ANA Flight 1182 was en path to Toyama airport in central Japan on Saturday however needed to return to the New Chitose airport for repairs, the airline stated.
There have been no studies of accidents among the many 65 individuals on board.
The crack was discovered on one of many cockpit home windows and the trigger is underneath investigation, in accordance with native media studies.
A plug overlaying a spot left for an emergency door tore off an Alaska Airways airplane because it flew 4,800 metres above Oregon on January 5, leaving a gap within the airplane.
The FAA notified Boeing of the investigation in a letter dated final Wednesday.
“This incident ought to have by no means occurred and it can not occur once more,” the FAA stated in a press release.
Alaska and United Airways reported discovering unfastened bolts on door plugs that they inspected in a few of their different Max 9 jets.
The FAA requested Boeing to reply inside 10 enterprise days and inform the company “the foundation trigger” of the issue with the door plug and steps the corporate is taking to stop a recurrence.
