(2)
Do the EIS start procedure (CAPT ND only)(Ref. TASK 31-60-00-860-001).
(3)
Do the IR alignement procedure (Ref. TASK 34-10-00-860-004).
(4)
On the windshield center post, pull the standby compass support that you can retract from its housing.
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4. Procedure
_________ Subtask 34-22-00-710-050
A. Operational Test of the Standby Compass
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1.
On the CAPT ND, read the magnetic heading value.
2.
On the overhead panel, on the ADIRS CDU:
-set the OFF/NAV/ATT selector switch related to the IR1 to OFF.
3.
On the INT LT section of the overhead panel 25VU:
-
set the STBY COMPASS switch to ON.
-
set the STBY COMPASS switch to STBY COMPASS.
R Subtask 34-22-00-210-050 Make sure that:
-the difference between the magnetic heading values on the standby compass and the ND is not more than + or -8..
NOTE : If the difference between the
____ magnetic heading values on the standby compass and the ND is more than + or - 8. : do the compensation adjustment/test of the standby compass (Ref. TASK 34-22-00-730-001).
On the standby compass:
-the lighting is on
-you can read the compass cards from the CAPT and F/O seats.
-the lighting goes off.
R B. Visual Inspection of the Standby Compass
R (1) Make sure that:
R - the support is in good condition
R - the standby compass is correctly attached to the support
R - there are no leaks.
R (2) In the compass bowl, make sure that the liquid:
R - is clear
R - does not contain bubbles or sediment.
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5. Close-up
________ Subtask 34-22-00-860-051
A. Put the aircraft back to its initial configuration.
(1)
Do the EIS stop procedure(Ref. TASK 31-60-00-860-002).
(2)
On the windshield center post, push the standby compass support into its housing.
(3)
De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
(4)
Put the aircraft back to the serviceable condition.
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Compensation Adjustment/Test of the Standby Compass
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 adjust the compensation of the standby compass
-
to find the deviation curve of the compass values when they are more than + or - 8. from the magnetic heading.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific 2 mm-wide non magnetic screwdriver
CE2-40 1 COMPENSATION KEY
B. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the APU 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
from the APU
31-60-00-860-001 EIS Start Procedure
31-60-00-860-002 EIS Stop Procedure
34-10-00-860-004 IR Alignment Procedure
34-10-00-860-005 ADIRS Stop Procedure
R 34-22-00-710-001 Operational Check of the standby compass including
R light test and visual check
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3. Job Set-up
__________
Subtask 34-22-00-860-052
A. Aircraft Maintenance Configuration
NOTE : For this procedure the aircraft must be on a compensation base
____ that can support the weight of the aircraft. The compensation base must be:
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