SAC Minneapolis to Director, Portland and Seattle re flight path and jump point computations

FD-36 (Rev. 5-22-64)

FBI

Date: 11/26/71

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Via __TELETYPE__ URGENT (Priority)

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TO: DIRECTOR, FBI SACS, PORTLAND SEATTLE

FROM: SAC, MINNEAPOLIS (164-NEW)

UNSUB; NORTHWEST FLIGHT THREE ZERO FIVE, NOVEMBER TWO FIVE, NINETEEN SEVEN ONE, CAA DASH HIJACKING; EXTORTION.

RE MINNEAPOLIS TELETYPES TO DIRECTOR AND SACS NOVEMBER TWO FIVE, LAST, AND MINNEAPOLIS TELEPHONE CALLS TO SEATTLE AND PORTLAND, NOVEMBER TWO FIVE, LAST.

[REDACTED] NORTHWEST b6 b7C AIRLINES, BASED ON REVIEW OF NOTES MAINTAINED WHILE IN COMMUNICATION WITH HIJACKED AIRCRAFT FLIGHT THREE ZERO FIVE, PLUS MATHEMATICAL COMPUTATION, ADVISES POSSIBLE AREA OF LANDING OF HIJACKER COULD BE EITHER SIDE OF A LINE BETWEEN TWO POINTS: THE FIRST POINT BEING APPROXIMATELY TWO MILES SOUTH SOUTHWEST OF THE FACE OF THE DAM ON LAKE MERWIN, WASHINGTON; WITH THE SECOND POINT BEING A POINT ONE MILE

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(1)- Minneapolis [guess: Searched] ________ |b4·73·[guess: 6]| TES:wkb [guess: m] /[guess: s/]. [guess: and] [guess: sd] (1) [guess: Per/da] Sent [guess: 4/] 7 AM Per ___ DB Cooper-33761 Approved: __________ Special Agent in Charge // :5[guess: 49] GOVERNMENT PRINTING OFFICE: 1971-413-135 10:05P [guess: M CC?]

FD-36 (Rev. 5-22-64)

F B I

Date:

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MP 164-NEW

PAGE TWO

NORTH NORTHWEST OF HEISSON, WASHINGTON. THESE COMPUTATIONS WERE ARRIVED AT BASED ON THE ALTITUDE, DIRECTION AND SPEED OF THE AIRCRAFT WHICH WAS THEN FLYING VECTOR BETWEEN SEATTLE AND PORTLAND WHEN A PRESSURE BUMP AND OSCELATION OF THE AIRCRAFT WAS NOTED BY THE CREW. TO THOSE FAMILIAR WITH THE AIRCRAFT, IT WOULD INDICATE THE REAR DOOR WAS OPENED, CAUSING THE PRESSURE TO DROP AND WOULD BE A VERY LIKELY TIME FOR UNSUB'S DEPARTURE FROM THE AIRCRAFT.

HIS NOTES INDICATE THAT AT MINNEAPOLIS TIME TWENTY ONE FORTY ONE A STEWARDESS WAS ORDERED TO THE COCKPIT BY THE HIJACKER. AT TWENTY ONE FORTY TWO THE HIJACKER ADVISED BY INTER-PHONE THAT HE WAS HAVING DIFFICULTY GETTING STEPS DOWN. AT TWENTY TWO ZERO FIVE THE COCKPIT WAS IN COMMUNICATION WITH THE HIJACKER, AND AT TWENTY TWO TEN THE PRESSURE BUMP AND OSCELATION OCCURRED. NO FURTHER COMMUNICATION WAS HAD WITH THE UNSUB SUBSEQUENT TO THIS TIME.

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Approved: _______________ Sent ___________ M Per _______________ Special Agent in Charge ☆ U.S. GOVERNMENT PRINTING OFFICE: 1971-413-135

DB Cooper-33762

FD-36 (Rev. 5-22-64)

FBI

Date:

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MP 164-NEW

PAGE THREE

[REDACTED] WAS INFORMED BY [REDACTED] PORTLAND AIRPORT, THAT TWO CHASE PLANES WHICH WERE FOLLOWING FIVE MILES BEHIND HIJACKED AIRCRAFT SUDDENLY VEERED TO THE EAST AND THEREAFTER MADE A RIGHT TURN. THE POINT OF THEIR CHANGE OF COURSE WOULD HAVE BEEN IN CLOSE PROXIMITY IN TIME AND LOCATION TO THAT BELIEVED WHERE UNSUB DEPARTED THE AIRCRAFT.

[REDACTED] ALSO POINTED OUT THERE IS A SMALL AIR FIELD SUITABLE FOR PARACHUTE JUMPING AND SO MARKED ON A SECTIONAL MAP IN CLOSE PROXIMITY TO AREA WHERE UNSUB IS BELIEVED TO HAVE DEPARTED THE AIRCRAFT.

PENDING

END.

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Approved: _______________ Sent ___________ M Per _______________ Special Agent in Charge ☆ U.S. GOVERNMENT PRINTING OFFICE: 1971-413-135 DB Cooper-33763