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Number Office Title Date
90-42F AFS-820 Traffic Advisory Practices at Airports without Operating Control Towers Contains good operating practices and procedures for use when approaching or departing airports without an operating control tower and airports that have control towers operating part time. Includes changes in radio frequencies and phraseology. 05-21-1990
90-100A AFS-400 U.S Terminal and En Route Area Navigation (RNAV) Operations This advisory circular provides operational and airworthiness guidance regarding operation on U.S. Area Navigation (RNAV) routes, Standard Instrument Departures (SIDs), and Standard Terminal Arrivals (STARs). 03-01-2007
90-95 AFS-800 Unanticipated Right Yaw in Helicopters Examines the unanticipated right yaw phenomenon, the circumstances under which it may be encountered, how it can be prevented, and how the pilot should react if it is encountered. 02-07-1995
90-108 AFS-400 Use of suitable Area navigation (RNAV) system on Conventional Routes and Procedures

This advisory circular (AC) provides operational and airworthiness guidance regrading the suitablity and use of RNAV systems while operating on or transitioning to, conventional i.e. non-RNAV, routes and procedures within the United States (US) National Airspace System (NAS).

03-03-2011
90-58C AFS-310 VOR Course Errors Resulting from 50 kHz Channel Mis-Selection Provides information concerning a potentially hazardous situation when a 200 channel VOR receiver is inadvertently mistuned by 50 kHz from the frequency of a 100 kHz ground station. 04-07-1975
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