Patent ID: 8371009

Claim:
A method for repairing a composite containment casing comprising a fan casing having an abradable system integrated therewith by a process comprising: assembling a fan casing preform and a sandwich structure; infusing the fan casing preform and the sandwich structure with a resin; curing the resin; and applying at least one abradable layer to the sandwich structure to yield the containment casing comprising the fan casing and an integrated abradable system; wherein the abradable system has at least one damaged portion, and the method of repairing the containment casing comprises: removing the damaged portion of the abradable system to create a hole in the abradable system within the containment casing; shaping a sandwich structure segment to produce a shaped sandwich structure; placing the shaped sandwich structure into the hole in the abradable system; infusing a resin into the shaped sandwich structure while the shaped sandwich structure is within the hole in the abradable system; and curing the resin within the shaped sandwich structure while the shaped sandwich structure is within the hole in the abradable system; and applying at least one abradable layer to the shaped sandwich structure to produce a repaired integrated abradable system within the containment casing.