What happened
On January 26, 2015, a Piper PA-25-235, registration CX-BRZ-R, was engaged in agricultural spraying operations near Villa Ansina, Uruguay. The aircraft was operating from an improvised, unpaved runway measuring approximately 530 meters in length, characterized by tall grass and located near the Joaquín Lencina aerodrome.
During the takeoff phase, the aircraft was carrying a load of 350 kg of urea and 80 liters of fuel. As the pilot attempted to lift off, the aircraft struggled to gain sufficient altitude. The left wing struck a post of a perimeter fence located at the end of the runway, which destabilized the aircraft. The impact caused the aircraft to strike the ground, resulting in a broken left landing gear strut and further damage to the wing structure. The pilot evacuated the aircraft safely and sustained no injuries.
The investigation
The CIAIA investigation examined the aircraft's maintenance records, the pilot's credentials, and the environmental conditions at the time of the accident. The investigation confirmed that the aircraft's airworthiness certificate was valid and that all maintenance was performed according to regulations. The weight and balance calculations showed the aircraft was operating within its permitted limits.
Investigators also evaluated the runway conditions, noting the high grass and the presence of obstacles such as eucalyptus trees and fencing. The investigation focused on the interplay between the high ambient temperatures, the decreasing atmospheric pressure, and the operational decision-making regarding the takeoff attempt.