CubCrafters CC11-100 N620Y

Summary

On 19 June 2013 at about 16:40 local time, a CubCrafters CC11-100 registered N620Y, operated by Walla Walla University, was involved in an accident near Dillingham, Alaska, 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

19 June 2013 at 16:40

Classification

Accident

Location

Dillingham, Alaska, United States

Nearest airport

Dillingham Airport (PADL)

Coordinates

59.0717, -158.0394

Aircraft

CubCrafters CC11-100

Registration

N620Y

Category

Airplane

Engines

1

Operator

Walla Walla University

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Anchorage → Dillingham

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

ANC13CA056

Nobody was injured.

A loss of engine power due to carburetor icing.

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

Read the full NTSB narrative

The airplane departed with 24 gallons of usable fuel, which normally allows for 4.5 hours of flight. About 2.5 hours into the flight, the engine started running rough. The pilot confirmed the mixture was rich and the carburetor heat was on. About 5 minutes later the engine quit and the pilot executed a forced landing to an area of tundra-covered terrain, substantially damaging the undercarriage, fuselage, and left wing strut. A postaccident examination by a Federal Aviation Administration inspector revealed that the carburetor had separated from the engine during the forced landing, and the gascolator drain had tundra embedded in it. The pilot stated that he had turned the fuel selector to the OFF position about 30 minutes after the landing.  The carburetor icing chart indicated the possibility of serious carburetor icing at the reported atmospheric conditions. The Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25A) states that first indication of carburetor ice in an airplane with a fixed-pitch propeller is a decrease in engine rpm. Additionally, it states that when conditions are conductive to carburetor icing that carburetor heat should be applied immediately and should be left ON until the pilot is certain all the ice has been removed. If ice is present applying partial heat or leaving heat on for an insufficient time might aggravate the situation. Postaccident examination of the airframe and engine revealed no preimpact mechanical malfunctions or failure that would have precluded normal operation.

Quoted verbatim from the NTSB record.