IndiGo, Air India and Air India Express on Saturday started carrying out software upgrade of A320 family planes to address a potential flight control issue, and requisite modifications have been done for 100 per cent of the affected 338 aircraft, an exercise that also resulted in delays and some flight cancellations.
According to the latest data from the aviation regulator DGCA, IndiGo and Air India did not cancel any flights, while Air India Express cancelled four flights due to the system modification process.