Friday, June 25, 2021

Loss of Control on Ground: Piper PA-46-350P Malibu Mirage, N110ST; accident occurred June 24, 2021 at St. Louis Lambert International Airport (KSTL), St. Louis County, Missouri

Aviation Accident Final Report - National Transportation Safety Board 

The National Transportation Safety Board did not travel to the scene of this accident. 

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; St. Ann, Missouri

Investigation Docket - National Transportation Safety Board:
Location: St. Louis, Missouri
Accident Number: CEN21LA312
Date and Time: June 24, 2021, 13:17 Local
Registration: N110ST
Aircraft: Piper PA 46-350P 
Aircraft Damage: Substantial
Defining Event: Loss of control on ground 
Injuries: 3 None
Flight Conducted Under: Part 91: General aviation - Personal


The pilot reported that while landing on a wet runway and as he applied brakes during the landing roll, the airplane began to hydroplane, and the nose landing gear collapsed. The airplane veered left and exited the side of the runway coming to a stop in the grass. The airplane sustained substantial damage to the engine mount. The pilot reported there were no preimpact mechanical failures or malfunctions with the airframe and engine that would have precluded normal operation. A review of the airplane’s maintenance records revealed that Piper Aircraft Service Bulletin (SB) 1103F (a recurring inspection of the engine mount for cracks every 100 hours) was complied with only once in the airplane’s service history, which was about 437 hours before the accident occurred. Based on the available information, it was undetermined if any preexisting defects in the engine mount contributed to nose landing gear collapse. The pilot reported the accident could have been prevented by “not applying brakes” and allowing a “continued roll out.”

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot’s failure to maintain directional control during the landing roll with hydroplaning conditions.


Personnel issues Aircraft control - Pilot
Aircraft Braking capability - Attain/maintain not possible
Environmental issues Wet surface - Contributed to outcome
Environmental issues Wet surface - Ability to respond/compensate

Factual Information

History of Flight

Landing-landing roll Abnormal runway contact
Landing-landing roll Loss of control on ground (Defining event)
Landing-landing roll Runway excursion
Landing-landing roll Landing gear collapse

Pilot Information

Certificate: Private 
Age: 68, Male
Airplane Rating(s): Single-engine land
Seat Occupied: Left
Other Aircraft Rating(s): None 
Restraint Used: 3-point
Instrument Rating(s): Airplane 
Second Pilot Present: No
Instructor Rating(s): Airplane single-engine
Toxicology Performed:
Medical Certification: Class 3 Without waivers/limitations
Last FAA Medical Exam: February 16, 2021
Occupational Pilot: No 
Last Flight Review or Equivalent: February 11, 2020
Flight Time: (Estimated) 6057 hours (Total, all aircraft), 1346 hours (Total, this make and model), 6000 hours (Pilot In Command, all aircraft), 30 hours (Last 90 days, all aircraft), 17 hours (Last 30 days, all aircraft), 4 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: Piper 
Registration: N110ST
Model/Series: PA 46-350P 
Aircraft Category: Airplane
Year of Manufacture: 2005 
Amateur Built:
Airworthiness Certificate: Normal 
Serial Number: 4636373
Landing Gear Type: Retractable - Tricycle 
Seats: 6
Date/Type of Last Inspection: October 16, 2020 Annual
Certified Max Gross Wt.: 4340 lbs
Time Since Last Inspection: 
Engines: 1 Reciprocating
Airframe Total Time: 1814 Hrs as of last inspection 
Engine Manufacturer: Lycoming Engines
ELT: C126 installed, not activated
Engine Model/Series: TIO-540-AE2A
Registered Owner: 
Rated Power: 350 Horsepower
Operator: On file 
Operating Certificate(s) Held: None
Operator Does Business As: None 
Operator Designator Code: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual (VMC)
Condition of Light: Day
Observation Facility, Elevation: KSTL,531 ft msl
Distance from Accident Site: 1 Nautical Miles
Observation Time: 13:25 Local 
Direction from Accident Site: 295°
Lowest Cloud Condition: Few / 5000 ft AGL
Visibility: 10 miles
Lowest Ceiling: Broken / 13000 ft AGL
Visibility (RVR):
Wind Speed/Gusts: 12 knots / 
Turbulence Type Forecast/Actual: None / None
Wind Direction: 240° 
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 30.01 inches Hg
Temperature/Dew Point: 27°C / 21°C
Precipitation and Obscuration:
Departure Point: Blountville, TN (TRI) 
Type of Flight Plan Filed: IFR
Destination: St. Louis, MO
Type of Clearance: IFR
Departure Time: 12:00 Local
Type of Airspace: Class B

Airport Information

Runway Surface Type: Asphalt; Concrete
Airport Elevation: 618 ft msl 
Runway Surface Condition: Wet
Runway Used: 12L/30R
IFR Approach: None
Runway Length/Width: 9003 ft / 150 ft
VFR Approach/Landing: Full stop; Straight-in

Wreckage and Impact Information

Crew Injuries: 1 None 
Aircraft Damage: Substantial
Passenger Injuries: 2 None 
Aircraft Fire: None
Ground Injuries: 
Aircraft Explosion: None
Total Injuries: 3 None 
Latitude, Longitude: 38.745331,-90.353213 (est)

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