C172 instructor pilot experiences a backfire and a large RPM drop climbing through 1;800 feet. The r...

Narrative:

During run-up procedures there was nothing that showed abnormal with the aircraft. Run-up mag check was within limitations and fuel tanks were sumped without any indications of water or contaminates in the fuel. Short field takeoff showed engine instruments in the green before release of the brakes. Climb out with full throttle on a 050 heading we were passed to approach at 1;500 feet and they cleared us for 2;500 feet. While continuing to climb at 1;800 feet; the engine had a large RPM drop and backfired. After 3-4 seconds the engine restored power. Returned to the field and landed without assistance.

Original NASA ASRS Text

Title: C172 Instructor pilot experiences a backfire and a large RPM drop climbing through 1;800 feet. The reporter immediately turns back to the departure airport and lands uneventfully with the engine running.

Narrative: During run-up procedures there was nothing that showed abnormal with the aircraft. Run-up mag check was within limitations and fuel tanks were sumped without any indications of water or contaminates in the fuel. Short field takeoff showed engine instruments in the green before release of the brakes. Climb out with full throttle on a 050 heading we were passed to approach at 1;500 feet and they cleared us for 2;500 feet. While continuing to climb at 1;800 feet; the engine had a large RPM drop and backfired. After 3-4 seconds the engine restored power. Returned to the field and landed without assistance.

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.

Attributes
ACN	1259860
Time
Date	201505
Local Time Of Day	1201-1800
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	Climb
Component
Aircraft Component	Reciprocating Engine Assembly
Person 1
Function	Instructor
Qualification	Flight Crew Flight Instructor Flight Crew Commercial
Events
Anomaly	Aircraft Equipment Problem Less Severe

C172 instructor pilot experiences a backfire and a large RPM drop climbing through 1;800 feet. The reporter immediately turns back to the departure airport and lands uneventfully with the engine running.