L3 FA2100 CVR Component Maintenance Manual With Illustrated Parts List page 81

3. SYSTEM DESCRIPTION
Refer to Figure 2. The Model FA2100 Cockpit Voice Recorder System consists of the re-
corder and an externally mounted control unit or externally mounted preamplifier with re-
mote microphone. Interconnection between the recorder and the control unit is accom-
plished using aircraft wiring. The FA2100 CVR is connected to the aircraft wiring via a
57-pin, DPXB-style connector. The Aircraft Interface PWA provides for all input and out-
put signals.
The Model FA2100CVR is housed in a 1/2-ATR, Short, ARINC 404A-style case. It has an
aluminum chassis cover painted international orange with two reflective stripes located on
a stainless steel or titanium Crash Survivable Memory Unit (CSMU). The recorder weighs
a maximum of 10.6-pounds with an underwater locator device mounted on the front of the
CSMU. The FA2100CVR does not require external shock mounting.
The Model FA2100CVR consists of an Underwater Locating Device, chassis and front
panel, four internal level-2 replaceable assemblies: the Aircraft Interface PWA, Audio
Compressor PWA, Acquisition Processor PWA, and the Crash Survivable Memory Unit
(CSMU) which contains the solid-state flash memory used as the recording medium.
A. Underwater Acoustic Beacon
The Model FA2100 FDR has an underwater acoustic beacon mount located on its front
panel which also acts as the recorders carrying handle. The ULB mount will accept ei-
ther a 30−day or a 90−day underwater locator beacon. The ULB meets or exceeds the
requirements of the Federal Aviation Administration technical standard order TSO-
C121 for 30−day beacons, or TSO−C121b for 90−day beacons.
FAA TSO−C121 will be revoked as of March 1, 2015. After this date, the manufacture of
30−day beacons in accordance with TSO−C121 will be prohibited. 30−day beacons al-
ready in service may still be used, and a kit is available for battery replacement. A
90−day beacon conversion kit is also available for the retrofit of a 90 day beacon to an
existing recorder. All new recorder production will incorporate the 90−day underwater
locator beacon.
The beacon is located on the front panel for ease of reading the battery replacement
date and for quick removal and replacement of the beacon. The ULB is equipped
with a battery that has an expected life of six years. The ULB requires cleaning and
functional testing every 24−months. The batteries in the beacons are field service-
able and and may be ordered from L−3AR.
Use or disclosure of information on this sheet is subject
to the restrictions on the cover page of this document.
The document reference is online, please check the correspondence between the online documentation and the printed version.
AVIATION RECORDERS
COMPONENT MAINTENANCE MANUAL
FA2100CVR
23–70–04
Description and Operation
Rev. 15 Page 4
Apr. 14/16