Incident Details
On December 10, 2018, an Indigo Airbus A320 aircraft was descending through flight level 170 (FL170) toward Kolkata Airport (CCU) in India when the flight crew received an Electronic Centralized Aircraft Monitor (ECAM) warning indicating 'Lavatory Smoke'. In response, the crew declared an emergency and subsequently landed successfully at the airport.
Findings
Following the landing, an inspection of the aircraft revealed that the number 2 (right) engine was low by approximately 13 quarts of oil. A ground run of the engine was conducted, which determined that the engine itself was the source of the unusual odor and smoke that had been noted. Further examination via borescope inspection identified wear on the number 3 bearing compartment seal within the engine.
Investigation
The Government of India has been notified of the incident, and the National Transportation Safety Board (NTSB) has appointed a U.S. Accredited Representative to assist in the investigation. This representative is serving as the state of manufacturer of the engine under the provisions of ICAO Annex 13. All investigative information will be released by the Government of India.