The NTSB’s August 13 factual report of the Nov. 20, 2013 crash of a Mitsubishi MU-2B while on approach to Tulsa International Airport in Oklahoma offered only a single potential clue into anything unusual by mentioning that the left engine’s fuel shutoff valve was in the closed position. Investigators added that they did not detect any other anomalies with either engine. The accident claimed the life of Dr. Perry Inhofe, son of U.S. Senator James Inhofe (R-Okla.). Dr. Inhofe was the only person aboard the aircraft.