C172 experienced a rough-running engine on base leg. Aircraft landed without incident.

Attributes
ACN	1322196
Time
Date	201601
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Flight Phase	Final Approach
Route In Use	Visual Approach
Component
Aircraft Component	Reciprocating Engine Assembly
Person 1
Function	Instructor
Qualification	Flight Crew Flight Instructor
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

Upon arrival; [aircraft] was cleared to land and to fly direct to the left base. On an extended base we had the engine power decrease three times and the engine vibrating three times and come back to normal. We informed ATC and told them that our plan B is to land straight ahead on the road if we can't make the runway. We were cleared to land and landed with no further issues or incidents.

Original NASA ASRS Text

Title: C172 experienced a rough-running engine on base leg. Aircraft landed without incident.

Narrative: Upon arrival; [aircraft] was cleared to land and to fly direct to the left base. On an extended base we had the engine power decrease three times and the engine vibrating three times and come back to normal. We informed ATC and told them that our plan B is to land straight ahead on the road if we can't make the runway. We were cleared to land and landed with no further issues or incidents.

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.