Ramp Oversight Under Scrutiny: July 29 Lawsuit Claims Biffle Jet Was Unfit to Fly on December 18

The legal fight surrounding the December 18, 2025 jet crash that killed Greg Biffle, members of his family, and two others has taken a sharper turn with a new lawsuit filed on July 29, 2026. This filing doesn’t revisit the cockpit debates that have dominated earlier claims. Instead, it rewinds the timeline to the ramp and asks whether the aircraft should have ever left the ground that morning.

The suit, brought by Margaret Stephanie Dutton, widow of pilot Dennis Dutton, argues that the Cessna Citation 550 was not airworthy on December 18 and that GB Aviation Leasing LLC failed to complete the inspections that would have exposed that. She also names Jordyn Biffle Carpenter, administrator of Greg Biffle’s estate, asserting shared responsibility for releasing the jet for flight.

Her complaint centers on a sequence of irregularities that began before the wheels ever rolled. A cockpit indicator behaving unpredictably. Engine readings that didn’t match and a flight control system that never stabilized once the jet was airborne.  Landing‑gear lights that never confirmed what the pilots needed to know. In her view, these weren’t isolated glitches. They were symptoms of a jet already slipping out of its operational envelope before the crew realized how little margin remained.

This July 29 filing arrives months after another lawsuit entered the record on March 14, 2026, when Nicole Biffle, Greg’s ex‑wife and mother of Emma, alleged negligence tied to checklist discipline, warning‑light interpretation, and the decision to attempt a low‑altitude return despite mounting system failures. The suit aims to discover what happened during the final moments of the flight.

Together, the two complaints now form a split narrative. The first argues the aircraft was compromised before takeoff. The other argues the crew made critical errors once the problems surfaced. Both point toward the same unresolved hinge point: what conditions existed on the ramp on December 18, 2025, and why did the jet depart at all?

The final NTSB report, which is expected later this year, will likely determine the definitive cause of the crash, answering questions that have been looming for months. Until then, the latest lawsuit shifts the focus back to the very beginning, before the engines spooled up, before the jet began its takeoff roll, and before the pilots committed to the sky. It revives the same question that has lingered since the morning of the crash: What allowed this aircraft to take off?