I picked up an airplane from maintenance. It was there for a 100 hour inspection (that's an inspection performed after the airplane has been flown for a hundred hours, not an inspection that takes a hundred hours). It usually takes two to three days, and can go to more, depending on what they find on the inspection and how much work those those items take to repair, or whether they have to order parts. I'm not sure how many hours get billed to it. I suppose if it's three guys working on it for a few days, and especially if we work them hard enough that overtime comes into the picture, it might sometimes be that kind of hundred hour, too.
Thankfully dealing with airplane maintenance bills is not my job. My job includes inspecting the airplane after it's been inspected and put back together again to ensure that nothing is obviously wrong, in advance of actually needing to fly the airplane. You'd be surprised what you can find. I've reached through the front cowling and discovered a spark plug set in its engine port and not tightened at all. I've opened the access door to check the oil and discovered an electronic testing device sitting on top of the engine. I've found inspection ports left open, lots of missing cowling screws, disconnected cowl flaps, and stuff that was on the work order but that just didn't get done. This reflects years of experience with many different maintainers at many different companies, not a reflection on my current or any particular company.
On this occasion, a hydraulic puddle appears under the airplane after I let down the flaps. It's happened before. I think they're just overenthusiastic about filling the reservoir. Everything else checks out. I also inspect the paperwork to make sure that we have the required documented proof that the inspection has been done. I see that a hydraulic fitting was adjusted, but that was to correct a small leak in the vicinity of the left main, and my puddle came out of the vent line.
The best part of reviewing the documents is AME spelling. It's can get downright cryptic if the AME is from Québec, and not working in his (usually his) native tongue. Today the person doing the paperwork is a native speaker of English, but was likely tired and in a hurry. The left propeller lever has been "realiened." I didn't even know that it had aliens in it in the first place, let alone that the aliens were required for smooth functioning and that they apparently need periodic replacement.
Okay, now I'm making fun, of course. To all AMEs, let me assure you that it is far more important to me that you know how to apply proper techniques to fix the parts of my airplane than that you can spell them. As long as I can tell what component has had what done to it, and that it worked, I'm quite happy with the paperwork you produce for me. Let me take my little bit of joy from appreciating the creative ways you spell things therein. I love that everyone uses printed stickers these days so I never have to read your handwriting, as I did ten years ago. And seriously, who would guess that aligned had a g in it?