First delivered to Sabena as a Convair 440 in 1956; bought by Frontier in 9.67 and placed in service following the turboprop conversion. After a period of storage, bought by Sierra Pacific in 3.88 and leased to Aspen 12.88. On 19.1.89 the no. 2 engine failed at FL200 outbound from DEN. No. 1 engine then also failed and the aircraft landed on a dirt road at Buena Vista, hitting a fence and a log pile causing the nosegear to collapse. No fatalities but dbr