Narrative:

I was the first officer. The last reported fuel amount, as reported by the last captain that had flown that aircraft, was shown in the flight maintenance log as 65 gallons. Captain put in a fuel order of 10 gallons, which would bring up the total fuel on board to 75 gallons. We knew that the flight was scheduled for exactly 1 hour, the WX was reported as VFR for our entire route of flight, the airplane burns 40 gallons per hour, we planned on burning 40 gallons to arrive at our destination. We needed 30 gallons more for legal IFR reserves, that left us with 5 gallons of extra reserve. That amount of fuel was enough to legally and safely complete the trip. We decided to switch the tanks to the auxiliary's after level off. We wanted to burn the auxiliary tanks down to 1/8 tank, as per company SOP. Captain had started the timer after I switched the tanks. With the tanks at 1/4 and at our present burn rate there should have been 28 mins of fuel. 7 mins after switching tanks the right engine began to surge and the 'right fuel boost pump fail' annunciator came on. We both immediately suspected a fuel problem. I switched the right engine back to the inboard tank and the engine surge went away. At this time we felt that our reserve fuel load may have been compromised and decided to make a precautionary stop for fuel in toledo. We put on a known amount of fuel and finished the trip without further incident.

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Original NASA ASRS Text

Title: CORP ACFT MAKES PRECAUTIONARY LNDG DUE TO QUESTIONABLE FUEL REMAINING.

Narrative: I WAS THE FO. THE LAST RPTED FUEL AMOUNT, AS RPTED BY THE LAST CAPT THAT HAD FLOWN THAT ACFT, WAS SHOWN IN THE FLT MAINT LOG AS 65 GALLONS. CAPT PUT IN A FUEL ORDER OF 10 GALLONS, WHICH WOULD BRING UP THE TOTAL FUEL ON BOARD TO 75 GALLONS. WE KNEW THAT THE FLT WAS SCHEDULED FOR EXACTLY 1 HR, THE WX WAS RPTED AS VFR FOR OUR ENTIRE RTE OF FLT, THE AIRPLANE BURNS 40 GALLONS PER HR, WE PLANNED ON BURNING 40 GALLONS TO ARRIVE AT OUR DEST. WE NEEDED 30 GALLONS MORE FOR LEGAL IFR RESERVES, THAT LEFT US WITH 5 GALLONS OF EXTRA RESERVE. THAT AMOUNT OF FUEL WAS ENOUGH TO LEGALLY AND SAFELY COMPLETE THE TRIP. WE DECIDED TO SWITCH THE TANKS TO THE AUX'S AFTER LEVEL OFF. WE WANTED TO BURN THE AUX TANKS DOWN TO 1/8 TANK, AS PER COMPANY SOP. CAPT HAD STARTED THE TIMER AFTER I SWITCHED THE TANKS. WITH THE TANKS AT 1/4 AND AT OUR PRESENT BURN RATE THERE SHOULD HAVE BEEN 28 MINS OF FUEL. 7 MINS AFTER SWITCHING TANKS THE R ENG BEGAN TO SURGE AND THE 'R FUEL BOOST PUMP FAIL' ANNUNCIATOR CAME ON. WE BOTH IMMEDIATELY SUSPECTED A FUEL PROB. I SWITCHED THE R ENG BACK TO THE INBOARD TANK AND THE ENG SURGE WENT AWAY. AT THIS TIME WE FELT THAT OUR RESERVE FUEL LOAD MAY HAVE BEEN COMPROMISED AND DECIDED TO MAKE A PRECAUTIONARY STOP FOR FUEL IN TOLEDO. WE PUT ON A KNOWN AMOUNT OF FUEL AND FINISHED THE TRIP WITHOUT FURTHER INCIDENT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.