This Mosquito PR.XVI was flown by Lt. Earl L. Muchway and Lt.Lionel Proulux as one of two US Mosquito crews that accompanied the B-17s on the disastrous Frantic Joe shuttle mission to the USSR, Italy and then back to England between 21 June and 5 July 1944. After take-off from San Severo, in Italy, on 5 July, NS519 was forced to abort the flight back at 25,000 ft when the port propeller ran away. The aircraft was repaired by an RAF unit back in Italy and the crew returned to Watton alone, a few days later.