Hello friends. I am currently writing a business plan for a part 135 operation. I am a pilot, so I know and understand the rules for pilots in part 91 and part 135, but I know about nothing about part 135 maintenance requirements. My operation would consist of planes with 9 seats or less and they will weigh less than 7,500lbs. My questions: How much do you charge per hour? (I'm trying to find the average or at least make some data points for planning) Where can I get or learn about the approved maintenance program(s) for a Piper Aerostar? I understand that planes operating under part 135 with 9 seats or less must comply with parts 91, 43, 135.415, 135.417, 135.421, and 135.422. Other than those 135.xxx parts listed, is there anything substantial I should be aware of for the planning stage? My current mechanic told me that running a part 135 operation turns any recommended maintenance into a requirement. Just to double check, is this correct? Thank you everyone! In case I sound like a complete fool, I have read subpart A for part 135 and subpart A for part 119 in detail, but I am STILL working my way through the rest of those parts and taking notes for anything I did not expect or may change part of my plans.