Narrative:

While flying along the north side of the river headed west I experienced a loss of engine power. Since I lost nearly 400-500 RPM; I decided to land at the nearest suitable location. After losing 2;500 ft due to loss of engine power I selected [an airport] for my emergency landing location. I declared an emergency with [ATC] and proceeded to fly into an active restricted airspace. The landing was was uneventful.

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Original NASA ASRS Text

Title: The pilot of a C152 entered Restricted Airspace while diverting to the nearest suitable airport due to a lost of engine power.

Narrative: While flying along the north side of the river headed west I experienced a loss of engine power. Since I lost nearly 400-500 RPM; I decided to land at the nearest suitable location. After losing 2;500 FT due to loss of engine power I selected [an airport] for my emergency landing location. I declared an emergency with [ATC] and proceeded to fly into an active Restricted Airspace. The landing was was uneventful.

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.