India's Aircraft Accident Investigation Bureau (AAIB) is yet to decide whether flight data and cockpit voice recorders from the Air India flight that crashed last Thursday will be sent overseas for decoding and analysis.

The move came a day after Indian officials told the airline to improve its operations, and as delays and canceled flights are drawing complaints from passengers.

India's aviation regulator has warned Air India for breaching safety rules after three of its Airbus planes flew despite being overdue checks on emergency equipment, and for being slow to address the issue,