17. When should a Direct Indicating Compass be “swung”?
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Join Date: Apr 2000
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17. When should a Direct Indicating Compass be “swung”?
When should a Direct Indicating Compass be “swung”?
I have information stating 'change of mag lat' and 'lightning strike' but would appreciate more information. Humorous reasons also welcomed. Thanks in advance.
I have information stating 'change of mag lat' and 'lightning strike' but would appreciate more information. Humorous reasons also welcomed. Thanks in advance.
I guess the relevant maintenance schedules will list the occasions when a direct reading compass must be reswung but a few spring to mind:-
Whenever there is a significant change in a/c components which might affect deviation - eg new wing etc!
At certain calendar periods (two years ?)
Whenever the correct operation of the compass is in doubt - pilot report in tech log?
Hope this helps a little
Whenever there is a significant change in a/c components which might affect deviation - eg new wing etc!
At certain calendar periods (two years ?)
Whenever the correct operation of the compass is in doubt - pilot report in tech log?
Hope this helps a little
Join Date: Feb 2002
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The full list which we teach is:
a when compass componenets are installed or replaced
b whenever the accuracy of the compass is in doubt
c after a maintenance inspection, if required by the schedule
d after a significant aircraft modification, repair or replacement involving magnetic material
e when carrying unusual ferromagnetic payloads
f when the compass has bee exposed to significant shock (heavy landing?)
g if the aircraft has been struck by lightning!
h after significant modifications to the aircraft radio or electrical system
i if the aircraft has been in long term storage standing on one heading
j if a change to a new theatre of operations involves a large change of magnetic latitude (though quite honestly, I don't think this one has much application in practice - after all they don't re-swing an aircraft compass on every turn-round on long-haul from UK to Singapore and back!)
a when compass componenets are installed or replaced
b whenever the accuracy of the compass is in doubt
c after a maintenance inspection, if required by the schedule
d after a significant aircraft modification, repair or replacement involving magnetic material
e when carrying unusual ferromagnetic payloads
f when the compass has bee exposed to significant shock (heavy landing?)
g if the aircraft has been struck by lightning!
h after significant modifications to the aircraft radio or electrical system
i if the aircraft has been in long term storage standing on one heading
j if a change to a new theatre of operations involves a large change of magnetic latitude (though quite honestly, I don't think this one has much application in practice - after all they don't re-swing an aircraft compass on every turn-round on long-haul from UK to Singapore and back!)
