The Lemon Index

Planes · Single-engine piston

Cessna 170.

Every U.S. accident NTSB investigated, 2008 to 2025.

Cessna 170

Photos: Aeroprints.com (Wikimedia Commons)

218accidents
5%were fatal
17deaths
4%aircraft destroyed

What happened. NTSB's defining event, share of accidents.

Loss of control on ground54%
Loss of control in flight8%
Nose over/nose down6%
Hard landing3%
Aerodynamic stall/spin2%
Collision during takeoff/land2%

Pilot or plane? How often NTSB listed an aircraft problem among the causes.

10%the plane was part of the cause
engine, systems, structure or propeller
90%people or weather only
pilot decisions, control, fuel planning

Out of 154 accidents where NTSB recorded a cause. When the plane was a cause, it was most often the landing gear system.

When. Phase of flight.

Landing57%
Takeoff18%
Approach7%
Initial climb6%
Enroute5%

Accidents per year.

20088
200916
201014
201110
201211
201319
201413
201515
20168
201715
201810
20198
202014
202112
202211
20238
202414
202512

More planes flying means more accidents, so counts aren't a safety score by themselves. Compare the shares above.

Source: NTSB aviation accident database, U.S. accidents 2008–2025. ntsb.gov · Every plane

Updated