Large transport suffers potential power loss in #1 and #3 engines.

Attributes
ACN	162266
Time
Date	199011
Day	Sat
Place
Locale Reference	atc facility : sax
State Reference	NJ
Altitude	msl bound lower : 31000 msl bound upper : 35000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zbw
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 12000
ASRS Report	162266
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp
Experience	flight time total : 7500
ASRS Report	162650
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

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.

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.