Fuel Injection Systems

After installation of a factory-rebuilt engine, a ground-run was performed. At all settings, the engine ran too rich, and adjustments had no effect. Aircraft was not airworthy. Removed fuel servo from engine, sent out for repair. Reinstalled fuel servo after repair, and engine performed satisfactorily. Returned aircraft to service.

Editorial Staff

Monday, August 12, 2019 at 12:00 AM ET

Verified

Key Takeaways:

Aircraft fuel system components, specifically fuel servos and injectors, are susceptible to various malfunctions including manufacturing defects, contamination from installations, and material failures.
These failures can lead to significant engine performance issues such as rough running, loss of power during takeoff, overly rich mixtures, or make the aircraft unairworthy.
Some fuel system component failures, like a popped fuel injector servo plug, can have severe consequences, directly contributing to accidents and total aircraft loss, highlighting their critical importance for flight safety.