C172 pilot returns to takeoff airport with rough running engine.

Attributes
ACN	795532
Time
Date	200807
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 13000 flight time type : 75
ASRS Report	795532
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : diverted to another airport other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Developed rough running engine 1 mi from departure end of runway xx. Declared an emergency in order to clear landing traffic on runway xx to make way for my immediate return. Aircraft in pattern immediately cleared the pattern to allow me to make a successful landing. No conflicts noted. Great response from other aircraft.

Original NASA ASRS Text

Title: C172 PLT RETURNS TO TKOF ARPT WITH ROUGH RUNNING ENGINE.

Narrative: DEVELOPED ROUGH RUNNING ENG 1 MI FROM DEP END OF RWY XX. DECLARED AN EMER IN ORDER TO CLR LNDG TFC ON RWY XX TO MAKE WAY FOR MY IMMEDIATE RETURN. ACFT IN PATTERN IMMEDIATELY CLRED THE PATTERN TO ALLOW ME TO MAKE A SUCCESSFUL LNDG. NO CONFLICTS NOTED. GREAT RESPONSE FROM OTHER ACFT.

Data retrieved from NASA's ASRS site as of May 2009 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.