NTSB Says UPS Didn’t Act After 2011 Boeing Letter on Defect

A US safety investigator said United Parcel Service Inc. decided not to take action after 2008 and 2011 service letters from Boeing Co. flagged cracking in a key structural component in the type of plane that crashed in Louisville, Kentucky, last year.

“Investigators found that UPS had reviewed the service letters and determined no further action was required,” said Chihoon Shin, the investigator in charge for the UPS accident. The comments came on the first day of a two-day investigative hearing into the UPS tragedy, which killed 15 people on the aircraft and on the ground.

According to Shin, Boeing ...