Summary
We propose to adopt a new airworthiness directive (AD) for The Boeing Company Model 787 series airplanes powered by Rolls Royce Trent 1000 engines. This proposed AD was prompted by a report of failures of the inner fixed structure (IFS) forward upper fire seal and damage to thermal insulation blankets in the forward upper area of the thrust reverser (TR). This proposed AD would require an inspection to determine the part number of the IFS forward upper fire seal, and applicable on-condition actions. We are proposing this AD to address the unsafe condition on these products.