Date:	Sunday 4 June 2023
Time:	18:15
Type:	Cessna 501 Citation I/SP
Owner/operator:	Mali Air Luftverkehr
Registration:	OE-FMK
MSN:	501-0144
Fatalities:	Fatalities: 0 / Occupants: 2
Other fatalities:	0
Aircraft damage:	None
Category:	Serious incident
Location:	St. Gallen-Altenrhein Airport (ACH/LSZR) -   Switzerland
Phase:	Take off
Nature:	Unknown
Departure airport:	St. Gallen-Altenrhein Airport (ACH/LSZR)
Destination airport:	Graz-Thalerhof Airport (GRZ/LOWG)
Investigating agency:	STSB
Confidence Rating:	Information verified through data from accident investigation authorities

Narrative:
A Cessna 501 Citation I/SP (OE-FMK) and a Zlin Z526ASM (HB-TRQ) were involved in a serious incident at St. Gallen-Altenrhein Airport (ACH), Switzerland.
The two aircraft began their takeoff run simultaneously, the business jet on runway 10 and the single-engine Zlin aircraft on the opposite runway 28. The Zlin took off early from the runway and overflew the oncoming Cessna jet. The jet also took off from the runway a little later.
Runway 10/28 has a length of 1455 m.

Weather reported about the incident time (c. 1615Z)
LSZR 041620Z AUTO 10007KT 070V130 9999 NCD 23/10 Q1016

STSB

Date/time	Contributor	Updates
17-Jul-2023 09:55	harro	Added
17-Jul-2023 10:00	harro	Updated