Aviall and Rolls-Royce have renewed their distribution contract for Rolls-Royce 250 engine parts. The original contract was due to expire Dec. 31, 2009, but the two companies recently extended the contract to 2019. Under the agreement, Aviall, a Boeing subsidiary, continues as exclusive distributor for Rolls-Royce 250 parts. More than 16,000 Rolls-Royce (formerly Allison) 250s have logged more than 180 million flight hours, according to Aviall, which delivers Model 250 parts to 4,500 customers in 155 countries.