ERA09CA046

NTSB accident investigation · Hilderson Oswald Aventura HP · Weirwood, VA · October 31, 2008

Accident · No injuriesData collectionFinal report
Date
October 31, 2008, 14:00 local (18:00 UTC)
Place
Weirwood, VA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N1932HHilderson Oswald Aventura HP
Defining event
Approach-VFR pattern downwind: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report December 24, 2008
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20081031853119A
Case key
69422

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

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Probable cause

The pilot's failure to maintain control of the airplane following an in-flight encounter with turbulence during approach, which led to a loss of engine power due to fuel starvation, and subsequent forced landing into trees.

Findings · 3

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.

Turbulence: clear air turbulenceEnvironmental issues › Conditions/weather/phenomena · Ability to respond/compensateHilderson Oswald AV HP: 1 caseAll aircraft: 78 casesProbable cause
Engine fuel and controlAircraft › Aircraft power plant · Capability exceededHilderson Oswald AV HP: 1 caseAll aircraft: 49 cases
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotHilderson Oswald AV HP: 1 caseAll aircraft: 9,295 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

According to the pilot the weather was clear with winds from the southwest at 5 to 10 knots. He stated that after refueling, he departed for a second flight and after 20 minutes, he prepared to land. On an extended downwind leg, at 1,100 feet above ground level (AGL) and about to turn base leg, he encountered some turbulence. He increased power and got out of it, only to enter turbulence again. The airplane went into a dive and went inverted, cutting the fuel flow off to the engine. He was able to regain control and fly the airplane. However, without engine power he was gliding toward the woods. The airplane was too close to the trees, and the pilot's only option was to reduce airspeed to near stalling and mush down on the treetops. The airplane descendedinto the trees with the left wingtip on the ground and the nose 6 feet off the ground. The reported wind, at an airport about 12 miles northwest of the accident site, about the time of the accident, was from 250 degrees at 9 knots.

Factual narrative

According to the pilot of the Aventura HP experimental light sport aircraft (E-LSA) amphibian airplane, the weather was clear with winds from the southwest at 5 to 10 knots. He stated that after refueling, he departed for a second flight and after 20 minutes, he prepared to land. On an extended downwind leg, at 1,100 feet above ground level (AGL) and about to turn base leg, he encountered some turbulence. He increased power and got out of it, only to enter turbulence again. The airplane went into a dive and at one time he only saw the sky, meaning the airplane was inverted and cutting the fuel flow off to the engine. He was able to regain control and fly the airplane. However, without engine power he was gliding for the woods. The airplane was too close to the trees, and his only option was to reduce airspeed to near stalling and mush down on the treetops. The airplane then started to fall down about 30 feet and stopped with the left wingtip on the ground and the nose 6 feet off the ground. The reported wind, at an airport about 12 miles northwest of the accident site, about the time of the accident, was from 250 degrees at 9 knots.

Aircraft

Registration
N1932H
Reported as
Hilderson Oswald Aventura HP
Category
Airplane, amateur-built
Serial number
0018
Airframe hours
347.2
Engine
Rotax 503, 50 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Hilderson Oswald
Registered owner
Hilderson Oswald
Airworthiness certificate
Special, Experimental light sport (Special)
Last inspection
Continuous airworthiness · September 22, 2008 · 24.9 hours before
Departed
9VG · Weirwood, VA
Destination
9VG · Weirwood, VA
Airport
9VG · Campbell Field

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
76
Injuries
None
Certificates
Sport Pilot, Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
April 11, 2008
Seat
Single
Flight hours
377 total · 315 in this make and model · 325 as pilot in command · 7 in the last 90 days · 2 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 25 °F
Altimeter
30.47 inHg
Observed at
MFV, 12 nm away

FAA reports on this event · 1

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