Part 100, page 60

Document date 8 December 1971

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Open in FBI Vault (Part 100, page 60 of the PDF)

FBI 164-81, Vault Part 100 p. 60 (DB Cooper-44973), Memo, dated 8 Dec 1971 — cooper.theunsolved.net/parts/Cooper-Part-100/pages/60

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OPTIONAL FORM NO. 10 MAY 1962 EDITION GSA FPMR (41 CFR) 101-11.6 UNITED STATES GOVERNMENT Memorandum

TO : SAC (164-81)(P) DATE: 12/8/71

FROM : SA [REDACTED] Sub - P. - C. - G.

SUBJECT: UNSUB, aka Dan Cooper; NORTHWEST AIRLINES FLIGHT 305 PORTLAND TO SEATTLE, 11/24/71 RE: Boeing Technical CAA-HIJACKING; Data EXTORTION OO: SE RE: [REDACTED]

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On 12/2/71, [REDACTED], Seattle, Washington, furnished the following information:

He was [REDACTED] testing of this aircraft.

It is physically impossible to make a take-off in the 727 with the rear stairs extended. He explained that if this were attempted the stairs would strike the runway at the point of rotation just prior to liftoff.

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[REDACTED — b3, b6 exemptions applied; substantial block of text withheld]

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[REDACTED — content withheld]

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JCN/djs (3) [initials/signature]

[Stamp area:] [illegible routing number: 162.9:81 - ?] SEARCHED ...... SERIALIZED [illegible] FILED DEC 08 1971 [illegible line]

Buy U.S. Savings Bonds Regularly on the Payroll Savings Plan DB COOPER-44973

AI notes

Commentary by the AI model that transcribed this page. It may bring in context the page itself does not state. The scan is the source; the transcript is machine-generated from it.

Standard U.S. Government Memorandum header. Addressed to the Special Agent in Charge (SAC) under case number 164-81(P), dated December 8, 1971. From a redacted Special Agent. Subject is the UNSUB known as Dan Cooper, relating to the Northwest Airlines Flight 305 hijacking/extortion from Portland to Seattle on 11/24/71. The memo concerns Boeing Technical Data. A handwritten notation reads 'Sub - P. - C. - G.' Privacy exemptions b6 and b7C applied to sender identity. On December 2, 1971, a redacted individual in Seattle, Washington provided information about the Boeing 727. The source was involved in [redacted] testing of the aircraft. The key technical finding is that it is physically impossible for a Boeing 727 to take off with its rear stairs extended, because the stairs would strike the runway at the point of rotation just before liftoff. This is relevant to the D.B. Cooper hijacking, in which Cooper jumped from the rear stairs of NW Flight 305. Large redacted block. Exemptions b3 (statutory) and b6 (personal privacy) cited. Content unknown. Second smaller redacted block near bottom of main body. Content unknown. Bottom of memo contains typist initials (JCN/djs), distribution copies notation (3), a routing/serialization stamp dated December 8, 1971, and the standard government savings bond footer. Document identifier is DB COOPER-44973. Privacy exemptions b3 and b7E apply to portions of the stamp area.

Main text is clearly legible
Multiple redacted blocks obscure names, source identity, and additional content
Two large mid-page redacted blocks (b3/b6 exemptions) remove substantial content
Handwritten notation partially legible
Bottom stamp area partially legible

Part 100, page 60

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