WAir operator's certificateWAir traffic controllerWAircraft maintenance engineer (Canada)WAircraft maintenance technicianWAircraft registrationWAircrewWAirworthinessWAsian Aviation Centre (Sri Lanka)WBelgian aircraft registration and serialsWCivil Aerospace Medical InstituteWClass ratingWDispatcherWETOPSWFlight engineerWFlight instructorWFlight trainingWGlider pilot licenseWPilot certification in the United StatesWPilot licensing in CanadaWPrivate pilot licenceWSupplemental type certificateWType certificateWType ratingWUnited Kingdom aircraft registration
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