A casual question here guys.. .. .How can a person not make the grade on an aircraft? I can only assume the applicant was not screened properly at the interview stage. A few appropiate questions on turbine engines perhaps, a few on the CAO's and CAR's and perhaps some human factors type questions on high altitude flight.. .A far as the practical training is concerned, if a candidate fails to make the grade isn't this a reflection on the quality of instruction?. .. .Not withstanding I'm sure there are some out there that should not be let lose in an aircraft but a Police PC-12? Somethings wrong somewhere.