L3 FA2100 CVR Component Maintenance Manual With Illustrated Parts List page 241

B. Crash Survivable Memory Unit (CSMU) Removal
(See Figure 305 or IPL Figure 1, Item 185)
The Model FA2100CVRs CSMU is mounted to the top of the recorder chassis by (4)
pan-head sealing screws (MOD−DOT 4). It interfaces to the Acquisition Processor
PWA through the Memory Interface Cable assembly attached to the Acquisition
Processor PWA's J1 connector. The CSMU is a sealed unit and must be returned to
the factory for repair. If replacement of the CSMU is required, proceed with the fol-
lowing procedure:
CSMU REMOVAL PROCEDURE
(1) Remove the Underwater Acoustic Beacon (1-80) as described in
paragraph A. above.
(2) Remove the four 1/4–20, 1" pan−head sealing screws (190) that secure the
CSMU memory assembly (1-185) to the recorder chassis (1-5).
(a)
NOTE:
Recorder
Chassis
(1‐5)
Figure 302. CSMU Memory Sealing Screw Removal
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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
For Pre-MOD DOT 13 units only, carefully remove the RTV from around
the memory interface cable assembly slot in the chassis.
Pan-head sealing screws (1-190) are one time use items
that should be discarded when removed and replaced with
new screws.
1/4" Pan−Head Sealing
Screws (190)
(Qty. 4)
CSMU
Memory Assembly
(1‐185)
23–70–04
Rev. 15 Page 304
Disassembly
Apr. 14/16