-
W/S warning alert (level 3)
-
W/S AUTO/OFF
-
W/S internal fault
-
W/S external fault
-DMCs/FWCs PWS pin program status.
This data, except the PWS pin program status, is only transmitted
from the DMCs if the DMCs/FWCs PWS pin program is valid (grounded).
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R **ON A/C 001-049, 101-149, 151-199, 201-299, 301-399, 401-499,
E. Reconfiguration switching **ON A/C 001-049, 101-105,
R (Ref. Fig. 002) **ON A/C 106-149, 201-299, 301-399, 401-499,
(Ref. Fig. 002A) **ON A/C 151-199,
R (Ref. Fig. 002B) **ON A/C 001-049, 101-149, 151-199, 201-299, 301-399, 401-499,
In normal configuration, the weather radar transceiver receives the altitude information from its corresponding ADIRU. In case of ADIRU1 failure, the pilot can select the altitude information from the ADIRU3. This selection is through the AIR DATA selector switch installed on panel 8VU, on the center pedestal.
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R **ON A/C 051-099,
R E. Reconfiguration switching
R (Ref. Fig. 002A)
R In normal configuration, each weather radar transceiver receives the
R altitude information from its corresponding ADIRU.
R In case of ADIRU1/2 failure, the pilot can select the altitude
R information from the ADIRU3.
R This selection is through the AIR DATA selector switch installed on panel
R 8VU, on the center pedestal.
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8. Test
____
A. BITE Description
(1) General The BITE facilitates maintenance on in-service aircraft. It detects and identifies a failure related to the system. The BITE of the WR/PWS is situated in the radar transceiver and through two ARINC 429 low-speed buses (an input bus from the CFDIU and an output bus to the CFDIU). The BITE:
-transmits permanently weather radar system status and its identification message to the CFDIU,
-memorizes the failures which occurred during the last 63 flight legs,
-monitors data inputs from the various peripherals (EFIS control section, ADIRUs, RAs),
-transmits to the CFDIU the result of the tests performed and self-tests,
-can communicate with the CFDIU through the MCDU menus.
-acquires the general maintenance parameters (UTC, date, A/C
ident...) and command codes from the CFDIU. The PWS interface with the CFDIU is composed of:
-
an ARINC 429 low speed bus from the CFDIU. The data sent by the CFDIU are:
---------------------------------------------------------| LABEL | PARAMETER | FORMAT | ---------------------------------------------------------| 125 | UTC | BCD | | 155 | AIRCRAFT CONFIGURATION 1 | DISC | | 156 | AIRCRAFT CONFIGURATION 2 | DISC | | 227 | COMMAND | DISC | | 260 | DATE | BCD | | 301 | AIRCRAFT IDENT | ISO | | 302 | AIRCRAFT IDENT | ISO | | 303 | AIRCRAFT IDENT | ISO | ---------------------------------------------------------
-
an ARINC 429 low speed output bus to the CFDIU: The data sent to the CFDIU are:
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---------------------------------------------------------
| LABEL | PARAMETER | FORMAT | ---------------------------------------------------------| 354 | LRU IDENTIFICATION | ISO | | 356 | FAULT MESSAGES | ISO | | 377 | EQUIPMENT IDENTIFICATION | BCD | ---------------------------------------------------------The BITE can operate in two operating modes:
*
in normal mode, to report continuously the failures of all classes, depending on the maintenance flight phase,
*
in interactive mode, to provide an interactive dialog with an operator using an MCDU.
NOTE : The WR/PWS complies with Specification ABD0048, issue C.
____
R **ON A/C 001-049, 101-105, 151-199,
(2)
Normal mode During the normal mode the BITE monitors cyclically the status of the WR/PWS. It transmits its information to the CFDIU during the concerned flight. In case of fault detection the BITE stores the information in the fault memories. These items of information are transmitted to the CFDIU by an ARINC 429 message with label 356.
(3)
Interactive mode The interactive mode can only be activated on the ground and through the line key adjacent to the RADAR 1 indication, presented on the SYSTEM REPORT/TEST/NAV page of any MCDU. This mode enables communication between the CFDIU and the BITE of the weather radar transceiver by means of the MCDU. (Ref. Fig. 018) The interactive mode is composed of:
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