<< >> NASA ASRS Report 755053, September 2007

At cruise a B757 engine reduced to idle thrust but did not fail. An emergency was declared and the flight diverted to a nearby airport.

Attributes
ACN	755053
Time
Date	200709
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzzz.airport
State Reference	FO
Altitude	msl single value : 33000
Aircraft 1
Controlling Facilities	artcc : zzzz.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Function	flight crew : first officer
ASRS Report	755053
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	755052
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : declared emergency flight crew : diverted to alternate flight crew : landed in emergency condition
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

1.5 hours at cruise right engine went to idle. Declared emergency with ATC; talked to dispatch and maintenance; coordinated divert to ZZZZ. Landed uneventful. Callback conversation with reporter revealed the following information: reporter stated that the fuel governor in the fuel control unit failed. The engine reduced to about 60% N1 but did not stop running. The crew left the engine operating for electrical and hydraulic power but turned the bleed air off.

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Original NASA ASRS Text

Title: AT CRUISE A B757 ENG REDUCED TO IDLE THRUST BUT DID NOT FAIL. AN EMER WAS DECLARED AND THE FLT DIVERTED TO A NEARBY ARPT.

Narrative: 1.5 HRS AT CRUISE R ENG WENT TO IDLE. DECLARED EMER WITH ATC; TALKED TO DISPATCH AND MAINT; COORDINATED DIVERT TO ZZZZ. LANDED UNEVENTFUL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THAT THE FUEL GOVERNOR IN THE FUEL CONTROL UNIT FAILED. THE ENG REDUCED TO ABOUT 60% N1 BUT DID NOT STOP RUNNING. THE CREW LEFT THE ENG OPERATING FOR ELECTRICAL AND HYD POWER BUT TURNED THE BLEED AIR OFF.

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.