A B747-400 in cruise at FL320 experienced continuous #2 engine compressor stall. Advised ATC and maintenance control. Diverted. No emergency declared.

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Attributes
ACN	656681
Time
Date	200505
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sfo.airport
State Reference	CA
Altitude	msl single value : 32000
Aircraft 1
Controlling Facilities	artcc : zoa.artcc
Operator	common carrier : air carrier
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 240 flight time total : 17000 flight time type : 2900
ASRS Report	656681
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : #2 engine instruments other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : overcame equipment problem flight crew : diverted to another airport
Consequence	other other
Supplementary
Problem Areas	Aircraft Chart Or Publication
Primary Problem	Aircraft

Narrative:

Cruise #2 engine had continuous compressor stall -- spooled back with rising egt. We followed qrc and got dispatch/maintenance on satcom. No engine limits exceeded. Successfully completed restart. Engine ran fine for a few mins then compressor stalled again. Accomplished appropriate checklists while informing dispatch/maintenance. Received ATC clearance direct sfo; dumped fuel; informed flight attendants and passenger; made normal approach and landing. No emergency was declared and no emergency equipment requested.

Original NASA ASRS Text

Title: A B747-400 IN CRUISE AT FL320 EXPERIENCED CONTINUOUS #2 ENG COMPRESSOR STALL. ADVISED ATC AND MAINT CTL. DIVERTED. NO EMER DECLARED.

Narrative: CRUISE #2 ENG HAD CONTINUOUS COMPRESSOR STALL -- SPOOLED BACK WITH RISING EGT. WE FOLLOWED QRC AND GOT DISPATCH/MAINT ON SATCOM. NO ENG LIMITS EXCEEDED. SUCCESSFULLY COMPLETED RESTART. ENG RAN FINE FOR A FEW MINS THEN COMPRESSOR STALLED AGAIN. ACCOMPLISHED APPROPRIATE CHKLISTS WHILE INFORMING DISPATCH/MAINT. RECEIVED ATC CLRNC DIRECT SFO; DUMPED FUEL; INFORMED FLT ATTENDANTS AND PAX; MADE NORMAL APCH AND LNDG. NO EMER WAS DECLARED AND NO EMER EQUIP REQUESTED.

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.