128.
(2)
Open the access door 824.
4. Procedure
_________
(Ref. Fig. 401/TASK 46-21-34-991-001) Subtask 46-21-34-020-050
A. Removal of the ATSU
(1)
Loosen the nuts (4).
(2)
Lower the nuts (4).
(3)
Pull the ATSU (1) on its rack (3) to disconnect the electrical connectors (2).
(4)
Remove the ATSU (1) from its rack (3).
(5)
Put blanking caps on the disconnected electrical connectors (2).
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Air Traffic Services Unit (ATSU)
Figure 401/TASK 46-21-34-991-001
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TASK 46-21-34-400-001
Installation of the Air Traffic Service Unit (ATSU) (1TX1)
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform 1.6 m (5 ft. 3 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
46-21-00-610-001 Uploading of the ATSU Software with the Multipurpose
Disk Drive Unit (MDDU) 46-21-00-710-002 VHF 3 Link Test of the ATSU 46-21-00-740-001 BITE Test of the ATIMS 46-21-00-860-001 Initialization Procedure of the ATSU Router 46-21-34-991-001 Fig. 401 46-21-34-991-002 Fig. 402
3. Job Set-up
__________ Subtask 46-21-34-860-050
A. Aircraft Maintenance Configuration
(1)
Make sure that the access platform is in position at the access door 824 in zone 128.
(2)
Make sure that the access door 824 is open.
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Subtask 46-21-34-865-051
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU ATSU 1 3TX1 L16 121VU ATSU 1/SWTG 5TX1 L15
4. Procedure
_________
(Ref. Fig. 401/TASK 46-21-34-991-001) Subtask 46-21-34-420-050
A. Installation of the ATSU
(1)
Clean the component interface and/or the adjacent area.
(2)
Do an inspection of the component interface and/or the adjacent area.
(3)
Remove the blanking caps from the electrical connectors (2).
(4)
Make sure that the electrical connectors are clean and in the correct condition.
(5)
Install the ATSU (1) on its rack (3).
(6)
Push the ATSU (1) on its rack (3) to connect the electrical connectors (2).
(7) Engage the nuts (4) on the lugs (5) and tighten. Subtask 46-21-34-865-052
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 3TX1, 5TX1
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C. Uploading of the ATSU Software and Applications
Refer to the logic diagram
(Ref. Fig. 402/TASK 46-21-34-991-002)
and do only the procedures that are necessary:
(1) Uploading of the ATSU software (Ref. TASK 46-21-00-610-001)
(2)
Initialization of the ATSU router (Ref. TASK 46-21-00-860-001) Subtask 46-21-34-740-050
D.
Do the BITE test of the ATIMS (Ref. TASK 46-21-00-740-001). Subtask 46-21-34-740-051
E. Do the VHF3 Link test of the ATSU (Ref. TASK 46-21-00-710-002) to do a check of the correct operation of the datalink communication.
5. Close-up
________ Subtask 46-21-34-410-050
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
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