<< >> NASA ASRS Report 1198120, August 2014

C-150 pilot discovers after performing some basic flight maneuvers; that the engine will only produce partial power. A landing on an available dirt road is chosen as the least risky option and accomplished successfully.

Attributes
ACN	1198120
Time
Date	201408
Local Time Of Day	1801-2400
Place
Locale Reference	ZLA.ARTCC
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Flight Phase	Other Maneuvering
Route In Use	Other Local flight
Flight Plan	None
Component
Aircraft Component	Reciprocating Engine Assembly
Person 1
Function	Pilot Flying
Qualification	Flight Crew Commercial Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 41.8 Flight Crew Total 320.6 Flight Crew Type 2.0
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

Introductory flight in C-150B. After one full-stop taxi-back landing; and one touch-and-go; proceeded west-south-west of the field for maneuvers. After clearing turns; steep turns; one chandelle; one power-on stall; and one power-off stall; upon power application during power-off stall recovery; the engine produced only partial power. Carb heat was applied during low-throttle and idle-power maneuvers. Pilot not flying noted engine not making full power; and began pumping throttle; this restored some power temporarily. I (pilot flying) checked and adjusted mixture to full-rich; cycled carb heat from on to off to on; and began turning towards an airport. It became apparent the remainder of the flight would be at partial power; so we chose to make a precautionary landing on an available dirt road in our vicinity. Landing on road was normal (full flaps; smooth touchdown; full braking to a stop). Engine remained at partial power throughout approach and continued idling after landing until we shut it down. We kept the fuel on since the engine continued to run; and we preferred to have the option of using the partial power remaining. There were no injuries; property damage; or damage to the aircraft.

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Original NASA ASRS Text

Title: C-150 pilot discovers after performing some basic flight maneuvers; that the engine will only produce partial power. A landing on an available dirt road is chosen as the least risky option and accomplished successfully.

Narrative: Introductory flight in C-150B. After one full-stop taxi-back landing; and one touch-and-go; proceeded west-south-west of the field for maneuvers. After clearing turns; steep turns; one chandelle; one power-on stall; and one power-off stall; upon power application during power-off stall recovery; the engine produced only partial power. Carb heat was applied during low-throttle and idle-power maneuvers. Pilot not flying noted engine not making full power; and began pumping throttle; this restored some power temporarily. I (pilot flying) checked and adjusted mixture to full-rich; cycled carb heat from ON to OFF to ON; and began turning towards an airport. It became apparent the remainder of the flight would be at partial power; so we chose to make a precautionary landing on an available dirt road in our vicinity. Landing on road was normal (full flaps; smooth touchdown; full braking to a stop). Engine remained at partial power throughout approach and continued idling after landing until we shut it down. We kept the fuel ON since the engine continued to run; and we preferred to have the option of using the partial power remaining. There were no injuries; property damage; or damage to the aircraft.

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.