Here is some information on the CVR. The pinger is securely fastened to the memory module, and may still be active.
For over 50 years, Honeywell has led the industry in crash survivable recording systems. Honeywell supplies state-of-the-art solid state data, voice and video recorders to support applications in air transport, regional, business jet, military, and helicopter markets.
5.0 SSCVR CRASH PROTECTION DESIGN
The SSCVR's crash survivable memory unit (CSMU) provides for complete data recovery when subjected
to the crash conditions stipulated in ED-56a, and thereby the intent of TSO C-123A :
• Impact Shock 3400G, 6.5 milliseconds
• Penetration Resistance 500 lb. weight from 10 feet
• Static Crush 5000 lbs., 5 minutes
• High Temperature Fire 1100°C, 30 minutes
• Low Temperature Fire 260°C, 10 hours
• Deep Sea Pressure and 20,000 feet, 30 days
• Sea Water/Fluids Immersion Per ED-56a
The CSMU design has been fully qualified to these requirements and, in fact, exceeds them by
considerable margin in key survival areas:
• Impact shock has been successfully demonstrated at 4800 G's
• High temperature fire exposure has been tested to 60 minutes
• Low temperature fire was tested immediately after exposure to 1100°C fire
The superior performance of the CSMU is the result of 30 years experience with designing and producing
protective enclosures. As shown in Figure 6, a very simple package design has been achieved, which not
only contributes to its industry leading survivability characteristics, but also assures a high degree of
maintainability. Compared to competing models, requirements for specialized repair knowledge and
support equipment have been greatly reduced.
Steel Armor
Housing
Housing Liner
Insulation
Upper Module
Thermal Block
FLASH Memory ICs
Memory Board
Access Cover
Steel Armor
Insulation
Cover Liner
Thermal Block
Lower Module
Patent
Protected
Figure 6: CSMU Cutaway View Showing Major Features
The CSMU is easily removed from the top of the SSCVR chassis without having to disassemble the
remainder of the unit. A steel bottom cover provides easy access to the Memory Board. Since the CSMU
uses modular "dry-block" materials for both the insulating liner and thermal mass, there is no need to deal
with the sticky thermal jells or special insulating fluids. The Memory Board design is very simple,
consisting of only a single small circuit card assembly.