please don't use a description field as a relationship.
Your system actually needs three tables,
Planes ---< Maintenance Items >--- Products.
Note how I drew the forks between those, this is a many to many relationship. This means that a Plane has many products on it's maintenance plan, and any sort of product can be assigned to many planes as part of ongoing maintenance.
What you really need to tie these tables together are serial numbers or UUIDs, but something that is unique to every record in every table. This is called a primary key. You then create another field called a foreign key that relates to the other table's foreign key.
Here's a great video explaining all of this:
That's exactly what i wanted to do! Thank you very much, it worked wonders.