Overview
- Investigators confirm Dennis Dutton flew from the left seat and his son Jack sat right seat without second‑in‑command qualification, while Dennis lacked the single‑pilot type rating for the Citation 550.
- During taxi the crew discussed an inoperative thrust‑reverser indicator and a rear passenger noted the left engine showing more power than the right, as the right‑seat occupant’s attempts to open the IFR flight plan were unsuccessful due to controller workload.
- Cockpit audio captured the left‑seat pilot reporting a faulty altitude indicator and other left‑side flight instruments, engine ITT differences were noted, and control briefly shifted to the right seat before the left‑seat pilot resumed and configured for landing with gear lights unlit.
- CVR and GPS recordings stopped at 10:15:23 a.m.; the first impact was with runway 28 MALSR light stations about 1,380 feet from the threshold, with a debris path and heavy charring to the main wreckage short of the runway.
- No pre‑impact structural separation was found as a post‑impact fire consumed much of the fuselage; the seven victims included Greg Biffle, his wife Cristina, children Emma and Ryder, associate Craig Wadsworth, and the two pilots, with the final report expected in 12–18 months.