Some years back I was with Bonanza Airlines in Arizona, USA. I was the purchasing agent supporting the F27 fleet. We had Wilcox radios on the aircraft. Wilcox went out of business and finding parts became difficult. At the time we could still find aircraft parts. Bonanza eventually stepped up to DC9s but for the smaller communities the F27 was still the best. Every now and then I was allowed time in the right seat. Loved it. Beat the heck out of a 172.