ASN Wikibase Occurrence # 280484
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| Date: | Sunday 13 October 2019 |
| Time: | 15:32 UTC |
| Type: |  Rockwell Commander 112 |
| Owner/operator: | Gamma Air |
| Registration: | HB-NCB |
| MSN: | 165 |
| Year of manufacture: | 1974 |
| Fatalities: | Fatalities: 0 / Occupants: |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | 18 nm NW of Zurich Airport -
 Switzerland
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Locarno Airport (ZJI/LSZL) |
| Donaueschingen-Villingen Airport (ZQL/EDTD) | |
| Investigating agency: | STSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
In the late afternoon of 13 October 2019, a British Airways Airbus A320neo (G-TTND) with the flight plan call sign BAW14R was being vectored to the final approach by the approach sector controller of Zurich Airport.
At the same time, a Rockwell Commander 112 registered as HB-NCB en route to the airport of Donaueschingen (EDTD) on a northerly course, was to the west of Zurich Airport, at an altitude below the Terminal Control Area (TMA).
After a descent clearance to the lowest permissible altitude for an IFR flight within this sector of the Terminal Control Area, the air traffic controller became aware of an unknown aircraft on his radar display which was approaching BAW14R in a climb. Subsequently, the ground-based conflict warning system issued a warning and the air traffic controller instructed the crew of the BAW14R to turn right to a heading of 120 degrees.
The two aircraft crossed each other at a distance of 1.2 NM with a difference in altitude of 425 ft and subsequently continued their flights to their destination without further events.
Causes
The serious incident, which led to a close encounter between a commercial aircraft on approach under the radar guidance of air traffic control and a four-seater motorised aircraft flying under visual flight rules in the Terminal Control Area of Zurich Airport, is due to the fact that the pilot of the single-engine aircraft flew in a climb into the airspace of the Terminal Control Area without the approval of air traffic control.
The low vertical separation of 500 ft at the lower airspace boundary of the Terminal Control Area between the airspaces of Class E and C was determined as a factor to risk.
Accident investigation:
 |
|
Sources:
STSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 18-Jul-2022 09:33 | harro | Added |
Corrections or additions? ... Edit this accident description
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