What error is the heading indicator (directional gyro) subject to, and how do you correct it?
Answer
The heading indicator is subject to precession error — it slowly drifts from the correct heading. It must be realigned with the magnetic compass approximately every 15 minutes during straight and level flight.
PHAK Ch. 8 — Flight Instruments
Test yourself on this and 500+ more
Squawk Box is a free aviation micro-learning app. Flip cards, build streaks, stay sharp.
Try Squawk Box