Users Manual

ALL
EFFECTIVITY
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 2-42
22 Apr 2019
23-15-49
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ASPIRE-400
(9) The ACD resynchronizes its internal time and date to the selected time and date source
when all of the following are true:
(a) The selected time and date has changed
(b) The difference between internal time and date and selected time and date is
greater than 10 seconds.
NOTE: Checking for changing (non-static) data is to accommodate lab
testing when the time label isn’t updating, i.e. labels continuously sent
with same time and date.
(c) The ACD updates the Network Time & Date in NVRAM when any of the following
occurs:
1 Registration with the network
2 Forced deregistration
3 Channel Card reset
4 Satellite handover
5 Manual logoff.
B. Operational Air/Ground Status
(1) Operational Air/Ground Status is used to prohibit or abort ground maintenance
operations when the aircraft is in the air. Examples of applicable ground maintenance
operations are:
(a) Execution of full versus rapid POST
(b) Data Loading
(c) Commanded Self-Test
(d) Execution of PIMBIT.
(2) Operational Air/Ground Status is also sent to the High-Power Amplifier (HPA) and
antenna.
(3) The ACD sets the air/ground status to on ground when:
(a) No valid Secure ORT is present.
(4) The Operational Air/Ground status is calculated as shown in Table 2-7:
Table 2-7. Operational Air/Ground Status
Source Status
Setting
Operational
Air/Ground Status
Primary Installed, per
ORTsetting
WOW equates to aircraft on ground, per ORTsetting On-Ground
Weight-On-
Wheels
(WOW)
WOW doesn’t equates to aircraft on ground, per ORT
setting
In-Air
Not
configured
per ORT
setting, or
invalid
Use Secondary Source
DRAFT
3rd rvw Draft as of:
29 January, 2020