N43866

Substantial
None

Mitsubishi MU2BS/N: 757SA

Accident Details

Date
Monday, December 30, 2019
NTSB Number
WPR20LA054
Location
Big Piney, WY
Event ID
20191230X20237
Coordinates
42.582221, -110.108886
Aircraft Damage
Substantial
Highest Injury
None
Fatalities
0
Serious Injuries
0
Minor Injuries
0
Uninjured
4
Total Aboard
4

Probable Cause and Findings

The failure of the right propeller position to correspond to the throttle change when moved to the beta position for reasons that could not be determined based on available evidence.

Aircraft Information

Registration
N43866
Make
MITSUBISHI
Serial Number
757SA
Engine Type
Turbo-shaft
Year Built
1980
Model / ICAO
MU2BMU2
Aircraft Type
Fixed Wing Multi Engine
No. of Engines
2

Registered Owner (Historical)

Name
SALE REPORTED
Address
PO BOX 950640
Status
Deregistered
City
OKLAHOMA CITY
State / Zip Code
OK 73195-0640
Country
United States

Analysis

On December 30, 2019, about 1445 mountain standard time, a Mitsubishi MU-2-60 airplane, N43866, was substantially damaged when it was involved in an accident at the Miley Memorial Field Airport (BPI), Big Piney, Wyoming. The private pilot and three passengers were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight.

The pilot reported that the approach was normal, and he did not experience any issues when the airplane made contact with the runway. However, as he moved both throttles to the beta position, it appeared that the left propeller went to beta position while the right one did not. This resulted in a course deviation about 30°- 35°. An attempt to correct the drift with the nose gear control was unsuccessful. The airplane departed the runway and began to turn which, led to the separation of the right main landing gear, collision of the right wing with terrain, and the right-wing tip separation. The airplane came to rest off the left side of the runway with the nose of the airplane oriented towards the approach end.

The airplane was secured and retained at BPI for further examination. The airplane was subsequently sold and removed from the airport before an examination could be coordinated.

Data Source

Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# WPR20LA054