Maintenance Manual 190-02472-02G3X Touch EFIS Part 23 AML STC Revision 2Page 79Figure 7-2 – Pitch/Roll Offset Calibration in ProgressNOTEThe GSU 25D pitch/roll offset procedure has a 30 second countdown timer that resets if the aircraftmoves.6. When the calibration has completed “Success” or “Failure” will be displayed; select the DONEsoftkey to return to the ADAHRS Calibration screen.Figure 7-3 – Pitch/Roll Offset Completion StatusNOTEMagnetometer Calibration must be completed after each ADAHRS pitch/roll offset calibration.NOTEThe subsequent ADAHRS and magnetometer procedures are carried out with the aircraft enginerunning. Start and operate the aircraft engines in accordance with Pilot’s Operating Handbook (POH) orAircraft Flight Manual (AFM).7.2.1.2 Magnetometer CalibrationNOTEThe Pitch/Roll Offset Compensation procedure in section 7.2.1.1 must be completed prior to performingthis procedure.Use a compass rose or calibrated magnetic sight compass to calibrate the magnetometer. Ensure thatthe aircraft and compass are located away from magnetic interference sources including buildings. Theaccuracy of the ADAHRS cannot be guaranteed if the calibration is not performed in an area that is freeof metallic structure or objects.With the aircraft stationary, initiate the magnetometer calibration procedure as follows:1. Start the aircraft engine per the POH/AFM.2. Taxi the aircraft to a desired calibration area.
