ReportSeattle NORJAK report: pressure-bump test flight and determination of jump point30 May 1973page 2 of 2
reportLegibility: medium

Part 60, page 311

DB Cooper-24996Serials SE 164-81

Document date 30 May 1973

Open in FBI Vault (Part 60, page 311 of the PDF)

FBI 164-81, Vault Part 60 p. 311 (DB Cooper-24996), Report, dated 30 May 1973 — cooper.theunsolved.net/parts/Cooper-Part-60/pages/311

Transcript

The scan is the source; the transcript is machine-generated from it.

SE 164-81

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On 1/6/72, the NWA 727 which was actually involved in the hijacking, was flown to Seattle, by [REDACTED] b6 for the purpose of conducting a test to see if the "pressure b7C bump" experienced during the hijacking, was caused by some- thing leaving the aircraft.

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The conclusion from that test was that the cabin pressure change occurred when the stairs were forced upward by the air pressure after the weight had been removed. according to [REDACTED] who was a member of b6 the hijacked crew, and also a member of the crew when b7C the test was performed, the occurrence was identical with the incident on the night of the hijack. Also the instrument in the cabin which reacted so violently on the night of the hijacking, also reacted the same way when the test was performed.

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[REDACTED] based on the test flight above, b6 then prepared a memo showing the steps by which he arrived b7C at the best probable bail out point of the hijacker, and plotted this area on a map. This information is set forth as follows:

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[illegible - appears to be a faint map or diagram with scattered dots and markings]

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DB Cooper-24996