C152 instructor reported a loud bang after passing 900 feet during climb; followed by a drop in RPM....

Attributes
ACN	1373534
Time
Date	201607
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	Cessna 152
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Route In Use	Visual Approach
Flight Plan	None
Component
Aircraft Component	Reciprocating Engine Assembly
Person 1
Function	Instructor Pilot Flying
Qualification	Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 35 Flight Crew Total 430 Flight Crew Type 80
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

At the time we had already done two touch and goes. We departed once more from runway 8. I was demonstrating the departure climb out to a student and at about 900 ft MSL I heard a large bang; which was followed by a large drop in RPM. The engine also sounded rough with the instrument panel shaking more than usual. I immediately turned the plane in the direction of the runway and requested (and was cleared for) a downwind landing on runway 26. After touchdown we were able to taxi to parking on our own power but the engine roughness continued.

Original NASA ASRS Text

Title: C152 Instructor reported a loud bang after passing 900 feet during climb; followed by a drop in RPM. The reporter was able to maneuver to land opposite direction on the departure runway.

Narrative: At the time we had already done two touch and goes. We departed once more from runway 8. I was demonstrating the departure climb out to a student and at about 900 ft MSL I heard a large bang; which was followed by a large drop in RPM. The engine also sounded rough with the instrument panel shaking more than usual. I immediately turned the plane in the direction of the runway and requested (and was cleared for) a downwind landing on runway 26. After touchdown we were able to taxi to parking on our own power but the engine roughness continued.

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.

C152 instructor reported a loud bang after passing 900 feet during climb; followed by a drop in RPM. The reporter was able to maneuver to land opposite direction on the departure runway.