Incident Overview
The pilot was preparing for landing when he positioned the fuel selector to the fullest fuel tank. Shortly thereafter, the engine stopped producing power.
Pilot Actions
In response to the power loss, the pilot moved the auxiliary fuel boost pump switches to the On, 'HI', and 'MAX HI' positions. Both switches subsequently remained in the On position.
Switch Examination
Post-incident examination of the rocker switch revealed that the spring-loaded side was not spring loaded. As a result, the switch would continuously provide 'MAX HI' pressure instead of returning to the off position.
Operator's Manual Guidance
According to the operator's manual, leaving the auxiliary fuel boost pump switches in the 'MAX HI' position with the master switch on and the engine not operating will flood the manifolds.