Narrative:

Route from nashville to knoxville at 9000 ft, the right engine fuel flow on a baron 58 started to fluctuate from 15 gph to 5 gph. The engine then quit. The fuel gauge showed a little over 1/4 full on right and almost 1/2 on the left side. Restarted the engine and it was running rough and wouldn't maintain power. At that point I told ATC that I was going to land at upper cumberland regional which was about 5 mi to the east. In the descent the engine started to surge again and I shut it down and secured it for landing. On the ground, had fuel added -- 30 gallons a side. The left side showed an increase, with no increase on the right side. When leaving nashville, both sides showed over 1/2 full -- between 1/2 and 3/4 full. Called back to home base and they sent another aircraft and a maintenance person to pick up the passenger and check the aircraft. The engine was checked out and a run-up was completed. The run-up check was normal except for the right engine fuel flow was 4-5 gallons higher than the left and it seemed to be running rough. The aircraft was then flown back to home base. No other problems. The aircraft was checked by maintenance and found some problems with the fuel indicating system. Probable cause was fuel starvation due to faulty fuel quantity system.

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Original NASA ASRS Text

Title: PLT OF BARON 58 HAS FUEL FLOW PROBS WITH FUEL INDICATOR MALFUNCTION RESULTING IN A ROUGH RUNNING ENG. HE DIVERTS TO NEARBY ARPT.

Narrative: RTE FROM NASHVILLE TO KNOXVILLE AT 9000 FT, THE R ENG FUEL FLOW ON A BARON 58 STARTED TO FLUCTUATE FROM 15 GPH TO 5 GPH. THE ENG THEN QUIT. THE FUEL GAUGE SHOWED A LITTLE OVER 1/4 FULL ON R AND ALMOST 1/2 ON THE L SIDE. RESTARTED THE ENG AND IT WAS RUNNING ROUGH AND WOULDN'T MAINTAIN PWR. AT THAT POINT I TOLD ATC THAT I WAS GOING TO LAND AT UPPER CUMBERLAND REGIONAL WHICH WAS ABOUT 5 MI TO THE E. IN THE DSCNT THE ENG STARTED TO SURGE AGAIN AND I SHUT IT DOWN AND SECURED IT FOR LNDG. ON THE GND, HAD FUEL ADDED -- 30 GALLONS A SIDE. THE L SIDE SHOWED AN INCREASE, WITH NO INCREASE ON THE R SIDE. WHEN LEAVING NASHVILLE, BOTH SIDES SHOWED OVER 1/2 FULL -- BTWN 1/2 AND 3/4 FULL. CALLED BACK TO HOME BASE AND THEY SENT ANOTHER ACFT AND A MAINT PERSON TO PICK UP THE PAX AND CHK THE ACFT. THE ENG WAS CHKED OUT AND A RUN-UP WAS COMPLETED. THE RUN-UP CHK WAS NORMAL EXCEPT FOR THE R ENG FUEL FLOW WAS 4-5 GALLONS HIGHER THAN THE L AND IT SEEMED TO BE RUNNING ROUGH. THE ACFT WAS THEN FLOWN BACK TO HOME BASE. NO OTHER PROBS. THE ACFT WAS CHKED BY MAINT AND FOUND SOME PROBS WITH THE FUEL INDICATING SYS. PROBABLE CAUSE WAS FUEL STARVATION DUE TO FAULTY FUEL QUANTITY SYS.

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.