Here's a little 767 gem (design flaw?) that I always found interesting:

If you were unfortunate enough to have a total electrical failure - both generators fried and down to battery power only, you would basically have the life of the battery to extend the landing gear...around 30mins or so. No electricity, no landing gear extension. The reason is that the up locks release needs electricity to release.

Definitely a rare scenario but an interesting study.

Good luck with your presentation. The 767 is one of the finest aircraft Boeing ever built and a joy to fly.