Russell was a "ramper," btw, not a mechanic. Here is an excerpt from newspaper story:
At 7:15 p.m., he arrived in a tow vehicle to the cargo area at the far north end of Sea-Tac’s airfield and climbed aboard Horizon Air Q400 four minutes later. Russell began the “sequence to start aircraft,” at 7:22 p.m., causing its propellers to start turning.
Over the next few minutes, Russell exited the plane and used the tow vehicle to turn its nose toward the airfield. He then pulled it away from its parked location at 7:32 p.m., with the aircraft taking off one minute later.
For the next hour and 13 minutes, Russell piloted the plane, at times pulling off several aerobatic stunts during the unauthorized flight, before crashing into the woods on the island in South Puget Sound at 8:46 p.m.
During a rambling, recorded conversation with ground control during the flight, Russell described himself as a “man in crisis,” but also calmly chatted about Mount Rainier’s beauty and how to find an orca that for days had garnered national attention while carrying its dead calf in Puget Sound.
The flight shut down airport traffic, prompted two F-15 fighter jets in Portland to break the sound barrier while scrambling to the scene and drew dozens of witnesses to call 911.
It also left pilots and other aviation experts speculating as to how Russell, a low-paid ground-services employee with no apparent pilot experience, knew how to fly the 76-seat passenger turboprop plane and pull off the aerial maneuvers.
The investigation didn’t find that Russell had received any formal flight training.
“However, investigators learned that Russell was familiar with the checklist of actions for starting an airplane,” according to the FBI’s statement. “Investigators were also aware of internet searches Russell performed for flight instructional videos. Investigators did not uncover any conclusive evidence to suggest further, informal flight training.”
As a ramp agent, Russell was a properly credentialed employee of Horizon Air and “did not appear to have violated any security measures or protocols until the theft of the plane,” the FBI found. “As part of his responsibilities as a ground-crew member, Russell had knowledge regarding the operation of the aircraft’s auxiliary power unit (APU) and familiarity with tow equipment and maneuvering.”
Described by friends as a quiet, friendly jokester, Russell worked for Horizon for nearly four years as a ground agent who handled baggage and tidied and de-iced planes. At times, he shared complaints with colleagues about their grueling work and low pay.
“I never thought I would work as a ground service agent,” Russell wrote in one social-media posting. “It seemed like such miserable work and I never could imagine why anyone would want to subject themselves to all the constant noise, gas fumes, and heavy lifting … I would like to dedicate this blog to the life of a ‘ramper’ and highlight the remarkable contrast between our work and rest.”