EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 154-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
With engines running, all electrical equipment operating, and the aircraft stationary
the RSM CAL page will be entered and Start Calibration will be initiated (see Figure
10-11).
After a 15 second countdown timer the pilot/operator will begin to taxi the aircraft in
a circle (cw or ccw) with the radius of approximately twice the length of the aircraft’s
wing as viewed from the cockpit (≈ 30ft).
The aircraft will be taxied under its own power at a constant rate around a circle until
a 60 second timer elapses. The aircraft must not stop until the timer has exhausted.
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 EFD heading is acceptable then the calibration is Accepted.
If the EFD 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.
10.5.1.1
Second Phase RSM Location Evaluation
As a second check against potentially damaging magnetic interference near the RSM it
is required that the following test be run. The handheld compass test in section 6
usually does an acceptable job of locating a magnetically quiet area for mounting a
RSM but does not take out all the factors such as ferrous RSM mounting hardware and
an RSM that may have come in contact with a magnet due to poor handling and
mounting practices. Follow the instructions below to fill in Table 10-3.
STEP
Example
Actual
Vertical Component (Z) from NOAA (nT)
40,422.2nT
(Los Angeles)
Vertical Component (Z) from NOAA converted by
moving the decimal 5 places to left
.40
Z1
Vertical Component (Z) from EFD1000
(RSM level within 5 degrees)
.37
Z2
Vertical Component (Z) Average of North and South
reading (RSM tilted more than 5 degrees)
Not required as RSM
was within 5⁰
Z2
Add 0.1 to the Z1 box above
.40 + .1 = .50
Z3
Subtract 0.1 from the Z1 box above
.40 - .1 = .30
Z4
Does Z2 lie in between the Z3 and Z4 number?
Yes
Table 10-2: Vertical Component Evaluation table