Small Transport; Low Wing; 2 Recip Eng
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Ground Event / Encounter Loss Of Aircraft Control; Ground Excursion Taxiway; Inflight Event / Encounter Loss Of Aircraft Control
Aircraft Aircraft Damaged; Flight Crew Regained Aircraft Control
Aircraft; Human Factors; Weather
After the First officer made an uneventful landing; at taxi speed just before I was going to take over the controls in the right turn on to taxiway B; the aircraft did not seem to have directional control and no braking; with the right pedal fully depressed on both sides. As the left gear and the nose wheel departed the paved taxiway I retarded both mixtures so the prop would not hit the taxi edge lights; the left engine stopped and the right one kept running (both fuel pumps were on low). The aircraft came to a stop and I decided to restart the left engine and taxied to the terminal; the First Officer (FO) and myself were surprised as to what happened; and we both figured it could have been a gust of wind. Upon arrival at the terminal I turned towards the 3 passengers and made sure they were ok and told them that we probably hit a gust of wind; they seemed undisturbed. The FO and myself inspected the landing gear and the propellers and noticed a small nick in one of the blades of the left propeller. I immediately called the chief pilots office; and gave the manager on duty a description as to what happened. I wrote up the aircraft for inspection.
After an uneventful landing I initiated a right turn on to the B taxiway at normal (even slow) taxi speed. The plane turned approximately 60 degrees of the 90 degree turn and then stopped turning. At that time both myself and the Captain were applying full right rudder and full right brake; yet the aircraft continued straight.The Captain and myself inspected the landing gear and propellers. The landing gear had a small amount of mud but seemed fine otherwise.
C402 Flight Crew reports an unexplained loss of control during taxi off the runway after landing resulting in a taxiway excursion and possible damage to the left propeller. The aircraft is then taxied to the ramp.