Insulation system for transport aircraft

A method for providing a removable insulation system in the fuselage of an aircraft having an exterior skin, the insulation system covering the inner surface of the exterior skin of the aircraft to insulate the aircraft cabin from the fuselage while being removable to allow visual inspection of the inner surface of the exterior skin, the method comprising the steps of:

• draping a barrier material against the inner surface of the exterior skin and over any structural members attached thereto such that substantially all of the inner surface is covered by the barrier material, and such that an inner surface of the barrier material is in contact with the inner surface of the exterior skin;
• applying a foam mixture to an outer surface of the barrier material, which foam mixture subsequently solidifies into an insulating layer;
• and
• providing a protective layer over a surface of the foam mixture exposed to the interior of the aircraft.