B777 flight crew reported a temporary loss of thrust in one engine after a bird strike.

Attributes
ACN	1538458
Time
Date	201804
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Component
Aircraft Component	Engine
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Total 28000
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Events
Anomaly	Aircraft Equipment Problem Less Severe Inflight Event / Encounter Bird / Animal

Narrative:

It was my leg flying. Our clearance was to descend to 5000 ft. On right base at about 6000 ft; in the landing lights; my first officer (first officer) and I saw a large flock of white birds pass just under the nose of the aircraft. We felt a slight vibration from the left engine; followed by a roll back and EICAS 'left engine fail' message. [Crew] began to work the checklist as I notified ATC stating we had hit a flock of birds and apparently lost the left engine. I requested arff (airport rescue and fire fighting) to meet us as we were cleared directly to the runway. As I turned my attention to the checklist progress; [crew] had determined that the auto relight system had engaged and the engine was accelerating back to idle. They informed ATC that the engine appeared to be functioning normally. The EICAS 'engine fail' message went away so we configured and proceeded inbound for a normal 25 flap landing. We stopped midfield on the runway to allow arff to inspect the aircraft. I had everyone remain seated and then had arff follow us to our gate. A great job by [crew]. Their professionalism was indispensable.

Original NASA ASRS Text

Title: B777 flight crew reported a temporary loss of thrust in one engine after a bird strike.

Narrative: It was my leg flying. Our clearance was to descend to 5000 ft. On right base at about 6000 ft; in the landing lights; my FO (First Officer) and I saw a large flock of white birds pass just under the nose of the aircraft. We felt a slight vibration from the left engine; followed by a roll back and EICAS 'Left Engine Fail' message. [Crew] began to work the checklist as I notified ATC stating we had hit a flock of birds and apparently lost the left engine. I requested ARFF (Airport Rescue and Fire Fighting) to meet us as we were cleared directly to the runway. As I turned my attention to the checklist progress; [crew] had determined that the auto relight system had engaged and the engine was accelerating back to idle. They informed ATC that the engine appeared to be functioning normally. The EICAS 'Engine Fail' message went away so we configured and proceeded inbound for a normal 25 flap landing. We stopped midfield on the runway to allow ARFF to inspect the aircraft. I had everyone remain seated and then had ARFF follow us to our gate. A great job by [crew]. Their professionalism was indispensable.

Data retrieved from NASA's ASRS site 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.