Air India has found no fault with the fuel switches of its Boeing fleet, the airline said on Tuesday, adding to mounting evidence that the pilots killed in the crash were to blame.

Air India says precautionary inspections have found no issues on the locking mechanism of fuel control switches for select Boeing aircrafts.

A cockpit recording of dialogue between the two pilots of the Air India flight that crashed last month supports the view that the captain cut the flow of fuel to the plane's engines, said a source briefed on U.