Pratt & Whitney

Federal safety officials are updating their investigation into the engine failure on a United Airlines plane that sent parts of the engine housing raining down on Denver-area neighborhoods last month

The Federal Aviation Administration on Tuesday ordered airlines in the United States to ground planes with the type of engine that blew apart after takeoff from Denver this past weekend until they can be inspected for stress cracks.

Boeing has recommended that airlines ground all of 777s with the type of engine that suffered a catastrophic failure over Denver this weekend

The jetliner engine fire that forced an emergency landing in Colorado and flooded social media with dramatic cellphone video and aerial images on Saturday has prompted federal regulators to step up inspections and Boeing to advise airlines to ground impacted planes.  The damaged United Airlines flight, a Boeing 777, quickly landed safely. It was en route to Hawaii from Denver…