An All Nippon Airways flight was forced to turn back to its departure airport after a crack was discovered in a cockpit window of the Boeing 737 aircraft.

The plane was headed to Toyama Airport but reverted to New Chitose Airport outside Sapporo, Japan, after a crack showed up in the outermost of the four layers of the cockpit window. No injuries or other problems were reported among the 59 passengers and six crew members on board.