ERA16LA010

NTSB accident investigation · Murray Blair L Free Bird Classic · Kylertown, PA · October 12, 2015

Accident · FatalLimited investigationFinal report
Date
October 12, 2015, 18:35 local (22:35 UTC)
Place
Kylertown, PA
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Approach
Aircraft
N176FBMurray Blair L Free Bird Classic
Defining event
Approach-VFR pattern final: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report May 1, 2017
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20151012018939A
Case key
92157

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 sufficient airspeed during approach for landing, which resulted in an inadvertent aerodynamic stall/spin. Contributing to the accident was the pilot’s lack of flight experience in the accident airplane make and model.

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.

Performance/control parameters: airspeedAircraft › Aircraft oper/perf/capability · Not attained/maintainedMurray Blair L FREE BIRD CLASSIC: 1 caseAll aircraft: 1,681 casesProbable cause
Performance/control parameters: angle of attackAircraft › Aircraft oper/perf/capability · Not attained/maintainedMurray Blair L FREE BIRD CLASSIC: 1 caseAll aircraft: 990 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 private pilot/owner had recently completed the experimental, amateur-built airplane and was conducting the first test flight. The pilot had completed two circuits around his private airstrip before witnesses saw the airplane approaching to land. While on final approach about 50-100 ft above the ground, the airplane suddenly descended and impacted terrain. Of the three witnesses who saw the accident, two stated that the airplane nosed over to ground contact, and one stated that the left wing dropped before the airplane nosed over. Two other individuals heard the engine "rev up" before impact but did not observe the accident. The airplane impacted terrain short of the runway in a nearly vertical, nose-down attitude and sustained extensive damage to the engine, fuselage, wings, and empennage. The tail of the airplane was twisted and bent forward over the fuselage, and there did not appear to be any forward momentum of the airplane at impact, consistent with an aerodynamic stall/spin. The witness accounts of the airplane's nose or wing dropping were also consistent with entry into a stall/spin. Given that the accident flight was the pilot's first flight in the airplane, he was likely unfamiliar with its flight characteristics, and, during the approach for landing, the pilot allowed the airspeed to decay. The airplane subsequently exceeded its critical angle of attack and entered an aerodynamic stall/spin.

Factual narrative

On October 12, 2015, at 1835 eastern daylight time, an experimental amateur-built Free Bird Classic airplane, N176FB, was destroyed while maneuvering to land at the pilot's private airstrip near Kylertown, Pennsylvania. The private pilot was fatally injured. The airplane was registered to and operated by the pilot as a 14 Code of Federal Regulations (CFR) Part 91 personal flight. Visual meteorological conditions existed near the accident site at the time of the accident, and no flight plan was filed. The flight originated from the private airstrip about 1815.The pilot's son stated that his father had recently built the airplane and this was his first flight. Several witnesses heard the airplane flying circuits around the private airstrip. One witness said the airplane was preparing to land and was about 50 ft above the ground in a level flight attitude when it suddenly nosed over. The witness did not see the impact but heard the crash and immediately responded to the site. Another witness said the airplane made two circuits around the airstrip and was coming into land. While on final approach in a level attitude, at an altitude of about 100 ft above the ground, the right wing suddenly "flipped up" about 90 degrees and the airplane descended toward the ground. The witness did not see the impact, but heard the engine rev up just before the airplane hit the ground. Other witnesses also heard the engine rev up before impact. The airplane came to rest on a road in a steep, nose-down attitude about 500 yds short of the runway. There was no post-impact fire. A review of photos taken by law enforcement shortly after the accident revealed the cockpit and fuselage were crushed, and both wings and the empennage were damaged. The empennage, including the tail control surfaces, were twisted and bent forward over the fuselage. A Federal Aviation Administration (FAA) inspector performed a postaccident examination of the wreckage. He stated that the left wing, engine, and the right wing fuel-tank had separated from the airframe and the right wing was "torn apart" which prohibited a complete examination of the flight control system. There were no flight-data recording avionics installed in the airplane. A review of the maintenance logbooks revealed that the FAA issued the airplane a special airworthiness certificate on August 27, 2015. At that time, the airplane had "0" hours. The 83-year old pilot held a private pilot certificate for airplane single-engine land and was a certified repairman, experimental-aircraft builder. A review of his logbook revealed he had a total of 682 flight hours and had completed a flight review with a flight instructor on September 16, 2015. The pilot's last FAA third-class medical certificate was issued in 2005. An autopsy was conducted by the J.C. Blair Memorial Hospital Laboratory. The cause of death was reported as blunt force trauma. The FAA's Civil Aerospace Medical Institute performed forensic toxicology testing on specimensfrom the pilot, and the results were negative for all items tested. Weather reported at Clearfield-Lawrence Airport (FIG), Clearfield, Pennsylvania, about 17 miles west of the accident site at 1855, was wind variable at 5 knots, visibility 10 miles, and clear skies.

Aircraft

Registration
N176FB
Reported as
Murray Blair L Free Bird Classic (Lite Sport)
Category
Airplane, amateur-built
Serial number
42014
Built
2014
Airframe hours
0
Engine
Hirth 3203, 65 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · August 27, 2015 · 1 hours before
Departed
NONE · Kylertown, PA
Destination
NONE · Kylertown, PA
Airport
NONE · Private
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
83
Injuries
Fatal
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3
Last flight review
September 16, 2015
Seat
Left
Restraint
4-point
Toxicology
Performed
Flight hours
682 total · 1 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 5 knots
Visibility
10 statute miles
Temperature
64 °F, dew point 46 °F
Altimeter
29.68 inHg
Observed at
FIG, 17 nm away

Docket · 6

The files NTSB released with the investigation on March 30, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.5 MB 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.