EFD1000 Installation Manual
DOCUMENT # A-01-126-00 PAGE 148-225 Revision H
© Copyright 2009 Aspen Avionics Inc.
• At the completion of the 60 seconds the aircraft will have made at least a 450º
circle (360º + 90º) to approximately two complete circles (720º).
• At the end of the 60 second timer four headings about 90º apart will be
checked against a calibrated heading source (i.e., site compass, compass rose).
• If PFD heading is acceptable then the calibration is Accepted.
• If the PFD heading is not within tolerance then it is Rejected and the calibration
procedure is re-run.
• After the calibration is accepted headings are checked using a calibrated
reference (i.e., a sight compass) every 30º (starting from North) to verify that
the heading accuracy is within ±4º.
• EFD1000 PFD software version 1.1 and subsequent will allow the heading to be
calibrated every 30º.
10.5.1.1 Conventional Gear RSM Calibration Procedure
Perform the RSM calibration procedure per Section 10.5.2 with the tail wheel on the
ground. Verify heading accuracy is within +/- 4º. If the heading accuracy cannot be
brought within +/- 4º tolerance then try temporarily shimming the rear of the RSM up.
Perform another RSM calibration. If a shim corrects the heading accuracy then install
permanent shim per Section 6.9.9.
In some installations it might not be possible to achieve +/- 4º accuracy during the
RSM calibration with the aircraft tail wheel on the ground. If feasible and necessary, the
RSM calibration can be performed in the aircraft flight attitude (with the aircraft tail
wheel lifted off the ground). Contact Aspen Avionics product support for tail dragger
RSM calibration assistance.
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