Narrative:

After perform my run up; got clearance to take off. Checked heading indicator; RPM; engine pressure and temperature and rise of airspeed; took off at vr at about 500-600 feet AGL; scanned my fuel; engine P and T; and RPM as usual.perceived; RPM was fluctuating with partial power (2100-2200 RPM) with full throttle forward. Engine had an issue.processed; I had enough altitude; to make 180 with partial power to west parallel runway with 9;000 ft. Length+ fire engine available (best site for land). It would be best idea to try [to] land in there.performed; [advised ATC and set] pitch and trim for vglide. Upon approval of tower; made easy bank back to runway; once aligned to the runway; dropped flap one at a time while maintaining airspeed; picked visual aiming point; slipped to lose altitude while maintaining airspeed flared; and landed safe.communicated after taxiing out from runway to full stop with ground. Shut off the engine as ordered following procedure; communicated to firefighters of what happened; determined aircraft can be taxied back to ramp safely; taxi back to ramp with caution; shut off engine again for inspection. No injuries to crew and passenger; no damages to aircraft/property. Safe on deck.

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Original NASA ASRS Text

Title: C172 pilot reported engine problems on climb and made a precautionary landing.

Narrative: After perform my run up; got clearance to take off. Checked heading indicator; RPM; engine pressure and temperature and rise of airspeed; Took off at Vr at about 500-600 feet AGL; Scanned my Fuel; Engine P and T; and RPM as usual.Perceived; RPM was fluctuating with partial power (2100-2200 RPM) with full throttle forward. Engine had an issue.Processed; I had enough altitude; to make 180 with partial power to west parallel runway with 9;000 ft. length+ fire engine available (best site for land). It would be best idea to try [to] land in there.Performed; [advised ATC and set] pitch and trim for Vglide. Upon approval of Tower; made easy bank back to RWY; once aligned to the RWY; dropped flap one at a time while maintaining airspeed; picked visual aiming point; slipped to lose altitude while maintaining airspeed flared; and landed safe.Communicated after taxiing out from runway to full stop with Ground. Shut off the engine as ordered following procedure; communicated to firefighters of what happened; determined aircraft can be taxied back to ramp safely; taxi back to ramp with caution; shut off engine again for inspection. No injuries to crew and passenger; no damages to aircraft/property. Safe on deck.

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.