(c)
GPS/FMS position disagreement When GPS Primary is active and either FMGC 1 or FMGC 2 latitude (longitude) deviates from either MMR 1 or MMR 2 latitude (longitude) by more than 0.5 Nm, the NAV FMS/GPS POS DISAGREE and A/C POS...........CHECK messages are displayed in amber and cyan respectively on the ECAM DU. These messages are accompanied by:
-activation of the MASTER CAUT lights on the glareshield
-aural warning: Single Chime (SC).
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8. BITE Function_____________
R **ON A/C 051-099,
R A. CFDIU Interface
R (1) BITE description
R The BITE facilitates maintenance on in-service aircraft. It detects
R and identifies a failure related to the MMR. The BITE of the MMR is
R connected to the CFDIU.
R The BITE:
R - transmits permanently MMR status and its identification message to
R the CFDIU,
R - memorizes the failures which occurred during the last 63 flight
R legs,
R - monitors data inputs from the various peripherals,
R - transmits to the CFDIU the result of the tests performed and
R self-tests,
R - can communicate with the CFDIU through the menus.
R The BITE can operate in two modes:
R - the normal mode,
R - the menu mode.
R (a) Normal mode
R During the normal mode, the BITE cyclically monitors the status
R of the MMR. It transmits its information to the CFDIU during the
R concerned flight.
R In case of fault detection, the BITE stores the information in
R the fault memories.
R These items of information are transmitted to the CFDIU by an
R ARINC 429 message with label 356.
R (b) Menu mode
R The menu mode can only be activated on ground.
R This mode enables communication between the CFDIU and the MMR
R BITE by means of the MCDU.
R (Ref. Fig. 016)
R When you get access to the SYSTEM REPORT/TEST/NAV page, the ILS1
R and ILS2 indications can be shown instead of the MMR1 and MMR2
R indications. In this case, you must do the following steps:
R - make sure that the the engines are shut down
R - open CFDIU SUPPLY circuit breaker 2TW
R - open CFDIU BACK UP circuit breaker 8TW
R - make sure that MMR1 and MMR2 circuit breakers, 42RT1 and 42RT2,
R are closed
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MMR - Maintenance Test Procedure
Figure 016
1EFF : ALL 1 34-36-00Page 44 1 1 Config-2 May 01/05R 1 1 1CES 1
R - wait for 30 seconds then close the CFDIU circuit breakers 2TW
R and 8TW
R - wait for 180 seconds then get access to the SYSTEM
R REPORT/TEST/NAV page.
R All the information displayed on the MCDU during the BITE Test
R configuration can be printed by the printer (Ref. 31-35-00).
R The MMR menu mode is composed of:
R - LAST LEG REPORT
R (Ref. Fig. 017)
R This menu contains the fault messages (class 1 internal and
R external) detected during the last flight.
R - PREVIOUS LEGS REPORT
R (Ref. Fig. 018)
R This report contains the fault messages related to the external
R or internal failures (class 1) recorded during the previous 63
R flight legs.
R - LRU IDENTIFICATION
R (Ref. Fig. 019)
R Allows to display the P/N, the serial number and the software
R number of the equipment.
R - GND SCANNING
R (Ref. Fig. 020)
R Based on the monitoring and fault analysis during flight,
R provides information of the failures detected while using this
R function.
R - TROUBLE SHOOTING DATA
R (Ref. Fig. 021)
R Provides correlation parameters and snapshot data concerning
R the failure displayed in the LAST LEG REPORT and PREVIOUS LEGS
R REPORT.
R - CLASS 3 FAULTS
R (Ref. Fig. 022)
R Allows to display the class 3 faults recorded during the last
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