Cessna A185F N185KB

Summary

On 1 August 2018 at about 07:00 local time, a Cessna A185F registered N185KB was involved in an accident near White Mountain, Alaska, United States. 4 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

1 August 2018 at 07:00

Classification

Accident

Location

White Mountain, Alaska, United States

Coordinates

64.5667, -163.5686

Aircraft

Cessna A185F

Registration

N185KB

Category

Airplane

Year built

1979

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Council → Nome

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

ANC18LA059

Nobody was injured.

A partial loss of engine power for reasons that could not be determined because postaccident examination of the engine revealed no mechanical malfunctions or failures 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 private pilot was conducting a cross-country flight when he demonstrated a momentary zero-G maneuver, shortly after which the engine lost partial power. The pilot was unable to restore engine power and subsequently conducted a forced landing to tundra covered terrain, during which the airplane nosed over, resulting in substantial damage. Postaccident examination of the airframe and engine revealed no anomalies that would have precluded normal operation; however, one engine exhaust valve exhibited signatures consistent with uneven excessive heat exposure, but no mechanical failure of the valve, therefore would not have resulted in a loss of power. It is unlikely that a momentary zero G maneuver would result in a partial power loss that could not be restored.

Quoted verbatim from the NTSB record.