India's Directorate General of Civil Aviation (DGCA) issued the order Monday to investigate the locking feature on the fuel control switches of several Boeing models including 787s and 737s.

Air India CEO confirms all Boeing 787 aircraft checked post-crash, no mechanical issues found, urges against premature conclusions.

All mandatory maintenance tasks, including the pilots clearing the pre-flight breath analyser, had been completed, preliminary report identified no “mechanical or maintenance issues with the aircraft or engines,