Cessna 172M N92804 accident near New Castle, Virginia

Probable cause

The pilot's failure to abort the takeoff after recognizing that the airplane was not accelerating properly, which led to an aerodynamic stall. The reason for the lack of acceleration could not be determined because postaccident examinations did not reveal any anomalies that would have precluded normal operation.

NTSB analysis

The pilot reported that, before departure, he performed an engine run-up and then initiated takeoff from the 2,400-foot-long upsloping grass runway in accordance with soft-field takeoff procedures. The airplane was slow to produce speed; but, it lifted off the ground. Although the pilot attempted to fly in ground effect to produce more speed, he soon realized that he did not have enough speed or altitude to clear trees beyond the runway, so he maneuvered the airplane toward a clearing where he intended to land the airplane. However, the airplane then stalled, the left wing tip contacted the ground, and the airplane cart-wheeled. The pilot further reported that he should have recognized the "sluggish speed sooner and [aborted the] takeoff."

Examinations revealed that the magnetos were slightly out of timing and that both of the No. 2 cylinder's spark plugs contained lead and carbon deposits; however, it could not be determined how this affected engine power or whether these conditions would have been noticeable to the pilot during the engine run-up before departure or during the takeoff. Examinations revealed no anomalies that could have precluded normal operation. Postaccident performance calculations indicate that, based on the airplane's weight, the reported headwind component, and takeoff from a grass runway, the total distance to clear a 50-foot obstacle was 914 feet; therefore, the pilot should have been able to clear the trees.

Text from the NTSB. Open the NTSB docket for ERA13LA194 for the full record.