(4)
GROUND SCANNING (Ref. Fig. 016) This function is used to monitor and detect anomalies on ground.
(5)
TROUBLE SHOOTING DATA (Ref. Fig. 017) This function permits to analyze the snapshot of the recorded fault to detect any software bug. Two types of data are displayed on the MCDU:
-correlation parameters which are the date and the UTC.
-snapshot data.
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VHF system - LAST LEG REPORT Figure 013
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VHF system - PREVIOUS LEGS REPORT Figure 014
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VHF system - LRU IDENT Figure 015
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VHF system - GND SCANNING Figure 016
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VHF system - TROUBLE SHOOT DATA Figure 017
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(6)
CLASS 3 FAULTS (Ref. Fig. 018) This report contains the Class 3 internal and external fault recorded during the last flight.
(7)
TEST (Ref. Fig. 019) A VHF built-in functional test can be initiated by pushing, on the MCDU, the line key adjacent to the TEST indication on the VHF maintenance sub-menu. The test sequence is shown on the figure.
(8)
GROUND REPORT (Ref. Fig. 020) This function is used to display Class 1, 2 or 3 internal faults when they are detected on the ground. These faults differ from those displayed in the LAST LEG REPORT and CLASS 3 FAULTS. The figure shows examples of internal faults recorded on the ground by the VHF system. To utilize the BITE system it is necessary to get through one of the two MCDUs 3CA1 and 3CA2 (Ref. ATA 22-82-00). The MCDUs are installed in the cockpit, on the center pedestal.
R **ON A/C 001-049, 051-060, 101-101,
D. Power-up Tests Initialization and Cockpit Repercussions
(1)
Conditions of power-up tests initialization
-How long the computer must be de-energized: 1 s.
-A/C configuration: . Whatever the A/C configuration on the ground.
(2)
Progress of power-up tests
-Duration: 10 s.
-Cockpit repercussions directly linked to power-up test accomplishment (some other repercussions may occur depending on the A/C configuration but these can be disregarded): . None.
(3)
Results of power-up tests (cockpit repercussions, if any, in case of test pass/test failed).
-Test pass:
-None except audio functions available from selected frequency.
-Tests failed:
-None except audio functions not available from selected frequency.
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VHF system - CLASS 3 FAULTS Figure 018
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VHF system - TEST
Figure 019
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VHF system - GROUND REPORT
Figure 020
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VHF SYSTEM - ADJUSTMENT/TEST
____________________________ TASK 23-12-00-710-001 Operational Test of the VHF System WARNING : MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE
_______ YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT.
NOTE : During this test, the aircraft must be in an open area.
____
NOTE : The transmission and reception test of the VHF system is the same for
____ all the crew stations. You must do the test at each station.
1. Reason for the Job
__________________
To make sure that the reception and transmission from each station operate correctly.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific boomset
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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