Widebody Transport
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Ground Event / Encounter Other / Unknown; Ground Excursion Taxiway; Inflight Event / Encounter Weather / Turbulence
General None Reported / Taken
Airport
Upon arrival; [the] airport was experiencing rapid and severe weather disruptions. Moderate turbulence; extremely high winds at low altitude; and rapidly changing wind direction and speed. We changed intended landing runway 4 times in the airport traffic pattern; were radar vectored at 5000 ft for approximately 30 minutes before vectors to final. On final approach; we noted a 70 knot tailwind at approximately 3000 ft and a 27 knot tailwind/crosswind on final at approximately 1500 ft. Winds and aircraft buffeting did not improve so a go around was commanded. We decided to divert to LIT because of the rapidly deteriorating conditions at [other alternates]. Landing at LIT was uneventful. Taxiing at LIT is extremely difficult due to poor lighting; extremely narrow taxiways; extremely narrow taxiway fillets; and wet surface conditions. We were given a very long and circuitous taxi routing due to poorly or inadequately stressed taxiways. Including several greater than 90 degree turns on narrow taxiways with little or no fillets.
Was made aware that the LIT airport notified the company that during taxi one of our main gear departed the taxiway. After a [very long] flight; a go around due to wind shear and a diversion to LIT; we were faced with taxiing around LIT with much narrower taxiways than what I'm used to seeing. We discussed and thoroughly briefed out two taxi events. One after landing to our parking spot and another to reposition the aircraft to a different location after refueling. All 4 crew members were involved in each taxi event to assure the safest route possible. I have no idea where on the airport or at what point the aircraft main departed the taxiway.Certainly; fatigue and general airport unfamiliarity were factors in this event. We were at 20+ hrs of duty when we repositioned the aircraft after refueling. The fatigue certainly was a factor that caused the human error on the taxi event.My only recommendation would be maybe better training for the first officers to assist the captain during taxi on narrow taxiways.
Air Carrier flight crew reported being notified of a taxiway excursion after a long duty day.