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Compared to Seneca
I have had a 73P337 since 1996, and I had two Seneca II's before that. They all had the same engines (TSIO360's) and are approximagely the same "mission capable" aircraft. The biggest difference is the pressurization of the 337.
The Skymaster is a little harder to work on, particularly around the engine compartments. I've never had a pressurization problem (probably just jinxed myself) and the pressurization system is pretty simple. The overall costs of maintenance has been about the same. The annual for the Skymaster is probably a bit more expensive, but the fuel burn is less. All in all, pretty much a wash. A well maintained 337 should not be drastically different costwise compared to another aircraft that fits the same mission, at least based on my experience.
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Mark Hislop
N37E
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