(b) Description of faults Monitoring and associated message are identical to the case of the LAST LEG REPORT.
 NOTE : This manually activated monitoring does not entail
____ acquisition of monitored parameters by the CFDIU.
 (4) POWER-UP TEST RESULT function The purpose of this function is to present the CFDIU internal components detected faulty during the last Power-Up Test. The ATA reference 31-32-34 is associated with each fault message.
 (a) In the event of fault, the following messages are displayed:
 -
CFDIU I/0 ARINC 1 (or 2 or 3) for fault of multiplexor 1, 2 or 3

 -
CFDIU I/0 DISCRETE 1 (or 2) for fault of discrete inputs/outputs 1 or 2

 -
CFDIU BITE MEMORY for fault in NVM

 -
CFDIU for any other fault of the channel

 **ON A/C ALL
 E. Monitoring of the FWC 1 and 2 The FWC 1 is connected to the "switch" only (FWC 1 to FWC 2) while the FWC 2 is connected to the switch and to the multiplexor 2.
 (1) Monitoring of the FWC 1
 (a) Processing of label 356 In the event of incorrect reception of label 356 (not refreshed, confirmation over 3 s), the CFDIU carries out the following processing :
 -No switching to the FWC 2 real-time display and as long as fault is present, of the NO FWC 1 DATA message in the AVIONICS STATUS of the CFDS (function accessible under NULL).
 -Real-time memorization of the NO FWC 1 DATA message in the LAST LEG REPORT of the CFDS, if the fault is present in flight (DC2 or DC1).
 (b) Processing of label 126 In the event of incorrect reception of label 126 (label absent or SSM at FW, confirmation over 3s), the CFDIU carries out the following processing :
 1EFF : ALL 1 31-32-00Page B35 1 1 May 01/05R 1 1 1CES 1

 -Switching to the FWC 2 (consequently, the FWC 1 is no longer monitored).
 -Memorization of the NO FWC 1 DATA message in the LAST LEG REPORT of the CFDIU:
 *
 in real-time (with the occurrence time of the fault) if the fault occurs during DC1

 *
 with the DC2/DC1 transition time, if the failure occurs under NULL or DC2 (switching to FWC 2).

 -Presentation of the NO FWC 1 DATA message in the GROUND SCANNING of the CFDIU if the fault is present on activation of this function (switching to FWC 2).
 NOTE : There is no message (NO FWC 1 DATA or CFDS) in the
____ AVIONICS STATUS or in the LAST LEG REPORT of the CFDS.
 REMARK : In the event of switching to the FWC 2 (in this case, the FWC 1 and therefore labels 356 and 013 are no longer monitored), the CFDIU performs by default processing corresponding to label 126 processing and does not display the messages corresponding to processing of labels 356 and
 013.

 (c)
 Processing of label 013 In the event of incorrect reception of label 013 (label absent or SSM at FW, confirmation over 3 cycles), the CFDIU carries out the following processing:

 -no switching to the FWC 2
 -presentation of the NO FWC 1 DATA message in the GROUND SCANNING of the CFDIU if the fault is present on activation of this function.
 NOTE : There is no message (NO FWC 1 DATA or CFDS) in the LAST
____ LEG REPORT or in the AVIONICS STATUS of the CFDS or in the LAST LEG REPORT of the CFDIU.
 (2) Monitoring of the FWC 2
 (a)
 Processing of label 356
 Identical to processing of FWC 1.

 (b)
 Processing of label 126 1st case : The CFDIU works with the FWC 1 : label 126 of the FWC 2 is not monitored. 2nd case : The CFDIU switched to the FWC 2 : In the event of incorrect reception of label 126 :

 -
the CFDIU memorizes in real time the NO FWC 2 DATA message in the LAST LEG REPORT of the CFDIU if the fault occurs during DC1

 -
the CFDIU presents the NO FWC 2 DATA message in the GROUND SCANNING of the CFDIU if the fault is present on activation of this function.

 1EFF : ALL 1 31-32-00Page B36 1 1 May 01/05R 1 1 1CES 1

 NOTE : There is no message (NO FWC 2 DATA or CFDS) in the
____ AVIONICS STATUS or in the LAST LEG REPORT of the CFDS.
 (c) Processing of label 013 1st case : The CFDIU works with the FWC 1 : label 013 of the FWC 2 is not monitored. 2nd case : The CFDIU switched to the FWC 2 : In the event of incorrect reception of label 013, the CFDIU presents the NO FWC 2 DATA message in the GROUND SCANNING of the CFDIU if the fault is present on activation of this function.
 NOTE : There is no message (NO FWC 2 DATA or CFDS) in the
____ AVIONICS STATUS or in the LAST LEG REPORT of the CFDS or in the LAST LEG REPORT of the CFDIU.
 F. SYSTEM REPORT TEST - Indicating/Recording Systems - CFDIU (Ref. Fig. 057)
　
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