Air carrier large transport failure of electronic engine control causes engine flame out and inabili...

Attributes
ACN	101866
Time
Date	198901
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : atl
State Reference	GA
Altitude	msl bound lower : 30000 msl bound upper : 30000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	enroute airway : ztl
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 90 flight time total : 6600 flight time type : 28
ASRS Report	101866
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 10000 flight time type : 250
ASRS Report	101868
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : anomaly accepted other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Approximately an hour before the right engine failed, we received an eec primary and secondary failure on the status panel. The right engine continued to operate normally. When we descended out of FL370 the engine continued to operate normally until we passed FL300. At that time when the throttle was reduced to idle the right engine flamed out. We could not relight the engine and made an uneventful single engine landing. Callback conversation with reporter revealed the following: large transport was being ferried to maintenance for faulty eec on the left engine and en route the right engine eec failed and shut down the engine. Learned that on this model large transport the fuel controller is electronic and strictly fly by wire and eec has backup channels for failure but not shut off switch as on other models. Thus with eec complete failure no way to by-pass and relight engine.

Original NASA ASRS Text

Title: ACR LGT FAILURE OF ELECTRONIC ENGINE CONTROL CAUSES ENGINE FLAME OUT AND INABILITY TO RELIGHT.

Narrative: APPROX AN HOUR BEFORE THE RIGHT ENGINE FAILED, WE RECEIVED AN EEC PRIMARY AND SECONDARY FAILURE ON THE STATUS PANEL. THE RIGHT ENGINE CONTINUED TO OPERATE NORMALLY. WHEN WE DESCENDED OUT OF FL370 THE ENGINE CONTINUED TO OPERATE NORMALLY UNTIL WE PASSED FL300. AT THAT TIME WHEN THE THROTTLE WAS REDUCED TO IDLE THE RIGHT ENGINE FLAMED OUT. WE COULD NOT RELIGHT THE ENGINE AND MADE AN UNEVENTFUL SINGLE ENGINE LNDG. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: LGT WAS BEING FERRIED TO MAINT FOR FAULTY EEC ON THE LEFT ENGINE AND ENRTE THE RIGHT ENGINE EEC FAILED AND SHUT DOWN THE ENGINE. LEARNED THAT ON THIS MODEL LGT THE FUEL CTLR IS ELECTRONIC AND STRICTLY FLY BY WIRE AND EEC HAS BACKUP CHANNELS FOR FAILURE BUT NOT SHUT OFF SWITCH AS ON OTHER MODELS. THUS WITH EEC COMPLETE FAILURE NO WAY TO BY-PASS AND RELIGHT ENGINE.

Data retrieved from NASA's ASRS site as of August 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.

Air carrier large transport failure of electronic engine control causes engine flame out and inability to relight.