Subtask 34-42-00-210-051
B. Detailed Inspection of the two RA transceiver Fans
(1)
Do a detailed visual inspection of the two RA transceiver fans and of the fan housing.
(2)
Remove the RA transceiver fans (Ref. TASK 34-42-45-000-001).
(3)
Lock the RA transceiver fans and their housings to prevent movement. NOTE : When you clean the fan with the air blower, the fan can turn
____ too quickly and thus a fault can occur.
(4)
Clean the RA transceiver fans and their housings with a soft brush and/or an air blower.
(5) Install the RA transceiver fans (Ref. TASK 34-42-45-400-001). R
Subtask 34-42-00-420-050
C. Install the two Radio Altimeter Transceivers (Ref. TASK 34-42-33-400-001).
R (1) Close the circuit breakers 1SA1 and 1SA2 on the panel 121VU. Subtask 34-42-00-720-053
D. Functional Test
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the rear circuit breaker panel In the aft cargo compartment (zone 152, 121VU: door 826), below the transceiver mount:
- open the circuit breaker 1SA1 - make sure that the RA transceiver fan (1SA2). 3SA1 (3SA2) does not blow.
-close the circuit breaker 1SA1 - make sure that the RA transceiver fan (1SA2). 3SA1 (3SA2) blows air up.
1EFF : ALL 1 34-42-00Page 507 1 1 Aug 01/05 1 1 1CES 1 1EFF : ALL 1 34-42-00Page 508 1 1 Aug 01/02 1 1 1CES 1
R Subtask 34-42-00-740-052
R E. Do the BITE test of the radio altimeter (Ref. TASK 34-42-00-740-002).
R NOTE : If the airline operates the aircraft in CAT III conditions, you____
R must also do the LAND CAT III capability test (Ref. TASK 22-97-00-
R 710-001).
5. Close-up________
R Subtask 34-42-00-410-050
R A. Close Access
R (1) Install the sidewall panel 152GW.
R (2) Close the aft cargo door 826 (Ref. TASK 52-30-00-860-002).
R (3) Remove the access platform(s).
R Subtask 34-42-00-865-059
R B. Make sure that this(these) circuit breaker(s) is(are) closed:
R 1SA1, 1SA2
Subtask 34-42-00-860-057
R C. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
(2) Make sure that the work area is clean and clear of tool(s) and other
items.
TASK 34-42-00-730-002 Ramp Test of the Radio Altimeter WARNING : MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE
_______ YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT.
1. Reason for the Job__________________ Test of the automatic simulation of a change in altitude.
2. Job Set-up Information______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power
24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power
31-32-00-860-010 Procedure to Get Access to the SYSTEM REPORT/TEST NAV
Page 31-60-00-860-001 EIS Start Procedure 31-60-00-860-002 EIS Stop Procedure
3. Job Set-up
__________ Subtask 34-42-00-860-052
A. Aircraft Maintenance Configuration
(1)
Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
(2)
On the center pedestal, on one MCDU, get the SYSTEM REPORT/TEST/NAV page (Ref. TASK 31-32-00-860-010).
(3)
Do the EIS start procedure (PFDs only) (Ref. TASK 31-60-00-860-001).
(4)
On the overhead panel, on the ADIRS CDU, set the OFF/NAV/ATT selector switches to NAV.
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