SIRS Navigation KCA0104W - Removal of East-West and North-South Errors

SIRS NAVIGATION LTD
COMPONENT MAINTENANCE MANUAL
C. Removal of East-West and North-South Errors.
1. Turn the aircraft to magnetic north (000 ±2°).
2. Turn the C corrector with the corrector key (220) until the compass shows 000°.
3. Remove the corrector key and make sure the compass does not move.
4. Turn the aircraft to magnetic east (090° ±2°).
5. Slowly turn the B corrector with the corrector key until the compass shows 090°.
6. Remove the corrector key and make sure the compass does not move.
7. Turn the aircraft to magnetic south (180° ±2°).
8. Turn the C corrector with the corrector key (220) until the compass shows 180°.
9. Remove the corrector key and make sure the compass does not move.
10. Turn the aircraft to magnetic West (270°±2°).
11. Slowly turn the C corrector with the corrector key until the compass shows 270°.
12. Remove the corrector key and make sure the compass does not move.
NOTE: The procedures detailed above can be done again if the results are not
accurate.
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PAGE 11003
APR 10/03
34-25-21
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