LATAM Airlines conducted the first test flight of a Boeing 777-300ER on March 8, 2026, at São Paulo–Guarulhos International Airport [1, 3].
The flight serves as a critical safety verification after the aircraft experienced a significant technical failure during a previous takeoff attempt. Ensuring the airworthiness of this specific plane is essential for the airline's strategic expansion into ultra-long-haul travel.
The test occurred 21 days after a prior incident in which the aircraft aborted takeoff at a speed of more than 300 km/h [1, 2]. That abort was triggered by engine overheating, necessitating a comprehensive review of the propulsion systems before the plane could return to service [1].
LATAM is preparing the aircraft to operate what is intended to be the airline's longest nonstop commercial route. The planned distance for this record-breaking flight is 15,349 km [4]. This route will require maximum aircraft performance, and fuel efficiency to maintain safety over the vast distance.
There are conflicting reports regarding the specific aircraft model designated for the world's longest commercial flight. While LATAM is currently testing the Boeing 777-300ER for its long-haul goals [1], other reports indicate the Airbus A350-1000ULR will enable the longest commercial flight globally [1].
Technical crews at the São Paulo hub monitored the March 8 flight to verify that the overheating issues were resolved. The successful completion of this test flight marks a primary step in returning the Boeing 777-300ER to active commercial rotations [1, 3].
“The aircraft aborted takeoff at a speed of more than 300 km/h.”
The successful test flight indicates that LATAM has likely resolved the engine overheating issue that caused the high-speed abort. However, the discrepancy between the use of a Boeing 777-300ER and the Airbus A350-1000ULR for the longest global route suggests either a shift in fleet strategy or a distinction between the airline's specific record-breaking goals and the general industry benchmark for ultra-long-haul aviation.
