HONOLULU (HawaiiNewsNow) -A United Airlines plane that had to make an emergency landing as it flew to Hawaii last month was about 37,000 feet in the air before its engine cover ripped off, according to a preliminary report by the National Transportation Safety Report.

At around noon on Feb. 13, the Honolulu-bound flight from San Francisco, Calif. experienced an “in-flight separation of a fan blade and subsequent loss of the inlet and fan cowls of the right engine” while descending into the Daniel K. International Airport, the report said.