Users Manual

ALL
EFFECTIVITY
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 7-11
22 Apr 2019
23-15-49
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ASPIRE-400
(5) After event is detected in the AES.
I. Counters and Timers
(1) Certain counters and timers relating to power application to the SDU are maintained to
provide operational context when troubleshooting failure or usage issues. These
counters and timers are:
(a) Stored in the Historical Logs
(b) Viewable from the Web GUI.
(2) The ACD processor stores in non-volatile memory the number of times the equipment
initiates application code from boot code.
(3) The ACD processor accumulates and stores in non-volatile memory, the total
accumulated time the equipment has been powered.
(4) The ACD Processor maintains the time since the equipment was powered on/reset.
3. Aircraft Fault Reporting
A. CFDS Reporting
(1) The SDU handles reporting of external system connectivity faults to the Central Fault and
Display System (CFDS) as follows:
(a) inhibit reporting for 1 minute after power-on
(b) provide reporting no later than 2 minutes after power-on.
(2) The SDU handles reporting of SATCOM LRU connectivity faults to the CFDS as follows:
(a) inhibit reporting for 2 minutes after power-on
(b) provide reporting no later than 3 minutes after power-on.
(3) The ACD reports continuously monitored internal and interface faults to the CFDS within
2s following detection.
(4) When a latched fault is detected during self-test, the ACD latches the corresponding fault
report bits in the failed state until another self-test is performed.
(5) When a continuously monitored fault is detected, the ACD asserts and hold the
appropriate indication to the CFDS for a minimum of 6 seconds.
(6) Status and fault information received from the external power amplifier and Antenna
subsystem is mapped to appropriate bits in the transmitted CFDS Fault Summary Word
labels.
B. CMU Fault Reporting
(1) The ACD annunciates any flight deck effect(s) to CMU via bits 11-13, 19-21, 28, 29 of
label 270:
(a) Within 2 seconds following the confirmation of a fault and;
(b) Hold the indication for a minimum of 6 seconds.
(2) The SDU sets bit 12 to inactive (1) in label 270 SDU to ACARS MU/CMU Status Word to
the CMU for the following condition:
(a) When Label 270 on "Data from CMU 1" is either:
1 Missing for 3.3 seconds.
DRAFT
3rd rvw Draft as of:
29 January, 2020