Quote Originally Posted by BoeingBobby View Post
Gabe is not going to like this reply but, this is one of the times that if you have never been a line pilot for a 121/135 carrier, is hard to understand. Again, look up MEL, DDG, DMI.
No, it's ok. Maintenance procedures and practices are not my strong points. Now, I am sure that there are other ways to understand it other than being a pilot for a 121/135 carrier. What about being in the maintenance, quality control, or engineering department of a 121/135 carrier?

And since you are a (retired) 121/135 pilot, perhaps you can be more constructive and help expand our understanding on the subject.
I was almost hoping that would chime in and say "Gabriel (or Evan or 3WE) is wrong because in fact it works like this: ______".