A B747 #4 engine experienced compressor section damage and was shut down.

Attributes
ACN	636696
Time
Date	200411
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzzz.airport
State Reference	FO
Altitude	msl single value : 24000
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 163 flight time total : 15000 flight time type : 1640
ASRS Report	636696
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : engine indications
Resolutory Action	flight crew : landed in emergency condition other
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

During climb out of ZZZ2 at approximately FL240, one pop sound was heard along with an immediate aircraft yaw. Engine #4 EPR went blank and #4 egt was 630+ and increasing. #4 throttle was brought back to idle with still increasing egt now in red. Qrc for engine damage accomplished. Advised ATC of engine failure, requested lower altitude, a return to ZZZ2 and declared emergency with emergency equipment to stand by on landing. Advised flight attendant of situation and briefed for cabin advisory, landing time 25 mins. Advised dispatch of situation and return to ZZZ2. Advised ATC of need to dump fuel and received clearance to hold to dump fuel. Started dumping at XA35Z and ended dumping at XA55Z. Dumped approximately 49000 pounds fuel. Flew runway 34L ILS ach and landed at approximately 627000 pounds. Approach and landing normal with minimal use of brakes. Maintenance inspection found compressor section blade damage.

Original NASA ASRS Text

Title: A B747 #4 ENG EXPERIENCED COMPRESSOR SECTION DAMAGE AND WAS SHUT DOWN.

Narrative: DURING CLB OUT OF ZZZ2 AT APPROX FL240, ONE POP SOUND WAS HEARD ALONG WITH AN IMMEDIATE ACFT YAW. ENG #4 EPR WENT BLANK AND #4 EGT WAS 630+ AND INCREASING. #4 THROTTLE WAS BROUGHT BACK TO IDLE WITH STILL INCREASING EGT NOW IN RED. QRC FOR ENG DAMAGE ACCOMPLISHED. ADVISED ATC OF ENG FAILURE, REQUESTED LOWER ALT, A RETURN TO ZZZ2 AND DECLARED EMER WITH EMER EQUIP TO STAND BY ON LNDG. ADVISED FLT ATTENDANT OF SIT AND BRIEFED FOR CABIN ADVISORY, LNDG TIME 25 MINS. ADVISED DISPATCH OF SIT AND RETURN TO ZZZ2. ADVISED ATC OF NEED TO DUMP FUEL AND RECEIVED CLRNC TO HOLD TO DUMP FUEL. STARTED DUMPING AT XA35Z AND ENDED DUMPING AT XA55Z. DUMPED APPROX 49000 LBS FUEL. FLEW RWY 34L ILS ACH AND LANDED AT APPROX 627000 LBS. APCH AND LNDG NORMAL WITH MINIMAL USE OF BRAKES. MAINT INSPECTION FOUND COMPRESSOR SECTION BLADE DAMAGE.

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.