I AM SURE YOU HAVE ALL SEEN THIS PHOTO:
Now what he is doing may seem crazy and insane. But, it is actually a normal procedure done by mechanics such as the one in the photo.
No, it is not duct tape, but it is a special kind of tape.
Speed tape (Such as the tape seen in the photo) is an aluminum, pressure-sensitive tape that is primarily used on aircraft to creat minor repairs such as a small opening in the wing or on the non-critical part of the aircraft. Speed tape is UV light and temperature-sensitive. Meaning it can withstand the extremely cold temperature it may experience on an aircraft that exceeds altitudes such as 10-20 thousand feet. It can also survive high speeds hence the name, speed tape.
Speed tape is also notably known for reducing drag factors with cracks and holes, so it can make for some fuel-efficient advantages.
The use of speed tape has to be authorized by engineering teams and comply with certain requirements. Fines can be levied against airlines that use it to make improper repairs or that use it incorrectly.
Speed tape is used to repair gunshot holes through military aircraft! Also, in the Vietnam war, regular duct tape was used to repair holes in the helicopter blades!
Here are some photos of speed tape:
Image source: https://www.reddit.com/r/pics/comments/cbjzl/get_me_off_this_plane/