EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 70-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
6.9.8
RSM External Mount – Aluminum Skin
This STC approves the use of the doubler shown in Figure 6-19 for Aluminum Skinned
aircraft only. Mounting the RSM externally to a composite or fabric aircraft is not
approved by this STC and will require that the installer obtain separate approval of the
RSM mounting on these classes of aircraft. After the RSM mounting has been approved,
this STC may be subsequently installed.
The doubler may be purchased from Aspen under P/N 503-00015-001 or may be
installer fabricated using the dimensions and rivet holes as shown. Should the installer
wish to deviate from this doubler in size, rivet count, rivet spacing, or doubler thickness,
they are required to seek separate approval.
6.9.8.1
RSM Doubler Fabrication
1)
Determine the thickness of the aircraft skin.
2)
For aircraft skins 0.050” thick and less the doubler should be made from 0.050”
material or optionally Aspen P/N 503-00015-001 doubler may be used. For
aircraft skins thicker than 0.050 the doubler should be made from material the
same thickness as the aircraft skin.
3)
Fabricate the doubler from 2024-T3 AMS-QQ-A-250/5 to the dimensions in
Figure 6-19, Tolerances ± 0.030.
Figure 6-19: RSM Doubler P/N 503-00015-001
NOTE: The tab for the RSM shield ground lug connection may be bent as shown or the entire forward
edge may be extended and bent down as a tab.
4)
Remove burrs and break sharp edges (0.005” – 0.015”).
5)
Finish with Alumiprep Etch and Alodine Conversion Coating.
