Accident Overview
On January 30, 2010, about 0945 Pacific standard time, a Cessna 172U, registration N8959B, experienced a loss of engine power during cruise flight. The pilot executed a forced landing near a landing strip in the desert close to Pahrump, Nevada. The flight was operated by Chapter 163 Flying Club under Title 14 Code of Federal Regulation Part 91 as a personal cross-country flight. The certified private pilot and one passenger were not injured. The airplane sustained structural damage to the tail section.
Flight Details
The flight departed Shoshone Airport (L61), Shoshone, California, at 0930, destined for North Las Vegas Airport (VGT), Las Vegas, Nevada. Visual meteorological conditions prevailed, and no flight plan had been filed.
Events During Flight
According to a written statement from the pilot, about 10-15 minutes after departure, he heard three loud "pops" and the engine rpm dropped to approximately 1200 rpm. The pilot attempted to restart the engine by adjusting the fuel selector, mixture, and throttle, but was unsuccessful. He initiated a forced landing to desert terrain. During the landing, the nose landing gear sunk into soft ground, causing the airplane to nose over and come to rest inverted.
Post-Accident Examination
A post-accident examination of the engine by a Federal Aviation Administration (FAA) inspector included removal and disassembly of the carburetor. The fuel inlet screen was removed, and fine sand and pebbles consistent with an impact with the ground were observed. The carburetor bowl was removed, revealing that the float valve was improperly installed.
Maintenance History
A review of the airplane's maintenance logbooks showed that the most recent inspection, an annual inspection, occurred on February 27, 2009. The most recent engine overhaul was in February 2004. No maintenance on the carburetor or fuel system was mentioned in the logbook entries.
Manufacturer Information
A representative from Continental Motors reported that the time between overhaul for a carburetor is the same as specified by the engine manufacturer: 10 to 12 years since placed in service or overhaul, whichever comes first.