Mooney M20S N602TF

Summary

On 31 December 2019 at about 22:06 local time, a Mooney M20S registered N602TF was involved in an accident near Olathe, Kansas, United States. 2 people were on board and 2 died. The aircraft was destroyed. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

31 December 2019 at 22:06

Classification

Accident

Location

Olathe, Kansas, United States

Nearest airport

Johnson County Executive (OJC)

Coordinates

38.8461, -94.7361

Aircraft

Mooney M20S

Registration

N602TF

Category

Airplane

Year built

2000

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Olathe → North Little Rock

Aircraft damage

Destroyed

Weather

VMC

Light

Day

NTSB number

CEN20FA049

2 people died.

The pilot’s failure to set the elevator trim properly for takeoff, which resulted in an exceedance of the airplane’s critical angle of attack during climb out, an aerodynamic stall, and the subsequent impact with terrain.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The pilot and a passenger were departing from the airport to return to their home base airport. A witness reported that nothing was out of the ordinary on the airplane’s initial rollout. However, the airplane rotated at a much slower speed than would be expected and immediately started to climb at a very high pitch attitude. The witness reported that as the airplane gained altitude, it appeared to fly slower to the point that the left wing stalled, causing the airplane to nose over and continue its trajectory straight into the ground just east of the runway. The witness stated that the engine power was “on” throughout the entire flight. Videos recorded near the accident site and the accident airplane’s engine monitor data were consistent with the witness description of the accident flight. The airplane did not exhibit any in-flight fire or smoke in the videos, and a ground fire was observed after impact. The pilot had purchased the airplane about 1 month before the accident and, according to his flight instructor, had accumulated 6.8 hours of instructional flight time. A disassembly examination of the engine revealed no preimpact anomalies that would have precluded normal operation. Review of photographs of an exemplar trim jack screw and the accident airplane’s jack screw revealed that the airplane’s trim system components exhibited a setting consistent with a full nose-up trim. The before takeoff checklist for the airplane make and model includes the step, “Elevator Trim….TAKEOFF SETTING.” The autopsy did not detect any significant natural disease. Toxicology testing detected a muscle relaxant and an antinausea medication in the pilot’s liver and muscle tissue samples; it was unknown why the pilot was using these impairing medications. The witness who saw the pilot before he took off observed nothing out of the ordinary in the pilot’s behavior and “no red flags” with respect to the pilot‘s actions. Thus, it could not be determined if effects from the pilot’s use of a muscle relaxant and an antinausea medication were factors in this accident. A low level of carbon monoxide was detected in the pilot’s blood. The concentration would not be at a level to cause impairment and thus was determined not to be a factor in the accident. Given the available information, it is likely the pilot departed with the elevator trim set to a full nose-up setting as opposed to the takeoff setting, which resulted in the airplane pitching up steeply after liftoff and the subsequent aerodynamic stall.

Quoted verbatim from the NTSB record.