C172 pilot reported a loss of engine power in the traffic pattern that resulted in a nonstandard pat...

Attributes
ACN	1335367
Time
Date	201602
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
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	Initial Climb
Flight Plan	None
Component
Aircraft Component	Engine
Person 1
Function	Single Pilot
Qualification	Flight Crew Commercial Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 5 Flight Crew Total 3200 Flight Crew Type 1000
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

After performing a touch and go; on upwind; engine stopped producing enough power to climb then stopped performing enough to maintain altitude with significant shuddering. Called pan pan pan on the radio and begun an immediate turn to downwind from the upwind. 3 aircraft in the pattern at the time responded and went around. While on downwind; the inability of the engine to maintain altitude resulted in a midfield base and final. Ultimately the pattern was completely nonstandard. I don't believe I could have done anything differently since the failure of the engine to produce power was revealed to be mechanical. I never 'declared' an emergency but there wasn't a need considering I decided to return to the runway. That is the one thing I suppose I could do differently next time. Alas the field is non-towered and I don't believe in this case it would have helped.

Original NASA ASRS Text

Title: C172 pilot reported a loss of engine power in the traffic pattern that resulted in a nonstandard pattern to a successful landing.

Narrative: After performing a touch and go; on upwind; engine stopped producing enough power to climb then stopped performing enough to maintain altitude with significant shuddering. Called Pan pan pan on the radio and begun an immediate turn to downwind from the upwind. 3 aircraft in the pattern at the time responded and went around. While on downwind; the inability of the engine to maintain altitude resulted in a midfield base and final. Ultimately the pattern was completely nonstandard. I don't believe I could have done anything differently since the failure of the engine to produce power was revealed to be mechanical. I never 'declared' an emergency but there wasn't a need considering I decided to return to the runway. That is the one thing I suppose I could do differently next time. Alas the field is non-towered and I don't believe in this case it would have helped.

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.