Part 71, page 346

DB Cooper-30631

Document date 7 May 1964

Open in FBI Vault (Part 71, page 346 of the PDF)

FBI 164-81, Vault Part 71 p. 346 (DB Cooper-30631), Report, dated 7 May 1964, serial FC 751-1-1 (as read from the transcript) — cooper.theunsolved.net/parts/Cooper-Part-71/pages/346

Transcript

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

COND NO. | IRIG TIME | CABIN h ft ~ FT | CABIN R/C ~ FPM | PILOTS h ft ~ FT | PILOTS V± ~ KNOTS | COND NO. | IRIG TIME | CABIN h ft ~ FT | CABIN R/C ~ FPM | PILOTS h± ~ FT | PILOTS V± ~ KNOTS 1.21. 19.01 | 12.08 .28 | NA | NA | NA | NA | .02 CONT | 12.09 .50.2. | 10530 | 850 | 10420 | 126.0 | .29 | NA | NA | NA | NA | | .50.4 | 10530 | 850 | 10420 | 126.0 | .30 | 10470 | 50 | 10500 | 172.5 | | .50.6 | 10530 | 850 | 10420 | 126.0 | .31 | 10470 | 250 | 10490 | 170.5 | | .50.8 | 10530 | 800 | 10420 | 126.0 | .32 | 10480 | 300 | 10490 | 169.0 | | .51.0 | 10530 | 800 | 10420 | 126.0 .02 | 12.09 .42 | 10510 | -25 | 10420 | 127.0 | | .51.2 | 10530 | 800 | 10420 | 126.0 | .43 | 10510 | -25 | 10420 | 127.0 | | .51.4 | 10530 | 800 | 10420 | 126.0 | .44 | 10510 | 0 | 10420 | 126.5 | | .51.6 | 10530 | 800 | 10420 | 126.0 | .45 | 10510 | 0 | 10420 | 126.5 | | .51.8 | 10530 | 750 | 10420 | 126.0 | .46 | 10510 | 0 | 10420 | 126.0 | | .52.0 | 10530 | 700 | 10420 | 126.0 | .47 | 10510 | 25 | 10420 | 126.0 | | .52.2 | 10530 | 700 | 10420 | 126.0 | .47.2 | 10510 | 100 | 10420 | 126.0 | | .52.4 | 10530 | 700 | 10420 | 126.0 | .47.4 | 10510 | 250 | 10420 | 126.0 | | .52.6 | 10530 | 650 | 10420 | 126.0 | .47.6 | 10510 | 400 | 10420 | 126.0 | | .52.8 | 10530 | 600 | 10420 | 126.0 | .47.8 | 10510 | 500 | 10420 | 126.0 | | .53.0 | 10530 | 600 | 10420 | 126.0 | .48.0 | 10510 | 600 | 10420 | 126.0 | | .53.2 | 10530 | 600 | 10420 | 126.0 | .48.2 | 10510 | 700 | 10420 | 126.0 | | .53.4 | 10530 | 500 | 10420 | 126.0 | .48.4 | 10510 | 800 | 10420 | 126.0 | | .53.6 | 10530 | 450 | 10420 | 126.0 | .48.6 | 10510 | 800 | 10420 | 126.0 | | .53.8 | 10530 | 450 | 10420 | 126.0 | .48.8 | 10520 | 800 | 10420 | 126.0 | | .54.0 | 10530 | 400 | 10420 | 126.0 | .49.0 | 10520 | 800 | 10420 | 126.0 | | .54.2 | 10530 | 350 | 10410 | 126.0 | .49.2 | 10520 | 800 | 10420 | 126.0 | | .54.4 | 10530 | 300 | 10410 | 126.0 | .49.4 | 10520 | 850 | 10420 | 126.0 | | .54.6 | 10530 | 300 | 10410 | 126.0 | .49.6 | 10530 | 850 | 10420 | 126.0 | | .54.8 | 10530 | 250 | 10410 | 126.0 | .49.8 | 10530 | 850 | 10420 | 126.0 | | .55.0 | 10530 | 200 | 10410 | 126.5 | .50.0 | 10530 | 850 | 10420 | 126.0 | | .55.2 | 10530 | 200 | 10410 | 125.5

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AFT AIRSTAIR EXTENDED IN FLIGHT DB Cooper-30631 TEST 100-1 THE BOEING COMPANY SEC. 1.21.19 PAGE 13 727-22 N72700 D6-7777 CALC JIH-MB 3-17-64 REVISED DATE CHECK MB 3-17-64 APR GE 3-17-64 APR 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.

Boeing engineering flight test data table recording cabin altitude, cabin rate of climb, pilots altitude, and pilots airspeed at sub-second IRIG time intervals. Condition 1.21 transitions to Condition .02 (continued). Cabin altitude rises from ~10470 to 10530 ft, cabin R/C peaks at 850 FPM then declines. Pilots altitude steady ~10410-10420 ft, airspeed steady ~126 knots after initial readings of ~170 knots. Title block identifying this as a Boeing Company test report for the aft airstair extended in flight test (Test 100-1) on aircraft 727-22 N72700, related to DB Cooper case file 30631. Document number D6-7777. Calculated by JIH-MB, checked by MB, approved by GE, all dated 3-17-64.

Clean engineering data table with clear typewritten entries
Three hole-punch marks visible on left margin
Minor dot artifacts but all values legible

Part 71, page 346

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