Revised Flight Duty Norms: Two major airlines IndiGo and Air India have told aviation regulator DGCA that the revised flight duty norms for pilots can be implemented only in a phased manner starting from June next year, according to sources. Revised Flight Duty Norms: Two major airlines IndiGo and Air India have told aviation regulator DGCA that the revised flight duty norms for pilots can be implemented only in a phased manner starting from June next year, according to sources. Zee News :Business