Yeah, until you know why it happened it's probably a good idea... Its not exactly common for a engine to JUST FALL OFF. Archive: https://archive.today/PEGEu From the post: >>UPS and FedEx said they are grounding their fleets of McDonnell Douglas MD-11 planes “out of an abundance of caution” following a deadly crash at the UPS global aviation hub in Kentucky. The crash Tuesday at UPS Worldport in Louisville killed 14 people, including the three pilots on the MD-11 that was headed for Honolulu. MD-11 aircrafts make up about 9% of of the UPS airline fleet and 4% of the FedEx fleet, the companies said. “We made this decision proactively at the recommendation of the aircraft manufacturer,” a UPS statement said late Friday. “Nothing is more important to us than the safety of our employees and the communities we serve.”