Seattle Air Route Traffic Control Center transcription of air-ground communications with NW Flight 305
This copy: Part 36 pp. 15–21Also filed at Part 110 pp. 196–202 (primary)
This copy’s own title
FAA transcription of air-ground communications between Seattle ARTCC positions and NW 305
— revised to match this copy’s own text.
Another copy of this document is the primary, most legible copy: Part 110 pp. 196–202.
Copies may differ in what was redacted.
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Id: Cooper-Part-36:015-021
Subject: Cooper Files: Cooper-Part-36:015-021 Document: FAA transcription of air-ground communications between Seattle ARTCC positions and NW 305 Id: Cooper-Part-36:015-021 Page: https://cooper.theunsolved.net/documents/Cooper-Part-36%3A015-021 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 36 pp. 15–21 (DB Cooper-6238, DB Cooper-6240, DB Cooper-6241, DB Cooper-6242, DB Cooper-6243, DB Cooper-6244), Report — cooper.theunsolved.net/documents/Cooper-Part-36%3A015-021
Seattle Air Route Traffic Control Center
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Name of Facility Preparing Transcription Seattle Air Route Traffic Control Center
Subject of Transcription Air-Ground Communications Pertaining to the Incident to Northwest Airlines Flight 305
Date and Period of Time Covered by Transcription 0337:11 GMT to 0545:29 GMT 25 November 1971
Agencies Making Transmissions and Abbreviation of Each Northwest Airlines Flight 305 NW305 Seattle ARTCC Position R2 SEA R2 Seattle ARTCC Position R5 SEA R5 Seattle ARTCC Position R6 SEA R6 Seattle ARTCC Position R10 SEA R10
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I HEREBY CERTIFY that the following is a true transcription of the recorded conversation pertaining to the subject incident.
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[signature block - blank or redacted]
Chief, Seattle ARTCC
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b6 Per FAA b7C
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I certify that this is a true copy of the origin[al]
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b6 Per FAA b7C DB Cooper-6238
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0337:11 NW 305 Northwest three oh five we're ah (7:37 PM, PST) 0337:17 SEA R2 Northwest three zero five ident verify assigned one zero thousand
0337:23 NW 305 (Unintelligible) three zero five
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0339:43 SEA R2 Northwest three zero five say altitude now
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0340:02 SEA R2 Northwest one zero correction Northwest three zero five say altitude please
0340:06 NW 305 Three oh five through sixty five hundred ah trying to get the steps down down back there ah
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0340:37 NW 305 One oh five ah three oh five we're gonna level off here for a while at seven thousand he wants the steps down and ah we're gonna have er about down to a hundred and sixty knots
0340:48 SEA R2 Northwest three zero five roger
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0344:22 SEA R2 Northwest three zero five advise if you change altitudes ever
NW 305 Okay we'll hold at seven here we got the back steps down now and ah it looks like we aren't gonna be able to climb anymore ah we'll hold seven thousand
0344:34 SEA R2 Northwest three oh five roger (7:44 P.M, PST)
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Page 2
0349:18 SEA R2 Northwest three zero five in event of lost (7:49 Pm, PST) communications contact Seattle Center one three three point niner
0350:05 SEA R2 Northwest three zero five Toledo altimeter two niner niner eight
0351:31 NW 305 Center Northwest three oh five ah we're gonna climb out climbing up ah to ten thousand and ah we're through nine now
0351:42 SEA R2 Northwest three zero five roger report level at one zero thousand
NW 305 Roger
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0353:34 NW 305 Northwest three oh five we're leveling at ten thousand
SEA R2 Northwest three oh five roger
0353:40 NW 305 Airspeed in the vicinity of one seventy one eighty
SEA R2 Three oh five roger
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0359:10 SEA R2 Northwest three zero five contact Seattle Center one three three point niner
0359:15 NW 305 Ah one thirty three point nine (7:59 P.M. PST) - - - - - -
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Page 3
0413:14 NW 305 Center four oh five (unintelligible) twenty point (8:13PM, PST) nine ten thousand
SEA R5 Northwest three zero five ident
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0415:52 SEA R5 Northwest three zero five the Portland ah altimeter three zero zero three
NW 305 Zero zero three
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0433:36 SEA R5 Northwest three zero five contact Seattle Center one two five point eight
0433:46 NW 305 Twenty five point eight so long
SEA R5 Good day sir
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0433:51 NW 305 Seattle Center Northwest three zero five ten thousand
0433:55 SEA R6 Northwest three zero five Seattle Center one zero thousand ident
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0445:45 SEA R6 Northwest three zero five Eugene altimeter three (8:45PM-PST) zero zero six
NW 305 Ah one three zero point six
DB Cooper-6241 - 197 -
Page 4
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SEA R6 Negative sir Eugene altimeter three sero sero six
NW 305 Okay switching
SEA R6 Negative sir remain on this frequency that's an altimeter ah the current altimeter is three zero one one
0446:06 NW 305 ah okay three sero one one (8:46 Pm, PST)
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0454:47 SEA R6 Northwest three sero five Seattle radio check
NW 305 Three oh five land and clear
0454:53 SEA R6 Roger sir I lost your transponder
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0503:36 SEA R6 Northwest three zero five contact Seattle Center now on one two five point three
0503:41 NW 305 Okay twenty five point three Northwest three oh five
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0503:57 NW 305 Seattle Center Northwest three sero five at ten thousand
0504:05 SEA R10 Northwest three sero five Seattle Center ident (9:04 8, M-PST)
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- 198 - DB Cooper-6242
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(8:46 Pm, PST) (9:04 8, M-PST)
Page 5
0513:10 SEA R10 Northwest three zero five Medford altimeter three (9:13 PM, PST) zero one three
0513:16 NW 305 Three zero one three
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0528:01 SEA R10 Northwest three zero five request the outside air temperature at your altitude
NW 305 Ah three oh five you came on with somebody else say again
SEA R10 Northwest three zero five request the outside air temperature at your altitude
0528:28 NW 305 Ah (unintelligible) minus five
SEA R10 Understand minus five zero five
NW 305 (Unintelligible)
SEA R10 Northwest three zero five verify that temperature as centigrade
0529:04 NW 305 That's okay centigrade
SEA R10 Roger
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0538:31 SEA R10 Northwest three zero five the Montague altimeter (9:38 PM, PST) three zero one one
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Page 6
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0941:48 SEA R10 Northwest three zero five the Montague altimeter (9:41PM, PST) three zero one one
0941:52 NW 305 Three zero one one roger three oh five
0943:26 NW 305 Ah Northwest three zero five
SEA R10 Northwest three zero five go ahead
\0943:32 NW 305 Roger we'd like to start climb to eleven thousand (unintelligible) okay with you
SEA R10 Northwest three zero five ah climb to one one thousand under your conditions are approved report reaching
0943:46 NW 305 Three oh five
0945:20 SEA R10 Northwest three zero five contact Oakland Center on one two zero point four good luck sir
0945:29 NW 305 Okay one two zero point four thank you (9:45PM, PST)
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DB Cooper-6244
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