Pigs*3,4,5 H.A-C.A. Technical Memorandum No. 664 … Pig.3 Causes of all forced landings in 1930 involving no injury in and in nurn'ber per 1,000 flying hours. Letters^refer to corresponding lines in L'alDles IV and V. (See footnote to Cal)le >:XII.) rH OO If) o • • fH OCO CO u-j • * CO LOin O CO 00 00 CO CO • « CO f:) i ! VD cn o CO CO 00 jCO: r 00…
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