Wednesday, January 10, 2018

Cessna 182P Skylane, N6KW: Accident occurred August 18, 2015 at Bolivar Municipal Airport (M17), Polk County, Missouri

Analysis 

During cruise flight, the airplane experienced a total electrical failure. The private pilot diverted to the closest airport and conducted a no-flap landing, during which the airspeed was too high. The airplane subsequently departed the runway, struck a ditch, and nosed over, coming to rest inverted.

The voltage regulator failed a postaccident functional test. The accident is consistent with the loss of electrical power due to a failed voltage regulator and the pilot's improper execution of a precautionary landing.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
Total electrical failure due to a failed voltage regulator and the pilot's failure to maintain a proper airspeed during a precautionary landing, which resulted in a loss of directional control and a runway excursion.

Findings

Aircraft
DC regulator - Failure (Cause)
Airspeed - Not attained/maintained (Cause)

Personnel issues
Aircraft control - Pilot (Cause)

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

Additional Participating Entity:

Federal Aviation Administration / Flight Standards District Office; Kansas City, Missouri

Aviation Accident Final Report - National Transportation Safety Board: https://app.ntsb.gov/pdf


Investigation Docket - National Transportation Safety Board: https://dms.ntsb.gov/pubdms


http://registry.faa.gov/N6KW


Location: Bolivar, MO
Accident Number: CEN15LA369
Date & Time: 08/18/2015, 1025 CDT
Registration: N6KW
Aircraft: CESSNA 182P
Aircraft Damage: Substantial
Defining Event: Electrical system malf/failure
Injuries: 1 Minor
Flight Conducted Under: Part 91: General Aviation - Personal 

On August 18, 2015, about 1025 central daylight time, a Cessna 182P, single-engine airplane, N6KW, departed the runway surface during a precautionary landing at the Bolivar Municipal Airport (M17), Bolivar, Missouri. The private-rated pilot sustained minor injuries and the airplane was substantially damaged. The airplane was owned by a private individual and operated by the pilot as a personal flight under the provisions of 14 Code of Federal Regulations Part 91. Day, visual meteorological conditions prevailed, and no flight plan was filed for the flight that departed Joplin Regional Airport (JLN), Joplin, Missouri, and was destined for Spirit of St Louis Airport (SUS), St. Louis, Missouri.

During cruise flight, the airplane experienced a total electrical failure and the pilot elected to divert to M17 for a no-flap landing. The pilot reported that the airspeed was too fast on landing, and she landed long on the airport's 4,000 ft. long runway. The pilot added that with the excess speed she wasn't able to keep the airplane on the runway and the airplane went through the grass, and struck a ditch causing it to nose over where it came to rest inverted.

An examination of the wreckage showed the lower forward fuselage crushed upward and the nose gear broken aft. The right wing was bent downward at the root, and the right wing strut was bent inward at mid span. The top 12 inches of the vertical stabilizer and rudder were bent to the left about 70 degrees. Flight control continuity was confirmed. The airplane's voltage regulator and alternator were retained for further examination.

The alternator was examined at Aerotech of Louisville, Incorporated, Louisville, Kentucky, on January 19, 2016. The alternator passed all functional testing and a disassembly inspection of its components showed no anomalies.

The voltage regulator was examined at Lamar Technologies, Marysville, Washington, on January 27, 2016. The voltage regulator, part number VR600 and manufactured in June 1996, failed the functional test.

The pilot reported she had 185 total flight hours, and 90 hours in the airplane make and model.

No other anomalies were found with the airplane. 

Pilot Information

Certificate: Private
Age: 50, Female
Airplane Rating(s): Single-engine Land
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 3 Without Waivers/Limitations
Last FAA Medical Exam: 05/17/2015
Occupational Pilot: No
Last Flight Review or Equivalent: 11/29/2013
Flight Time: 185 hours (Total, all aircraft), 90 hours (Total, this make and model), 108 hours (Pilot In Command, all aircraft), 27 hours (Last 90 days, all aircraft), 16 hours (Last 30 days, all aircraft) 

Aircraft and Owner/Operator Information

Aircraft Manufacturer: CESSNA
Registration: N6KW
Model/Series: 182P
Aircraft Category: Airplane
Year of Manufacture: 1971
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 18260831
Landing Gear Type: Tricycle
Seats: 4
Date/Type of Last Inspection:
Certified Max Gross Wt.:
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time:
Engine Manufacturer: CONTINENTAL
ELT:
Engine Model/Series: O-470
Registered Owner: DAVID A SEIDL
Rated Power: 230 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: KSGF, 1270 ft msl
Observation Time: 0952 CDT
Distance from Accident Site: 21 Nautical Miles
Direction from Accident Site: 185°
Lowest Cloud Condition:  / 8000 ft agl
Temperature/Dew Point: 26°C / 21°C
Lowest Ceiling: Broken / 8000 ft agl
Visibility:  10 Miles
Wind Speed/Gusts, Direction: 12 knots, 210°
Visibility (RVR):
Altimeter Setting: 29.88 inches Hg
Visibility (RVV):
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: JOPLIN, MO (JLN)
Type of Flight Plan Filed: VFR
Destination: ST LOUIS, MO (SUS)
Type of Clearance: None
Departure Time:  CDT
Type of Airspace: Class G 

Airport Information

Airport: BOLIVAR MUNI (M17)
Runway Surface Type: Asphalt
Airport Elevation: 1092 ft
Runway Surface Condition: Dry
Runway Used: 36
IFR Approach: None
Runway Length/Width: 4000 ft / 75 ft
VFR Approach/Landing: Full Stop; Precautionary Landing; Straight-in 

Wreckage and Impact Information

Crew Injuries: 1 Minor
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 Minor
Latitude, Longitude: 37.596111, -93.348056 (est)

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