When a GE90 arrives at MTU Maintenance in Hannover, speed is of the essence. The engine’s size means it cannot be transported by air fully assembled, and it goes straight from the ramp to the disassembly department. “Depending on the agreed scope of work, we can dismantle the engine right down to the last screw,” says account manager Nils Hoffman. The parts are then inspected for damage. Most of the time spent working on the engine goes on making repairs and procuring replacement parts. The engine is then carefully reassembled, tested and returned to the customer in the space of some 85 calendar days. “Factors that influence the length of the shop visit include the scope of the work agreed and the availability of key replacement parts. The trick is reconciling the many and sometimes contrary factors at play—such as what the customer wants and availability,” says Hoffmann.
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