B747-200 aircraft has loss of power and high egt during descent into anc. Engine is shut down and re...

Attributes
ACN	364120
Time
Date	199703
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : anc
State Reference	AK
Altitude	msl bound lower : 25000 msl bound upper : 37000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zan
Operator	common carrier : air carrier
Make Model Name	B747-100
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 100 flight time total : 16000 flight time type : 150
ASRS Report	364120
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
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:

Autoplt was on and pms was controling thrust levers. As descent from FL370 was initiated the #2 egt began to increase as the pms brought the thrust levers to idle. As the egt hit 850 degrees I put #2 start lever to cutoff and engine shut down. Tried 2 rapid engine restarts. Engine lit off both times but egt rose rapidly through 600 degrees on both attempts, so I shut engine down again both times. We let engine windmill as we went through the engine shutdown procedure and descended through FL250 (we had been cleared to 10000 ft). At FL250 we completed a normal engine restart procedure and obtained a successful relight with all engine instruments indicating normal. As we were fairly busy on the descent from FL370-FL250, I didn't notify center of our engine problem. We were basically on a normal descent into anchorage and there were no problems other than relighting the engine. After we got the engine started everything was normal so there was no reason to notify center at that time. We made a normal approach and landing. Dispatch was notified and made reports to FAA, etc. The egt never exceeded any limits, maintenance did their 3 hour inspection and found nothing wrong with the engine.

Original NASA ASRS Text

Title: B747-200 ACFT HAS LOSS OF PWR AND HIGH EGT DURING DSCNT INTO ANC. ENG IS SHUT DOWN AND RESTARTED.

Narrative: AUTOPLT WAS ON AND PMS WAS CTLING THRUST LEVERS. AS DSCNT FROM FL370 WAS INITIATED THE #2 EGT BEGAN TO INCREASE AS THE PMS BROUGHT THE THRUST LEVERS TO IDLE. AS THE EGT HIT 850 DEGS I PUT #2 START LEVER TO CUTOFF AND ENG SHUT DOWN. TRIED 2 RAPID ENG RESTARTS. ENG LIT OFF BOTH TIMES BUT EGT ROSE RAPIDLY THROUGH 600 DEGS ON BOTH ATTEMPTS, SO I SHUT ENG DOWN AGAIN BOTH TIMES. WE LET ENG WINDMILL AS WE WENT THROUGH THE ENG SHUTDOWN PROC AND DSNDED THROUGH FL250 (WE HAD BEEN CLRED TO 10000 FT). AT FL250 WE COMPLETED A NORMAL ENG RESTART PROC AND OBTAINED A SUCCESSFUL RELIGHT WITH ALL ENG INSTS INDICATING NORMAL. AS WE WERE FAIRLY BUSY ON THE DSCNT FROM FL370-FL250, I DIDN'T NOTIFY CTR OF OUR ENG PROB. WE WERE BASICALLY ON A NORMAL DSCNT INTO ANCHORAGE AND THERE WERE NO PROBS OTHER THAN RELIGHTING THE ENG. AFTER WE GOT THE ENG STARTED EVERYTHING WAS NORMAL SO THERE WAS NO REASON TO NOTIFY CTR AT THAT TIME. WE MADE A NORMAL APCH AND LNDG. DISPATCH WAS NOTIFIED AND MADE RPTS TO FAA, ETC. THE EGT NEVER EXCEEDED ANY LIMITS, MAINT DID THEIR 3 HR INSPECTION AND FOUND NOTHING WRONG WITH THE ENG.

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.

B747-200 aircraft has loss of power and high egt during descent into anc. Engine is shut down and restarted.