Citation V/Ultra/Encore (C560)
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Training / Qualification; Situational Awareness; Distraction
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown; Ground Excursion Taxiway
General Flight Cancelled / Delayed
Airport; Human Factors; Weather
Taxiing to runway; at night in a poorly lit GA [General Aviation] airport after days of rain; I looked away from centerline for a second. Looking back to centerline; I noticed I was right and began correcting when the right main vacated the taxiway and pulled the airplane more to the right and lodged itself; right main and nose gear in the very soggy sod. I shut down the engines; secured the aircraft; and went outside to access that the aircraft is stuck and unable to free itself; being lodged in the saturated sod. We unloaded the passengers and luggage and secured the airplane for further assessment. Poorly lit airport and no centerline taxiway lighting coupled with wet windshield resulting in very limited visibility. Keep both pilots eyes up in and out at all times to monitor with caution.
As the Captain was taxiing to the runway; he failed to maintain the centerline; which caused the right main tire to go into the mud. This caused the airplane to become stuck which pulled the nose wheel into the mud as well. The visibility was not great and there was mist which made it difficult to see the centerline.
CE560 Captain reported while taxiing at poorly lit airport; right main landing gear vacated taxiway causing aircraft to become lodged in wet sod. Passengers deplaned and aircraft secured for further assessment.