-
Different languages (PASCAL and PL/M)
-
Different algorithms.
A specific methodology applied from the design phase to the programming
phase ensures a safety level compatible with the FAC functions.
Specific monitoring functions are introduced:
-In the hardware (watchdog)
-in the software (real-time monitor)
to ensure the correct execution of the software.
The software is organized in fast or slow tasks and in background tasks
which can be delayed.
We therefore have:
-
A fast cycle (yaw computation)
-
A slow cycle (computation of other functions except weight)
-
A very slow cycle (weight computation).
1EFF : ALL 1 22-66-00Page 6 1 1 Feb 01/98 1 1 1CES 1
FLIGHT AUGMENTATION COMPUTER (FAC) - DEACTIVATION/REACTIVATION
______________________________________________________________
TASK 22-66-00-040-001
Deactivation of the FAC 2
1. Reason for the Job
__________________
Refer to the MMEL TASK: 22-66-01-B)
Flight Augmentation
Flight Augmentation Computer
FAC 2
R (FAA Only)
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific warning notice
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power
3. Job Set-up
__________
Subtask 22-66-00-861-050
A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
1EFF : ALL 1 22-66-00Page 401 1 1 Nov 01/98 1 1 1CES 1
Subtask 22-66-00-865-050
B. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU AUTO FLT/FAC2/28VDC 5CC2 M19
4. Procedure
_________
Subtask 22-66-00-040-050
A. Deactivation of the FAC 2
(1) On the overhead panel 24VU, release the FLT CTL/FAC 2 pushbutton R switch (the OFF legend goes on).
(2) Open and safety tag the circuit breaker 5CC2 (ignore the related warnings).
5. Close-up
________
Subtask 22-66-00-942-050
A. Safety Precautions
(1) Put a warning notice on the FLT CTL/FAC2 pushbutton switch, to tell the crew that the FAC 2 is deactivated.
(a)
Make an entry in the log-book.
Subtask 22-66-00-862-050
B.
De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
1EFF : ALL 1 22-66-00Page 402 1 1 May 01/03 1 1 1CES 1
TASK 22-66-00-440-001
Reactivation of the FAC 2
1. Reason for the Job
__________________
Refer to the MMEL TASK: 22-66-01-B)
Flight Augmentation
Flight Augmentation Computer
FAC 2
R (FAA Only)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power
3. Job Set-up
__________
Subtask 22-66-00-861-051
A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002). Subtask 22-66-00-865-051
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
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