Very finicky engines to operate. Takes proficiency for sure, which Dan had plenty of. He was the most experienced 404 driver in the company. I did learn that these airframes had been parked in October for good. But I guess UPS was needing some additional lift that day. I also know the airplane was parked outside and cold soaked. I'm wondering if a block cracked.

In any event, my good friend is gone and will be sorely missed by many....