Cessna 150F N8517G

Summary

On 26 June 2003 at about 18:30 local time, a Cessna 150F registered N8517G was involved in an accident near Williamson, New York, United States. 2 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

26 June 2003 at 18:30

Classification

Accident

Location

Williamson, New York, United States

Nearest airport

Williamson-Sodus Airport (3G7)

Coordinates

43.0833, -77.1203

Aircraft

Cessna 150F

Registration

N8517G

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Instructional

Phase of flight

Not recorded

Route

Williamson → Unknown

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

NYC03LA137

Nobody was injured.

The failure of a rocker arm shaft boss, which resulted in a partial loss of power and subsequent forced landing. A factor was the unsuitable terrain.

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

Read the full NTSB narrative

As the airplane was climbing, with the student pilot at the controls, the engine began to run rough. The certified flight instructor (CFI) took over the controls and elected to perform a forced landing to an apple orchard. During the forced landing, the left and right wings struck trees. The airplane came to rest upright. Examination of the engine revealed a fractured cylinder rocker shaft boss to the number one cylinder. The fracture was consistent with fatigue. An Airworthiness Directive, published in 1994, was issued to prevent possible engine power loss and subsequent engine failure. The AD required that maintenance personnel inspect the cylinder rocker shaft bosses for cracks at the next cylinder removal from the engine or engine overhaul, whichever occurs first, after the effective date of the AD. A revised AD became effective in 1996. Review of the airplane's engine maintenance records indicated that the last engine overhaul and cylinder removal was accomplished in 1977.

Quoted verbatim from the NTSB record.