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Swissair 111

Printed page 256. PDF page 268.

stopped recording at almost the same time because of fire-related power interruptions; independent sources of aircraft power for the recorders may have allowed more information to be recorded. 15. Regulations did not require the CVR to have a source of
Open final report at PDF page 268TSB A98H0003: In-flight fire leading to collision with water

Swissair 111

Printed page 75. PDF page 87.

for about 5.5 minutes with no information being recorded. Modern, maintenance-free, independent power sources and new-technology CVRs make it feasible to provide independent CVR and CAM power for at least several minutes. This would allow the continued recording of the
Open final report at PDF page 87TSB A98H0003: In-flight fire leading to collision with water

Swissair 111

Printed page 264. PDF page 276.

SAFETY ACTION With maintenance-free independent power sources, it is now feasible to power new-technology CVRs and the cockpit area microphone (CAM) independently of normal aircraft power for a specific period of time in
Open final report at PDF page 276TSB A98H0003: In-flight fire leading to collision with water