Serious incident to the Airbus A320 registered VT-ITR and operated by Indigo on 10/12/2018 at Calcutta [Investigation led by AAIB / India]

Preliminary data based on the notification from the Indian authorities:

While descending through FL 170, the flight crew got ECAM warning for ‘LAVATORY SMOKE’. At FL 100, the ‘AVIONICS SMOKE’ warning triggered and went off. 'May Day' was declared and aircraft made an emergency landing at Kolkata at 2210 Hrs.