Beechcraft B36TC N471BB

Summary

On 25 July 2012 at about 13:50 local time, a Beechcraft B36TC registered N471BB was involved in an accident near Sugar Grove, Illinois, 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

25 July 2012 at 13:50

Classification

Accident

Location

Sugar Grove, Illinois, United States

Nearest airport

Aurora Municipal Airport (ARR)

Coordinates

41.7719, -88.4756

Aircraft

Beechcraft B36TC

Registration

N471BB

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Sugar Grove → Oshkosh

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

CEN12LA481

Nobody was injured.

The partial loss of engine power for reasons that could not be determined because postaccident testing and examination did not reveal any anomalies that would have precluded normal operation.

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

Read the full NTSB narrative

The pilot reported that shortly after takeoff, the airplane’s engine lost partial power and shook violently. The pilot elected to land the airplane in a cornfield off the end of the runway, where the it sustained substantial damage to both wings. A postaccident engine run performed with the engine still mounted on the airframe revealed no anomalies, but full-power testing could not be performed due to shortening of the propeller blades to facilitate the test. A mechanic who performed work on the engine after the accident reported that the turbocharger was full of oil and that the shaft appeared to be loose. As a result, the turbocharger was replaced with an overhauled unit. The mechanic also reported that the mechanical fuel pump was replaced after the accident but prior to arrival at the engine repair facility. It was reportedly replaced to correct a lean mixture condition, but the mechanic could not verify the reason. Based on the available information, the reason for the engine's partial loss of power could not be determined during the course of the investigation.

Quoted verbatim from the NTSB record.