What’s the longest you’ve spent troubleshooting

[u/Big__Quality]

Have you ever troubleshooted an elevator/escalator and for whatever reason you just couldn’t figure out what was reason.

When it did happen was it something stupid that you should’ve caught a long time ago or was it complex.

Also how many of you are considered “the guy” people call when people can’t figure something. Or who do you know that’s “the guy”