Thrust reverser blocker door access platform

Abstract

An access platform comprising a series of stackable polyurethane foam block assemblies that when properly secured to each other creates a set of steps and handholds similar to a ladder. At the top of the platform a maintenance person can stand on a nonskid surface and perform the work needed at any required height. The ladder is radially curved to fit between the thrust reverser sleeve (deployed) and the inner fan duct wall. This radial diameter between the GE, Rolls Royce and Pratt Whitney engines varies within inches. The main access blocks of the access platform can be used on all three engines by using different foam wedges and wall blocks to secure the assembly tightly in place. Over 70% of the blocks are useable on all three engine types, thus reducing the number of overall parts required. Importantly, a special use tool is provided comprising interlocking foam block modules that are built up in place, are shaped to conform to the engine's inner nacelle wall and are used as a support scaffold for maintenance personnel.

Dependencies are inferred from the claim text.