Loss of Control in Flight · NTSB WPR19FA007

CESSNA T240 — Payson, AZ

2 fatal High-time pilot
DateOctober 14, 2018
LocationPayson, AZ
AircraftCESSNA T240
Purpose of flightPersonal
ConditionsDusk · Visual Meteorological Cond
Phase / occurrenceUncontrolled descent Collision with terr/obj (non-CFIT)
Pilot age63
Pilot total time2,100 hrs · Experienced
Time in typeUnknown
Fatalities2

Probable cause

The pilot's exceedance of the airplane's critical angle of attack while maneuvering for landing, which resulted in an aerodynamic stall/spin and a subsequent loss of control.

NTSB findings

  • Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Angle of attack-Capability exceeded - C
  • Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C

What happened

The pilot was approaching the airport for landing around dusk in visual meteorological conditions at the conclusion of a cross-country flight. Radar data depicted the airplane at 589 ft above ground level on a downwind leg for the runway at a groundspeed of 108 knots. The airplane then entered a right turn; however, rather than aligning with the runway on a final approach leg, the airplane continued the turn through 360° and continued on an extended downwind before entering another right turn. The airplane’s altitude and groundspeed was fluctuating throughout these maneuvers. Radar contact was lost near the accident site about 1 nautical mile from the end of the runway.

The airplane impacted the ground in a vertical, nose-down attitude consistent with an aerodynamic stall/spin. Damage signatures indicated that the engine was producing power at the time of the accident, and examination of the airframe and engine revealed no anomalies that would have precluded normal operation.

Analysis of the radar data revealed that the radius of the airplane's final turn was about 700 ft, which would have required a bank angle of about 50° based on the airplane's approximate speed. The data are consistent with the pilot's failure to compensate for the increased load factor during the turn and a subsequent exceedance of the airplane's critical angle of attack, which resulted in a stall/spin from which the pilot was unable to recover given the airplane's low altitude.

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

View the official NTSB docket →