Near total loss of power results in C182 pilot landing safely off airport.

Attributes
ACN	739907
Time
Date	200705
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz.artcc tower : osh.tower
Operator	general aviation : personal
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Flight Phase	cruise : level landing : roll
Flight Plan	None
Person 1
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : multi engine pilot : private
Experience	flight time last 90 days : 16 flight time total : 1060 flight time type : 314
ASRS Report	739907
Events
Anomaly	aircraft equipment problem : critical ground encounters other
Independent Detector	other flight crewa
Resolutory Action	flight crew : landed as precaution flight crew : landed in emergency condition
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

After descending from 6500 ft to 3000 ft; we lost power. The engine started making considerable metal clanging noises and vibrating severely when power was restored. After advising ATC we were not going to continue to ZZZ; we picked an off-airport landing site and landed as a precaution. No property damage was done to the grass field and no damage was done to airplane; pilot or passenger. Sheriff report was made; landowner was contacted and permission to use field was approved. Don't believe any rules or FARS were violated. I believe training on how to recognize and identify different types of engine/propeller problems noises would help training pilots.

Original NASA ASRS Text

Title: NEAR TOTAL LOSS OF POWER RESULTS IN C182 PLT LANDING SAFELY OFF ARPT.

Narrative: AFTER DSNDING FROM 6500 FT TO 3000 FT; WE LOST PWR. THE ENG STARTED MAKING CONSIDERABLE METAL CLANGING NOISES AND VIBRATING SEVERELY WHEN PWR WAS RESTORED. AFTER ADVISING ATC WE WERE NOT GOING TO CONTINUE TO ZZZ; WE PICKED AN OFF-ARPT LNDG SITE AND LANDED AS A PRECAUTION. NO PROPERTY DAMAGE WAS DONE TO THE GRASS FIELD AND NO DAMAGE WAS DONE TO AIRPLANE; PLT OR PAX. SHERIFF RPT WAS MADE; LANDOWNER WAS CONTACTED AND PERMISSION TO USE FIELD WAS APPROVED. DON'T BELIEVE ANY RULES OR FARS WERE VIOLATED. I BELIEVE TRAINING ON HOW TO RECOGNIZE AND IDENT DIFFERENT TYPES OF ENG/PROP PROBS NOISES WOULD HELP TRAINING PLTS.

Data retrieved from NASA's ASRS site as of January 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.