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89000046-014
KSN 780/8XX/900 AeroNav AML STC Installation Manual for Helicopters
Rev 0
Page-4-4
© Honeywell International Inc. Do not copy without express permission of Honeywell.
If installing a 3rd party NAV and/or COM and AeroNav XXX, connect the AeroNav XXX as shown in
Avionics Bus 2
Other COM/NAV
Aircraft Ground
Avionics Bus 1
AeroNav 800/900
COM
Aircraft Ground
Avionics Bus
Other COM/NAV
Aircraft Ground
Main Bus
AeroNav 800/900
COM
Aircraft Ground
Preferred
Alternate
Figure 5 Dual NAV/COM Aircraft Bus Installation
The installer is responsible for preservation of multiple power busses on the aircraft in accordance
with manufacturer's original design and the requirements of 14 CFR Part 27. This includes maintaining
electrical power to essential equipment.
4.10 Electrical Load Analysis
Prior to installing the AeroNav XXX, an electrical load analysis (ELA) must be performed. The aircraft’s
electrical load should be less than 80% of the total generator output following the AeroNav XXX
installation, reference Section 1.5 for AeroNav XXX power requirements. Also reference FAA AC
43.13-2B Paragraph 208 for more information on performing an aircraft electrical load analysis.
The purpose of the ELA is to show compliance to 14 CFR §27.1351 and §27.1353 (h).
4.11 Low Power Behaviors
The AeroNav XXX can accept input power ranging from 9VDC to 33VDC but has the following low
power behaviors.
Functions are restored if the AeroNav input voltage rises 1VDC above threshold voltage for 1 second.
Input Voltage Level
Behavior
19.9VDC
16W VHF radio output power reduces to 10W *
≥
18VDC
High power USB charging (dedicated charging port drawing 2.1A).
<
18VDC
USB port drops from High power USB charging to Low power USB charging
(dedicated charging port drawing 1.0A).
12.75VDC
USB port is turned off (no charging available).
11.5VDC
Bezel and LCD display dimmed down to 25% and a yellow “Low Volts” CAS
message is presented.
10.9VDC
VHF radio output power reduces to 6W *
10.0VDC
VHF radio output power reduces to 4W *
9VDC
Start a 60 second power down sequence and a red “Low Volts Off in <x>
sec” CAS message is presented. With 5 seconds to go until power down, the
full power down message is overlaid in the middle of the display.
*N/A for AeroNav 880/780
Table 36 AeroNav XXX Low Power Behavior
Содержание 700-00179-700
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