(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 49-51-17-865-051
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 49-51-17-010-054
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 49-51-17-991-001) Subtask 49-51-17-420-050
A. Installation of the Total Pressure Sensor (8044KM)
(1)
Remove the blanking plug from the tube (4).
(2)
Install the new packing (6) on the tube (4).
(3)
Put the total pressure sensor (8044KM) (2) into position and connect the pipe (4) to the total pressure sensor (8044KM) (2) with the bolt (3).
(4)
Install the total pressure sensor (8044KM) (2) to the bracket with the bolts (5).
(5)
Safety the bolt (3) with lockwire-corrosion resistant steel 0.8 mm
(0.032 in) dia.
(6)
Remove the blanking cap and connect the electrical connector (1) to the total pressure sensor (8044KM) (2).
Subtask 49-51-17-865-052
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.
Subtask 49-51-17-710-050
C. Test
(1)
Energize the CFDS to get the SYSTEM REPORT/TEST page for the APU (Ref. TASK 31-32-00-860-001).
(2)
Set the APU MASTER SW 14KD to ON.
(3)
Do this Test.
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the MCDU:
-
push the pushbutton adjacent to the APU indication.
-
push the pushbutton adjacent to the SYSTEM SELF-TEST indication.
2. On the MCDU:
-
push the pushbutton adjacent to the RETURN display.
-
push the pushbutton adjacent to the RETURN display.
-
push the pushbutton adjacent to the RETURN display.
On the MCDU:
-
the APU menu page comes on.
-
the APU SYSTEM SELF-TEST page comeson and shows the messageIN PROGRESS.
-if the test is satisfactory, the message TEST OK comes on.
On the MCDU:
-
the APU menu page comes on.
-
the SYSTEM REPORT/TEST page comes on.
-
the CFDS page comes on.
(4)
Start and operate the APU. (Ref. TASK 49-00-00-860-003)
(5)
Examine the total pressure sensor (2) for air leaks.
NOTE : No leaks are permitted.
____
(6)
Stop the APU. (Ref. TASK 49-00-00-860-004)
5. Close-up
________ Subtask 49-51-17-410-050
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 49-51-17-860-052
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
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