WPR11LA461

NTSB accident investigation · Bunker RLV-1 · Wells, NV · September 22, 2011

Accident · Serious injuriesLimited investigationFinal report
Date
September 22, 2011, 08:30 local (15:30 UTC)
Place
Wells, NV
Injuries
1 serious, 1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N49SBunker RLV-1
Defining event
Maneuvering: Controlled flight into terr/obj (CFIT)
Weather
Visual (VMC) · Day
Status
Completed · report March 8, 2012
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20110922022529A
Case key
81871

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 did not maintain clearance from terrain while maneuvering. Contributing to the accident was the pilot’s inadequate in-flight planning.

Findings · 4

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: altitudeAircraft › Aircraft oper/perf/capability · Not attained/maintainedBunker Kenneth J RLV-1: 1 caseAll aircraft: 1,310 casesProbable cause
Terrain: mountainous/hilly terrainEnvironmental issues › Physical environment · Ability to respond/compensateBunker Kenneth J RLV-1: 1 caseAll aircraft: 329 cases

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 pilot reported that his passenger wanted to take pictures of a mountain range about 5 miles from the departure airport. As the airplane neared the mountain range, which consisted of rolling tree-covered hills, the pilot turned into a valley. Proceeding up the valley, he realized that the airplane did not have sufficient altitude to outclimb the rising terrain and that turning around was not an option due to the higher terrain on both sides of the valley. The airplane subsequently impacted a 15-foot high tree, entered an uncontrolled descent, and impacted terrain, resulting in substantial damage to the wings and fuselage. The pilot stated that the accident could have been prevented had he gained altitude prior to entering the area of rising terrain. He reported that there were no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Factual narrative

On September 22, 2011, about 0830 Pacific daylight time, a Bunker RLV-1 experimental amateur built airplane, N49S, was substantially damaged following an impact with terrain while maneuvering about five miles southwest of the Wells Municipal Airport (LWL), Wells, Nevada. The certified private pilot sustained serious injuries and the passenger received minor injuries. Visual meteorological conditions prevailed for the local area flight, which was conducted in accordance with 14 Code of Federal Regulations Part 91, and a flight plan was not filed. The flight departed LWL about 0800. In a report submitted to the National Transportation Safety Board investigator-in-charge (IIC), the pilot reported that his passenger wanted to take pictures of some nearby mountains, which were located about 5 miles southwest of LWL. The pilot stated that as the airplane approached the rolling hills near the higher mountains he made a right turn into a draw, but the airplane was then unable to climb above the rising terrain, which consisted of rolling hills populated with cedar trees. The pilot added that at this point he was unable to turn around due to higher terrain on both sides of the airplane. The pilot revealed that the airplane subsequently impacted a cedar tree about 15 feet high, and as the airplane descended to the ground it impacted at least two more trees before coming to rest upright substantially damaging the wings and fuselage. The pilot stated that the accident could have been prevented had he gained altitude prior to entering the area of rising terrain. The pilot reported that there were no anomalies with the airplane prior to or during the flight.

Aircraft

Registration
N49S
Reported as
Bunker RLV-1
Category
Airplane, amateur-built
Serial number
2
Airframe hours
817
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Michael D. Erikson
Registered owner
Wells Propane Inc.
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · September 10, 2010 · 3 hours before
Departed
LWL · Wells, NV
Destination
LWL · Wells, NV

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
58
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
June 5, 2011
Flight hours
1,664 total · 25 in this make and model · 1,577 as pilot in command · 25 in the last 90 days · 13 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
54 °F, dew point 30 °F
Altimeter
30.29 inHg
Observed at
EKO, 38 nm away

Docket · 3

The files NTSB released with the investigation on January 20, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 432 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.