(e)
 TROUBLE SHOOTING DATA (Ref. Fig. 010, 011, 012) The TROUBLE SHOOTING DATA allows to display complementary fault information and data concerning the system status before and after the failure occurrence. This information is stored with each failure message. The TROUBLE SHOOTING DATA can be called from the "LAST LEG REPORT", "PREVIOUS LEG REPORT" and "GROUND REPORT".

 (f)
 MEMORY The function MEMORY is used to read internal memories; it provides BITE data for shop use or information for equipment sellers.

 (1)
 Conditions required by the FCDC to initialize the test

 (a) For all tests
 -Aircraft on ground and not moving condition: . at least one ELAC and two SECs send ground condition . LGCIU "NOSE GEAR STATUS" wired signal is at compressed state . "ENGINE PRESSURE STATUS" is at low state . at least two SECs give "WHEEL SPEED less than 6 KTS" information . no SEC sends "WHEEL SPEED more than 66 KTS" information
 -3 hydraulic system pressure on : . at least 3 computers (ELAC or SEC) send "B, G, Y HIGH PRESSURE" information.
 (b) For aileron damping test
 -SEC1 & SEC2 P/BSW "OFF"
 -both ELACs OK
 (c) For elevator damping test
 -ELAC1 & ELAC2 P/BSW "OFF"
 -SEC1 & SEC2 OK

 (2)
 Conditions required by ELAC to initialize test

 -both ELACs available
 -3 hydraulic pressure available
 -ground condition
 -both side sticks at neutral
 -wheel speed less than 6 KTS
 -3 ADIRS switched off
 -both FCDCs available

 (3)
 Conditions required by the SEC to initialize the test

 MAINTENANCE AND SAFETY TESTS/BITE - DESCRIPTION AND OPERATION_____________________________________________________________ 
R  1. General_______ 
R R R R R R R  A. Maintenance The EFCS maintenance system is built around the two FCDCs. (Ref. Fig. 001) The FCDCs - collect the failures detected by the ELACS and the SECs - consolidate the received data - elaborate and generate the maintenance messages to the CFDIU. 
R R R R  B. Periodic Tests There are two periodic tests launched by the CFDIU via the MCDU - aileron servocontrol damping test - elevator servocontrol damping test 
R R R R C. Automatic Tests These tests are built in order to detect hidden failures on standby channels and failures which cannot be detected by continuous monitoring. 
2. Interface_________ For the Centralized Fault Display System (CFDS) the FCDCs are type-1 systems i.e. their inputs/outputs are connected with the Centralized Fault Display Interface Unit (CFDIU) by ARINC 429 buses. Data concerning: - maintenance messages, - tests, - control surface positions are transmitted through the ARINC 429 buses.
 3. Operation_________
 A. Maintenance The LRU failures detected in flight by the ELACs and the SECs are memorized by the FCDCs in non-volatile memories and are permanently transmitted to the CFDIU under label 356. On the ground, using the Multipurpose Control and Display Unit (MCDU), the display in the cockpit of maintenance messages in clear language is effected according to two types: - display specific to the CFDS for line maintenance (rapid troubleshooting) - display specific to flight controls for deeper maintenance.

 EFCS Maintenance System
 Figure 001
 1EFF :  ALL  1  27-96-00 Page 2 
1  1  Feb 01/98
 1  1
 1CES  1

 CFDS Menu
 Figure 002
 1EFF :  ALL  1  27-96-00 Page 4 
1  1  Feb 01/98
 1  1
 1CES  1

 Last Leg Report
 Figure 003
 1EFF :  ALL  1  27-96-00 Page 5 
1  1  Feb 01/98
 1  1
 1CES  1

 Previous Leg Report
 Figure 004
 1EFF :  ALL  1  27-96-00 Page 6 
1  1  Feb 01/98
 1  1
 1CES  1

 System Report/Test (Access Page to F/CTL)
 Figure 005
 1EFF :  ALL  1  27-96-00 Page 7 
1  1  Feb 01/98
 1  1
 1CES  1

 EFCS 1 (2) Menu
 Figure 006
 1EFF :  ALL  1  27-96-00 Page 8 
1  1  Feb 01/98
 1  1
 1CES  1

 Last Leg Report and Previous Leg Report
　
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