(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 49-51-16-865-051
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 49-51-16-010-054
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
_________ (Ref. Fig. 401/TASK 49-51-16-991-001) Subtask 49-51-16-420-051
A. Installation of the Differential Pressure Transducer (8043KM)
(1)
Remove the blanking plugs from the air tubes (9) and (12).
(2)
Install the new packing (8) on the tube (9).
(3)
Put the differential pressure transducer in position, and install the tube (9) with the bolt (10).
(4)
Install the new packing (11) on the tube (12).
(5)
Connect the tube (12) to the differential pressure transducer (8043KM) (6) with the bolt (1) and the washer (2), and the tube retainer (3).
(6)
Install the differential pressure transducer (8043KM) (6) with the bolts (4) and the cable bracket (5).
(7)
Remove the blanking caps from the electrical connectors.
(8)
Make sure that the electrical connectors are clean and in the correct condition.
(9)
Connect the electrical connector (7) to the differential pressure transducer (8043KM) (6).
(10) Safety the bolts (1) and (10) with lockwire-corrosion resistant steel
0.8 mm (0.032 in) dia. Subtask 49-51-16-865-052
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 49-51-16-710-052
C. Do the ECB Self-Test (Ref. TASK 49-00-00-710-001).
(1)
Start and operate the APU (Ref. TASK 49-00-00-860-003).
(2)
Examine the differential pressure transducer (2) for air leaks. NOTE : No leaks are permitted.
____
(3)
Stop the APU. (Ref. TASK 49-00-00-860-004)
5. Close-up
________ Subtask 49-51-16-410-050
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Set the LIGHT control SW 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 49-51-16-860-052
B.
Aircraft Maintenance Configuration
(1)
Pressurize the reservoirs of the hydraulic systems. (Ref. TASK 29-14-00-614-002).
(2)
De-energize the ground service network
(Ref. TASK 24-42-00-862-001).
(3)
Remove the warning notice(s).
TRANSDUCER - DIFFERENTIAL PRESSURE - REMOVAL/INSTALLATION
_________________________________________________________ TASK 49-51-16-000-002 Removal of the Transducer - Differential Pressure (8043KM) (131-9(A)) WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______ WHEN YOU DO THE MAINTENANCE TASK(S).
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking caps
No specific blanking plug
No specific circuit breaker(s) safety clip(s)
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