What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The pilot landed at szt in what appeared to be a normal landing, he remembers hearing the two squeals of the main tires on touchdown, and the thump of the nose gear, and then after the aircraft slowed to taxi speed, the main gear unlocked and rotated back into the gear wells causing the aircraft to slide on its amphibious hull chine. Minor damage to the hull chine fiberglass and one gear door. No other damage. Reviewed the aircraft while sitting on its wheels. The gear locks appeared to be fully locked and secure. However, the stainless steel downlock springs appeared weak. Owner/builder to install heavier duty steel springs.
As the FAA filed it
THE PILOT LANDED AT SZT IN WHAT APPEARED TO BE A NORMAL LANDING, HE REMEMBERS HEARING THE TWO SQUEALS OF THE MAIN TIRES ON TOUCHDOWN, AND THE THUMP OF THE NOSE GEAR, AND THEN AFTER THE AIRCRAFT SLOWED TO TAXI SPEED, THE MAIN GEAR UNLOCKED AND ROTATED BACK INTO THE GEAR WELLS CAUSING THE AIRCRAFT TO SLIDE ON ITS AMPHIBIOUS HULL CHINE. MINOR DAMAGE TO THE HULL CHINE FIBERGLASS AND ONE GEAR DOOR. NO OTHER DAMAGE. REVIEWED THE AIRCRAFT WHILE SITTING ON ITS WHEELS. THE GEAR LOCKS APPEARED TO BE FULLY LOCKED AND SECURE. HOWEVER, THE STAINLESS STEEL DOWNLOCK SPRINGS APPEARED WEAK. OWNER/BUILDER TO INSTALL HEAVIER DUTY STEEL SPRINGS.