EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 43-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
5.1.1
Directional Gyro/ HSI
The EFD1000 E5 Flight Display will replace the existing Directional Gyro or HSI in the
panel. If another device is “bootstrapped” from the compass then it will need to be
determined whether RS-232 or LS ARINC 429 heading is accepted by this device and
rewired appropriately. If the other device only accepts ARINC 407 synchro heading or HS
ARINC 429 then an ACU2 will be required.
A magnetic direction indicator is required as a secondary direction indicator per FAR
23.1311(a)(5).
NOTE – If removing an HSI instrument for an airplane approved for IFR, the installer must
verify that no required navigation capability is being lost by its removal.
5.1.2
Aircraft Power Requirements
An electrical load analysis must be performed to ensure the installed EFD1000 E5
components do not exceed the current capacity of the aircraft’s charging system (see
Section 7.1).
The EFD1000 E5 system uses an internal battery to permit operation of the EFD1000 E5
during an aircraft charging system failure. If the aircraft bus voltage falls below a nominal
12.3V (14V electrical system) or 24.6V (28V electrical system), and the indicated airspeed
is above 30 knots or mph (as configured), the EFD1000 E5 will switch to the internal
battery. The installer must ensure that the aircraft electrical system attains the minimum
voltage when the electrical system is loaded to flight configuration and engine RPM is at
or above the level necessary for nominal alternator/generator output.
5.1.3
Equipment Power Requirements
A switch or switch breaker to the EFD must be installed. This switch is used during
emergency procedures, and also enables the EFD to remain off during engine start.
When not using a switch style circuit breaker, each circuit breaker(s) must be a trip free
pull type and must be connected to the main battery bus (after the Battery Master Switch)
as shown in the EFD1000 E5 wiring diagram. Do not connect to the Avionics Bus.
If available, connect the ACU/ACU2 to the avionics electrical bus. Otherwise, connecting
the ACU to the switched battery bus is permissible.
5.1.4
Reserved
