Mechanical & Engine Failure · NTSB ERA15FA362

CESSNA 150H — Morrisville, NY

2 fatal Low-time pilotLow altitude
DateSeptember 20, 2015
LocationMorrisville, NY
AircraftCESSNA 150H
Purpose of flightPersonal
ConditionsDay · Visual Meteorological Cond
Phase / occurrenceManeuvering Loss of engine power (total)
Pilot age18
Pilot total time131 hrs · Low time
Time in type3 hrs
Fatalities2

Probable cause

The pilot's failure to maintain airspeed and her exceedance of the airplane's critical angle-of-attack, which led to an aerodynamic stall, following a total loss of engine power for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.

NTSB findings

  • Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Airspeed-Not attained/maintained - C
  • Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Angle of attack-Not attained/maintained - C
  • Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
  • Not determined-Not determined-(general)-(general)-Unknown/Not determined - C

What happened

The private pilot rented the airplane for a local pleasure flight and departed the airport with full fuel tanks. The airplane had been flying for about 30 minutes and then began a series of turns with its altitude fluctuating between 1,900 and 2,100 ft mean sea level (about 600 to 800 ft above ground level). About that time, one witness reported the engine began "spitting and sputtering" and experienced a total loss of power. Other witnesses reported that the engine stopped, restarted, and then lost power again. The airplane subsequently pitched nose down and entered a spin before ground impact, which is indicative of an aerodynamic stall. Postaccident examination of the airframe and engine did not reveal any evidence of preimpact malfunctions; however, damage to the engine and its associated components precluded a functional check of the engine. Additionally, there were no anomalies noted or reported with the fuel source that would have resulted in a loss of engine power. Although the environmental conditions were favorable for serious carburetor icing at glide power, it is likely the pilot was operating the airplane in cruise flight before the reported engine fluctuations.

An editorial "what led to it / how to avoid it" analysis for this accident is generated separately and will appear here.

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