Narrative
The copilot reported that the pilot-in-command (PIC) requested a lower altitude and switched the fuel tanks from the main fuel tank to the auxiliary fuel tank position. Shortly thereafter, the engines sputtered, prompting a return of the fuel selectors to the main fuel position. The PIC then informed air traffic control, "sir we are running out of fuel now."
A witness observed the aircraft approaching at treetop level after hearing the engines sputter. The airplane executed a left turn followed by a steep bank to the right, then disappeared from view below the tree line.
Examination Findings
Examination of the crash site revealed that the left fuel selector was in the main fuel position. The right fuel selector was found loosely positioned in-between the auxiliary and main fuel positions. Disassembly of both engines showed no evidence of a pre-crash mechanical failure or malfunction.
Analysis of the propellers indicated that the left propeller was operating under low power at impact and was probably windmilling. The right propeller was operating under conditions of higher power at impact. Neither propeller was in the feather position nor in the vicinity of the low pitch stop at impact.