Saturday, June 08, 2019

Loss of Engine Power (partial): Cessna 150M, N6341K, accident occurred August 14, 2018 near Madison Municipal Airport (KMDS), Lake County, South Dakota

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

Additional Participating Entity:

Federal Aviation Administration / Flight Standards District Office; Rapid City, South Dakota

Aviation Accident Factual Report - National Transportation Safety Board:

Investigation Docket - National Transportation Safety Board:

Location: Madison, SD
Accident Number: CEN18LA329
Date & Time: 08/14/2018, 0800 CDT
Registration: N6341K
Aircraft: Cessna 150
Aircraft Damage: Substantial
Defining Event: Loss of engine power (partial)
Injuries: 1 None
Flight Conducted Under: Part 91: General Aviation - Instructional  

On August 14, 2018, about 0800 central daylight time, a Cessna 150M, N6341K, sustained substantial damage during a landing to a corn field near Madison, South Dakota, following a loss of engine power during cruise flight. The student pilot was not injured. The aircraft was registered to an individual and operated by the pilot under the provisions of 14 Code of Federal Regulations Part 91 as a solo instructional flight. Visual meteorological conditions prevailed for the flight, which was not operated on a flight plan. The local flight originated from the Madison Municipal Airport (MDS), Madison, South Dakota, about 0710.

The student pilot reported he was flying north of MDS when the airplane's engine began running rough. He attempted to return to MDS but was unable to reach the airport and landed in a corn field. The airplane nosed over during the forced landing and sustained substantial damage to both wings.

The airplane came to rest inverted in corn standing about 7 ft tall. Due to the location of the airplane in the middle of the corn field, the airplane was not recovered until 6 weeks after the accident after the crop had been harvested. Examination revealed that the engine's No. 3 cylinder exhaust valve was stuck in its valve guide and the No. 3 exhaust valve rocker arm was fractured.

Maintenance records showed that the airplane engine's most recent overhaul was completed on March 12, 2018. The most recent engine maintenance record entry dated August 11, 2018, indicated that the Nos. 1, 3, and 4 cylinders had been removed and sent back to the vendor that had completed the engine overhaul due to sticking valves. The cylinders were then reinstalled on the engine. According to the tachometer times noted in the maintenance entries, the engine had accumulated 207 hours since the overhaul as of the maintenance entry.

Pilot Information

Certificate: Student
Age: 38, Male
Airplane Rating(s): None
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used: 3-point
Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 2 Without Waivers/Limitations
Last FAA Medical Exam: 05/16/2018
Occupational Pilot: No
Last Flight Review or Equivalent:
Flight Time:

Aircraft and Owner/Operator Information

Aircraft Make: Cessna
Registration: N6341K
Model/Series: 150 M
Aircraft Category: Airplane
Year of Manufacture: 1975
Amateur Built: No
Airworthiness Certificate: Utility
Serial Number: 15077654
Landing Gear Type: Tricycle
Seats: 2
Date/Type of Last Inspection: 07/10/2018, Annual
Certified Max Gross Wt.: 1600 lbs
Time Since Last Inspection: 7 Hours
Engines: 1 Reciprocating
Airframe Total Time:  as of last inspection
Engine Manufacturer: Continental
ELT: C91  installed, activated, did not aid in locating accident
Engine Model/Series: O-200A
Registered Owner: On file
Rated Power: 100 hp
Operator: On file
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: MDS, 1718 ft msl
Distance from Accident Site:
Observation Time: 1255 UTC
Direction from Accident Site:
Lowest Cloud Condition: Few / 8000 ft agl
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: 3 knots /
Turbulence Type Forecast/Actual: /
Wind Direction: 150°
Turbulence Severity Forecast/Actual: /
Altimeter Setting: 29.95 inches Hg
Temperature/Dew Point: 21°C / 21°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Madison, SD (MDS)
Type of Flight Plan Filed: None
Destination: Madison, SD (MDS)
Type of Clearance: None
Departure Time: 0710 CDT
Type of Airspace: Class G

Airport Information

Airport: Madison Muni (MDS)
Runway Surface Type: N/A
Airport Elevation: 1718 ft
Runway Surface Condition: Vegetation
Runway Used: N/A
IFR Approach: None
Runway Length/Width:
VFR Approach/Landing: Forced Landing

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 None
Latitude, Longitude:  44.016389, -97.085556

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