Incident Description
The pilot reported that during cruise flight, shortly after activating the alternate air control, the engine lost power. Attempts to restore power were unsuccessful. The pilot executed a forced landing on a road. During the landing roll, the right wing of the airplane collided with a vehicle and a tree.
Engine Examination
Examination of the air induction system revealed a piece of paper in the servo fuel injector air inlet. The engine was placed on a test stand, and the paper was removed. After removal, the engine was started and found to operate to near full rated RPM. The only discrepancy noted was excessive magneto drop when operating on the right magneto, which was due to a broken sleeve (insulator) of one of the ignition leads.
Maintenance History
Review of the engine logbook revealed that the servo fuel injector was removed on May 8, 1995, and reinstalled 20 days later. The airplane had been operated for about 3.8 hours since the servo fuel injector had been reinstalled.