EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 184-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
Fault
Cause
Corrective Action
Excessive Heading Lead /
Lag during or after turns
(>7°)
Magnetic Interference
Verify that all steps have been accomplished
to remove magnetic interference (see
section 6.9.4), then contact an Aspen Field
Service Engineer
Autopilot has lateral offset
in GPSS or APPR mode
(HDG Bug may also be out
of center)
Autopilot roll “null”
centering out of adjustment
Follow the autopilot manufacturer’s
guidelines for adjusting roll “null” centering
No VDI or glide slope
display on EFD
a) CRS pointer more than
100° from lubberline.
b) ILS frequency not
selected
a) Rotate CRS pointer to lubberline or
inbound CRS.
b) Select ILS freq on NAV
OBS mode inoperative on
GPS
a) GPS A429 IN bus
configured wrong
a) See Figure 9.27 for GPS configuration
notes
b) ARINC 429 “A” and “B”
lines reversed
b) Correct wiring error to GPS A429 IN bus
Century II/III autopilot
performance poor in all
modes
Value of R1 set incorrectly
Follow the autopilot manufacturer’s
instructions for checking NAV intercept
angle. Larger value for R1 will raise angle
and smaller value of R1 will lower intercept
angle. See Tech Note 2009-06.
