A C172 instructor landed safely off airport after the aircraft developed severe vibrations and lost ...

Attributes
ACN	1093763
Time
Date	201306
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	Cruise
Route In Use	Direct
Flight Plan	VFR
Component
Aircraft Component	Engine
Person 1
Function	Pilot Flying
Qualification	Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Commercial Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 1000 Flight Crew Type 400
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

I was conducting a part 61 instructional flight. There were three souls on board of the aircraft. The aircraft had about three hours of fuel left at the moment of the emergency; to the best of my knowledge. After one hour of flight; more or less; we conducted a normal descent to level off at 2;500 ft. Three to five seconds after we had increased the power back to normal cruise power setting; the aircraft started to vibrate severely. In addition; there was a drastic lost in power. I was able to maintain altitude. At that moment I declared an emergency and requested approach to deviate to the nearest airport. After a couple of minutes the aircraft continued to lose power and I was unable to maintain altitude. It was at that moment that I as the pilot in command decided to make a precautionary landing on a road. This decision was made because of the fear of not making an airport runway; causing damage and injuries in the city.

Original NASA ASRS Text

Title: A C172 instructor landed safely off airport after the aircraft developed severe vibrations and lost power.

Narrative: I was conducting a Part 61 instructional flight. There were three souls on board of the aircraft. The aircraft had about three hours of fuel left at the moment of the emergency; to the best of my knowledge. After one hour of flight; more or less; we conducted a normal descent to level off at 2;500 FT. Three to five seconds after we had increased the power back to normal cruise power setting; the aircraft started to vibrate severely. In addition; there was a drastic lost in power. I was able to maintain altitude. At that moment I declared an emergency and requested Approach to deviate to the nearest airport. After a couple of minutes the aircraft continued to lose power and I was unable to maintain altitude. It was at that moment that I as the Pilot in Command decided to make a precautionary landing on a road. This decision was made because of the fear of not making an airport runway; causing damage and injuries in the city.

Data retrieved from NASA's ASRS site as of July 2013 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.