ANC13LA089

NTSB accident investigation · Howard M. Shepherd Supercub · Hoonah, AK · July 23, 2013

Accident · No injuriesLimited investigationFinal report
Date
July 22, 2013, 19:48 local (Jul 23, 2013, 03:48 UTC)
Place
Hoonah, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N13NVHoward M. Shepherd Supercub
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report October 17, 2017
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA - Juneau FSDO
FAA report
20130722018169A
Case key
87917

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

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 · 6

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: airspeedAircraft › Aircraft oper/perf/capability · Incorrect use/operationShepherd Howard M SUPERCUB: 1 caseAll aircraft: 1,681 casesProbable cause
Landing gear system: landing gear brakes systemAircraft › Aircraft systems · Incorrect use/operationShepherd Howard M SUPERCUB: 1 caseAll aircraft: 92 casesProbable cause
Performance/control parameters: surface speed/brakingAircraft › Aircraft oper/perf/capability · Incorrect use/operationShepherd Howard M SUPERCUB: 1 caseAll aircraft: 238 casesProbable cause
TerrainEnvironmental issues › Physical environment · Decision related to conditionShepherd Howard M SUPERCUB: 1 caseAll aircraft: 267 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

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.

Factual narrative

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.

Aircraft

Registration
N13NV
Reported as
Howard M. Shepherd Supercub
Category
Airplane, amateur-built
Serial number
AK18103
Built
2011
Engine
Lycoming O-360-C2A, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Departed
JNU · Juneau, AK
Destination
Hoonah, AK
Equipment
Unknown

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
68
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Seat
Front
Flight hours
700 total · 1 in the last 90 days · 1 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
290° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 54 °F
Altimeter
30.03 inHg
Observed at
JNU, 50 nm away

Docket · 2

The files NTSB released with the investigation on August 29, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 380 KB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.