The priority with an explosive pressurization event is for the crew to don their oxygen masks and then rapidly bring the airplane down to an initial habitable breathing altitude of 10,000 feet, using flight control devices on top of the wings called speed brakes, which are created to reduce lift.
A photo taken Tuesday inside the cabin of the plane heading from NY to Dallas shows passengers with oxygen masks on, but experts pointed out some of them weren't wearing them correctly. The seven other victims suffered minor injuries. "In Albuquerque, that was Jennifer Riordan", Avitia wrote in online post. She later succumbed to her wounds and died.
"I looked at her eyes and she basically gave me the approval to go back there...."
"I think there should have been a more urgent order", said former NTSB chair Mark Rosenker. Tim McGinty, he was my big guy.
While some flight attendants may have a bit of fun by customizing their announcements, that can distract passengers from the message, Cochran said.
"So I had clicked my seat belt back on and I was going to get something out of my bag".
Sumwalt said the fan blade, after suffering metal fatigue where it attached to the engine hub, suffered a second fracture about halfway along its length. Sumwalt said the crack was not detectable from the outside.
Completing the latest investigation will take about 12 to 15 months, he said.
Though Southwest CEO Gary Kelly said Tuesday night that the plane in question had undergone an inspection two days before the explosion, he said was not fully aware of the nature of that inspection or whether it included a specific inspection of that engine.
Mackey said she and others are experiencing survivor guilt, especially because the airline allows passengers to pick their own seats.
"She has nerves of steel".
'The little girl with her itty bitty hands tried to help me, ' Mackey remembered. "The last thing she told me was, "I'm proud of you", Muffoletto said.
She told air traffic control: "So we have part of the aircraft missing, so we're going to need to slow down a bit".
"She was out of the plane".
A career firefighter, 34-year-old Needum and another passenger worked to pull the woman back into the cabin.
American Airlines said fan blades in the engines that were of concern had been swapped out with those in similar engines. In a statement on its website, the company said: "The CFM56-7B engine powering this aircraft has compiled an outstanding safety and reliability record since entering revenues service in 1997 while powering more than 6,700 aircraft worldwide".
"If somebody raps the safety demo, then maybe that's why some people aren't putting their masks over their noses", he said. The directive will require an ultrasonic inspection of fan blades when they reach a certain number of takeoffs and landings.
A Southwest Airlines 737-700 CFM56 engine of the same model suffered an uncontained failure in 2016 over the Gulf of Mexico, leading the Federal Aviation Administration in 2017 to issue an airworthiness directive requiring ultrasonic inspections of certain CFM56 engines. He said the scope of FAA action will depend on whether investigators find fatigue in other fan blades on the broken engine.
In the meantime, several experts with knowledge of commercial airline disasters said that Southwest will likely lead the charge to work with passengers and their families.
The plane from NY to Dallas landed in Philadelphia. (The cowl is the surrounding enclosure, analogous to an automobile's hood.) The current speculation is that metal fatigue from one of the numerous fan blades that rotate at incredibly high RPM was the culprit.