FAA Says Cause of UPS Jet’s Engine, Pylon Detachment Under Probe

The Federal Aviation Administration grounded all McDonnell Douglas MD-11 aircraft on concerns the engines and its structural wing components could fail as investigations continue into the deadly United Parcel Service Inc. crash this week.

Similar conditions that led to the fatal UPS crash “is likely to exist” in the same type of jets, the US aviation regulator said Saturday in an emergency airworthiness directive. The focus is on why freighter jet’s left engine detached during take-off. The directive prohibits any further flights until each aircraft is inspected and undergoes corrective fixes, it said.

“The agency has determined the unsafe ...