But the company needed me to work at a base in the next state over the next day where their aircraft so I just took a Part 91 ferry flight and rolled right into my next 12. My overtime was crazy!

... work at the base all day for Part 135, then take the Part 91 at the end of that Part 135 portion since Part 91 has not limitations.

You are not limited to 14 hours (i.e., there is not 24 hour lookback for 10 hours of rest) under Part 91.    

Answer; None. 

Also answer; pick up an FAR from time to time.

Is the part 91 flight being conducted as part of your duty day for a Part 135 Air Carrier?

However if you plan on flying part 135 the next you need 10 hours of uninterrupted rest. Flying, driving, swabbing toilets, it doesn't matter. If the company requires you to do it it's part of your part 135 duty time and you cannot take a part 135 duty period without 10 hours of rest. I understand that the garbage operator you flew for didn't care and you were too dumb to defend your rights, that doesn't mean it was legal.

So if you're planning on working Part 135 the next day it still counts towards the lookback. It's really not that hard. If your jobs requires you to do something it's duty and you're not flying part 135 until 10 hours later, no matter what your paramedic area manager says.

If your operator is hurting so bad that on your 7th or 14th or whatever the end of your hitch is they have you ferrying aircraft around past your 14th hour it may be time to start looking for a new job.

this is dumbest and most often dragged out troll on here. 

lots

For your extra hours of rest for blowing through your duty day!

at the beginning of the day or the middle 

not past your 14hrs.   Duh!

you could claim it’s 91 and work longer. I’m surprised air methods hasn’t tried this yet

You're responsible for obeying the FARs.

on Part 91 ref: pilot rest is looking back time of wakefulness.  Guaranteed if the pilot flies and hasn't had rest in, say, 20 hours, it could be investigated under Careless and Reckless operation.  16 hours of wakefulness is generally considered the cutoff concerning effective pilot attentiveness to tasks at hand.

My guess!

grammar and spelling errors bro. like every one

problems working longer than 14 hrs under Part 19!   There is no 10 rest in 24 look-back requirement under Part 91.

And, isn't "bro" suppose to be capitalized, Sis?

lol. as I was saying

zero