EFD1000 Installation Manual
DOCUMENT # A-01-126-00 PAGE 46-225 Revision H
© Copyright 2009 Aspen Avionics Inc.
6.5 Installation Limitations
The following mounting limitations must not be exceeded during the installation of the PFD
and RSM:
• The PFD must be mounted within ±8º of perpendicular to the aircraft waterline.
• The PFD must be mounted within 0.0±0.1º of the zero degree roll “wings level” axis.
• The RSM must be mounted within ±4º to the longitudinal axis of the aircraft (Fig. 6.8)
• The RSM must be mounted within ±10º of the 0º roll “wings level” axis (Fig. 6.10)
• The RSM must be mounted within ±10º to the zero pitch axis “waterline” of the
airframe (see Fig. 6.9). In no case may the PFD to RSM difference be greater than 18º
(8º of PFD tilt plus 10º of RSM tilt).
• RSM must be mounted to a relatively flat surface to prevent deformation of the aircraft
skin and must not allow more than a .030” gap between RSM and skin.
• RSM must not be mounted to a NO ZONE as pictured in Figure 6.7.
• Mounting the RSM to, or making penetrations through, the aircraft pressure vessel is
beyond the scope of this STC. Separate FAA approval of pressure vessel penetrations
required to accommodate RSM mounting is required prior to the installation of the
remaining EFD1000 system components under the EFD1000 AML-STC.
• Mounting the RSM to a composite or fabric skinned aircraft is beyond the scope of this
STC. Separate FAA approval of the RSM mounting is required for these aircraft.
6.6 Equipment Bonding
All metal components must be grounded and bonded to the airframe with less than 3
milliohms resistance in accordance with FAR 23.867(a).
The PFD uses an installer fabricated braided bonding strap to ensure proper bonding to the
panel. The bond strap is attached with supplied screw (3/8
th
inch length) to back of PFD at
location just below and left of static port. The other end of strap is attached to PFD mounting
bracket screw at the backside of the panel.
The RSM does not require an RF ground plane, but it must be bonded to the airframe to meet
compliance with DO-160E EMI and Lightning certification requirements. The attached ground
wire on the RSM is not a bonding wire but is a shield ground for the pigtail over braid and
must be connected to airframe ground.
The ACU is bonded through its six (6) mounting holes and chassis when mounted to a metal
surface, otherwise a braided or single stranded wire bonding strap to airframe ground will
need to be fabricated for mounting on composite structures.
6.7 Cooling
The PFD contains an integral fan. The area near the fan must be unobstructed. Cooling air
improves heat dissipation and can improve equipment reliability. The RSM, ACU, and
Configuration Module have no cooling requirements.
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