SAC Seattle to Acting Director FBI re NORJAK proposed solution submitted by correspondent
Document date 20 June 1973
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Id: Cooper-Part-32:002-004
Subject: Cooper Files: Cooper-Part-32:002-004 Document: Airtel SAC Seattle to Acting Director FBI re NORJAK proposed solution submitted by correspondent Id: Cooper-Part-32:002-004 Page: https://cooper.theunsolved.net/documents/Cooper-Part-32%3A002-004 What is wrong (title, date, type, which pages belong together, copies)? What does the scan show?
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FBI 164-81, Vault Part 32 pp. 2–4 (DB Cooper-11598–11599), Airtel, dated 20 Jun 1973, serial SE 164-81-Y807 (as read from the transcript) — cooper.theunsolved.net/documents/Cooper-Part-32%3A002-004
6/20/73
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AIRTEL AIRMAIL
TO: ACTING DIRECTOR, FBI (164-2111) FROM: SAC, SEATTLE (164-31) (P) SUBJECT: NORJAK OO: SEATTLE
Re Bureau letter to Seattle, dated 6/8/73.
Referenced communication enclosed a letter from [REDACTED] who has offered two possible solu- tions to captioned matter. Seattle Division's comments to the feasibility and plausibility of these solutions were requested by the Bureau.
[REDACTED] One of the solutions was described by [REDACTED] as follows:
[REDACTED - large block]
This is not plausible because the point at which the hijacker left the aircraft was determined by time correlation of a tape recording of the comments of the crew during a "pressure oscillation." This oscilla- tion was later determined to be caused by outside air pressure forcing closed the air stairs, thereby causing an increase in air pressure inside the plane, similar to shutting a car door with the windows up. This
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2 - Bureau 2 - Minneapolis (164-73) (2)- Seattle RMN:kn (6)
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Searched Serialized Indexed [illegible]
164- 81- Y807
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b6 b7C b7D
SE 164-81
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phenomena of "pressure oscillation" was unknown to the crew or anyone else, prior to a test conducted by FBI, U. S. Air Force and Northwest Orient Airlines personnel on January 6, 1972.
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The final solution was proposed by [REDACTED] as follows:
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[REDACTED — large blocked-out area]
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In order for this solution to have any credibility at all, it is necessary to make the following assumptions:
(1) If it was a crewmember, he would be known to stewardesses and the ticket agent;
(2) There would have to have been at least seven persons involved (i.e. pilot, 2nd officer, 3rd officer, 3 stewardesses and a ticket agent or an accomplice);
(3) No passengers were involved.
Under these assumptions, this solution is not plausible because of the following reasons:
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DB Cooper-11598
SE 164-81
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(1) All of the descriptions of UNSUB supplied by crew and passengers agreed for the most part, and no indication of UNSUB wearing a disguise (i.e., wig, makeup) was given.
(2) All of the statements by crew and passengers agreed for the most part as to what took place during the hijack. A conspiracy involving seven or more persons would probably have some discrepancies as to story content.
(3) The crew described a pressure oscillation which occurred at 8:11 PM on November 24, 1971. The fact that an oscillation would occur when someone parachuted from the rear air stairs was not known until January 6, 1972 (see above).
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On June 19, 1973, [REDACTED] Official of Northwest Orient Airlines, furnished the following descriptions of two of the three NORJAK crew members:
[REDACTED]
[REDACTED]
[REDACTED]
[REDACTED]
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Since the description of the [REDACTED] [REDACTED] was not determined, the following lead is set forth on a UACB basis:
LEAD
MINNEAPOLIS At Minneapolis, Minnesota
Will discreetly determine [REDACTED] description and set out leads to have other appropriate investigation conducted necessary to determine if [REDACTED] could have posed as UNSUB.
ARMED AND DANGEROUS
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DB Cooper-11599
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Serials: 164-2111, 164-31, MP 164-73, SE 164-81, SE 164-81-Y807
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