The harrowing final moments of gospel group The Nelons before their fatal plane crash are detailed in a new report.

The final moments of the July 26 plane crash that resulted in the deaths of members of gospel group The Nelons were revealed in a preliminary report.

On August 28, the National Transportation Safety Board released its report on the fatal crash that occurred a month earlier, on July 28, and claimed the lives of six plane passengers, including the pilot, as well as three members of the Gospel Music Association Hall of Fame quartet.

The pilot declared an emergency and attempted to regain control of the aircraft after losing autopilot, as described by witnesses who also reported on the moments leading up to and following the crash.

"A witness near the accident site reported hearing a 'loud whining noise' that decreased and then increased, followed by smoke emanating from the area. Meanwhile, another witness observed the airplane overhead in a 'barrel roll' maneuver and heard the airplane's engine 'roaring loud' until they heard the airplane impact terrain. The witness stated that they saw the smoke in the area shortly after."

According to Autumn Nelon Streetman, Kelly Nelon Clark, her husband Jason Clark, and their daughter Amber Nelon Kistler passed away in a crash.

"She thanked those who had already prayed for her, her husband, Jamie, their unborn baby boy, and Jason's parents, Dan and Linda Clark, expressing their appreciation for continued prayers, love, and support as they face the upcoming days."

According to Nelon Streetman, Amber's husband Nathan Kistler, assistant Melodi Hodges, pilot Larry Haynie, and his wife Melissa were also killed in the crash.

Autumn safely arrived in Seattle to join her parents and sister on the Gaither Homecoming Cruise in Alaska.

The preliminary report on the July 26 crash stated that the information was "subject to change." According to National Transportation Safety Board spokesperson Keith Holloway, a final report on the probable cause of the crash could take up to two years to complete.

Dr. Alan Diehl, a former NTSB, FAA and U.S. Air Force Crash Investigator, Aviation Psychologist and author of, "Requiem for Camelot," described to Planet Chronicle Digital what the passengers on the fatal flight may have experienced prior to the single-engine Pilatus PC-12/47E turboprop airplane crashing.

"John F. Kennedy Jr. falling from the sky is typically described as a scene of dark terror in my novel," Diehl said. "I stated that it was the end, but the screaming was based on the assumption that he and his two passengers were in terror as the plane plummeted to the ground, similar to this one."

"In this scenario, you are aware of the actual breakup, but we are unaware of it. The possibility of the plane losing pressurization is also uncertain. If the breakup happened early enough and they lost pressurization, they may have been unconscious or semi-conscious at the end. This would be a merciful outcome, as they would say it was God's mercy."

Planet Chronicle Digital's Tracy Wright contributed to this report.