Garmin G3X Installation Manual page 148

9.3.2 Calibration Procedure B: Pitch/Roll Offset Compensation by Aircraft
Leveling
This procedure requires orienting the aircraft to normal flight attitude (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.
The GSU 73 must be leveled within 3.0 degrees 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. Enter configuration mode by holding down the left-hand softkey while powering on the
GDU 37X (if needed).
2. Use the FMS Joystick to select the GSU Page (if needed).
3. Unlock the GSU Page by pressing softkeys 2, 3, 4 in order (if needed).
4. Ensure that all the required status boxes are checked (Tables 9-2 and 9-3).
Page 9-8
Revision E
NOTE
NOTE
Figure 9-2 –Flight Level Cruise Attitude
G3X Installation Manual – Post Installation Checkout and Calibration Procedures
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