What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The pilot, who is also the mechanic of the aircraft, had been working with an inflight engine problem over the previous month. There were two previous instances with the engine running rough and resulted in one declared inflight emergency and one flight returning to the airport shortly after takeoff. The pilot made the decision to take the aircraft flying to do an inflight check. The check started during day VMC conditions and proceeded into night VMC conditions when the engine roughness occurred. The pilot did not declare an emergency and managed the aircraft with partial power back to the airport (1H0). During the final phase of landing the pilot allowed the aircraft to get slow and developed a high sink rate. When he added power the aircraft did not respond, resulting in a hard landing. The aircraft touched down over 400 feet past the approach end of rwy 16 at 1H0.
Investigation of the engine dynon data and manufacture design is still under review. It was discovered that the electrical auxiliary fuel boost pump has and inline filter and this filter was completely clogged with debris. During review of the maintenance manual there was no inspection of the electrical auxiliary fuel boost pump filter. This has been sent for analysis pending results.
Pending propeller information.
As the FAA filed it
THE PILOT, WHO IS ALSO THE MECHANIC OF THE AIRCRAFT, HAD BEEN WORKING WITH AN INFLIGHT ENGINE PROBLEM OVER THE PREVIOUS MONTH. THERE WERE TWO PREVIOUS INSTANCES WITH THE ENGINE RUNNING ROUGH AND RESULTED IN ONE DECLARED INFLIGHT EMERGENCY AND ONE FLIGHT RETURNING TO THE AIRPORT SHORTLY AFTER TAKEOFF. THE PILOT MADE THE DECISION TO TAKE THE AIRCRAFT FLYING TO DO AN INFLIGHT CHECK. THE CHECK STARTED DURING DAY VMC CONDITIONS AND PROCEEDED INTO NIGHT VMC CONDITIONS WHEN THE ENGINE ROUGHNESS OCCURRED. THE PILOT DID NOT DECLARE AN EMERGENCY AND MANAGED THE AIRCRAFT WITH PARTIAL POWER BACK TO THE AIRPORT (1H0). DURING THE FINAL PHASE OF LANDING THE PILOT ALLOWED THE AIRCRAFT TO GET SLOW AND DEVELOPED A HIGH SINK RATE. WHEN HE ADDED POWER THE AIRCRAFT DID NOT RESPOND, RESULTING IN A HARD LANDING. THE AIRCRAFT TOUCHED DOWN OVER 400 FEET PAST THE APPROACH END OF RWY 16 AT 1H0.
INVESTIGATION OF THE ENGINE DYNON DATA AND MANUFACTURE DESIGN IS STILL UNDER REVIEW. IT WAS DISCOVERED THAT THE ELECTRICAL AUXILIARY FUEL BOOST PUMP HAS AND INLINE FILTER AND THIS FILTER WAS COMPLETELY CLOGGED WITH DEBRIS. DURING REVIEW OF THE MAINTENANCE MANUAL THERE WAS NO INSPECTION OF THE ELECTRICAL AUXILIARY FUEL BOOST PUMP FILTER. THIS HAS BEEN SENT FOR ANALYSIS PENDING RESULTS.
PENDING PROPELLER INFORMATION.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.