EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 62-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
For a top external mount the preferred RSM installation area is a minimum of 12 inches
behind a typical baggage or (hat rack) compartment to no closer than 39” from the end of
the fuselage. The “Less Preferred” areas over the cabin should only be selected if
impossible to find an acceptable location within the “Preferred” area of Figure 6-11.
When externally mounted, the NO ZONE areas are hot zones for a lightning strike and are
not to be used for mounting the RSM. The RSM must not be mounted externally to the
wing, the top of the vertical stabilizer, the horizontal stabilizer, the fuselage forward of
the cabin, or within 39” of the tail as measured from the fuselage aft end as shown.
If it is impossible to find a suitable external mounting location in the preferred area, and
internal mounting is not possible, it may be permissible to mount the RSM above the
cabin. A location will need to be found that is a minimum of 18 inches from any small
cabin speakers or electronic device that can cause compass fluctuations. Large cabin
speakers may cause RSM interference at distances up to 3 feet. Use the procedure in
Section 6.9.4 to locate a quiet area. During operation of the electrical systems,
concentrate on those devices that are in the cabin and within the headliner. Be aware
that headsets and other items worn by and operated by the flight crew and passengers
could potentially interfere with the RSM. Typically this would be when the headset is
within 12” of the RSM location. Find a location that cannot be affected by passenger and
flight crew headsets while seated or moving about the cabin.
