Part 71, page 343

DB Cooper-30628

Document date 7 May 1964

Open in FBI Vault (Part 71, page 343 of the PDF)

FBI 164-81, Vault Part 71 p. 343 (DB Cooper-30628), Report, dated 7 May 1964, serial FC 751-1-1 (as read from the transcript) — cooper.theunsolved.net/parts/Cooper-Part-71/pages/343

Transcript

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

CHARACTERISTICS WITH AFT AIRSTAIR EXTENDED

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TEST 100-1 (CAVITY SIDE PANELS REMOVED)

1.21.19.01 | 12:09:19.1 | 125.9 | 10418 | 132,600 | 30.2 | 25 | UP | 0 | -3.91 | OPEN | UP | -.06 | "TRIM BEFORE EXTENDING AIRSTAIR" 1.21.19.02 | 12:10:36.9 | 124.5 | 10323 | 132,400 | 30.3 | 25 | UP | 0 | -3.82 | OPEN | 8.54 | -.04 | "AIRSTAIR ALLOWED TO FREE-FALL" 1.21.19.05 | 12:13:11.1 | 125.8 | 10703 | 132,000 | 30.1 | 25 | UP | 0 | -3.50 | OPEN | 13.66 | 0 | "AIRSTAIR EXTENDED WITH HYDRAULIC POWER" 1.21.19.03 | 12:16:13.9 | 301.4 | 10420 | 131,400 | 27.8 | 0 | UP | 0 | -0.72 | CLOSED | 10.22 | -.04 | "TRIM BEFORE ACCELERATION TO Vmo" 1.21.19.03 | 12:18:14.8 | 394.2 | 10540 | 130,900 | 29.8 | 0 | UP | 0 | +2.45 | CLOSED | 5.29 | -.12 | "TRIM AT Vmo"

TEST 100-3 (PRODUCTION PANELS INSTALLED IN CAVITY)

1.21.19.06 | 12:04:00.1 | 127.1 | 10035 | 133,200 | 27.5 | 25 | UP | 0 | +5.54 | OPEN | UP | -.04 | "TRIM BEFORE EXTENDING AIRSTAIR" 1.21.19.06 | 12:04:53.0 | 125.0 | 9778 | 133,100 | 27.4 | 25 | UP | 0 | 5.49 | OPEN | 8.89 | -.02 | "AIRSTAIR ALLOWED TO FREE-FALL" 1.21.19.07 | 12:06:47.8 | 206.5 | 9564 | 132,700 | 27.5 | 0 | UP | 0 | -1.75 | CLOSED | 10.29 | -.04 | "TRIM BEFORE ACCELERATION TO Vmo" 1.21.19.07 | 12:08:38.9 | 394.9 | 9541 | 132,300 | 27.3 | 0 | UF | 0 | +0.44 | CLOSED | 6.33 | -.08 | "TRIM AT Vmo" 1.21.19.09 | 12:10:41.0 | 300.2 | 9550 | 132,000 | 27.5 | 0 | UF | [illegible] | -10.6 | -0.28 | OPEN | UP | 0 | "ATTEMPT TO MANUALLY RELEASE AIRSTAIR" 1.21.19.37 | 12:11:15.1 | 303.5 | 9463 | 131,700 | 27.4 | 0 | UP | +4.6 | -0.41 | OPEN | UP | 0 | "ATTEMPT TO MANUALLY RELEASE AIRSTAIR"

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Calc. C. Clark 4/6/[illegible] REVISED DATE Trac. ___ Chk. ___ Appr. ___ Appr. ___

AFT AIRSTAIR EXTENDED IN FLIGHT

727-22 N 7200

D6-7771

THE BOEING COMPANY Sec. 1.21.19 Page 10

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DATA SHEET

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DB Cooper-30628

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.

Title of the Boeing data sheet describing flight test characteristics with aft airstair extended. Boeing flight test data table recording characteristics of a 727-22 aircraft (N7200) with aft airstair extended. Two test series: TEST 100-1 with cavity side panels removed and TEST 100-3 with production panels installed in cavity. Records flight parameters including speed, altitude, weight, CG, flap settings, stick position, stabilizer position, and airstair door position under various conditions such as free-fall extension, hydraulic extension, acceleration to Vmo, and manual release attempts. Boeing document approval block showing calculator C. Clark, document number D6-7771, aircraft 727-22 registration N7200, section 1.21.19 page 10. Label indicating this is a data sheet. FBI case reference stamp identifying this document as part of the D.B. Cooper case file.

Scanned engineering data sheet with some faded columns
Hole punches obscure small portions of the top row
Handwritten entries in table rows are mostly legible

Part 71, page 343

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