Part 71, page 349

DB Cooper-30634

Document date 7 May 1964

Open in FBI Vault (Part 71, page 349 of the PDF)

FBI 164-81, Vault Part 71 p. 349 (DB Cooper-30634), Report, dated 7 May 1964, serial FC 751-1-1 (as read from the transcript) — cooper.theunsolved.net/parts/Cooper-Part-71/pages/349

Transcript

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COND NO. | IRIG TIME | CABIN h I ~FT | CABIN R/C ~FPM | PILOTS h I ~FT | PILOTS V_I ~KNOTS | COND NO. | IRIG TIME | CABIN h I ~FT | CABIN R/C ~FPM | PILOTS h I ~FT | PILOTS V_I ~KNOTS 1.21 | 12.17 | | | | | 1.21 | 12.18 | | | | 19.03 | .36 | 10840 | -100 | 10600 | 349.0 | 19.03 | .28 | 10780 | -700 | 10510 | 401.5 | .38 | 10840 | -100 | 10600 | 353.5 | | .29 | 10690 | -1500 | 10510 | 400.0 | .40 | 10840 | -100 | 10600 | 357.0 | .03 | .30 | 10600 | -2100 | 10500 | 398.5 | .42 | 10840 | -100 | 10600 | 360.0 | | .32 | 10500 | -2800 | 10490 | 394.0 | .44 | 10840 | -100 | 10600 | 363.0 | | .34 | 10500 | -1800 | 10480 | 389.5 | .46 | 10840 | -50 | 10610 | 366.0 | | .36 | 10500 | -1100 | 10470 | 385.5 | .48 | 10840 | 0 | 10610 | 368.0 | | .38 | 10550 | 800 | 10470 | 381.0 | .50 | 10840 | 0 | 10620 | 371.5 | | .40 | 10620 | 1300 | 10470 | 377.0 | .52 | 10840 | 50 | 10620 | 375.0 | | .42 | 10660 | 1400 | 10500 | 372.5 | .54 | 10840 | 100 | 10630 | 377.0 | | .44 | 10690 | 1400 | 10530 | 368.0 | .56 | 10840 | 100 | 10630 | 379.5 | | .46 | 10710 | 1200 | 10560 | 363.5 | .58 | 10840 | 100 | 10640 | 382.5 | | .48 | 10750 | 1100 | 10590 | 358.5 12.18 | .00 | 10840 | 100 | 10640 | 385.5 | | .50 | 10760 | 900 | 10600 | 355.0 | .02 | 10840 | 100 | 10640 | 388.0 | | .52 | 10780 | 800 | 10610 | 353.0 | .04 | 10840 | 100 | 10640 | 391.0 | | .54 | 10790 | 800 | 10620 | 349.0 | .06 | 10840 | 100 | 10650 | 393.5 | | .56 | 10800 | 700 | 10630 | 344.0 | .08 | 10850 | 100 | 10650 | 397.0 | | .57 | 10810 | 700 | 10630 | 342.5 | .10 | 10850 | 100 | 10640 | 399.5 | 12.19 | .00 | 10820 | 600 | 10650 | 337.0 | .12 | 10850 | 50 | 10630 | 400.5 | | .10 | 10910 | 500 | 10740 | 320.0 | .14 | 10850 | 0 | 10620 | 400.5 | | .20 | 10810 | -1600 | 10710 | 309.5 | .16 | 10850 | -50 | 10600 | 401.5 | | .30 | 10670 | -900 | 10560 | 298.0 | .18 | 10850 | -100 | 10590 | 402.5 | | .40 | 10670 | 200 | 10570 | 286.5 | .20 | 10850 | -100 | 10570 | 404.5 | | .50 | 10710 | 600 | 10680 | 271.5 | .22 | 10840 | -250 | 10550 | 406.0 | 12.20 | .00 | 10760 | 300 | 10720 | 261.0 | .24 | 10830 | -300 | 10530 | 406.5 | | .02 | 10760 | 100 | 10720 | 260.0 | .26 | 10820 | -300 | 10520 | 405.0 | | .04 | 10760 | 50 | 10710 | 257.5

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CALC LJ-MB 3-17-64 REVISED DATE CHECK MB 3-17-64 APR [guess: ga] 3-17-64 APR TD 1040 B-R7

AFT AIRSTAIR EXTENDED IN FLIGHT DB Cooper-30634 TEST 100-1 D6-7771 THE BOEING COMPANY SEC. 1.21.19 PAGE 16 S-7000

AI notes

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Boeing flight test data table recording cabin altitude, cabin rate of climb, pilots altitude, and pilots airspeed at two-second intervals during the aft airstair extension in flight, related to DB Cooper case reconstruction test 100-1. Data spans IRIG times from 12.17.36 through 12.20.04. Cabin altitude holds steady around 10840 ft initially, then drops significantly around 12.18.28-32 (to 10500 ft) before recovering. Pilot airspeed increases from 349 to ~406 knots then decreases to 257.5 knots. Boeing document title block showing calculation, check, and approval signatures dated 3-17-64 for DB Cooper test 100-1, aft airstair extended in flight. Document number D6-7771, section 1.21.19, page 16.

Clear typewritten tabular data
Some minor artifacts from scanning but all values legible

Part 71, page 349

Dates mentioned

Transcript