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TWA 800

Printed page 3. PDF page 21.

recorded on the other CVR channels without interruption.11 The CVR then recorded a "very loud sound" for a fraction of a second (0.117 second) on all channels immediately before the recording ended. The accident airplane's last recorded radar12 transponder return
Open final report at PDF page 21NTSB AAR-00/03: In-flight breakup, TWA flight 800

TWA 800

Printed page 60. PDF page 78.

breakers were opened. As previously discussed in section 1.1, the CVR recorded an event (a "very loud sound") that was about 40 percent louder than the previous signals during the last few tenths of a second of the CVR recording,
Open final report at PDF page 78NTSB AAR-00/03: In-flight breakup, TWA flight 800

TWA 800

Printed page 61. PDF page 79.

Philippines, on May 11, 1990.120 The CVRs recovered from these airplanes all recorded very loud sound events just before they stopped recording. The sound signatures from these events were compared with the sound signatures recorded at the end of the
Open final report at PDF page 79NTSB AAR-00/03: In-flight breakup, TWA flight 800