Bob,
To Answer your 1st question yes they could in a fair democratic system but your dealing with the IAM.
Here is a example
Bob wants to get rid of Tony as a AGC so Bob decides to run against him. First Bob needs to get on the Ballot so he has to win the support of 4 lodges in Dist 141. Bob would have to know people in those lodges to get him nominated then win the lodge endorsement. USAirways Fleet Service is mixed in with several other Airlines like United and Hawawian and some lodges have no USAirways workers. So Bob if he is lucky enough to win the nominations in the 4 its still imposable for Bob to win the General election vote. The AGC's run the election like the Mob runs Mafia they watch each others back. Tony has no problem geting nominated in not just 4 lodges but all the lodges. Tony knows Bill and Tom and Joe and all the other AGC's so when the nominations are made Tony gets his goons to nominate Bill and Tom and Joe and any other AGC and they other AGC's do the same for him. They run on a slate which is imposable for Bob to compete against. When the vote comes Bob is placed all the way at the bottom and all the slate boys are at the top on the ballot since they won the majority of the lodges. But hell even if Bob does win the 4 lodges the District pulls fast ones and cheats to invalidates the nominations. Now you say how could that happen read than this report on how
District 141 found guilty
Bob to your second question you already answered yourself.
And third Tony was appointed as a VP to 141 and then promoted and appointed as an AGC. Once your apponted your in for life no one has ever been voted out. Like I said before its run like the Mafia once you get in your in for life.
Hope that explains things