Honeywell ASPIRE-400 System Description, Installation And Maintenance Manual page 79

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
(3) While in "Normal Operation" state the receipt of an ARINC-429 label 143 HPA Command
Word whose "Sign/Status Matrix" field is set to "Functional Test" evokes the execution of
functional test provided the following conditions are satisfied:
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(4) At the completion of functional test the following actions occur:
(a)
EFFECTIVITY
ALL
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ASPIRE-400
The preceding ARINC-429 label 143 HPA Command word received "Sign/Status
Matrix" field was set to "Normal Operation".
The HPA is not actively executing a Off-line self test evoked by ARINC-429 label
143 HPA Command word.
"Functional Test" is identified as a ARINC-429 word SSM reportable condition of
the HPA during the execution of Off-line self-test for the following ARINC-429
words:
1 Label 143 HPA Status word
2 Label 350 HPA Maintenance word
3 Label 357 Detector Data word.
While "Functional Test" persists as the ARINC-429 word reportable condition for
the SSM then GREEN LED function is temporarily overwritten such that the RED
LED and GREEN LED can be illuminated in antiphase, alternating RED then
GREEN.
As a minimum Off-line Self-Test should perform the following tests:
1 CRC verification of integrity of application RAM and supporting software
modules in RAM
2 CRC verification of integrity of application in ROM
3 The integrity of the power supply function
4 Fault evaluation of Temperature sensors
5 ARINC-429 receive communication integrity
6 Invasive ARINC-429 loopback verification
7 The health of the primary function(s).
NOTE: PA functionality is disable prohibiting RF dependent
evaluations and HPA health evaluations.
Off-line self-test should attend to evaluation of all BITE coverage that have
corresponding Fault log capabilities. A cycle of Continuous BIT should be
considered in achieving the coverage objectives
If at the end of Off-line Self-Test any of the following internal fault conditions
persist the HPA is deemed to be in failure:
1 Fault conditions observed in operational RAM
2 Fault conditions observed in software resident ROM
3 Power supply exhibiting secondary power rail voltage faults
4 Power supply current limit exceedance primary or secondary not
attributable to RF Input stimulus.
"Functional Test" is no longer identified as a ARINC-429 word SSM reportable
condition of the HPA
23-15-49
3rd rvw Draft as of:
29 January, 2020
Page 2-15
22 Apr 2019