7.5 G5 Calibration Procedures
Table 7-2
describes the calibration procedures to be performed for the G5 unit after maintenance is
performed.
Calibration
Procedure
A
Pitch/Roll Offset Compensation
Air Data Static Pressure
C
Calibration
7.5.1 Calibration Procedure A: Pitch/Roll Offset Compensation
NOTE
This procedure requires orienting the aircraft to normal flight attitude. This can be done by
using jacks or placing wood blocks under the nose-wheel, for example. As another example, if
the number of degrees 'nose high' the aircraft flies in straight and level cruise is known, a digital
level can be used to orient the aircraft to normal flight attitude prior to the calibration.
NOTE
The G5 must be leveled within 15.0° of the aircraft in-flight level cruise attitude. In-flight level
cruise attitude is not necessarily the same as the level reference provided by the manufacturer
(such as fuselage longerons).
1. Select the Attitude configuration page.
2. Select Calibrate Pitch/Roll.
3. Ensure that aircraft and the unit comply with all on-screen instructions then select Start.
4. A progress screen will then be displayed. There is a 30 second countdown timer for the procedure
that resets when the aircraft moves.
5. When the calibration is complete, a successful status message will be displayed along with the
new pitch and roll offsets.
7.5.2 Calibration Procedure C: Air Data Static Pressure Calibration
The Air Data configuration page has a selection for static pressure calibration. This procedure is used to
perform an altimeter re-calibration. The altitude pressure sensor used in the G5 is very low drift and does
not typically require re-calibration.
The static pressure calibration requires the use of a pressure control system (test set) with an altitude
accuracy of at least ±5 ft. at sea level and ±20 ft. at 30,000 ft. It is necessary to re-calibrate to sea level (0
ft.), 10,000 ft., 20,000 ft., and optionally to 30,000 ft. The operator is allowed to finish the calibration at
the end of the 20,000 ft. calibration if the aircraft operational ceiling is below 20,000 ft.
Garmin G5 Electronic Flight Instrument Part 23 AML STC Maintenance Manual
Table 7-2: Calibration Procedure Summary
Procedure Name
Page 17 of 18
Procedure
Description
Procedure A is required if a new
Level aircraft
G5 unit is installed
Procedure C is recommended if
Altitude calibration
the G5 altimeter does not match
primary altimeter
Requirement
190-01112-11
Rev. 1
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