MANCOS, CO, USA
N8833T
CESSNA R172K
WHILE IN CRUISE THE ENGINE LOST POWER DUE TO FUEL EXHAUSTION. DURING THE FORCED LANDING TO THE ONLY AVAILABLE BUT UNSUITABLE TERRAIN THE AIRPLANE COLLIDED WITH A TREE. ACCORDING TO THE PILOT'S REPORT, HIS PRE-FLIGHT EXAMINATION VERIFIED THAT THE AIRPLANE WAS FUELED TO CAPACITY PRIOR TO HIS CHECKOUT AND POSITIONING FLIGHT FROM PHOENIX TO SCOTTSDALE, ARIZONA. HE DEPARTED SCOTTSDALE THE NEXT MORNING AT 0520 PST. THE ENGINE LOST POWER APPROXIMATELY 0950 MST. THE PILOT SAID HE SHOULD HAVE HAD 5.7 GALLONS REMAINING AFTER LANDING AT THE DESTINATION (TELLURIDE AIRPORT). HOWEVER, COMPANY OFFICIALS SAID THE AIRPLANE WAS NOT FUELED TO CAPACITY AND THAT 3.0 GALLONS PER TANK (6.0 GALLONS TOTAL) WERE ROUTINELY WITHHELD TO PREVENT FUEL EXPANSION AND VENTING. THE PILOT SAID THAT 'LOOKING AT THE FUEL GAUGES IS PART OF MY SCAN, WHICH I RUN THROUGH EVERY FEW SECONS DURING A FLIGHT.' AN FAA INSPECTOR FOUND NO FUEL IN THE RIGHT TANK, VERY LITTLE FUEL IN THE LEFT TANK, AND RESIDUAL FUEL IN THE SUMPS AND GASCOLATOR.
On November 25, 1993, approximately 0950 mountain standard time, N8833T, a Cessna R172K, was substantially damaged during a forced landing about six miles north of Mancos, Colorado. The pilot and two passengers sustained minor injuries. Visual meteorological conditions prevailed for the personal flight. The pilot stated in his enclosed report that during his pre flight inspection he verified that the airplane was fueled to capacity. Westwind Aviation's enclosed report indicated that both fuel tanks were serviced to within three gallons of capacity, which was company procedure, to prevent fuel expansion and venting. The pilot flew with a company instructor for 0.6 hours as part of the rental checkout, then flew from Deer Valley Municipal Airport, Phoenix, Arizona, to Scottsdale, Arizona, Municipal Airport, where he remained overnight. Company officials estimate this flight took 0.4 hours to complete, and that 32.0 gallons were available for the trip to Telluride. The pilot's figures indicate 38.45 gallons were available. The next morning, approximately 0520 Pacific standard time, the pilot and two passengers took off for Telluride, Colorado. Approximately 3.5 hours later, the engine lost power. The pilot made a forced landing and collided with trees. The pilot reported he should have had 5.7 gallons of fuel remaining upon arrival at his destination. Company officials estimated all fuel would have been exhausted. The pilot said that "looking at the fuel gauges is part of my scan, which I run through every few seconds during a flight" and "I do not recall any abnormalities (abnormal fuel consumption) during the latter stages of the flight." A FAA inspector who examined the airplane at the accident site reported that he found no fuel in the right wing tank, and very little fuel in the left wing tank. Draining of both wing sumps and the gascolator yielded residual fuel.
FUEL EXHAUSTION INDUCED POWER LOSS AND THE PILOT'S INADEQUATE PREFLIGHT INSPECTION, DURING WHICH HE FAILED TO INSURE THAT THE AIRPLANE HAD BEEN REFUELED TO CAPACITY. A FACTOR WAS THE LACK OF SUITABLE TERRAIN FOR A FORCED LANDING.
Source: NTSB Aviation Accident Database
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