On August 18, 1966 the US Navy A-4C Skyhawk BuNo 148570 with the VA-56, piloted by LCDR Arthur K. Tyszkiewicz was on a scheduled two plane combination navigation and bombing/strafing flight. The flight departed Lemoore Naval Air Station and flew the navigation phase of the flight to the bombing range. The flight made three 45 degree MK76 bombing runs on selected targets. On the fourth run, the flight made a 15 degree individual strafing runs with 20mm ball ammunition. As LCDR Tyszkiewicz commenced his second strafing run, he noticed the utility hydraulic system warning light flickering. As he aborted the run he noticed the fire warning light and flight control hydraulic warning light had also had come on. He reduced the power control level to idle, but the hydraulic system warning and fire warning lights remained on. He then secured the engine and successfully ejected at approximately 2500 AGL at 190 knots. The aircraft impacted at 30 degrees nose down angle and was completely destroyed.
Sadly less than six months after surviving this accident, at the age of 33, LCDR Arthur Kasimi Tyszkiewicz was killed in action on January 14, 1967 in Laos. LCDR Tyszkiewicz was buried at sea from the U.S.S. Enterprise.