01255nam 2200361Ia 450 991069805010332120090217110538.0(CKB)5470000002394502(OCoLC)308362376(EXLCZ)99547000000239450220090217d2001 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierAir carrier operational approval and use of TCAS II[electronic resource][Washington, D.C.] :U.S. Dept. of Transportation, Federal Aviation Administration,[2001]1 volume (various pagings) digital, PDF fileAdvisory circular ;AC no. 120-55BTitle from PDF caption (viewed Feb 17, 2009)."10/22/01."AC 120-55A, dated August 27, 1993, is cancelled.AirplanesCollision avoidanceFlight controlElectronic equipmentAirplanesCollision avoidance.Flight controlElectronic equipment.GPOGPOBOOK9910698050103321Air carrier operational approval and use of TCAS II3180753UNINA