The report focused on a pair of accidents in which a Cessna 182 (near Mill Creek, California) and a Cessna 210D (near Ramona, California) suffered oil starvation—and were found to have have the adapter installed. The installation uses two gaskets—a fiber gasket a to create a seal between the oil pump and the filter adapter, and a copper crush gasket to form a seal at the top of the filter adapter housing. According to the NTSB report, “Post-accident examinations of the oil filter adapters on the Ramona and Mill Creek accident airplanes revealed a crescent indentation in the fiber gasket material. Further, investigators found that the housing for both accident airplanes’ oil filter adapter rotated freely around the shaft and the fiber gasket protruded from the interface between the oil pump bore and adapter. Post-accident examinations of the accident adapters from the Ramona and Mill Creek accidents revealed that the torque was 9 lbf-ft and less than 20 lbf-ft, respectively. However, investigators were not able to determine the root cause of these irregularities.” The required torque value per the installation instructions is 65 ft-lbs. A total of 11 accidents were reviewed by NTSB and Stratus during the investigation.