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Swissair 111

Printed page 4. PDF page 16.

OFF 0125:02 14:04 Autopilot 2 disengages, and the flight data recorder (FDR) begins 0125:41 14:24 to record aircraft system failures 0131:18 15:03 Emergency declared 20:40 ATS receives last communication from SR 111 Recorders stop recording Impact with water For a
Open final report at PDF page 16TSB A98H0003: In-flight fire leading to collision with water

Swissair 111

Printed page 73. PDF page 85.

of the CVR recording was 32 minutes, 24 seconds, starting at 0053:17 and stopping at 0125:41. The CVR recorded on four separate tracks: the output of each of the two pilot's audio management units (AMU); the cabin interphone or public
Open final report at PDF page 85TSB A98H0003: In-flight fire leading to collision with water

Swissair 111

Printed page 74. PDF page 86.

stopped because of the loss of electrical power during a 1-second time frame starting at 0125:41, which occurred 5 minutes, 37 seconds, before the aircraft struck the water. Two possibilities were examined to determine why the recorders stopped. The first
Open final report at PDF page 86TSB A98H0003: In-flight fire leading to collision with water

Swissair 111

Printed page 152. PDF page 164.

FACTUAL INFORMATION failures on the approach. When the flight recorders stopped at 0125:41, the aircraft would have been at approximately 700 feet above the runway threshold elevation. The earliest estimated threshold crossing time was 0126:17, which would have been 1
Open final report at PDF page 164TSB A98H0003: In-flight fire leading to collision with water

Swissair 111

Printed page 188. PDF page 200.

recorders and the VHF radios (communications with ATS) stopped functioning at about 0125:41. Near the end of this 92-second period, a reference was made within the cockpit to something burning. It is assessed that the location to which this reference
Open final report at PDF page 200TSB A98H0003: In-flight fire leading to collision with water

Swissair 111

Printed page 192. PDF page 204.

channel, the cabin interphone, and the CVR CAM all continued to record normally until 0125:41.4, when the CVR recording stopped. 192 TRANSPORTATION SAFETY BOARD
Open final report at PDF page 204TSB A98H0003: In-flight fire leading to collision with water