Flight Details
On 8 January 2025, at 18:44 UTC, an Embraer ERJ190-100, registration LV-CHQ, operated by Aerolineas Argentinas, was conducting a scheduled commercial passenger flight. The aircraft had departed from Aeropuerto Internacional Dr. Fernando Piragine Niveyro (Corrientes province) at 17:24 UTC, with destination Aeroparque Jorge Newbery in Ciudad Autónoma de Buenos Aires. The flight was in the approach phase when the incident occurred, under visual meteorological conditions (VMC).
Incident Sequence
During the cruise phase, as the aircraft was about to begin its descent, the intermittent illumination of the "BLEED 2 LEEK OFF" indicator light occurred. In response, the flight crew executed the corresponding procedure from the Quick Reference Handbook (QRH). Subsequently, a strong burning odor and smoke were detected in the cockpit and part of the passenger cabin. The crew declared a PAN-PAN. The aircraft landed without further incident, and passengers disembarked normally.
Post-Flight Inspection and Maintenance
During the subsequent inspection, an air leak from the Precooler RH discharge was identified. This led to the removal of the component in accordance with Aircraft Maintenance Manual (AMM) 11 36-11.08-000-801-A. The procedure included disassembly and reinstallation of the access panels on the RH pylon, replacement of the discharge grille, and proper sealing. The Engine Pneumatic Bleed System Operational Test was completed satisfactorily. The exact source of the smoke in the cockpit could not be conclusively determined, and no critical components were found to be affected. The aircraft returned to service with no damage.