R **ON A/C ALL
1_ Detection/memorization of faults in BITEs:
Transition to flight is defined "at the soonest" or "at the
latest" depending on whether the flight number is entered by
the crew before takeoff or not.
a In flight : (maintenance phases corresponding to DC2 or_
DC1)
- Phases corresponding to DC2:
(memorized phase = NULL confirmed over 120 s) and (engine
running = running confirmed over 180 s) and ((flight
phase more than or equal to 4 and less than 9) or (flight
number SSM at NO and acquired flight number different
from memorized flight number)).
The system BITE ensures detection and permanent
memorization of its class 1 and 2 internal faults in the
"flight memory" (zones 1 and 2 of the BITE) and class 3
in zone 5 of the BITE.
- Phases corresponding to DC1:
(memorized phase = DC2 confirmed over 30 s).
The system BITE ensures detection and permanent
memorization of its class 1 and 2 internal and external
faults in the "flight memory" (zones 1 and 2) and class 3
in zone 5.
b On the ground : (maintenance phases corresponding to NULL)_
(memorized phase = DC1 or DC2) and ((flight phase more than
or equal to 9b and less than 4) or (engine running =
shutdown confirmed over 4 s)).
The system BITE ensures detection and permanent
memorization of its class 1 and 2 internal faults in the
"ground memory" (zone 3) and class 3 in zone 5.
These flight and ground faults concern the last 64 flights
(or 400 flight hours for class 3).
Furthermore, the system BITE ensures permanent memorization
of more detailed data concerning the faults (data at LRU
parts level) in zone 4. These data are only accessible in
the workshop (test bench).
2_ Transmission of these data to the CFDIU
In flight and on the ground:
The system BITE ensures the permanent transmission on its
output bus of the part of the flight memory concerning the
identity of the LRUs declared faulty (internal or external,
(b) Operation of Type 2 systems
**ON A/C 001-049, 051-099, 101-105, 151-154, 201-207,
(Ref. Fig. 009)
R **ON A/C 106-149, 155-199, 208-299, 301-399, 401-499,
(Ref. Fig. 009A)
**ON A/C ALL
1 Detection/memorization of faults in BITEs :
_
a In flight :
_ The system BITE ensures detection and permanent memorization of its class 1, 2, and 3 internal and external faults in the flight memory (zone 1).
b On the ground :
_ The system BITE ensures detection and permanent memorization of its class 1, 2 and 3 internal faults in the ground memory (zone 3). These flight and ground faults concern the current and the last flight. Furthermore, the system BITE ensures memorization of complementary or more detailed data of these failures in zones 2 and 4. These data are only accessible in the workshop (test bench).
2 Transmission of these data to the CFDIU :
_ In flight and on the ground : The system BITE ensures the permanent transmission on its output bus of the flight and ground memories contents (zones 1 and 3).
1EFF : ALL 1 31-32-00Page 33 1 1 Aug 01/05 1 1 1CES 1
CFDIU - Fault Storage in System BITE and Transmission
to the CFDIU : Normal Mode/Type 2 Systems
Figure 009
R 1EFF : 001-049, 051-099, 101-105, 151-154, 1 31-32-00Page 34 1201-207, 1May 01/05 1 1 1CES 1
CFDIU - Fault Storage in System BITE and Transmission
to the CFDIU: Normal Mode/Type 2 Systems
Figure 009A
R 1EFF : 106-149, 155-199, 208-299, 301-399, 1 31-32-00Page 35 1401-499, 1Aug 01/05 1 1 1CES 1 This transmission is made on label 356 at a fixed rate of between 50 ms and 250 ms depending on the system. The flight and ground memories are erased at each ground to flight transition.
(c) Operation of Type 3 systems
1 Detection of faults in BITE in flight and on the ground.
_ The system BITE ensures permanent detection of its class 1, 2 and 3 internal and external faults (no memorization).
2 Transmission of these data to the CFDIU in flight and on the
_ ground. The system BITE ensures permanent transmission on its output discrete of correct or faulty operation information.
R **ON A/C 001-049, 051-099, 101-105, 151-154, 201-207,
(d) CFDIU operation (Ref. Fig. 010, 011) The CFDIU carries out a permanent scan of inputs from each system connected (Type 1, 2 or 3), in flight and on the ground. However, CFDIU processing is not the same depending on whether it is performed on the ground or in flight.
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