Baron 58/58TC
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Flight Crew Last 90 Days 39.8; Flight Crew Total 14000; Flight Crew Type 170
Confusion; Distraction
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Loss Of Aircraft Control; Ground Excursion Runway
Aircraft Aircraft Damaged; General Maintenance Action
Aircraft; Human Factors
The Baron had been at [FBO] for 7 weeks for its annual. I took it out this morning for a local flight; the first local flight since the annual. I started engines; performed normal run-ups and pre-flight checks; and then departed RWY XX at ZZZ. I flew around the pattern and landed on [Runway] XYL for a full stop. I then taxied back to [Runway] XYL; took off and flew to ZZZ1 for 2 touch and goes on [Runway] XZR; then flew south around  ZZZ airspace to fly a practice visual RNAV approach to RWY XX. Winds were light and variable and the visibility was excellent. Temperature was 29 degrees and the altimeter was 30.00. I had a normal touchdown on RWY XX just before the distance markers. Once I began braking; I felt the whole aircraft shimmy. I applied normal braking and did not feel any of my wheels lock up. The shimmy in the aircraft felt as if I had a flat tire. As the airplane decelerated; the right gear collapsed. I made an effort to try and keep the aircraft on the runway through braking and left rudder but to no avail. The aircraft slid off the right side of the runway between C3 and C2; sliding into the mesa and stopping short of a ravine. The emergency personnel were called. There was no significant damage to any property other than the airplane. The prop had struck the runway and the right main gear left a mark where it skidded across the runway but damage to the runway was minor. The airplane suffered damage to the prop; possibly the engine; right main gear; right wing; flap assembly on the right side and the right main gear door. As I have had a chance to contemplate the incident; I don't believe there is anything I could have done or would have done differently. There is evidence of right main tire failure indicated by a flat spot; but I do not believe my braking was excessive or any different than how I braked on [Runway] XYL earlier that day. The left tire and left main gear assembly are undamaged and show no evidence of flat spotting. My partners and I have owned the airplane for over 3 years and I have over 150 hours in the Baron since we purchased it. I am a professional pilot and have been flying for 27 years and accumulated over 14;000 hours of flight time.
A Beechcraft Baron pilot reported a collapse of the right main gear after landing; resulting in a loss of control of the aircraft and an excursion from the runway surface.