What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The ATP rated pilot and his three passengers taxied from parking at Dallas executive airport (rdb) on AN14 CFR part 91, IFR clearance to the assigned runway, one-seven via taxiway alpha. The pilot was at the intersection of alpha-four and had just been cleared to cross runway one-seven, when the right side of the aircraft started to drop. The right side continued to drop until the propeller struck the pavement, causing sudden stoppage of the engine. The aircraft continued to drop on its right side until the right wing struck the pavement of the taxiway. There was no resulting fire, even though the aircraft was full of fuel.
An on-site investigation was conducted. This investigation revealed that the right main gear had collapsed due to a broken landing gear over-center down lock and that the landing gear extension/retraction torque tube had caused an overload condition on its mounting/pivot boss on the right main landing gear. The cause of this overload is unknown.
As the FAA filed it
THE ATP RATED PILOT AND HIS THREE PASSENGERS TAXIED FROM PARKING AT DALLAS EXECUTIVE AIRPORT (RDB) ON AN14 CFR PART 91, IFR CLEARANCE TO THE ASSIGNED RUNWAY, ONE-SEVEN VIA TAXIWAY ALPHA. THE PILOT WAS AT THE INTERSECTION OF ALPHA-FOUR AND HAD JUST BEEN CLEARED TO CROSS RUNWAY ONE-SEVEN, WHEN THE RIGHT SIDE OF THE AIRCRAFT STARTED TO DROP. THE RIGHT SIDE CONTINUED TO DROP UNTIL THE PROPELLER STRUCK THE PAVEMENT, CAUSING SUDDEN STOPPAGE OF THE ENGINE. THE AIRCRAFT CONTINUED TO DROP ON ITS RIGHT SIDE UNTIL THE RIGHT WING STRUCK THE PAVEMENT OF THE TAXIWAY. THERE WAS NO RESULTING FIRE, EVEN THOUGH THE AIRCRAFT WAS FULL OF FUEL.
AN ON-SITE INVESTIGATION WAS CONDUCTED. THIS INVESTIGATION REVEALED THAT THE RIGHT MAIN GEAR HAD COLLAPSED DUE TO A BROKEN LANDING GEAR OVER-CENTER DOWN LOCK AND THAT THE LANDING GEAR EXTENSION/RETRACTION TORQUE TUBE HAD CAUSED AN OVERLOAD CONDITION ON ITS MOUNTING/PIVOT BOSS ON THE RIGHT MAIN LANDING GEAR. THE CAUSE OF THIS OVERLOAD IS UNKNOWN.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.