[jhugo]

> the plane was flying funny because one of the aileron was replaced with electrical tape from dollar store by international airline technician

This is wild speculation, based on second-hand information from your friend, who, given that they referred to it as electrical tape when anyone in the industry would know it's called speed tape and has no similarities with electrical tape, probably doesn't actually know which part of the aircraft is the aileron.

Speed tape on the wing is quite common anywhere in the world on any carrier, and is safe if done properly.

Lion Air and Indonesian aviation has a lot of problems in general, but I doubt this issue was genuinely a safety issue. Your friend probably felt some turbulence on landing.