Event Details

Title:Near-miss, Aircraft Incident at Lappeenranta TMA, Finland on 29 July 1999
Micro summary:A near-miss between a Saab 340 and a glider.
Event Time:1999-07-29 at 1600 local
File Name:1999-07-29-FI.pdf
Publishing Agency:Finland Accident Investigation Board (AIB)
Publishing Country:Finland
Report number:C 16/1999 L
Site of event:Lappeenranta TMA at an altitude of 4000 feet MSL.
First AirplaneSecond Airplane
Departure:Helsinki-Vantaa Airport, Helsinki, FinlandLappeenranta Airport, Lappeenranta, Finland
Destination:Lappeenranta Airport, Lappeenranta, FinlandLappeenranta Airport, Lappeenranta, Finland
Airplane Type(s):Saab 340BSZD-50-3 Puchacz
Flight Phase:DescentClimb
Type of flight:RevenuePrivate
Serious Injuries:00
Other Injuries:0
Executive Summary:On Thursday July 29, 1999 at 16.00 local time an aircraft incident took place at Lappeenranta TMA at an altitude of 4000 feet MSL. A Saab 340B aircraft OH-FAF, call sign Finnair 585, owned by Finnair and operated by Swedish Flying Enterprise Ab flying a scheduled flight for Finnair, and a private twin-seated glider SZD-50-3 Puchacz OH-772 on a local flight, passed each other onintersecting flight paths so near that the captain of OH-FAF made an avoiding action by pulling the aircraft from descent to climb. According to the report of OH-FAF the distance between the aircraft was around 100 metres. The pilot of OH-772 did not see the other aircraft at the moment of passing. There were altogether 22 persons on board.

3.2 Probable cause
The pilot of the glider OH-772 flew in the area south of the highway 6, which was near the extended centreline of runway 06. The clearance given entitled him to do so. According to the current local instruction, he should have moved outside the approach funnel because of arriving IFR traffic. He did not do that, however, and so he got into the flight path of Finnair 585 without seeing it. The air traffic controller did not check the actual location of OH-772. The pilot of OH-772 received information from ATC concerning Finnair 585ís estimated time of arrival, but not its approach direction and altitude. So he had an incorrect image of the location of the passenger aircraft, and tried to find it in the wrong direction.

A contributing factor was the cloud layer at 5000 feet, which prevented the glider pilot from seeing the passenger aircraft before it had descended below clouds. The sharp lookout of the crew of Finnair 585 and its immediate avoiding action prevented the impending collision.

An additional factor was that the local orders of Lappeenranta airport did not contain any regulation concerning local flight operations and training sectors within the airspace around the airport.
Learning Keywords:Operations - Airspace - Air Proximity
Operations - Airspace - Air Traffic Control


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