Part 71, page 351

DB Cooper-30636

Document date 7 May 1964

Open in FBI Vault (Part 71, page 351 of the PDF)

FBI 164-81, Vault Part 71 p. 351 (DB Cooper-30636), Report, dated 7 May 1964, serial FC 751-1-1 (as read from the transcript) — cooper.theunsolved.net/parts/Cooper-Part-71/pages/351

Transcript

The scan is the source; the transcript is machine-generated from it.

COND. NO. | IRIG TIME | CABIN h I FT | CABIN R/C FPM | PILOTS h I FT | PILOTS VI KNOTS 1.21. .19.01 | 12:08: :34 | 10480 | 300 | 10490 | 165.0 | :36 | 10490 | 300 | 10500 | 160.5 | :38 | 10520 | 500 | 10520 | 156.5 | :40 | 10540 | 700 | 10540 | 152.0 | :42 | 10570 | 750 | 10570 | 148.5 | :44 | 10590 | 800 | 10580 | 146.0 | :46 | 10600 | 750 | 10580 | 145.0 | :48 | 10600 | 400 | 10580 | 144.0 | :50 | 10600 | 100 | 10570 | 143.0 | :52 | 10600 | -150 | 10560 | 142.5 * | :54 | 10600 | -250 | 10540 | 142.0 12:09: :00 | 10570 | -350 | 10510 | 137.0 | :10 | 10560 | -200 | 10480 | 129.5 | :20 | 10530 | -100 | 10450 | 127.0 * | :27 | 10520 | -100 | 10440 | 126.5 | :29 | 10520 | -100 | 10440 | 126.5 | :31 | 10520 | -50 | 10430 | 127.0 | :33 | 10520 | -50 | 10430 | 127.0 | :35 | 10520 | -50 | 10430 | 127.0 | :37 | 10510 | -50 | 10420 | 127.0 | :39 | 10510 | -50 | 10420 | 127.0 | :40 | 10510 | -50 | 10420 | 127.0

*NOTE: PR ON 1/10 DURING THIS TIME

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COND. NO. | IRIG TIME | CABIN h I FT | CABIN R/C FPM | PILOTS h I FT | PILOTS VI KNOTS .02 | 12:10: :00 | 10530 | -50 | 10390 | 127.5 | :02 | 10530 | -50 | 10380 | 127.5 | :04 | 10530 | -50 | 10380 | 127.0 | :06 | 10530 | -50 | 10380 | 126.5 | :08 | 10530 | 0 | 10380 | 126.0 | :10 | 10530 | 50 | 10380 | 126.0 | :12 | 10530 | 50 | 10380 | 126.0 | :14 | 10530 | 50 | 10380 | 125.5 | :16 | 10530 | 50 | 10380 | 125.5 | :18 | 10530 | 50 | 10370 | 125.5 | :20 | 10530 | 0 | 10370 | 125.5 | :22 | 10530 | 0 | 10370 | 125.5 | :24 | 10520 | 0 | 10370 | 126.0 | :26 | 10520 | 0 | 10370 | 126.0 | :28 | 10520 | 0 | 10360 | 126.0 | :30 | 10520 | 0 | 10350 | 126.0 | :32 | 10520 | 0 | 10350 | 126.0 | :34 | 10520 | 0 | 10350 | 126.0 | :36 | 10520 | 50 | 10350 | 126.0 | :38 | 10520 | 50 | 10350 | 125.5 | :40 | 10520 | 100 | 10350 | 125.5 | :42 | 10520 | 100 | 10350 | 126.0 | :44 | 10520 | 100 | 10350 | 126.0 | :46 | 10520 | 100 | 10350 | 126.0 | :48 | 10520 | 100 | 10350 | 126.0 | :50 | 10520 | 100 | 10350 | 126.0

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CALC: LJ 3-31-64 REVISED DATE CHECK: MB 3-31-64 APR: ge 3-31-64 APR:

AFT AIRSTAIR EXTENDED IN FLIGHT DB Cooper-30636 TEST 100-1

THE BOEING COMPANY SEC 1.21.19 PAGE 18

727-22 N72700 D6-7771

TD 1040 B-R7 6-7000

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.

Left-half table of flight test data recording cabin altitude (ft), cabin rate of change (fpm), pilots altitude (ft), and pilots vertical speed (knots) at two-second intervals from 12:08:34 through 12:09:40. Condition numbers 1.21 / .19.01. Note indicates pressure recording was on 1/10 scale during asterisked entries. Right-half table continuing flight test data from 12:10:00 through 12:10:50 under condition .02. Cabin altitude stabilizes around 10520-10530 ft with small rate-of-change values, and pilots altitude settles near 10350-10380 ft at approximately 125.5-127.5 knots. Title block and approval block for Boeing report page. Document is page 18 of section 1.21.19, covering 'Aft Airstair Extended in Flight' test (TEST 100-1) for DB Cooper case 30636. Aircraft is a 727-22, registration N72700. Calculated, checked, and approved on 3-31-64. Boeing document number D6-7771.

Clean photocopy of a Boeing engineering data table
Some minor dot artifacts but all values clearly readable

Part 71, page 351

Dates mentioned

Transcript