What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
On 6/21/2016. While on the downwind for ane (Anoka county-Blaine airport) , runway 27, the pilot pulled the carb heat to ?on?, and shortly after set the flaps to the 10 degree position. At that time, the passenger (husband) informed the pilot that the manifold pressure had dropped and indicated ?4.? The pilot added power, and the manifold pressure recovered to a reading of ?14-15.? At this time , the pilot stated that she was concerned about having engine failure, and wanted to ensure she made the runway. She kept her airspeed at 80 knots until she was sure she had the runway made. At this time the pilot started to retard the throttle. The aircraft?s airspeed degraded to 60 knots, then continued to degrade until the aircraft lost all airspeed as the aircraft crossed the end of the runway. The aircraft dropped approximately 8-10 feet when the hard landing occurred.
Subsequent inspection of the aircraft on 6/28/16 by FAA inspectors found the following observations:
On the left side of the airframe, between the engine cowl and the pilots door frame, indications of buckling and pulled rivets. Additionally, on the right side of the airframe, between the engine cowl and the right door frame, there are indications of buckling. On the lower fire wall, near the nose gear attach point, there is damage to the firewall structure (bent). On the lower airframe, underneath the cabin and extending forward to the firewall, extensive buckling. The nose wheel rim bent. All 3 propeller blade tips are bent. FAA inspectors verified all cylinders have compression, and that all engine lines, hoses, and ignition wires were secure. In addition, they verified the engine controls (prop pitch, throttle, and mixture) had continuity. During operation of the carb heat control it appeared that the control arm shaft was not moving. Further inspection revealed the carb heat control arm shaft sheared. Inspection of the left and right wing fuel tanks showed there was adequate fuel. A subsequent fuel sample was taken , it appeared clean, and to resemble 100LL.
As the FAA filed it
ON 6/21/2016. WHILE ON THE DOWNWIND FOR ANE (ANOKA COUNTY-BLAINE AIRPORT) , RUNWAY 27, THE PILOT PULLED THE CARB HEAT TO ?ON?, AND SHORTLY AFTER SET THE FLAPS TO THE 10 DEGREE POSITION. AT THAT TIME, THE PASSENGER (HUSBAND) INFORMED THE PILOT THAT THE MANIFOLD PRESSURE HAD DROPPED AND INDICATED ?4.? THE PILOT ADDED POWER, AND THE MANIFOLD PRESSURE RECOVERED TO A READING OF ?14-15.? AT THIS TIME , THE PILOT STATED THAT SHE WAS CONCERNED ABOUT HAVING ENGINE FAILURE, AND WANTED TO ENSURE SHE MADE THE RUNWAY. SHE KEPT HER AIRSPEED AT 80 KNOTS UNTIL SHE WAS SURE SHE HAD THE RUNWAY MADE. AT THIS TIME THE PILOT STARTED TO RETARD THE THROTTLE. THE AIRCRAFT?S AIRSPEED DEGRADED TO 60 KNOTS, THEN CONTINUED TO DEGRADE UNTIL THE AIRCRAFT LOST ALL AIRSPEED AS THE AIRCRAFT CROSSED THE END OF THE RUNWAY. THE AIRCRAFT DROPPED APPROXIMATELY 8-10 FEET WHEN THE HARD LANDING OCCURRED.
SUBSEQUENT INSPECTION OF THE AIRCRAFT ON 6/28/16 BY FAA INSPECTORS FOUND THE FOLLOWING OBSERVATIONS:
ON THE LEFT SIDE OF THE AIRFRAME, BETWEEN THE ENGINE COWL AND THE PILOTS DOOR FRAME, INDICATIONS OF BUCKLING AND PULLED RIVETS. ADDITIONALLY, ON THE RIGHT SIDE OF THE AIRFRAME, BETWEEN THE ENGINE COWL AND THE RIGHT DOOR FRAME, THERE ARE INDICATIONS OF BUCKLING. ON THE LOWER FIRE WALL, NEAR THE NOSE GEAR ATTACH POINT, THERE IS DAMAGE TO THE FIREWALL STRUCTURE (BENT). ON THE LOWER AIRFRAME, UNDERNEATH THE CABIN AND EXTENDING FORWARD TO THE FIREWALL, EXTENSIVE BUCKLING. THE NOSE WHEEL RIM BENT. ALL 3 PROPELLER BLADE TIPS ARE BENT. FAA INSPECTORS VERIFIED ALL CYLINDERS HAVE COMPRESSION, AND THAT ALL ENGINE LINES, HOSES, AND IGNITION WIRES WERE SECURE. IN ADDITION, THEY VERIFIED THE ENGINE CONTROLS (PROP PITCH, THROTTLE, AND MIXTURE) HAD CONTINUITY. DURING OPERATION OF THE CARB HEAT CONTROL IT APPEARED THAT THE CONTROL ARM SHAFT WAS NOT MOVING. FURTHER INSPECTION REVEALED THE CARB HEAT CONTROL ARM SHAFT SHEARED. INSPECTION OF THE LEFT AND RIGHT WING FUEL TANKS SHOWED THERE WAS ADEQUATE FUEL. A SUBSEQUENT FUEL SAMPLE WAS TAKEN , IT APPEARED CLEAN, AND TO RESEMBLE 100LL.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.