India, Aug. 12 -- Aviation regulator Directorate General of Civil Aviation (DGCA) has issued a show cause notice to IndiGo for using "non-qualified simulators" to train 1,700 pilots operating to three airports, citing scrutiny of records and email replies from the airline.

"...it has been found that Category C (Critical) airfield training for flight crew (approximately 1700 (PIC & First Officers) was conducted using non-qualified simulators," said the notice, a copy of which HT has seen, issued on Monday.

It said the review of the simulator training data showed several Full Flight Simulators (FFSs) used for training, testing, or checking for airfields such as Kozhikode, Leh, and Kathmandu were not qualified or approved for the specific ...