(i.e. further to long power cutoff) and on flight phase 1/2
transition.
*
Parameters from :
. FAC 1 (labels 233 ---> 236, 040 --->042)
. FDIU (labels 301 ---> 304):
These labels are acquired at each flight phase transition
and at power-up.
*
Parameters from :
. FWC 1/2 (label 126)
. PRINTER (labels 303, 350) (IF INSTALLED)
. MCDU 1/2 (labels 303, 270)
. CLOCK (labels 125, 260):
These labels are acquired permanently.
*
Parameters from MCDU 3 (labels 303, 270)(If installed):
R 1EFF : 001-049, 051-099, 101-105, 151-154, 1 31-32-00Page B28 1201-207, 1May 01/05 1 1 1CES 1 As the MCDU 3 is supplied on the ground only, these parameters are permanently acquired on the ground (under NULL or DC2).
-Criteria of monitoring
*
For the FAC 1, FDIU, DMC 1, AMU, CIDS 1, monitoring consists in checking labels only when they are used.
*
For the MCDU PRINTER, CLOCK and CFDIU, monitoring is of the permanent type.
*
For the FWCs, monitoring is described below.
(b) Description of faults
-Monitoring of the FAC 1 (external fault)
The FAC 1 provides the following parameters: Flight Number : labels 233, 234, 235, 236 City Pair : labels 040, 041, 042.
In the event of incorrect reception of at least one of these labels (label absent, confirmation over 3 cycles), the CFDIU memorizes:
"NO FAC 1 DATA"
-Monitoring of the FDIU (external fault)
The FDIU provides the following parameter:
A/C Identification : labels 301, 302, 303, 304.
In the event of incorrect reception of at least one of these
labels (label absent, confirmation over 3 cycles), the CFDIU
memorizes:
"NO FDIU DATA"
-
Monitoring of the FWC 1 and 2 (external faults)
Monitoring described below.
-
Monitoring of the DMC 1 (external fault)
The DMC 1 provides the following parameters:
Engine serial number : labels 46, 47
A/C configuration : label 305.
In the event of incorrect reception of label 305, (label
absent,
confirmation over 3 cycles), the CFDIU memorizes:
"NO DMC 1 DATA"
-Monitoring of the AMU (external fault)
The AMU provides the following parameter:
A/C configuration : label 350.
In the event of incorrect reception (label absent or SSM at FW
confirmation over 3 cycles) of this label, the CFDIU memorizes:
"NO AMU DATA"
-Monitoring of the CIDS 1 (external fault)
The CIDS 1 provides the following parameter:
A/C confirmation : label 146. In the event of incorrect reception (label absent or SSM at FW confirmation over 3 cycles) of this label, the CFDIU memorizes:
R 1EFF : 001-049, 051-099, 101-105, 151-154, 1 31-32-00Page B29 1201-207, 1May 01/05 1 1 1CES 1 "NO CIDS 1 DATA"
-
Monitoring of the MCDU 1 and 2 (external faults) In the event of incorrect reception (label absent or SSM at FW, confirmation over 3 cycles) of label 270, the CFDIU memorizes:
"NO MCDU (1 or 2) DATA"
-
Monitoring of the PRINTER (if installed) (external fault) In the event of incorrect reception (label absent or SSM at FW, confirmation over 3 cycles) of label 350, the CFDIU memorizes:
"NO PRINTER DATA" (details of label 350 are given in the ARINC 740 specification)
-
Monitoring of CFDIU, MCDU 3 (if installed) and clock (internal faults) Monitoring and associated message are identical to the case of the Normal Mode described above.
(2)
LRU identification function The purpose of this function is to display the computer part number.
(3)
GROUND SCANNING function The purpose of this function is to present the internal or external faults on the ground, whether these faults are already present in flight or not. These faults are detected through monitoring activated on manual selection of the function.
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