R **ON A/C 106-149, 211-299, 301-399, 401-499,
 C. Indication (Ref. Fig. 020) If you push the GND/CTL button on the control panel, an electric latch holds the override function. The blue GND/CTL button light comes on . The status line of the DFDR is connected to the FDIMU. In case of a Class II
R fault the FDIMU transmits a failure message to the CFDS. These failures R are not indicated to the crew in flight but are the subject of an ECAM R report on the ground after shut down of the engines. If a Class III fault
 occurs the related flag is set in the fault memory of the FDIMU (up to 30 faults). This fault information is sent to the CFDIU. These Class III faults can be displayed on the MCDU screen via menu function (System Report/Inst/FDIU). These faults can wait until the next scheduled maintenance check. In case of malfunction of the CFDS, DFDR FAIL and FDIU FAIL are sent directly via SDAC to the ECAM screen. The status signal DFDR FAULT and FDIU FAULT are suppressed in flight phases 3, 4, 5, 7 and 8 by the FWC.
 1EFF : ALL 1 31-33-00Page 88 1 1 Aug 01/05 1 1 1CES 1

 Event Marker Button Figure 021 
R 1EFF : 1 1 1CES  ALL  1 111 31-33-00 Page 89 May 01/05

R  **ON A/C 151-199, 201-210, 
R  C. Indication 
R  (Ref. Fig. 020) 
R  If you push the GND/CTL button on the control panel, an electric latch 
R  holds the override function. The blue GND/CTL button light comes on. The 
R  status line of the DFDR is connected to the FDIU. In case of a Class II 
R  fault the FDIU transmits a failure message to the CFDS. These failures 
R  are not indicated to the crew in flight but are the subject of an ECAM 
R  report on the ground after shut down of the engines. If a Class III fault 
R  occurs the related flag is set in the fault memory of the FDIU (up to 30 
R  faults). This fault information is sent to the CFDIU. These Class III 
R  faults can be displayed on the MCDU screen via menu function (System 
R  Report/ Instruments/FDIU). These faults can wait until the next scheduled 
R  maintenance check. In case of malfunction of the CFDS, DFDR FAIL and FDIU 
R  FAIL are sent directly via SDAC to the ECAM screen. 
R  The status signal DFDR FAULT and FDIU FAULT are suppressed in flight 
R  phases 3,4,5,7 and 8 by the FWC.
 **ON A/C ALL
 D. Lighting
 The RCDR control-panel has an integral light. You can turn the remote
 OVERHEAD PANEL LIGHT knob to dim the illumination. 

R 1EFF : ALL 1 31-33-00Page 90 1 1 May 01/05 1 1 1CES 1R **ON A/C 001-049, 051-099, 101-105,

 E. Monitoring
 (1)
 Test The power interlock and status monitoring can be partially tested by pushing the GND/CTL button and selecting the related CFDS menu (SYSTEM REPORT/INST/ FDIU) on the MCDU. When the GND/CTL button is pushed it activates the power interlock and the DFDR with playback will give a message on the TEST menu STATUS OF DFDR : PLAYBACK RECEIVED. If a fault occurs or a DFDR is not installed the message FAULT/NOT INSTALLTED comes into view. A second push on the GND/CTL button deactivates the power interlock and the DFDR stops. Now the message DFDR OFF/ON PLAYBACK comes into view on the TEST menu. The function of a DFDR without playback and the QAR cannot be tested. The status of the QAR and the BITE of the DFDR can be checked by activating the GND SCAN menu. To check the correct functioning of the system during operation the monitoring function in each unit (BITE) must be continuously active. For test purposes a line test connector is installed on the FDIU and DFDR front side. With a separate test, the set internal functions of the FDIU and DFDR can be checked. It is possible to print out the BITE memory of the FDIU. The DFDR playback data is also available on the FDIU test connector.

 (2)
 Monitoring The BITE of each unit permanently monitors the FDIU and DFDR. The following monitoring are performed with microprocessor controlled or related circuitry.

 for FDIU
 -
monitoring operation of the microprocessor,

 -
monitoring operation of the gate arrays,

 -
monitoring operation of the memories,

 -
monitoring operation of the input/output interfaces,

 -
monitoring operation of the DFDR playback signal,

 -
monitoring operation of power supply circuitry.

 for DFDR

 -
monitoring operation of the motion of memory,

 -
monitoring operation of the input data stream,

 -
monitoring operation of the recording channel,

 -
　
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