Yes, it is. There have been real situations where airplanes faced danger from volcanoes. For example, volcanic ash can be extremely harmful to aircraft engines. 'Airplane vs Volcano' builds on these real - life perils. It might not be a one - to - one account of a specific event but rather a compilation of different true incidents related to the topic.
Plants vs. Zombies is not based on a true story. It's a fantasy game concept that comes from the creative minds of its developers, without any connection to real-world events or true accounts.