WPR24LA216

NTSB accident investigation · Alexander Schleicher ASH 31 MI · Parowan, UT · June 24, 2024

Accident · Serious injuriesClass 4 · LimitedFinal report
Date
June 24, 2024, 11:55 local (17:55 UTC)
Place
Parowan, UT · Open field near airport
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N517PBAlexander Schleicher ASH 31 MI
Defining event
Enroute: Loss of lift
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
Case key
194591

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 glider’s encounter with atmospheric conditions where the lift was not sufficient to maintain?flight.

Findings · 1

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.

Temp/humidity/pressure: thermal liftingEnvironmental issues › Conditions/weather/phenomena · Effect on operationAlexander Schleicher ASH 31 MI: 1 caseAll aircraft: 53 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 pilot of a powered glider reported that, after the engine had been shut down and the propeller stowed, he encountered more downdrafts?than expected. The glider did not have sufficient altitude to reach the airport or to re-deploy the engine. During the forced landing on rough terrain, a wing impacted vegetation and ground looped, resulting in substantial damage to the fuselage and empennage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the powered glider that would have precluded normal operation.

Aircraft

Registration
N517PB
Reported as
Alexander Schleicher ASH 31 MI
Category
Glider
Serial number
31175
Built
2018
Airframe hours
567
Engine
Austro Engine AE50R, 55 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Ketcham James S and Barbara S Trustee
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · November 9, 2023
Departed
1L9 · Parowan, UT
Airport
1L9 · Parowan Airport, runway 04, 5,000 × 75 ft, asphalt
Equipment
Data recorder, Electronic primary flight display

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
74
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
March 27, 2024
Seat
Single
Flight hours
2,000 total · 500 in this make and model · 2,000 as pilot in command · 40 in the last 90 days · 20 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
290° at 9 knots
Visibility
10 statute miles
Temperature
90 °F, dew point 45 °F
Altimeter
30.15 inHg
Turbulence
Light
Observed at
KCDC, 16 nm away
METAR
KCDC 241753Z AUTO 29009KT 10SM FEW100 32/07 A3015 RMK AO2 SLP113 T03220067 10328 20206 58006

Docket · 3

The files NTSB released with the investigation on August 8, 2024, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.2 MB in all.