A C152 on a cross country lost power at 8500 ft and was able to land at a nearby airport.

Attributes
ACN	808765
Time
Date	200810
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 8500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Cessna 152
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	VFR
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : multi engine pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 920 flight time type : 900
ASRS Report	808765
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : landed in emergency condition flight crew : diverted to another airport
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

We were on a VFR cross country flight from ZZZ to ZZZ1. When we were cruising at 8500 ft around abc VOR; we lost our engine power continuously and we tried to recover from the failure by using the carburetor heat; but it was still losing power; the engine instrument gauges were showing normal. We somehow managed to land at the ZZZ2 airport. It seems that the engine was losing power because of the spark plug failure.

Original NASA ASRS Text

Title: A C152 ON A CROSS COUNTRY LOST POWER AT 8500 FT AND WAS ABLE TO LAND AT A NEARBY ARPT.

Narrative: WE WERE ON A VFR XCOUNTRY FLT FROM ZZZ TO ZZZ1. WHEN WE WERE CRUISING AT 8500 FT AROUND ABC VOR; WE LOST OUR ENG PWR CONTINUOUSLY AND WE TRIED TO RECOVER FROM THE FAILURE BY USING THE CARB HEAT; BUT IT WAS STILL LOSING PWR; THE ENG INST GAUGES WERE SHOWING NORMAL. WE SOMEHOW MANAGED TO LAND AT THE ZZZ2 ARPT. IT SEEMS THAT THE ENG WAS LOSING PWR BECAUSE OF THE SPARK PLUG FAILURE.

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.