Claxton S-12 UNREG

Summary

On 12 September 2004 at about 18:20 local time, a Claxton S-12 registered UNREG was involved in an accident near Oconomowoc, Wisconsin, United States. One person was on board and one died. The aircraft was destroyed. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

12 September 2004 at 18:20

Classification

Accident

Location

Oconomowoc, Wisconsin, United States

Coordinates

43.1001, -88.4898

Aircraft

Claxton S-12

Registration

UNREG

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Oconomowoc → Sturtevant

Aircraft damage

Destroyed

Weather

VMC

Light

Day

NTSB number

CHI04LA256

1 person died.

The loss of engine power due to the seizure of the pistons and the pilot's failure to maintain airspeed which resulted in an inadvertent stall. The previous damage to the pistons due to earlier seizure occurrences was a factor.

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

Read the full NTSB narrative

The un-registered airplane was destroyed when it impacted the ground following an engine failure after takeoff. The non-certificated pilot was fatally injured. A witness reported seeing the airplane and hearing the engine "quit". The airplane then made a series of gliding turns before it impacted into a marsh. The witness did not see the impact. Examination of the airplane showed no anomalies with respect to the airframe or control system. The engine's pistons exhibited scuffing and scoring indicative of a seizure. The marks on the piston contained carbon deposits indicating that the engine had experienced a seizure prior to the accident flight that had not been repaired.

Quoted verbatim from the NTSB record.