NTSB searches for answers on Denver plane incident

A Boeing 777 with 241 people on board experienced catastrophic engine failure before performing a successful emergency landing.
3:11 | 02/22/21

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Transcript for NTSB searches for answers on Denver plane incident
We begin tonight with breaking news new developments in that moment of terror over Denver. Late today the FAA ordering immediate or stepped up inspections of Boeing 770 sevens after an engine exploded just after take off. Passengers on united flight 328 describe the terrifying minutes the Boeing triple seven with 241. People on board. The right engine of the plane in flames. Parts of that engine missing. Passengers say they thought they were going to die huge chunks of debris raining down on a neighborhood below people on the ground running for cover. United now says it will temporarily remove some of the planes from its fleet out of an abundance of caution. At least one country overseas already grounding airplanes ABC's GO Benitez covers aviation and lead to some. This with the terrifying site at thirteen thousand feet. A triple sevens engine blown apart the pilots immediately calling a May Day. Committee district. That regard it has turned immediately. Now tonight we're seeing new images from inside united flight 328 bound for Hawaii. Some of the 231. Passengers on board now telling their story. The plane was shaking pretty hard her. They didn't Scott. On the ground people watching in horror and daughter alone and hand them. Oh hundreds of witnesses calling 9113. Yard debris blowing everywhere that we're getting atomic calls. Massive pieces of metal falling into neighborhoods below. This piece landing in Kirby Clemens front lawn crushing his truck. We've heard this crashing boom. And then saw this big silver piece just roll right in front of the front of the window here where I stood up. And actually got to look at I go now last front of the jet engine off from an airplane. People seen on camera running from falling debris from. Not a single injury on the ground or on the play but tonight questions over what went wrong. Anytime we see this kind of failure with that kind of damage that you see in this video of the end to the engine. It's always suspected that one of those fan blades let loose. And now we see video that shows clearly that one of those fan blades right up in the front of the engine is broken off halfway up. A person familiar with the situation telling ABC news. NTSB investigators will focus on what they call a possible uncontained engine failure where pieces of the engine fly out. A rare occurrence we saw in 2018. With a southwest flight. A passenger was killed when she was partially sucked out a window. Such terrifying moments in GOP needs has joins us now Joseph what more can you tell us about those inspections. Lindsay that order is now calling for immediate or stepped up inspections. But just moments ago United Airlines the only US airline using this specific engine has now decided to take 44 of its triple sevens. Out of service Lindsay. GO thanks so much.

This transcript has been automatically generated and may not be 100% accurate.

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