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NTSB accident investigation · Aerospool WT9 Dynamic LSA · Orbe, Switzerland · August 16, 2025

Accident · FatalClass 4 · Foreign
Date
August 16, 2025, 12:56 local (12:56 UTC)
Place
Orbe, Switzerland
Injuries
1 fatal
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
HB-WZNAerospool WT9 Dynamic LSA
Defining event
Enroute-cruise: Collision with terr/obj (non-CFIT)
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
General Aviation Accidents
Lead agency
Other
Parties
STSB, Swiss TSB
Case key
201049

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

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.

Not determinedNot determined › Not determined · Other authority investigatedAll aircraft: 2,247 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.

Aircraft

Registration
HB-WZN
Reported as
Aerospool WT9 Dynamic LSA
Category
Airplane
Engine
Rotax 912 ULS2, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Non-U.S., non-commercial
Airport
LSGY