GAA18CA015

NTSB accident investigation · Thomas G Parkhurst Kitfox IV · Sidney, NY · October 18, 2017

Accident · Minor injuriesData collectionFinal report
Date
October 18, 2017, 17:15 local (21:15 UTC)
Place
Sidney, NY
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N37TPThomas G Parkhurst Kitfox IV
Defining event
Approach-VFR pattern final: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report February 21, 2018
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA/ FSDO
FAA report
20171018014879A
Case key
96214

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 exceedance of the airplane’s critical angle of attack following a loss of ground reference during landing in glaring sun conditions, which resulted in an aerodynamic stall/spin.

Findings · 5

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: angle of attackAircraft › Aircraft oper/perf/capability · Capability exceededThomas G Parkhurst KITFOX IV: 1 caseAll aircraft: 990 casesProbable cause
Performance/control parameters: airspeedAircraft › Aircraft oper/perf/capability · Not attained/maintainedThomas G Parkhurst KITFOX IV: 1 caseAll aircraft: 1,681 casesProbable cause
Light condition: glareEnvironmental issues › Conditions/weather/phenomena · Effect on personnelThomas G Parkhurst KITFOX IV: 1 caseAll aircraft: 109 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, during final approach, the airplane was "out of alignment to the left edge of the runway." He decided to add throttle and realign with the runway, but as he reached for the throttle to add power, at that instant, he was "blinded" by sun glare, and he had "no memory of [the] events for approximately 6 seconds" after that point. He added that, just before impact, he saw the ground, but "there was nothing that could be done." The airplane impacted a parking lot in a nose-low, left-wing-down attitude. The airplane sustained substantial damage to the fuselage, empennage, and both wings. During a telephone conversation with the National Transportation Safety Board investigator-in-charge, the passenger reported that, during landing, the airplane was crabbing to the left but traveling forward. He reported that, before the runway threshold, there was a momentary sun flash that "lit up the plastic windscreen." He further reported that the pilot applied power, pulled back on the control stick, and the airplane "spiraled" and "twisted" left and downward into a parking lot. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. It is likely that the pilot exceeded the airplane's critical angle of attack and then entered an aerodynamic stall/spin.

Factual narrative

The pilot reported that, during final approach, the airplane was "out of alignment to the left edge of the runway." He decided to add throttle and realign with the runway, but as he reached for the throttle to add power, at that instant, he was "blinded" by sun glare and he had "no memory of [the] events for approximately 6 seconds" after that point. He added that, just prior to impact, he saw the ground but "there was nothing that could be done." The airplane impacted an open parking lot in a nose low, left wing down attitude. The airplane sustained substantial damage to fuselage, empennage, and both wings. During a telephone conversation with the National Transportation Safety Board investigator-in-charge, the passenger reported that during landing the airplane was crabbing to the left, but traveling forward. He reported that prior to the runway threshold, there was a momentary sun flash that "lit up the plastic windscreen." He further reported that, the pilot applied power, pulled back on the control stick, and the airplane "spiraled" and "twisted" left and downward into a parking lot. The pilot did not report that there were any preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Aircraft

Registration
N37TP
Reported as
Thomas G Parkhurst Kitfox IV (NO SERIES)
Category
Airplane, amateur-built
Serial number
ASC-199
Built
2014
Airframe hours
81
Engine
Rotax 912, 80 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · May 2, 2017
Departed
N23 · Sidney, NY
Destination
N23 · Sidney, NY
Airport
N23 · Sidney Muni, runway 25, 4,201 × 75 ft, asphalt
Equipment
None

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
Minor
Certificates
Sport Pilot, Recreational, Flight instructor
Airplane ratings
Single-engine land
Medical
Sport pilot
Last flight review
July 8, 2017
Seat
Left
Restraint
4-point
Flight hours
394 total · 90 in this make and model · 302 as pilot in command · 13 in the last 90 days · 13 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
220° at 4 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 43 °F
Altimeter
30.22 inHg
Observed at
KBGM, 25 nm away

Docket · 3

The files NTSB released with the investigation on January 25, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.1 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.