8. Fly into instrument weather conditions without knowing how to fly on instruments.
Crashed: Piper PA-28-160, Jan. 4, 2009, Indiana, Pennsylvania
9. Make too steep a turn onto the base leg of the runway approach at too slow a speed. Crashed: Cirrus SR22, Feb. 2, 2008, Lindsay, Oklahoma
10. Fail to push the oil dipstick all the way back in.
Crashed: Piper PA-31 Navajo, Nov. 8, 2005, Ankeny, Iowa
11. Turn back to the runway you just took off from when the engine quits.
Crashed: Vans RV-6, Oct. 28, 2006, Turlock, California
12. Overload the aircraft with parachutists who bunch up in the aft fuselage.
Crashed: Fletcher FU-24-954, Fox Glacier, South Westland, New Zealand, Sept. 4, 2010
13. Fail to remove debris or ice from the static port, resulting in inaccurate altimeter, airspeed, and vertical speed readings.
Emergency landing: Boeing 717-200, May 12, 2005, Union Star, Missouri
14. Take off in an aircraft in which the linking mechanisms for the ailerons have been reversed. Crashed: Spectrum 33, July 25, 2006, Spanish Fork, Utah
15. Land long on a short runway with a tailwind.
Landing gear collapsed: Mooney M20B, Aug. 25, 1990, Glenwood Springs, Colorado
16. Take off or land during a microburst.
Crashed: Lyons Navajo HKS, Aug. 6, 2008, Waterville, Washington
17. Take off or land a light aircraft in the wake turbulence of a departing jet.
Ground-looped: Piper PA-18, Aug. 9, 2009, Aspen, Colorado