SA Thomas J. Manning to SAC Seattle re emergency locator transmitter signal reported from Portland
Document date 4 December 1971
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Id: Cooper-Part-14:254-254
Subject: Cooper Files: Cooper-Part-14:254-254 Document: Memo SA Thomas J. Manning to SAC Seattle re emergency locator transmitter signal reported from Portland Id: Cooper-Part-14:254-254 Page: https://cooper.theunsolved.net/documents/Cooper-Part-14%3A254-254 What is wrong (title, date, type, which pages belong together, copies)? What does the scan show?
A person reads every report. Corrections are made by hand, to the data — titles, dates, names, which pages belong together — never to the scans, and they can take a while to appear.
FBI 164-81, Vault Part 14 p. 254 (DB Cooper-3621), Memo, dated 4 Dec 1971, serial SE 164-81-826 (as read from the transcript) — cooper.theunsolved.net/documents/Cooper-Part-14%3A254-254
OPTIONAL FORM NO. 10 MAY 1962 EDITION GSA GEN. REG. NO. 27 5010-108-08 UNITED STATES GOVERNMENT Memorandum
TO : SAC, SEATTLE (164-81) (P) DATE: 12/4/71
FROM : SA THOMAS J. MANNING Sub- N
SUBJECT: UNSUB; Northwest Airlines Flight 305 Portland to Seattle 11/24/71 00: Seattle CAA - H IJACKING; EXTORTION
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A re[guess: cent] communication from Portland made reference to an [REDACTED] recently hearing a five minute transmission of emergency sending equipment for distress purposes which all civilian and military aircraft carry. The Portland Division has been asked to continue contacts with National Guard based at Portland International Airport where [REDACTED] for further transmissions of this device.
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Investigation at various airports throughout SW Washington have revealed from technical people familiar with this homing emergency device that frequently this device can be triggered into emitting the emergency signal upon a plane reaching a dive where 5 Gs is reached.
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In view of no positive information of any type concerning the location from which this signal was transmitted (note two locations widely sepearated were mentioned by [REDACTED] no further investigation being conducted by Longview RA.
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(2) TJM/
164-81-826
DB Cooper-3621
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b6 b7C
b6 b7C
Serials: SE 164-81, SE 164-81-826