An FAA wind-direction indicator is out of tolerance when it differs from another indicator on the same sensor by how many degrees?

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Multiple Choice

An FAA wind-direction indicator is out of tolerance when it differs from another indicator on the same sensor by how many degrees?

Explanation:
Wind-direction indicators are checked against a second indicator on the same sensor to ensure accuracy. The two readings must agree within five degrees. If the difference reaches five degrees, it’s considered out of tolerance and the system should be serviced or recalibrated. This five-degree limit is a balance between precision and practical instrument drift, providing a reliable cross-check without demanding unrealistically tight alignment. The other numbers would imply stricter or looser limits than what the standard specifies, so five degrees is the threshold used here.

Wind-direction indicators are checked against a second indicator on the same sensor to ensure accuracy. The two readings must agree within five degrees. If the difference reaches five degrees, it’s considered out of tolerance and the system should be serviced or recalibrated. This five-degree limit is a balance between precision and practical instrument drift, providing a reliable cross-check without demanding unrealistically tight alignment. The other numbers would imply stricter or looser limits than what the standard specifies, so five degrees is the threshold used here.

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