NTSB Identification: WPR10LA123
14 CFR Part 91: General Aviation
Accident occurred Saturday, January 30, 2010 in Pahrump, NV
Probable Cause Approval Date: 09/19/2011
Aircraft: CESSNA 172, registration: N8959B
Injuries: 2 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The pilot reported that about 10-15 minutes after departure he heard three loud "pops" and the engine rpm dropped to about 1200. The pilot attempted to restart the engine by adjusting the fuel selector, mixture, and throttle, but was unsuccessful. The pilot initiated a forced landing to desert terrain. As the airplane touched down, the nose landing gear sunk into the ground and the airplane nosed over and came to rest inverted. A postaccident examination of the engine by a Federal Aviation Administration inspector revealed that the carburetor float valve was improperly installed, which restricted fuel flow to the engine. According to a Continental Motors representative, the carburetor overhaul requirements were the same as specified for the engine; 10 to 12 years since placed in service or last overhauled, whichever comes first. A review of the aircraft logbooks revealed no entries pertaining to the maintenance or overhaul of the carburetor.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

Fuel starvation as a result of the improper installation of the carburetor float valve by unknown personnel.

Full narrative available

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