United States. Department of Transportation. Federal Aviation Administration (1968). AC 140-4: Use of Audio-Visual Courses in Approved Pilot Ground Schools Certificated Under Part 141 (Report No. AC 140-4). United States. Department of Transportation. Federal Aviation Administration. https://doi.org/10.21949/1513484
United States. Department of Transportation. Federal Aviation Administration. AC 140-4: Use of Audio-Visual Courses in Approved Pilot Ground Schools Certificated Under Part 141. Report no. AC 140-4. United States. Department of Transportation. Federal Aviation Administration, 1968. https://doi.org/10.21949/1513484.
United States. Department of Transportation. Federal Aviation Administration AC 140-4: Use of Audio-Visual Courses in Approved Pilot Ground Schools Certificated Under Part 141. United States. Department of Transportation. Federal Aviation Administration, 1968, Report no. AC 140-4, ROSA P. https://doi.org/10.21949/1513484.
This circular informs operators of certificated pilot schools on the use of audio-visual training aids for instruction in approved ground school courses conducted under sections 141.47, 141.49, and 141.65 of the Federal Aviation Regulations.
United States. Department of Transportation. Federal Aviation Administration (1968). AC 140-4: Use of Audio-Visual Courses in Approved Pilot Ground Schools Certificated Under Part 141 (Report No. AC 140-4). United States. Department of Transportation. Federal Aviation Administration. https://doi.org/10.21949/1513484
United States. Department of Transportation. Federal Aviation Administration. AC 140-4: Use of Audio-Visual Courses in Approved Pilot Ground Schools Certificated Under Part 141. Report no. AC 140-4. United States. Department of Transportation. Federal Aviation Administration, 1968. https://doi.org/10.21949/1513484.
United States. Department of Transportation. Federal Aviation Administration AC 140-4: Use of Audio-Visual Courses in Approved Pilot Ground Schools Certificated Under Part 141. United States. Department of Transportation. Federal Aviation Administration, 1968, Report no. AC 140-4, ROSA P. https://doi.org/10.21949/1513484.
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