What happened
On August 4, 1999, at approximately 10:00 AM, an EMB-201A Ipanable (registration PT-GXJ) was engaged in a solo agricultural flight training mission near Itápolis, São Paulo. The pilot, a student undergoing specialized agricultural aviation qualification, was performing simulated pesticide application using water as a substitute load.
After completing an initial successful training pass, the pilot proceeded to a sugarcane field approximately 7.5 km from the Itápolis aerodrome. While performing a climbing turn (reversal maneuver) at an altitude of roughly 500 feet, the aircraft entered a stall to the right. The aircraft subsequently collided with the ground at a 45-degree angle of descent and bank. The impact caused severe structural damage to the airframe, engine, and propeller. The pilot sustained severe injuries, including fractures to the femur, nose, and vertebrae.
The investigation
CENIPA's investigation examined the pilot's training records, aircraft maintenance logs, and the operational environment. The investigation established that the pilot had recently returned to flight training after an 88-day hiatus, having performed only a 30-minute readjustment flight the day prior to the accident.
Investigators analyzed the aircraft's weight and balance, noting that while the aircraft was within operational limits, there were discrepancies regarding the liquid load; although the training phase prescribed a 200-liter water load, the aircraft was carrying significantly more. Furthermore, the investigation revealed that the flight school, E.J. Escola de Aeronáutica Civil Ltda, was operating the agricultural course without proper authorization from the Civil Aviation Institute (IAC). The investigation also noted that the aircraft was registered under the category of Specialized Aerial Services (SAE) rather than Private Instruction (PRI), making its use for this specific training legally improper.
Findings
- Inexperience and Lack of Situational Awareness: The pilot's recent long-term absence from flight activities and limited experience in agricultural operations contributed to a failure to recognize the onset of the stall.
- Overconfidence: The pilot exhibited an inadequate self-image, characterized by excessive confidence in his abilities despite instructor recommendations for further theoretical and practical training.
- Deficient Instruction and Supervision: The flight school failed to provide adequate oversight, allowing a student with identified training needs to proceed with advanced maneuvers after a significant training gap.
- Improper Operational Procedures: The use of excessive liquid loads beyond the prescribed training limits and the unauthorized operation of the training course increased the operational risk.