False fire alarm forces IndiGo pilots to declare emergency mid-air, land back at Chennai airport

Just 15 minutes after the departure, the pilots observed a fire alarm and immediately relayed the emergency code 7700 to all Air Traffic Controls, said a source privy to the development. The fire alarm was later found to be because of faulty smoke detectors in cargo compartment. The plane had more than 160 passengers.

from Transportation-Industry-Economic Times https://ift.tt/2N8dBFv