EFD1000 Installation Manual
DOCUMENT # A-01-126-00 PAGE 222-225 Revision H
© Copyright 2009 Aspen Avionics Inc.
Perform post installation tests in Sections 10.6.6, 10.6.7, 10.6.9, 10.6.10.
RSM Removal
Verify power is off. It will be necessary to gain access to the underside of the RSM mounting
location in order to unplug the RSM connector. Unscrew RSM electrical connector from
inside and undo shield ground wire from ground stud. Remove sealant from around base
of RSM and on mounting screws. Remove four (4) 8-32 non-ferrous mounting screws from
RSM and remove RSM from aircraft taking care to guide 24 inch “pigtail” connector out
through ½ inch hole in aircraft skin.
RSM Replacement
Verify power is off. Verify O-ring on RSM is in good condition with no cracking or
flattening. Contact Aspen Avionics for replacement O-ring if required. Verify RSM shim is
installed between aircraft skin and RSM if required. Feed circular connector down through ½
inch hole in aircraft skin and mount RSM (vent hole faces aft) with four (4) 8-32 non-
ferrous screws. It is critical that the screws be non-ferrous to prevent the introduction of
compass errors. Connect electrical connector from inside and cable tie connector and
harness to prevent interference with flight controls as per AC43.13. Connect shield ground
wire to ground stud. Re-seal around base and on top of four mounting screws of RSM
using one of the following non-corrosive sealants:
Non-pressure vessel mounting Dow Corning 738, MIL-A-46146 or equiv.
Pressure vessel mounting Pro-Seal PS 870B-1/2, MIL-PRF-81733D,
or equiv.
Perform RSM Calibration per Section 10.5 of this manual. Also check OAT operation per
Section 10.6.4 and check RSM GPS operation per Section 10.6.6.
CM Removal
Verify power is off. Cut the two (2) cable ties affixing the CMU to the PFD wiring harness.
Unplug the Molex connector by pressing down on the locking tab and gently pulling the
connector from the module.
CM Replacement
Verify power is off. Plug the Molex connector into the module until it clicks. Cable tie the
module to the PFD wiring harness being careful to prevent interference with flight controls
per AC43.13.
Perform the post-installation unit configuration per section 10.4.5 of this manual.
Perform RSM Calibration per Section 10.5 of this manual.
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