Narrative:

After leveling FL350, noted low #1 EPR and fuel flow, all other #1 engine gauges normal (matched #2 and #3 engine) #1 engine failed to respond to throttle. (Fuel panel was confign normally to xfer #2 tk fuel to all engine all xfeed valves open, all boost pumps #2 tank on, all boost pumps #1 and #3 off). Had partial (within 1 mi) loss on #3 engine while investigating #1 engine. Descended (with ATC permission) to FL310, turned on all boost pumps, #1 and #3 recovered immediately. Ran appropriate checklists, cycled all boost pump switches/X-feed valves, checked (first) all cbs. No further abnormalities noted. Continued flight after conferring with maintenance control. Uneventful flight and landing at destination. Suspect the #2 x-feed valve malfunctioned closed and #1 and #3 engines were suction feeding.

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Original NASA ASRS Text

Title: LGT SUFFERS POTENTIAL PWR LOSS IN #1 AND #3 ENGINES.

Narrative: AFTER LEVELING FL350, NOTED LOW #1 EPR AND FUEL FLOW, ALL OTHER #1 ENG GAUGES NORMAL (MATCHED #2 AND #3 ENG) #1 ENG FAILED TO RESPOND TO THROTTLE. (FUEL PANEL WAS CONFIGN NORMALLY TO XFER #2 TK FUEL TO ALL ENG ALL XFEED VALVES OPEN, ALL BOOST PUMPS #2 TANK ON, ALL BOOST PUMPS #1 AND #3 OFF). HAD PARTIAL (WITHIN 1 MI) LOSS ON #3 ENG WHILE INVESTIGATING #1 ENG. DSNDED (WITH ATC PERMISSION) TO FL310, TURNED ON ALL BOOST PUMPS, #1 AND #3 RECOVERED IMMEDIATELY. RAN APPROPRIATE CHKLISTS, CYCLED ALL BOOST PUMP SWITCHES/X-FEED VALVES, CHKED (FIRST) ALL CBS. NO FURTHER ABNORMALITIES NOTED. CONTINUED FLT AFTER CONFERRING WITH MAINT CTL. UNEVENTFUL FLT AND LNDG AT DEST. SUSPECT THE #2 X-FEED VALVE MALFUNCTIONED CLOSED AND #1 AND #3 ENGS WERE SUCTION FEEDING.

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.