B737 flight crew reported an engine failure and return to airport.

Attributes
ACN	1758212
Time
Date	202008
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Tower
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Engine
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 105 Flight Crew Type 5400
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

After takeoff at approximately 400 ft. AGL; aircraft began to yaw slightly then returned to normal. At approximately 1;000 ft. AGL the aircraft had a more pronounced left yaw again. The pilot monitoring identified the #1 engine reverser light had illuminated with a slight engine rollback. We leveled off at 2;000 ft. MSL to identify and confirm the malfunction. ATC was notified and we were issued vectors while we ran the QRH reverser checklist. Because of the intermittent uncontrolled reverser deployment the #1 engine was shut down using the QRH engine failure shutdown checklist. We advised ATC and had emergency vehicles meet and inspect the aircraft upon landing. Control of the aircraft was transferred to the captain. With the engine shut down and secured; we continued to get intermittent reverser deployment indications. The single engine approach and landing were normal. We taxied clear of runway xxl for inspection. No issues were found with the aircraft so we elected to continue to the gate.

Original NASA ASRS Text

Title: B737 flight crew reported an engine failure and return to airport.

Narrative: After takeoff at approximately 400 ft. AGL; aircraft began to yaw slightly then returned to normal. At approximately 1;000 ft. AGL the aircraft had a more pronounced left yaw again. The Pilot Monitoring identified the #1 Engine Reverser light had illuminated with a slight engine rollback. We leveled off at 2;000 ft. MSL to identify and confirm the malfunction. ATC was notified and we were issued vectors while we ran the QRH Reverser Checklist. Because of the intermittent uncontrolled reverser deployment the #1 engine was shut down using the QRH Engine Failure Shutdown Checklist. We advised ATC and had emergency vehicles meet and inspect the aircraft upon landing. Control of the aircraft was transferred to the Captain. With the engine shut down and secured; we continued to get intermittent reverser deployment indications. The single engine approach and landing were normal. We taxied clear of Runway XXL for inspection. No issues were found with the aircraft so we elected to continue to the gate.

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.