Narrative:

Left fuel quantity gauge placarded inoperative at departure. During climb out; right fuel flow indicator pegged at 16000 pounds per hour; intermittently returning to normal. Fuel counter followed the increased rate of indicated fuel burn. Unable to comply with MEL and possible fuel leak. Discussed situation with maintenance and dispatch during climb out and both concurred a fuel leak was possible. Declared an emergency with the concurrence of dispatch and returned to ZZZ for an uneventful overweight landing.

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Original NASA ASRS Text

Title: MD80 FLT CREW REPORTS INTERMITTENT HIGH FUEL FLOW TO RIGHT ENGINE DURING CLIMB OUT AND ELECTS TO DECLARE AN EMERGENCY AND RETURN.

Narrative: L FUEL QUANTITY GAUGE PLACARDED INOP AT DEP. DURING CLBOUT; R FUEL FLOW INDICATOR PEGGED AT 16000 LBS PER HR; INTERMITTENTLY RETURNING TO NORMAL. FUEL COUNTER FOLLOWED THE INCREASED RATE OF INDICATED FUEL BURN. UNABLE TO COMPLY WITH MEL AND POSSIBLE FUEL LEAK. DISCUSSED SITUATION WITH MAINT AND DISPATCH DURING CLBOUT AND BOTH CONCURRED A FUEL LEAK WAS POSSIBLE. DECLARED AN EMER WITH THE CONCURRENCE OF DISPATCH AND RETURNED TO ZZZ FOR AN UNEVENTFUL OVERWT LNDG.

Data retrieved from NASA's ASRS site as of January 2009 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.