EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 183-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
Fault
Cause
Corrective Action
Autopilot or analog
NAV/GPS inoperative
a) ACU chassis not
grounded
a) Ground ACU chassis to airframe ground
b) ACU not powered
b) Check ACU circuit breaker and
power/grounds
c) ACU to sensor wiring
c) Check ACU to sensor wiring
d) ACU to EFD wiring
d) Check ACU to EFD A429 wiring
e) ACU fault
e) Repair or replace ACU
f) EFD fault
f) Repair or replace EFD
“ERRONEOUS CALIBRATION
VALUES” message during
RSM Cal
or
Excessive Heading errors
in one quadrant, or errors
that are higher than actual
in some quadrants and
lower than actual in other
quadrants.
a) RSM is tilted more than
allowed per Section 6 of
this manual
a) Shim RSM to within limits defined in
Section 6 of this manual
b) Poor RSM calibration
b) Re-run RSM calibration at constant rate
turns on flat ground.
c) RSM calibrated too close
to buildings or ferrous
objects
c) Re-run RSM calibration away from
buildings and other ferrous objects
d) Ferrous hardware used to
mount RSM
d) Only non-ferrous screws, nuts, washers
may be used on RSM
e) Airframe or external
magnetic interference
e) Check for magnetized areas on airframe
close to RSM. Verify no ferrous hardware
is near RSM. Degauss magnetized area(s)
Sluggish or Poor AHRS
(ADI) performance
Poor AHRS performance in
steep bank turns
Sluggish compass card
(
Note: may or may not be
associated with “Cross
Check Attitude” message)
a) RSM magnetic
interference
a) Survey RSM location using handheld
compass per Section 6.9.4. Verify there
are no cabin speakers within 3ft of RSM.
Degauss any areas found to be
magnetized or remove magnetism by
other methods.
b) RSM has become
magnetized.
b) With power removed from EFD system
degauss RSM and general area using
degausser.
c)
“Pitch Attitude Trim” or
“Panel Tilt Pitch
Compensation” adjustment
made without performing a
subsequent RSM
Calibration.
c) Perform an RSM Calibration per Section
d)
Pitot and/or Static line
connections at EFD blocked,
kinked, or unplugged.
d) Check pitot/static connections and
plumbing for blockage. Check IAS and
ALT sensor per Section 10.
e) Normal after abrupt
maneuvers.
e) Perform AHRS Reset
