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EFFECTIVITY
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 2-44
22 Apr 2019
23-15-49
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ASPIRE-400
(2) Based on the ORT, the ACD retrieves and set the ICAO from one of:
(a) AES ID Input (Labels 275 & 276)
(b) CMU (Labels 214 & 216) and enable the associated labels on the identified
interface.
(3) The first two valid and matching ICAO address labels received after power up on the
ground is stored in non-volatile memory and used until the next on-ground power up.
NOTE: If present, the stored ICAO is used after in-air power ups.
(4) The SDU considers any of the following ICAO addresses invalid:
(a) All zeros (0b)
(b) All ones (1b)
(c) ARINC 429 ICAO words with parity errors.
NOTE: The SSM field has intentionally not been included in the validity
criteria. Thus, ICAO information can be processed from ARINC 429
labels with SSM other than Normal Operation.
3rd rvw Draft as of:
29 January, 2020
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