FlightFollowerNight Medevac Positioning Flight Breaks Up Over the Ocean off Maui
Accident facts and aircraft context
On 15 December 2022, a twin-engine Raytheon C90A operating a medical positioning mission departed Kahului Airport bound for Waimea-Kohala Airport.
Purpose of the flight
Part 91 air-ambulance positioning flight.
Flight sequence and key events
Thirteen minutes after departure, a critical instrument failure occurred.
The vertical gyro malfunction caused the primary attitude display to go dark and forced an automatic autopilot disengagement—leaving the pilot to manually control the aircraft using limited standby instruments in total darkness with no visible horizon.
Air traffic control remained unaware of the degraded cockpit situation and continued issuing routine instructions while the aircraft’s bank angle, descent rate, and airspeed progressively increased—classic indicators of spatial disorientation.
Within minutes, the aircraft rolled beyond controllable limits and entered a rapid descending spiral.
The pilot’s final recorded words—Hang on—were followed seconds later by the sound of structural separation, consistent with an in-flight breakup before impact with the ocean.
The aircraft, flown by a single airline transport pilot for Guardian Flight LLC, entered dark night conditions over the Pacific Ocean during what should have been a routine twenty-minute flight.
Investigation findings
The investigation by the National Transportation Safety Board found no mechanical failure that would have prevented normal flight.
Instead, the evidence revealed deeper systemic concerns: • Repeated pilot training deficiencies and failed proficiency checks • Inadequate operator performance monitoring and oversight • Failure to follow sterile cockpit discipline during climb • No emergency declaration after loss of primary attitude reference • Dark night over-water conditions conducive to spatial disorientation Investigators concluded the probable cause was the operator’s inadequate training oversight, which allowed a pilot with demonstrated performance weaknesses to continue flying critical night medical missions—ultimately resulting in loss of control after instrument failure and a fatal in-flight breakup.
The medevac breakup should be reported through the confirmed aircraft movements and communications first. The available evidence does not justify filling gaps in the investigation with a speculative technical cause.
What the record establishes
Guardian Flight’s inadequate pilot training and performance tracking, which failed to identify and correct the pilot’s consistent lack of skill and resulted in his inability to maintain position in flight using secondary instruments after the electronic attitude director indicator failed, leading to spatial disorientation and subsequent loss of control. Contributing factors included the lack of a visible horizon during dark-night overwater conditions and the pilot’s failure to declare an emergency.
Research and reconstruction
Flight Follower Editorial Team
This reconstruction was researched from official investigation records where they exist, the original air traffic control recording, and contemporary reporting. The aircraft movement, timeline and written account were assembled independently by Flight Follower. Where an investigation is open or no probable cause has been published, the account says so rather than offering one.
About the Flight Follower team · Editorial policy · Corrections
- Incident date
- 15 December 2022
- Aircraft / registration
- Raytheon C90A King Air
- Investigation status
- Investigation / ATC reconstruction record