What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
8/5/10 Two inspectors from the Washington, d.c. FSDO were assigned to an experimental aircraft accident in st. mary's county, MD. The inspectors arrived on scene of MD route 235 and cloverhill road at 13:45 local time. Aircraft N43015 was parked on a corner property lot. Mr. James Dayton was with his aircraft. He stated that he had experienced a sudden increase in engine RPM and then lost forward thrust. Mr Dayton made an emergency landing on route 235 striking a tree with the right wing tip. Mr. Dayton then pushed the aircraft off of route 235 onto a residential property. Right wingtip damage and right wing spar damage at the wing to fuselage attach point were observed. The propeller was able to be spun freely with no engine compression resistance noted. Mr Dayton was advised that he needed to supply his phase ii flight sign-off, last conditional inspection for the aircraft and his last biannual flight review to the Washington, d.c. FSDO.8/11/10 two inspectors from the Washington, d.c. FSDO traveled to st mary county airport to observe mr. Dayton remove propeller and hub assembly from crankshaft. The first observation was that the crankshaft tapered flange was scored. Coresponding scoring was also observed inside the tapered propeller hub flange. A castellated nut and 44MM washer secured the hub flange to the crankshaft. This 44MM washer was extremely scored and warped. Engine/prop had 35.0 hours at failure.8/12/10 NTSB was notified and supplied with aircraft photographs and copies of pertinent aircraft, engine log book records and pilot statement. privacy data omitted Of the NTSB was assigned to the case. He will provide NTSB report to the FSDO. FAA form 8020-23 will be updated once this report is received.
As the FAA filed it
8/5/10 TWO INSPECTORS FROM THE WASHINGTON, D.C. FSDO WERE ASSIGNED TO AN EXPERIMENTAL AIRCRAFT ACCIDENT IN ST. MARY'S COUNTY, MD. THE INSPECTORS ARRIVED ON SCENE OF MD ROUTE 235 AND CLOVERHILL ROAD AT 13:45 LOCAL TIME. AIRCRAFT N43015 WAS PARKED ON A CORNER PROPERTY LOT. MR. JAMES DAYTON WAS WITH HIS AIRCRAFT. HE STATED THAT HE HAD EXPERIENCED A SUDDEN INCREASE IN ENGINE RPM AND THEN LOST FORWARD THRUST. MR DAYTON MADE AN EMERGENCY LANDING ON ROUTE 235 STRIKING A TREE WITH THE RIGHT WING TIP. MR. DAYTON THEN PUSHED THE AIRCRAFT OFF OF ROUTE 235 ONTO A RESIDENTIAL PROPERTY. RIGHT WINGTIP DAMAGE AND RIGHT WING SPAR DAMAGE AT THE WING TO FUSELAGE ATTACH POINT WERE OBSERVED. THE PROPELLER WAS ABLE TO BE SPUN FREELY WITH NO ENGINE COMPRESSION RESISTANCE NOTED. MR DAYTON WAS ADVISED THAT HE NEEDED TO SUPPLY HIS PHASE II FLIGHT SIGN-OFF, LAST CONDITIONAL INSPECTION FOR THE AIRCRAFT AND HIS LAST BIANNUAL FLIGHT REVIEW TO THE WASHINGTON, D.C. FSDO.8/11/10 TWO INSPECTORS FROM THE WASHINGTON, D.C. FSDO TRAVELED TO ST MARY COUNTY AIRPORT TO OBSERVE MR. DAYTON REMOVE PROPELLER AND HUB ASSEMBLY FROM CRANKSHAFT. THE FIRST OBSERVATION WAS THAT THE CRANKSHAFT TAPERED FLANGE WAS SCORED. CORESPONDING SCORING WAS ALSO OBSERVED INSIDE THE TAPERED PROPELLER HUB FLANGE. A CASTELLATED NUT AND 44MM WASHER SECURED THE HUB FLANGE TO THE CRANKSHAFT. THIS 44MM WASHER WAS EXTREMELY SCORED AND WARPED. ENGINE/PROP HAD 35.0 HOURS AT FAILURE.8/12/10 NTSB WAS NOTIFIED AND SUPPLIED WITH AIRCRAFT PHOTOGRAPHS AND COPIES OF PERTINENT AIRCRAFT, ENGINE LOG BOOK RECORDS AND PILOT STATEMENT. ^PRIVACY DATA OMITTED^ OF THE NTSB WAS ASSIGNED TO THE CASE. HE WILL PROVIDE NTSB REPORT TO THE FSDO. FAA FORM 8020-23 WILL BE UPDATED ONCE THIS REPORT IS RECEIVED.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.