What happened
On 21 April 2019, a BRM Land Africa, registration CS-UTN, was performing a local flight at Letterkenny Airfield in Co. Donegal. While on final approach to Runway 25, the pilot encountered significant crosswind conditions. To maintain the runway centerline, the pilot utilized a crabbed approach. As the aircraft descended to approximately eight feet above the runway, the pilot applied full right rudder to align the aircraft but was unable to counteract the wind.
Following a strong gust, the pilot initiated a go-around maneuver. During this transition, the aircraft's left wing struck the ground, causing it to pivot. The aircraft then impacted a boundary fence and came to rest nose-first in a drainage ditch. The pilot, who was the sole occupant, escaped the substantial damage to the aircraft without injury.
The investigation
The AAIU examined the meteorological conditions, aircraft maintenance records, and pilot licensing. Investigators noted that wind speeds at the time were between 10-15 knots, with gusts reaching 25-30 knots. The investigation also reviewed the regulatory status of the aircraft and the pilot's credentials. It was established that the aircraft had been in Ireland for approximately nine months without the required notification to the Irish Aviation Authority (IAA) for aircraft staying longer than 28 days. Additionally, while the pilot held a valid UK PPL(A), the Portuguese authorities (ANAC) indicated this specific license was not acceptable for operating this ultralight aircraft type.
Findings
- The aircraft was operating in crosswind conditions that approached and, during gusts, exceeded the manufacturer's recommended maximum landing limit of 20 mph.
- During the go-around, the combination of engine power application, low airspeed, and strong gusts likely induced a left roll.
- The left wing tip struck the ground, causing the aircraft to lose control and strike the perimeter fence.
- The aircraft's registration, CS-UTN, was subject to specific Irish regulatory notification requirements that had not been met.