NTSB Identification: LAX04LA328.
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Accident occurred Wednesday, September 22, 2004 in Flagstaff, AZ
Probable Cause Approval Date: 01/31/2006
Aircraft: Cessna 210B, registration: N9757X
Injuries: 1 Minor,1 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 airplane went over an embankment at the departure end of the runway and nosed over after the pilot aborted the takeoff. The pilot elected to takeoff with a quartering tailwind on the 6,900-foot-long runway in spite of the tower controller offering the pilot the use of the opposite runway. Witnesses indicated that the airplane lifted off the ground with 2,000 feet of runway remaining. The engine sounded as if it was not producing full power and was heard to be surging or revving up and down. The pilot noted that after liftoff the airplane would not climb over 20-25 feet above the runway and he elected to abort the takeoff and touched down with approximately 500 feet of runway remaining. According to the pilot, he adjusted the mixture for peak engine revolutions per minute before takeoff. The fuel flow indicator has white radial markings denoting the best power fuel flow for different field elevations. The recommended procedure noted in the airplane's owner manual informs the pilot that he/she should utilize the fuel flow indicator and adjust the fuel flow to that which corresponds to the field elevation marked on the face of the dial. However, the owner's manual was not in the airplane, and the pilot was utilizing a checklist that did not have the information for a high performance takeoff. The airport elevation was 7,001 feet mean sea level. The density altitude was calculated as 8,461 feet. Post-accident examination of the engine revealed that its spark plugs were dark black in color, which is consistent to an excessively rich mixture setting. Following installation of a serviceable propeller, the engine was started and exercised through out it's normal power range with no anomalies noted.

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

the pilot's improper leaning procedures and delayed decision to abort the takeoff when it became obvious that the engine was not developing full power. A factor in the accident was the pilot's decision to use a runway with a quartering tailwind.

Full narrative available

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