Users Manual
ALL
EFFECTIVITY
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 6-26
22 Apr 2019
23-15-49
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ASPIRE-400
10 "IRS1"
11 "IRS2".
(2) And clears the fault when anyone of the ARINC 429 labels is received on the same
inactive input bus and considered valid.
NOTE: An ARINC 429 label is considered valid when there is no interface fault for
that particular label.
(3) The SDU records faults for inactive SDU ARINC 429 transmit interfaces reported by
external LRUs.
(4) The SDU records faults for expected ARINC 429 labels that:
(a) Are not present for a period of 3 times the slowest expected period of that label.
(b) Have the SSM set to Not Computed Data (NCD) or Failure Warning (FW) for 3
consecutive samples.
NOTE: The enabled interfaces expected labels may be ORT setting
dependent.
(5) The SDU records Events in this Historical Fault log if Williamsburg protocol errors are
detected on a MCDU interface.
(6) The SDU records events for the state of external Ethernet interfaces.
(7) The ACD records historical security events with:
(a) The MAC address and the IP address of any device which communicates with a
system:
1 The first time that the communications occurs.
2 At least once per day thereafter.
(8) The SDU records faults if no traffic is present on the CEPT-E1 Interface when configured
on.
(9) The SDU records Operational Events related to:
(a) The state of discretes that determine Configuration.
(b) Discrete triggers a Reset.
(10) The ACD records a Security Events when a security discrete changes state.
(11) The SDU records Faults related to discrete states inconsistent with current SDU
configuration.
V. Temperature Monitoring
(1) The SDU records operational faults and events for temperature detection points
including:
(a) ACD Temperature
(b) APP Temperature
(c) Inlet Air Temperature
(d) Outlet Air Temperature
(e) Channel Card Side A Temperature
(f) Channel Card Side B Temperature
DRAFT
3rd rvw Draft as of:
29 January, 2020