Large transport has compressor stalls at altitude. Power back to idle and continue flight.

Attributes
ACN	264396
Time
Date	199402
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : alo
State Reference	IA
Altitude	msl bound lower : 36000 msl bound upper : 36000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute airway : zmp
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 300 flight time total : 9000 flight time type : 4800
ASRS Report	264396
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : commercial
Experience	flight time last 90 days : 210 flight time total : 20000 flight time type : 4000
ASRS Report	264311
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Engine appeared to compressor stall. Climbing through 36000 ft, the right engine appeared to compressor stall, with rollback to flight idle and associated loss of power, although momentary. Engine instruments returned to normal and engine remained on line. It was agreed that the engine would continue at flight idle until approach/landing. Descended to 31000 ft, and remainder of flight was uneventful, with company dispatch and maintenance notified. Emergency equipment was requested for precautionary purposes only on landing in msp.

Original NASA ASRS Text

Title: LGT HAS COMPRESSOR STALLS AT ALT. PWR BACK TO IDLE AND CONTINUE FLT.

Narrative: ENG APPEARED TO COMPRESSOR STALL. CLBING THROUGH 36000 FT, THE R ENG APPEARED TO COMPRESSOR STALL, WITH ROLLBACK TO FLT IDLE AND ASSOCIATED LOSS OF PWR, ALTHOUGH MOMENTARY. ENG INSTS RETURNED TO NORMAL AND ENG REMAINED ON LINE. IT WAS AGREED THAT THE ENG WOULD CONTINUE AT FLT IDLE UNTIL APCH/LNDG. DSNDED TO 31000 FT, AND REMAINDER OF FLT WAS UNEVENTFUL, WITH COMPANY DISPATCH AND MAINT NOTIFIED. EMER EQUIP WAS REQUESTED FOR PRECAUTIONARY PURPOSES ONLY ON LNDG IN MSP.

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.