It’s widely accepted that airplane owners trade their rides every three to five years. There are some who hold out for a decade, and a few more who might have the nostalgia to hang on to their airplane for even a generation. Having an airplane in the family for nearly 60 years? That’s practically unheard of. Ricardo Otaola’s 1962 680F, now with its second-generation owner, is the best kind of heirloom. Otaola’s father Juan owned a construction company in Venezuela that created large public works projects, and airplanes were a great way to commute to the company’s construction sites around the mountainous country. He flew Twin Commanders from the beginning, upgrading from earlier 680S to the 680F in 1962. It…