Investigation found the aircraft leased by Aurigny, with 52 people on board, flew at 70 feet above the runway in poor visibility, before climbing away.
The serious incident was logged with the Air Accidents Investigation Branch a day after it happened, which was 12 August 2024.
Their investigation was complicated as the cockpit voice recorder had been overwritten, because it had been used for a certain number of hours since the incident.
The Lithuanian Jump Air ATR 72-500, registered as LY-JUP, was wet leased by Aurigny, meaning it was flown by Jump Air pilots.
The incident happened at 8.42 in the morning, as the aircraft was returning to Guernsey from Southampton with 52 passengers and five crew on board.
Investigators found that the pilots knew that visibility was an issue that morning. They also found that the crew knew about the 'approach ban.' This prohibits a plane descending below 1,000 feet above the runway if visibility is below the required limit. The AAIB says this was not discussed by the two pilots.
After circling and waiting for the visibility to improve, the aircraft made its approach into Guernsey from the east.
This continued until the co-pilot called for a go around. This is when the approach is aborted and the plane made to climb quickly.
The AAIB found that communication between the commander and co pilot had been confused, although they had to go on personal recollection, not the recorded conversations.
After the go around was called, the ATR flew at between 60 and 80 feet above the runway at Guernsey Airport, with its undercarriage down, and nose at 7 degrees, as if it were in level flight.
This continued for 15 seconds until it started to accelerate and climb off towards the west coast.
Neither pilot spoke English as a first language. As a result of the serious incident, Jump Air has made improvements to its pilot selection procedures and training.
It has also introduced Flight Data Monitoring, where real information from flights is interpreted and used to improve safety.
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