What happened
On July 10, 2014, an Aero Boero AB-115, registration PP-FAZ, was performing a local instructional flight at the Montenegro Aerodrome (SSNG) in Rio Grande do Sul, Brazil. The aircraft was operated by Aeroclube de Montenegro with an instructor and a student pilot on board.
During the takeoff roll, which was being conducted by the student, the aircraft experienced a leftward yaw after the tail lifted. The instructor attempted to take control to correct the directional deviation, but was unable to recover the aircraft's path. Consequently, the aircraft exited the left side of the runway, struck a ditch, and overturned. The impact caused substantial damage to the engine, propeller, wings, empennage, and fuselage. Both occupants of the aircraft were unharmed.
The investigation
CENIPA's investigation identified several critical failures regarding flight training protocols and pilot knowledge. Investigators found that the crew lacked necessary theoretical preparation, specifically regarding the aircraft's Maximum Takeoff Weight (MTOW).
Furthermore, the investigation revealed a deviation from established training standards. According to the Private Pilot Course Manual (MCA 58-3), the specific stage of flight training being performed required the instructor to execute the takeoff while the student observed, to ensure the student reached the required level of comprehension. Instead, the student performed the maneuver. The investigation also noted a lack of adequate management supervision by the flight club.
Findings
- Ineffective application of flight controls by the student pilot due to limited flight experience.
- Inadequate instructional supervision and a lapse in following prescribed training sequences.
- Lack of theoretical knowledge regarding the aircraft's weight limits.
- Deficiencies in management oversight by the flight school.