Cessna P210N N7736K

Summary

On 20 July 2004 at about 22:00 local time, a Cessna P210N registered N7736K was involved in an accident near Douglas, Wyoming, United States. 4 people were on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

20 July 2004 at 22:00

Classification

Accident

Location

Douglas, Wyoming, United States

Nearest airport

Converse County Airport (DGW)

Coordinates

42.7491, -105.3908

Aircraft

Cessna P210N

Registration

N7736K

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Rapid City → Provo

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

DEN04LA107

Nobody was injured.

the failure of the engine's crankshaft due to the rotation of the engine's number two bearing, which resulted in the oil starvation of the crankshaft's number 2 main journal. Contributing factors include the engine's improper maintenance, and the in-flight collision with a fence post during a forced landing.

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

Read the full NTSB narrative

According to the pilot, while in cruise flight at 22,000 feet msl, the engine "quit." The pilot stated that the propeller continued to "windmill," and at that time he noted approximately 50 gallons of fuel remaining. The pilot's attempts to restart the engine were unsuccessful. He declared an emergency and was diverted to a nearby airport. On final approach to runway 28, the airplane's left main landing gear struck a fence post. The airplane landed approximately 200 feet short of the runway threshold and its left main landing gear collapsed. The airplane veered left of the runway centerline and came to a stop in the grass. The impact buckled the left wing tip and left horizontal stabilizer. An examination of the engine revealed a 7/8-inch by 3/8-inch hole in the top of the crankcase, just forward of the number 1 cylinder. Further examination revealed the engine crankshaft was fractured at the number 2 rod journal. The crankshaft exhibited thermal discoloration and impact marks at the number 2, 3, 4, and 5 rod journals. Rotational scoring and thermal discoloration was observed on the crankshaft's number 2 main bearing. The number 2 bearing was fragmented and fretting was observed on the crankcase halves at the number 2 bearing through bolts. The engine maintenance records indicated on November 17, 2003, at 2,845.0 hours, during the airplane's most recent 100-hour inspection, the number 2 cylinder was replaced. At the time of the accident, the total time was 3,083.0 hours.

Quoted verbatim from the NTSB record.