What happened
On February 25, 2007, an EMB-721C, registration PT-ERV, was performing a local flight from the Ultraleve Clube de Curitiba aerodrome in São José dos Pinhais, Brazil. During the takeoff roll, immediately after rotation and the retraction of the landing gear, the aircraft experienced a sudden deviation to the left and a loss of altitude.
The pilot attempted to regain control using the rudder, but was unable to maintain the takeoff centerline. Consequently, the pilot decided to force the aircraft back to the ground. The aircraft landed on the left side of the runway, sliding approximately 22 meters before colliding with a perimeter fence. The impact caused severe damage to the aircraft's nose, wings, fuselage, and propeller. The pilot and one passenger sustained minor injuries.
The investigation
CENIPA investigators analyzed meteorological data from the nearby Afonso Pena airport (SBCT). The records showed significant fluctuations in wind direction and intensity around the time of the accident. While the pilot estimated a 60-degree wind at 8 knots during alignment, subsequent reports indicated a shift toward 110 degrees and higher speeds. The presence of Cumulonimbus (CB) clouds in the area was also noted.
The investigation focused on whether windshear or a sudden crosswind contributed to the loss of control. Investigators also examined the pilot's pre-flight procedures, noting that the pilot had not consulted the latest METAR or TAF reports prior to departure, as the flight was intended to be a short, local VFR operation.
Findings
- Inadequate flight planning: The pilot failed to consult available meteorological information before takeoff, which would have revealed the potential for deteriorating weather conditions and the presence of convective activity.
- Adverse meteorological conditions: A significant change in wind direction and intensity likely contributed to the difficulty in maintaining the takeoff path.
- Pilot performance: The investigation noted the possibility of improper control inputs in response to the crosswind, as well as the uncertainty regarding whether the decision to abort the takeoff was the most appropriate course of action given the circumstances.