What happened
On November 30, 2022, at 15:20 UTC, an Air Canada flight, operating as AC090, was performing a scheduled commercial operation from São Paulo/Guarulhos International Airport to Ministro Pistarini International Airport (Ezeiza). While the aircraft, a Boeing 777-333ER with registration C-FNNU, was executing its final approach to Ezeiza, the crew received a wind shear warning.
In response to the atmospheric instability, the flight crew initiated a missed approach procedure. To ensure the safety of the aircraft and its occupants, the decision was made to divert the flight to Rosario International Airport in the Santa Fe province.
The investigation
The investigation focused on the meteorological conditions encountered during the approach phase at SAEZ and the subsequent operational response. The aircraft, which had a maximum permissible mass of over 272,000 kg, experienced wind shear during the critical landing phase, necessitating the diversion to an alternate aerodrome.
Findings
- The primary factor leading to the diversion was the detection of wind shear during the final approach to the destination.
- The crew successfully executed the necessary escape maneuvers to maintain aircraft stability.
- The aircraft sustained no injuries to the crew or passengers, and the damage to the aircraft was classified as minor.