Cessna 210L N5060V

Summary

On 24 April 2001 at about 18:45 local time, a Cessna 210L registered N5060V was involved in an accident near Farmington, Missouri, United States. 2 people were on board and 2 died. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

24 April 2001 at 18:45

Classification

Accident

Location

Farmington, Missouri, United States

Coordinates

37.7794, -90.4197

Aircraft

Cessna 210L

Registration

N5060V

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Gallatin → Potosi

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

CHI01FA128

2 people died.

The fracture of the crankshaft due to fatigue, the propeller separating from the airplane while in-flight, which resulted in the propeller striking the empennage structure and flight controls, yielding the airplane uncontrollable. Contributing factors to the accident were the previous damage to the crankshaft, the company/operator management disregarding the engine manufacture's service bulletin mandating an engine teardown inspection after a propeller strike event, and the inadequate inspection of the engine by the company maintenance staff.

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

Read the full NTSB narrative

While in cruise flight the engine crankshaft completely fractured and the propeller separated from the airplane subsequently striking the empennage. Witnesses reported that the airplane rolled to the right and impacted the terrain. The propeller severed the rudder control cables, the left horizontal stabilizer and elevator, and the vertical stabilizer. The engine crankshaft was fractured between the crankshaft oil seal and the propeller flange. The propeller flange remained attached to the propeller hub assembly. According to the NTSB Materials Laboratory Factual Report, "Bench binocular microscope examination of the fracture face revealed crack arrest marks typical of a fatigue cracking. The fatigue crack emanated from multiple origins at the external surface of the aft fillet radius from the propeller flange... ." The accident airplane had been involved in a propeller strike incident in which the propeller was damaged. The propeller was removed and sent for inspection and overhaul. According to the maintenance logbooks, a teardown inspection of the engine was not completed as required by Teledyne Continental Motors Service Bulletin SB-96-11. At the time of the accident the engine had accumulated 573.6 hours since the propeller strike event.

Quoted verbatim from the NTSB record.