I had to update my Cherokee's Whiskey compass and found this article really useful:
https://www.eaa.org/en/eaa/aviation...instruments-and-avionics/swinging-the-compass
It explains the procedures in simple, easy-to-understand terms:
1. Taxi the airplane into position onto the Compass Rose with the nose aligned with the NORTH magnetic reference line of the Compass Rose. Adjust the N-S screw with a non-magnetic screwdriver so that the compass reads exactly NORTH (0 degrees).
2. Next, realign the aircraft on the Compass Rose with the nose pointing in a magnetic EAST direction. Adjust the E-W screw until the compass reads EAST (090 degrees) exactly.
3. Turn the aircraft to a magnetic SOUTH direction and note the resulting SOUTH error . . . if any. Readjust the N-S screw until you have removed one-half of the error.
4. Next, head the aircraft so it points to a magnetic WEST direction. Readjust the E-W to remove one-half of the E-W error.
5. Finally, turn the aircraft to successive 30 degree headings and record the resultant readings on your compass correction (deviation) card.
Also, here's a link to a word doc template you can use to print out a new compass deviation card:
http://www.csobeech.com/compass-correction.html
https://www.eaa.org/en/eaa/aviation...instruments-and-avionics/swinging-the-compass
It explains the procedures in simple, easy-to-understand terms:
1. Taxi the airplane into position onto the Compass Rose with the nose aligned with the NORTH magnetic reference line of the Compass Rose. Adjust the N-S screw with a non-magnetic screwdriver so that the compass reads exactly NORTH (0 degrees).
2. Next, realign the aircraft on the Compass Rose with the nose pointing in a magnetic EAST direction. Adjust the E-W screw until the compass reads EAST (090 degrees) exactly.
3. Turn the aircraft to a magnetic SOUTH direction and note the resulting SOUTH error . . . if any. Readjust the N-S screw until you have removed one-half of the error.
4. Next, head the aircraft so it points to a magnetic WEST direction. Readjust the E-W to remove one-half of the E-W error.
5. Finally, turn the aircraft to successive 30 degree headings and record the resultant readings on your compass correction (deviation) card.
Also, here's a link to a word doc template you can use to print out a new compass deviation card:
http://www.csobeech.com/compass-correction.html
