Sunday, September 10, 2017

Super Cub, N13NV: Accident occurred July 22, 2013 in Hoonah, Alaska

Aviation Accident Final Report - National Transportation Safety Board: https://app.ntsb.gov/pdf 

Analysis

The commercial pilot was landing a tailwheel-equipped, experimental, amateur-built airplane on a soft, remote tidal beach. Friends familiar with the circumstances of the accident said that, while landing at the beach, the pilot inadvertently touched down faster than anticipated. During the landing roll on the soft beach, the pilot applied heavy braking, and the airplane subsequently nosed over. A Federal Aviation Administration inspector who examined the airplane after recovery reported no preimpact mechanical problems with the airplane that would have precluded normal operation. 

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's selection of an unsuitable off-airport landing site and his subsequent landing at too high of an airspeed, which resulted in his excessive use of brakes during the landing roll and resulted in a nose-over. 

Findings

Aircraft
Landing gear brakes system - Incorrect use/operation (Cause) 

Personnel issues
Decision making/judgment - Pilot (Cause)
Use of equip/system - Pilot (Cause)

Environmental issues
Terrain - Decision related to condition (Cause)

Additional Participating Entity: Federal Aviation Administration / Flight Standards District Office; Juneau, Alaska

Aviation Accident Factual Report - National Transportation Safety Board: https://app.ntsb.gov/pdf

Investigation Docket - National Transportation Safety Board: https://dms.ntsb.gov/pubdms

http://registry.faa.gov/N13NV

NTSB Identification: ANC13LA089
14 CFR Part 91: General Aviation
Accident occurred Monday, July 22, 2013 in Hoonah, AK
Aircraft: HOWARD M. SHEPHERD SUPERCUB, registration: 
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

On July 22, 2013, about 1948 Alaska daylight time, a tundra tire, tailwheel-equipped, Howard M. Shepherd Supercub experimental amateur-built airplane, N13NV, nosed over during landing on a remote tidal beach at Freshwater Bay, Chichagoff Island, about 15 miles east-southeast of Hoonah, Alaska. The commercial pilot was not injured, and the airplane sustained substantial damage. The personal flight was operated under the provisions of 14 Code of Federal Regulations Part 91 with no flight plan filed. The flight departed Juneau International Airport, Juneau, Alaska, at an undetermined time.

A Federal Aviation Administration (FAA) operations inspector assigned to the Juneau Flight Standards District Office examined the airplane after its recovery and reported that it sustained substantial damage to the rudder, left wing spar, and both wing lift struts. In addition, the FAA inspector reported that there were no preaccident mechanical anomalies with the airplane that would have precluded normal operation.

The FAA inspector also reported that friends of the pilot that were familiar with the circumstances of the accident said that while the accident pilot was landing at the remote beach site, he inadvertently touched down slightly faster than anticipated on the soft beach. During the landing roll the pilot applied heavy braking, and the airplane subsequently nosed over on the soft beach terrain. 

The pilot did not respond to numerous telephone and mail requests, and no NTSB Form 6120 was received.

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