Cessna 150H N6741S

Summary

On 5 October 1996 at about 17:15 local time, a Cessna 150H registered N6741S was involved in an accident near Sunbury, Pennsylvania, 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

5 October 1996 at 17:15

Classification

Accident

Location

Sunbury, Pennsylvania, United States

Coordinates

40.8592, -76.7799

Aircraft

Cessna 150H

Registration

N6741S

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Selinsgrove → Shamokin

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

IAD97LA002

Nobody was injured.

failure of the cluster gear attaching bolts (of which one failed from fatigue), resulting in a disconnect of the gear and loss of engine power. An obstruction (rock) in the emergency landing area was a related factor.

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

Read the full NTSB narrative

The pilot reported that the engine lost power while climbing through 2200 msl. He stated that his attempts to restart the engine, using the emergency procedures, were unsuccessful. During a forced landing in a field, the airplane struck a rock and nosed over. The airplane was examined after the accident by an FAA inspector. The examination revealed that the four bolts that held the crankshaft cluster gear to the crankshaft had failed. The accessory gear box cover was removed and the cluster gear rotated freely. Examination of the four bolts revealed that one of the bolts failed due to fatigue in the threaded area. (Due to smearing, failure mode of the the other 3 bolts was not determined). The engine had over 356 hours since overhaul. The pilot stated that he was unsure why the prior owner had the engine overhauled.

Quoted verbatim from the NTSB record.