The NTSB said Boeing previously warned plane owners in 2011 about a flawed part and that it contributed to the engine flying off a UPS plane before it crashed.

The Hawaii-bound cargo plane crashed on Nov. 4 just after takeoff in Louisville, Kentucky. #AviationSafety #NTSB #UPS

LOUISVILLE, Ky. (WDRB) -- More than two months after a UPS cargo plane crashed in Louisville, killing 15 people, cleanup continues at the crash site as families search for closure. For the first time, the media was allowed inside the site, where much of the debris has been cleared but visible reminders of the tragedy remain.

A cracked part found on a UPS MD-11 cargo jet that crashed in November in Kentucky was flagged in a Boeing service letter more than a decade earlier, the National Transportation Safety Board said on Wednesday.