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TASK 22-70-00-710-003
Operational Test of the Automatic Switching of the MCDUs WARNING : MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE
_______ YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT.
1. Reason for the Job
__________________
To make sure that the automatic switching of the MCDUs occurs correctly when one FMGC does not operate.
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 22-70-00-860-057
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
Subtask 22-70-00-865-055
B. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AUTO FLT/FMGC/1 10CA1 B02
49VU AUTO FLT/MCDU/1 11CA1 B01 121VU AUTO FLT/FMGC/2 10CA2 M17 121VU AUTO FLT/MCDU/2 11CA2 N20
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4. Procedure
_________
Subtask 22-70-00-710-055
A. Operational Test of the Automatic Switching of the MCDUs
NOTE : This test is for the system 1. For the system 2, use the
____
indications between the parentheses.
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the center pedestal:
- On the MCDU1 and the MCDU2,
turn the BRT knobs to make the
light more or less bright.
- On the MCDU1 and the MCDU2, The MCDU MENU page comes into view.
push the MCDU MENU mode key.
- On the MCDU1 and the MCDU2, On the two MCDUs, a FM page comes into
push the line key adjacent to view.
the FMGC indication.
- On the MCDU1(2), push the INIT On the MCDU1(2), the INIT page comes
mode key. into view.
- On the MCDU2(1), push the DATA On the MCDU2(1), the DATA INDEX page
mode key. comes into view.
- On the MCDU2(1), push the line On the MCDU2(1), the A/C STATUS page
key adjacent to the A/C STATUS comes into view.
indication.
2. Open the circuit breaker On the MCDU1(2), the SUBSYSTEM page
10CA1(2). comes into view (with the FMGC TIME OUT
and PRESS MCDU MENU KEY indications in
view).
3. On the center pedestal, on the
MCDU1(2)
- Push the MCDU MENU mode key. The MCDU MENU page comes into view.
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-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
-
Push the line key adjacent to the FMGC indication.
-
Push the CLR function key.
4.
Close the circuit breaker 10CA1(2).
5.
On the center pedestal, on the MCDU1(2), push the MCDU MENU mode key.
5. Close-up
________
Subtask 22-70-00-862-053
On the MCDU1(2), the INIT page comes
into view (with the OPP FMGC IN PROCESS
indication in view).
On the MCDU1(2), the OPP FMGC IN
PROCESS indication goes out of view.
On the MCDU1(2), the SUBSYSTEM page
comes into view after some minutes
(with the FMGC TIME OUT and PRESS MCDU
MENU KEY indications in view).
On the two MCDUs, the A/C STATUS pages
come into view.
The PLEASE WAIT indications come into
view.
After the resynchronization time, the
PLEASE WAIT indications go out of view.
A. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
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_________________________________________________
1. General
_______ The Flight Management System may contain two different flight plans. The first, called active flight plan, is used as a basis for primary display on the MCDU and the ND, for deviation signal evaluations, radio navigation autotuning, performance predictions, fuel planning and lateral and vertical guidance when coupled to the autopilot. The other is the secondary flight plan. It is used for display only. It can be used to prepare a second departure procedure before takeoff, for routing comparison, to prepare the next flight leg (laterally and performance wise). Each flight plan is composed of the same elements (Ref. para. 2A):
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