BE55 pilot reported engine issue and precautionary shutdown on final approach.

Attributes
ACN	1760142
Time
Date	202009
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	Baron 55/Cochise
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Route In Use	Direct
Flight Plan	IFR
Component
Aircraft Component	Reciprocating Engine Assembly
Person 1
Function	Captain Single Pilot
Qualification	Flight Crew Instrument Flight Crew Private Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 45 Flight Crew Total 1070 Flight Crew Type 1010
Events
Anomaly	Aircraft Equipment Problem Critical Inflight Event / Encounter Other / Unknown

Narrative:

While on final approach to ZZZ; 4 mins / 15 nm. Out; 3;000 ft.; felt a soft 'thump' then a vibration. Troubleshot; verified and executed precautionary shutdown left engine; landed single engine.

Original NASA ASRS Text

Title: BE55 Pilot reported engine issue and precautionary shutdown on final approach.

Narrative: While on final approach to ZZZ; 4 mins / 15 nm. out; 3;000 ft.; felt a soft 'thump' then a vibration. Troubleshot; verified and executed precautionary shutdown left engine; landed single engine.

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.