In regards to the FAA’s requirements prior to take off, do they not stipulate that “Critical surfaces” must be free of contaminants prior to take-off? This is not the same as the aircraft being clear of any form of frozen precipitation. I’m citing N 8900.478. Is there a rule or notice that says it must be clear of all frozen precipitation?
Yes, 135.227 and the S1 Supplement of the POH has the answer. Also check 91.527. Wings, control surfaces, stabilizing surfaces, propeller, windshield etc. must all be free of ice.
In regards to the FAA’s requirements prior to take off, do they not stipulate that “Critical surfaces” must be free of contaminants prior to take-off? This is not the same as the aircraft being clear of any form of frozen precipitation. I’m citing N 8900.478. Is there a rule or notice that says it must be clear of all frozen precipitation?
Yes, 135.227 and the S1 Supplement of the POH has the answer. Also check 91.527. Wings, control surfaces, stabilizing surfaces, propeller, windshield etc. must all be free of ice.