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Engine debris rained over a mile across a Denver suburb. Now Boeing recommends suspending its 777s with that engine

February 22, 2021. Summarized by summa-bot.

Compression ratio: 23.4%. 1 min read.

Kieran Cain was playing basketball with his kids Saturday afternoon at an elementary school in greater Denver when he heard what sounded like a sonic boom and looked up.

The National Transportation Safety Board (NTSB) said Sunday an initial examination of the Pratt & Whitney PW4077 engine from United Airlines Flight 328 showed that two fan blades were fractured and the remaining blades exhibited damage "to the tips and leading edges. "

Boeing has recommended suspending the use of 777s that have a Pratt & Whitney 4000 engine, and United Airlines has already pulled them following the incident.

In a statement issued Sunday, Boeing recommended suspending operations of Boeing 777s that use the same engine as the Denver flight -- a Pratt & Whitney 4000.

"While the NTSB investigation is ongoing, we recommended suspending operations of the 69 in-service and 59 in-storage 777s powered by Pratt & Whitney 4000-112 engines until the FAA identifies the appropriate inspection protocol," Boeing said.

Japan's transportation ministry said it has ordered the country's domestic airlines to halt operations of Boeing 777 aircraft equipped with Pratt & Whitney PW4000 engines.

"Pratt & Whitney is actively coordinating with operators and regulators to support the revised inspection interval of the Pratt & Whitney PW4000 engines that power Boeing 777 aircraft," the statement from the company said.

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