COMPONENT MAINTENANCE MANUAL
AVIATION PRODUCTS
Model FA5000
Rev. 02 Page 46
July 21/17
Description and Operation
23–70−30
Use or disclosure of information on this sheet is subject to
the restrictions on the cover page of this document.
If the RIPS is not present, then any reference to RIPS in the Interactive OMS
output pages will be suppressed. However, in the case where the CVR is re-
moved from an aircraft with RIPS and re−installed on an aircraft without RIPS, it
is possible that previous flight leg RIPS fault information, stored in the CVR
fault log while installed on the aircraft with RIPS, will be displayed. This is not
considered a likely event since when a CVR is removed from an aircraft it is re-
quired to pass a ”return to service” test performed on a repair bench, before re−
installation. This procedure usually includes clearing the fault log that may
have had RIPS faults recorded.
This RIPS Present status will be received and transmitted in the Label 350, La-
bel 351, and new Label 352 outputs as follows:
RIPS Presence
Status
CVR Discrete in-
put (Pin 42)
SSCVR Label 350
and 352 (Bit 22)
SSCVR Label 351
(Bit 20)
Not present Open 0 1
Present Ground 1 0
For more information on the RIPS, see P/N:165E4900−00, Installation and Op-
eration Instruction Manual for Recorder Independent Power Supply (RIPS).
9. Onboard Maintenance System Interface
The FA5000CVR includes an ARINC 429, high speed, Onboard Maintenance Sys-
tem (OMS) output interface (Pins 50/51) and an ARINC 429, low speed, OMS input
interface (Pins 39/40). The OMS input interface is only used for OMS heartbeat de-
tection and is discussed further in section 1.4 below.
The OMS output interface is used for transmission of CVR status information to a
Centralized Maintenance Computer (CMC). The OMS outputs are listed in Table
1.1.
Table 4. CVR OMS Output Words
Label Parameter Format Rate
350 CVR Status Word BNR 1 s
354 LRU identification (P/N and S/N) ISO 5 0.5 s
377 ARINC 429 equipment identification BCD 1 s
The Label 350 status word can be used to supplement or replace the discrete status
outputs that are otherwise available from the CVR (e.g. CVR Fault discrete, DataLink
Fault Discrete, and Test Good Indicator). The CVR software provides the Label 350
status output word, per ARINC 757/A, once per second.
The document reference is online, please check the correspondence between the online documentation and the printed version.
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