Captain of an air carrier medium large transport declare an emergency after the left engine quit during descent. Successful landing was made at their destination.

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Attributes
ACN	410886
Time
Date	199808
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : oak
State Reference	CA
Altitude	msl bound lower : 23000 msl bound upper : 23000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zoa tracon : sfo
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other arrival star : star enroute airway : sfo enroute airway : zoa
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 260 flight time total : 11500 flight time type : 4600
ASRS Report	410886
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

During descent leaving FL230 noticed left engine N1 drop to 20% (32% is normal during flight idle descent). Fuel flow very low, and engine would not respond to throttle movement. Low oil pressure light came on, low idle light came on, and then generator dropped off. Left engine had flamed out. Cavu conditions, all system normal in cockpit with all fuel pumps operating normally, ignition on continuous. Declared emergency with bay approach and asked for priority to sfo. Had first officer perform single engine checklist, and I had the flight attendants prepare for a non-evacuate/evacuation advisory landing. Bay approach gave us excellent handling, we were cleared for visual approach runway 28L at sfo. Uneventful single engine landing at sfo. Clearing runway had emergency crews check left engine for fire and damage, none found. Went to gate and deplaned passenger. Maintenance tried to start engine at gate and it hung at 38%. Subsequently heard (not verified) that mec (main engine control) was defective.

Original NASA ASRS Text

Title: CAPT OF AN ACR MLG DECLARE AN EMER AFTER THE L ENG QUIT DURING DSCNT. SUCCESSFUL LNDG WAS MADE AT THEIR DEST.

Narrative: DURING DSCNT LEAVING FL230 NOTICED L ENG N1 DROP TO 20% (32% IS NORMAL DURING FLT IDLE DSCNT). FUEL FLOW VERY LOW, AND ENG WOULD NOT RESPOND TO THROTTLE MOVEMENT. LOW OIL PRESSURE LIGHT CAME ON, LOW IDLE LIGHT CAME ON, AND THEN GENERATOR DROPPED OFF. L ENG HAD FLAMED OUT. CAVU CONDITIONS, ALL SYS NORMAL IN COCKPIT WITH ALL FUEL PUMPS OPERATING NORMALLY, IGNITION ON CONTINUOUS. DECLARED EMER WITH BAY APCH AND ASKED FOR PRIORITY TO SFO. HAD FO PERFORM SINGLE ENG CHKLIST, AND I HAD THE FLT ATTENDANTS PREPARE FOR A NON-EVAC ADVISORY LNDG. BAY APCH GAVE US EXCELLENT HANDLING, WE WERE CLRED FOR VISUAL APCH RWY 28L AT SFO. UNEVENTFUL SINGLE ENG LNDG AT SFO. CLRING RWY HAD EMER CREWS CHK L ENG FOR FIRE AND DAMAGE, NONE FOUND. WENT TO GATE AND DEPLANED PAX. MAINT TRIED TO START ENG AT GATE AND IT HUNG AT 38%. SUBSEQUENTLY HEARD (NOT VERIFIED) THAT MEC (MAIN ENG CTL) WAS DEFECTIVE.

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.