Bird Strike Airworthiness Standards Max bird mass Windshield Airspeed Transport Indicators Airplanes 14 CFR 25 Empennage 1949 1950 1953 - CAR 4b.352 1949 – FAA TDC Report 62 1950 – FAA TDC Report 74 1952 - CAR 4b.612 1965 - Part 25.1323 (segregation) 1962 Viscount United 8 lbs 1970 - Part 25.631 1978 - Part 25.571 Airframe 1974 - Part 33.77 1960 Electra Eastern Engines 14 CFR 33 4 lbs 2000 Part 33.76 1975 DC-10 ONA . 1996 - Part 23.775 Windshield Commuters Airspeed 14 CFR 23 Indicators Empennage Airframe 4 lbs 1977 - Part 25.775 4 -8 lbs 2 lbs 1996 - Part 23.1323 No bird strike requirements 1996 - Part 29.631 Rotorcraft 14 CFR 29 1950 1960 1970 1980 1990 2000 2.2 lbs