NEW DELHI (Reuters) -The head of Boeing Commercial Airplanes, Stephanie Pope, met the chairman of Air India on Monday in India, two sources said, as the companies seek to find the cause of last week's fatal crash involving a Boeing 787 Dreamliner.

A helicopter crashed in the northern Indian state of Uttarakhand on Sunday, killing seven people on board. Local officials said the aircraft was flying from the town of Kedarnath to Guptkashi, which is a prominent Hindu pilgrimage site in the Himalayas.

Air India's Chairman N. Chandrasekaran on Monday told staff that last week's plane crash that killed at least 271 people should be a catalyst to build a safer airline, urging employees to stay resolute amid any criticism.

The Air India flight fell from the sky on Thursday and killed at least 270 people in Gujarat state, officials said Saturday.

Residents of the building have said they owe their lives to Captain Sumeet Sabharwal and co-pilot Captain Clive Kunder.

Officials said they had found the cockpit voice recorder that may provide crucial clues about what caused the Air India flight to crash, killing at least 270 people.

An Air India Boeing 787, the same kind of plane that crashed 4 days earlier, was forced to turn around after a midair "technical issue," the airline says.