860-052
B. 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).
EXHAUST - DESCRIPTION AND OPERATION
___________________________________
R **ON A/C 001-003, 051-099, 401-499,
1.
General
_______ The APU exhaust system ducts the engine exhaust gas overboard. Its secondary function is to decrease the exhaust noise level. To keep aerodynamic losses during APU operation to a minimum, the duct has a sufficiently large diameter. Also, the exhaust system discharge is positioned at the very aft end of the aircraft, where a low pressure area is generated during flight. Thus it is also made sure that exhaust gas does not re-enter the APU air intake system.
2.
Component Location
__________________
(Ref. Fig. 001)
-------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF. ------------------------------------------------------------------------------- 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320飛機維護手冊 AMM 機載輔助動力 AIRBORNE AUXILIARY POWER 6(25)
