On July 27, 1994, a Grumman AA-1B (registration N8972L) operated by Paradise Aviation, Inc. was involved in an aviation accident near Corona, CA. Investigators recorded the probable cause as: AN UNDETERMINED PARTIAL LOSS OF ENGINE POWER. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During initial climb, a pilot experienced a partial loss of engine power. Attempting to return to the airport, the airplane descended into rough terrain about 2 miles from the runway. Post-accident engine tests showed roughness with rich mixture.
Accident Description
According to the pilot, during the initial climb after takeoff, the engine experienced a partial loss of power. The pilot attempted to maneuver the airplane back toward the airport. However, insufficient engine power was produced to sustain flight, and the airplane descended into rough terrain approximately 2 miles from the runway.
Post-Accident Engine Examination
Following the accident, the engine was test run. During the test, the engine ran rough when the mixture control was in the rich position, and it smoothed out when the mixture was placed in the lean position. No blockages were noted in the engine's induction system. The carburetor was visually inspected, and no abnormalities were found. The throttle and mixture control linkages were reported to be correctly installed.