Beechcraft C90 N2057C

Summary

On 9 February 2011 at about 19:30 local time, a Beechcraft C90 registered N2057C, operated by Aero Sim Flight Academy, was involved in an incident near Evansville, Indiana, United States. 4 people were on board and nobody was injured. The aircraft was slightly damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

9 February 2011 at 19:30

Classification

Incident

Location

Evansville, Indiana, United States

Nearest airport

Evansville Regional Airport (EVV)

Coordinates

37.9697, -87.5665

Aircraft

Beechcraft C90

Registration

N2057C

Category

Airplane

Engines

2

Operator

Aero Sim Flight Academy

Operating rule

Part 91: General Aviation

Purpose of flight

Instructional

Phase of flight

Not recorded

Route

Champaign/Urban → Orlando

Aircraft damage

Minor

Weather

VMC

Light

Day

NTSB number

CEN11IA180

Nobody was injured.

The peel chip-type failure of the co-pilot's window during initial climb.

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

Read the full NTSB narrative

During the initial climb after takeoff, the inner ply of the co-pilot’s windshield in the pressurized turboprop airplane shattered. The remainder of the windshield was not shattered. The pilot diverted and landed without further incident. Microscopic examination of the windshield's crack initiation area revealed an expanding triangular or v-shaped area emanating from a single point, consistent with a peel chip. The peel chip-type fracture of the inner ply of glass has historically been an issue on the King Air windshield and the window manufacturer made a product improvement to it. The windshield improvement incorporated a urethane layer between the vinyl interlayer and the inner glass ply that relieves stresses on the inner glass ply and prevents peel chip fractures. This airplane did not have the improved windshield. To date, there has not been a peel chip type fracture with the improvement in place.

Quoted verbatim from the NTSB record.