L3 Communications FA2100 - Applicable Documents; Fa2100 Cvr Specifications

COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
FA2100CVR
Page 21
Nov. 01/98
Description and Operation
23–70–04
The SMP checks the non−volatile random access memory (NVRAM) for operation
and data integrity using a cyclic redundancy check (CRC) on the contents. A failure
to read or write this device properly will be flagged by a CRC mismatch and a BIT
fault will be asserted.
Finally, the SMP verifies the function of the crash−survivable memory unit (CSMU)
by performing a read after each write to ensure the data written to CSMU can be re-
trieved.
In summary each processor, RAM and programmable memory device in the FA2100
is monitored by BIT. They are checked at power−up and continuously monitored
during operation of the recorder. Failures are reported using the FAULT output sig-
nals.
4. FA2100 CVR SPECIFICATIONS
Specifications for the Model FA2100CVR have been developed in close coordination with
Aerospace Industry regulatory agencies. As such, the FA2100CVR meets or exceeds the
requirements of technical standard order TSO–C123a, TSO–C123b, EUROCAE ED–55,
EUROCAE ED–56A, and EUROCAE ED−112.
A. Applicable Documents
The following documents form a part of, or are referenced, within this CMM:
(1) TSO–C123a Federal Aviation Agency
Technical Standard Order TSO–C123a Techni-
cal Standard Order for Cockpit Voice
Recorder Systems.
(1) TSO–C123b Federal Aviation Agency
Technical Standard Order TSO–C123b Techni-
cal Standard Order for Cockpit Voice
Recorder Equipment.
(2) EUROCAE MOPS ED–55 European Organization for Civil Aviation
Electronics Minimum Operational Performance
Specification for Flight Data Recorder Systems
(3) EUROCAE MOPS ED–56A European Organization for Civil Aviation
Electronics Minimum Operational Performance
Specification for CVR Systems, December
1993
(4) EUROCAE MOPS ED–112 European Organization for Civil Aviation
Electronics Minimum Operational Performance
Specification for Crash Protected Airborne Re-
corder Systems, March 2003
(5) ARINC 404A Air Transport Equipment Cases and Racking
Characteristic
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