Transcript for Pilots who safely landed Southwest flight remember moment they knew there was trouble 
 
 Tickets you where you were about what altitude. When you first new. We're passing through about 32003. When and we. A large. And rapid decompression. Aircraft dogs and thanks laughs a little more than a little over forty degrees. And we have a very severe vibration from the number one engine. It's. Checking everything. And that'll come happen no one's. My first thoughts are actually hoe here we go just because it seems like. A flashback to some of the navy from thing that we had done. That and really. Dare and resisted it very easy to communicate with and we had to use hand signals and because it was loud and there was. It was just hard to communicate for a lot of different reasons. 
 
 This transcript has been automatically generated and may not be 100% accurate. ||||| The pilots of the Southwest Airlines jet that suffered a midair engine explosion had to use hand signals to communicate because of the deafening roar, they said in a new interview. 
 
 The explosion, which happened near Philadelphia on a Dallas-bound flight from LaGuardia Airport, led to part of the engine shattering a window and a passenger being partially sucked out of the plane. Jennifer Riordan, 43, a Wells Fargo banking executive from New Mexico, later died. 
 
 Co-pilot Darren Ellisor recalled a chaotic scene where everything suddenly went wrong. 
 
 “We were passing through about 32,000 feet when we heard a large bang and a rapid decompression,” Ellisor says in the ABC “20/20” clip. “The aircraft yawed and banked to the left a little over 40 degrees and we had a very severe vibration from the number one engine. There was shaking, everything. And that all kinda happened all at once.” 
 
 Pilot Tammie Jo Shults said the trouble reminded her of rough military flights. 
 
 “My first thoughts were actually, ‘Oh, here we go’ — just because it seemed like a flashback to some of the Navy flying that we had done,” she said. 
 
 And in the panic, the two aviators couldn’t even hear each other as they tried to land the plane – a harrowing ordeal which took 22 minutes from the time the engine blew until they touched down in Philadelphia. 
 
 “Darren is just very easy to communicate with and we had to use hand signals because it was loud and it was just hard to communicate for a lot of different reasons,” Shults said. ||||| The pilots behind the controls of a Southwest flight that turned deadly in April when an engine failed midair, talked to ABC News recently about the moment they knew there was a problem aboard the plane. 
 
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 "We were passin' through about 32,000 feet when we had a, a large bang and a rapid decompression. The aircraft yawed and banked to the left, a little over more, a little over 40 degrees and we had a, a very severe vibration from the No. 1 engine that was shaking everything. And, that all kind of happened all at once," First Officer Darren Ellisor told ABC News' Martha Raddatz in an exclusive interview. 
 
 YOU CAN WATCH ABC NEWS' FULL INTERVIEW ON "20/20" FRIDAY AT 10 P.M. 
 
 ABC News 
 
 On April 17, Southwest Flight 1380 experienced engine failure about 20 minutes after takeoff from New York City's LaGuardia International Airport en route to Dallas Love Field. There were 144 passengers and five crew members onboard. 
 
 Passenger Jennifer Riordan, 43, of Albuquerque, New Mexico was partially sucked out of a window on the jet near the failed engine and later died. 
 
 Ellisor, 44, was flying the plane that day in April with Capt. Tammie Jo Shults, 56, an experienced pilot with Southwest Airlines and one of the Navy's first women pilots trained to fly fighter aircraft. She safely landed the plane in Philadelphia. 
 
 ABC News 
 
 "My first thoughts were actually, 'Oh, here we go.' Just because it seems like a, a flashback to some of the Navy flying that we had done," Shults said. "We had to use hand signals because it was loud. And, there was, it was just hard to communicate for a lot of different reasons." 
 
 Obtained by ABC 
 
 The National Transportation Safety Board said Thursday that it was apparently a fragment of the engine cowling, not a fan blade, that had struck the window of the Southwest plane, resulting in depressurization of the aircraft and Riordan's death. 
 
 In a letter to passengers obtained by ABC News, Southwest offered sincere apologies as well as a $5,000 check and the promise of a $1,000 travel voucher. The letter also stated that the airline’s primary focus now is to assist the passengers who were aboard the flight in every way possible.
– It's been nearly a month since a frightening Southwest flight that ended in the death of one passenger, and now the pilot with "nerves of steel" and her co-pilot are finally offering their takes. In a short clip promoting a longer 20/20 interview set to air Friday, pilot Tammie Jo Shults and Darren Ellisor, her co-pilot on April 17's Flight 1380 from New York City to Dallas, explain to ABC News' Martha Raddatz what happened during what the New York Post calls a "harrowing" 22 minutes, from initial explosion to setting down in Philly. It all started with a "large bang and a rapid decompression," Ellisor recalls, noting that "the aircraft yawed and banked to the left … a little over 40 degrees and we had a very severe vibration from the No. 1 engine that was shaking everything." The instant thoughts that zipped through Shults' mind: "'Oh, here we go.' Just because it seems like a flashback to some of the Navy flying that we had done." She adds that the din was so deafening that she and Ellisor were forced to communicate via hand signals as they tried to land the plane. Fortunately, "Darren is just very easy to communicate with," she says. The passenger who died during the emergency was 43-year-old Jennifer Riordan, a Wells Fargo exec from New Mexico.