weight, and increased cabin pressure. Improved variant with four-bladed propellers and other improvements including an extra cabin window, 36 built. Variant with improved engines, 139 built. Cavenaugh Cargoliner Freighter conversions of long fuselage MU-2 variants by Cavenaugh Aviation Inc. of Conroe, Texas, by addition of a crew door in place of a flight deck window and a large cargo door in the rear port fuselage. Eleven aircraft had been converted by March 1987. Military LR-1 Japanese military designation for MU-2C and MU-2Ks operated by the JGSDF, 20 delivered. MU-2S Japanese military designation for a MU-2E search and rescue variant for the air force, 29 delivered. Aircraft on display Australia An MU-2 is on display at the Australian Aviation Heritage Centre at Darwin International Airport, Australia. Mexico An MU-2P (code ETE-1357) is on display at the Museo Militar de Aviacion at the Felipe Ángeles International Airport in Santa Lucia, Mexico. United States An MU-2 is on display at Sparks Aviation at the Tulsa International Airport in Tulsa, Oklahoma. Incidents and accidents As of November 2019, there have been 161 documented incidents and 363 deaths involving the MU-2. Listed below are a select few of the most notable ones. On 19 April 1993, an MU-2B-60 owned by the State of South Dakota, registration number N86SD, sustained extensive damage to the fuselage and left-hand wing and engine mounts after a propeller blade separation during cruise. The pilot was unable to maintain altitude and crashed into a farm silo in low visibility about south of Dubuque, Iowa. All eight people aboard the aircraft died, including Governor of South Dakota George S. Mickelson. Later that April, investigators' findings prompted the FAA to order the immediate inspection of Hartzell propellers similar to those on the accident aircraft. The accident was attributed to metal fatigue of the propeller hub caused by improper design and manufacturing. On 6 October 2000, an MU-2B-26A, registration number N60BT, crashed in a wooded area short of Runway 24 at Martha's Vineyard Airport in Edgartown, Massachusetts, during a landing approach in low visibility. The crash killed pilot and former New Jersey State Senator Charles B. Yates, his wife, and two of their children. The NTSB attributed the crash to the pilot's failure to follow instrument flight procedures, with the low cloud ceiling being a contributing factor; the report also noted that he had initiated but failed to complete MU-2 specific flight training. On