Aspen Avionics EFD1000 - Page 205

EFD1000 Installation Manual
DOCUMENT # A-01-126-00 PAGE 205-225 Revision H
© Copyright 2009 Aspen Avionics Inc.
System Troubleshooting – continued
Fault Cause Corrective Action
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
b) Poor RSM calibration
c) RSM calibrated too close to
buildings or ferrous objects
d) Ferrous hardware used to
mount RSM
e) Airframe or external
magnetic interference
a) Shim RSM to within limits defined in
Section 6 of this manual
b) Re-run RSM calibration at constant
rate turns.
c) Re-run RSM calibration away from
buildings and other ferrous objects
d) Only non-magnetic screws, nuts,
washers may be used on RSM
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
b) RSM has become
magnetized.
c) “Pitch Attitude Trim”
adjustment made without
performing a subsequent RSM
Calibration.
d) Pitot and/or Static line
connections at PFD blocked,
kinked, or unplugged.
e) Normal after abrupt
maneuvers.
a) Survey RSM location using handheld
compass per Section 6.9.1. Verify there
are no cabin speakers within 3ft of RSM.
Degauss any areas found to be
magnetized or remove magnetism by
other methods.
b) With power removed from EFD1000
system degauss RSM and general area
using degausser.
c) Perform an RSM Calibration per
Section 10.5.2
d) Check pitot/static connections and
plumbing for blockage. Check IAS and
ALT sensor per Section 10.
e) Perform AHRS Reset
Excessive Heading Leading
during turns (>7°)
Magnetic Interference
Verify that all steps have been
accomplished to remove magnetic
interference (see §6.9.1), then
contact an Aspen Field Service
Engineer
Autopilot has lateral offset in
GPSS or APPR mode
(HDG Bug may also be out of
center)
a) Autopilot roll “null”
centering out of adjustment
a) Follow the autopilot manufacturers’
guidelines for adjusting roll “null”
centering
Century II/III autopilot
performance poor in all modes
a) Value of R1 set incorrectly a) Follow the autopilot manufacturers’
instructions for checking NAV intercept
angle. Larger value for R1 will raise
angle and smaller value of R1 will lower
intercept angle.