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NTSB Report
April 29, 2023 · Kerr John HATZ Classic · N687HZ
Ennis, MT
Overview
Report Status
Probable Cause
Event Type
Accident
Date
April 29, 2023
Injury Outcomes
No injuries (1 uninjured)
Location
Ennis, MT
Aircraft
Kerr John HATZ Classic (2009)
Tail Number
N687HZ
Injuries
None
Aircraft Damage
Substantial
NTSB Number
WPR23LA354
The pilot of the tailwheel equipped, experimental amateur-built airplane, reported that during the landing roll he decreased the airplane’s speed to exit the runway, but a ground loop ensued. He did not recall whether he inadvertently applied the heel brakes, or if the airplane encountered a wind gust. The meteorological aerodrome report located at the accident airport about the time of the accident reported that, the wind was out of 130° and the wind velocity was 4 knots. The airplane sustained substantial damage to the bottom left wing spar. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.
NTSB Probable Cause
The pilot’s failure to maintain directional control during the landing roll which resulted in a ground-loop.
Full Narrative
The pilot of the tailwheel equipped, experimental amateur-built airplane, reported that during the landing roll he decreased the airplane’s speed to exit the runway, but a ground loop ensued. He did not recall whether he inadvertently applied the heel brakes, or if the airplane encountered a wind gust. The meteorological aerodrome report located at the accident airport about the time of the accident reported that, the wind was out of 130° and the wind velocity was 4 knots. The airplane sustained substantial damage to the bottom left wing spar. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.
Flight
Event TypeAccident
Event Time18:00 MDT
Nearest AirportEnnis Big Sky (0nm E)
Runway16
Runway Length7600 ft
Runway Width100 ft
Flight Plan FiledVFR
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftKerr John HATZ Classic
Tail NumberN687HZ
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsRotec · R3600 · Reciprocating · 150
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 73 · Basc · None
Conditions
ConditionsVMC
LightDaylight
Wind130° @ 4 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point64 F / 19 F
Altimeter30.22 inHg
Observation Time17:55
Weather SourceWFAC