EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 161-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
HDG ADJ field will display the amount of correction (+/- 6.0 degrees) that was required.
Press the HDG ADJ line select key to accept the setting.
Figure 10-18: Calibrated Heading After Adjustment
Now repeat the process above for all other headings in 30º increments from 60º to 360º.
Press the MENU key to exit the Installation Menu. Continue with heading accuracy tests in
Section 10.5.4.
NOTE: In some aircraft, prop wash and wind during ground operations can create inconsistent
pressures in the pitot-static system. The pressures can affect the ADAHRS, resulting in
small pitch and heading perturbations. Before reading the aircraft headings for the
purposes of calibration, ensure the attitude solution has stabilized and is not influenced by
external winds and pressures. The disturbances normally settle out over a period of 15 to
60 seconds. Idle power or temporarily selecting the alternate static source can sometimes
eliminate the effect.
10.5.4
Heading Accuracy Test
As a final check, position the aircraft on the headings shown on “Installation Final Check
Sheet” of Appendix B and verify heading (viewed on compass card) is /- 4
degrees using a calibrated heading source (i.e., sight compass, compass rose). Record
the actual EFD headings in the table for inclusion in the aircraft maintenance records.
If any heading is outside ±4º then rerun the Calibration Procedure and or Heading Offset
adjustment.
10.5.5
Heading Interference Test
With aircraft engine(s) running monitor current aircraft heading on EFD and exercise
flight controls stop to stop including flaps and any electric trim tabs. Verify the heading
(viewed on compass card) does not change on the EFD by more than 2º. If movement of
flight controls causes more than a 2º heading change then it may be necessary to
degauss the flight controls including the cables. A handheld degausser can be found at
most audio and video stores.
Operate all electrical and environmental equipment including:
Blowers, fans, heaters, air conditioner
Deice boots, fuel pump(s), backup vacuum pumps
Landing, logo, NAV lighting
Operate pulse equipment – transponder, WX radar, DME
Key all VHF communication radios.
Operate autopilot so that all servos run (roll, pitch, yaw, trim)
If the operation of any electrical system causes the heading to change by more than 2º
the RSM wiring may need to be relocated away from the offending system. The
MAGNETOMETER CALIBRATION
CAL HDG: 030.0º
