An apparatus and method for lining a cargo hold, and an aircraft cargo hold so lined are provided. A plurality of liner panels have formed edges angling away from facing sides of the liner panels. A mounting channel mounted on a supporting structure has an opening for receiving the angled edges of the liner panels. The edges of the liner panels are inserted into the mounting channel. The liner panels are secured by a spline configured to forcibly lock the liner panels into the mounting channel when the spline is pressed against the angled edges of the cargo liner sections and into the mounting channel.