Compass Rose Swing - Garmin G5 Maintenance Manual

command and instead use compass rose references to complete the heading change. Dwelling at
these 30° increments for the time recommended by the G5 should result in successful calibration.
11. The G5 instructs the operator to dwell at multiple headings around a complete circle.
12. Repeat the turn-and-stop process until the G5 advises that a successful calibration is complete and
"Calibration: Success" is displayed on the G5.
13. Select "Done" on the G5 to conclude this procedure
14. Exit configuration mode.
15. Continue to Section 7.6.

7.6 Compass Rose Swing

After the Magnetic Calibration Procedure is successfully completed, a compass swing must be
performed to verify the GMU 11 heading accuracy. If each heading displayed on the G5 (or G5 #1 and
G5 #2) is within ±10° of the actual heading no further adjustments are necessary.
1. With the G5(or G5 #1 and G5 #2 for a dual G5 installation) in normal mode, all of the aircraft
and avionics systems powered and operating normally, position the aircraft on a known compass
rose at a heading 360° (North), or select a level and magnetically clean location and use a sight
compass to position the aircraft to a heading of 360° (North).
2. Record the heading displayed on the G5 (or G5 #1 and G5 #2 for a dual G5 installation) in Table
7-2. Also record the heading displayed on the standby compass (these values can be used to
complete the standby compass calibration card).
3. Repeat step 2 for each of the headings listed in Table 7-2.
4. Calculate the heading errors by subtracting the displayed (B) value from the actual (A) value for
each of the headings in Table 7-2.
Heading (A)
360º (North)
30º
60º
90º (East)
120º
150º
180º (South)
210º
240º
270º (West)
300º
330º
5. If all calculated heading errors for the G5 are +/-6° from the surveyed heading, the installation is
acceptable and no further action is required. Proceed to Section 8.
6. If a Heading Error (A-B) is greater than +/- 6°, calculate the average error by adding all errors
and dividing by 12. This is the angle by which the GMU 11 must be physically rotated to correct
Garmin G5 Electronic Flight Instrument Part 23 AML STC Maintenance Manual
Table 7-2: Heading Verification
Displayed G5 Heading
(B)
Page 42 of 54
Heading Error (A-B)
Stby Compass
Heading
190-01112-11
Rev. 7