Piper PA 28-181 accident near Waukesha, Wisconsin, July 13, 2014

The NTSB's narrative final · quoted from the NTSB record

The pilot reported that he had entered the airport traffic pattern for landing. When the airplane was abeam the approach end of the runway, he reduced power, applied carburetor heat, and confirmed that the auxiliary fuel pump was on. When the airplane was on the base leg of the traffic pattern, the pilot attempted to increase engine power, but the engine did not respond; he stated that advancing the throttle to full did not result in an increase in power. He attempted moving the engine and carburetor heat controls to no avail. While attempting the remedial action, he turned toward the runway and declared an emergency. The airplane impacted trees short of the runway. A postaccident examination of the airplane confirmed that fuel was present. The engine was rotated and compression was verified on all cylinders, and the magnetos showed spark that was confirmed at all of the spark plug leads. No mechanical reason for the loss of engine power was discovered. At the time of the accident, the temperature and dew point were 24 degrees C and 17 degrees C, respectively. According to a carburetor icing probability chart, the temperature and dew point were in a range of susceptibility for moderate icing at cruise power settings and serious icing at descent power settings. Because the pilot reported using carburetor heat during the landing approach, the reason for the loss of engine power could not be determined.

The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.