Forced Landing After Engine Oil Exhaustion (N6127Q)

Incident Overview and Sequence of Events During cruise flight, the pilot observed a decrease in engine manifold pressure. Despite adjusting the throttle to increase manifold pressure, the pressure continued to drop. The pilot also noted low oil pressure, declared an emergency, and attempted to land at a nearby airport. The engine lost all power approximately 13 miles northeast of the airport, prompting the pilot to perform a forced landing on a highway. During the landing rollout, the right wingtip contacted a highway guardrail, causing the wing to be torn off the fuselage. ## Engine Examination Findings Examination of the engine revealed that the failure was due to oil exhaustion. The turbocharger oil drain line fitting gasket and o-ring were found to be brittle and broken. This condition allowed oil to leak from the turbocharger, resulting in the loss of engine power.