C172 instructor pilot reported a safe landing after experiencing an 80% loss of power in the traffic...

Attributes
ACN	1749035
Time
Date	202006
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Tower
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Descent
Route In Use	Visual Approach
Flight Plan	VFR
Component
Aircraft Component	Engine
Person 1
Function	Instructor Pilot Flying
Qualification	Flight Crew Flight Instructor Flight Crew Commercial Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 328 Flight Crew Total 1300 Flight Crew Type 830
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

[My student and I] experienced an 80% loss of engine power on the left downwind to base leg of [the runway]. The flight was a lesson in the local traffic pattern. Immediate return for the runway was executed by the CFI and the airplane was safely landed. After the initial loss of complete engine power occurred; the engine attempted to produce power but was very minimal. Instructor and student were able to exit the runway with no harm to persons or property. The airplane was shut down after taxiing off the non-movement area to be inspected. Emergency services responded on site and the airplane was eventually towed back to its local flight school.

Original NASA ASRS Text

Title: C172 Instructor Pilot reported a safe landing after experiencing an 80% loss of power in the traffic pattern.

Narrative: [My student and I] experienced an 80% loss of engine power on the left downwind to base leg of [the runway]. The flight was a lesson in the local traffic pattern. Immediate return for the runway was executed by the CFI and the airplane was safely landed. After the initial loss of complete engine power occurred; the engine attempted to produce power but was very minimal. Instructor and student were able to exit the runway with no harm to persons or property. The airplane was shut down after taxiing off the non-movement area to be inspected. Emergency services responded on site and the airplane was eventually towed back to its local flight school.

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.

C172 instructor pilot reported a safe landing after experiencing an 80% loss of power in the traffic pattern.