How Mobile Engine Services Could Save Millions

Lufthansa Technik is expanding its Mobile Engine Services to adapt to shop capacity constraints, build revenue and save customers money. Clemens Geercken, Lufthansa Technik’s head of product sales engine services, North America, explains how these mobile services are different than classic on-wing or shop visits.

How are Mobile Engine Services different than classic on-wing offerings?

For starters, the goal of Mobile Engine Services is to optimize flight cycles and the engine’s utilization. Low-pressure compressors (LPC), high-pressure turbines (HPT) and low-pressure turbines (LPT) have different limits on the life-limited parts. Our approach is that when only an LPC or only an LPT has to be overhauled and the core is still good, we isolate the part and service only that, which maximize the life of the part and saves cash. We do that work at Mobile Engine Services shops in Tulsa (Oklahoma), Montreal, Frankfurt and Shenzen, China. We basically swap the module, which saves the engine having to be sent to Hamburg for an overhaul.

What are the cost savings from this approach?

You can easily save millions of dollars from not having to transport the whole engine, and if you only overhaul the LPT, for instance, and you’re not looking at the rest of engine, you can save a few more million because you don’t repair what you don’t see.

There are other stations we’re considering. We see the potential and the market demand for additional capacity exists.

What trends are you see in North America?

Mobile Engine Service is something we’ve been doing in Frankfurt for the last 10-12 years. It was born as a side product and has really grown in Europe. At some point in time, we thought, why not bring this across the ocean? It turns out there was a demand. About five years ago, we started with our first three mechanics in Montreal, and we now have about 40. We have about 50 in Tulsa, as well. That shows the sheer demand. One of the biggest obstacles is to convince operators about this new alternative to overhauling engines. Usually as the first step we’ll do a simple replacement. The next time we might do an HPT blade, which requires us to open the core. As the next step, we might replace a whole module. It’s a learning process and for some it’s still a new concept.

There’s a long lead-time on several high-demand engine parts. Is this effecting your turnaround time?

On the one side, all of those modules that we aren’t looking at aren’t affected—as they would be if the engine was in for a shop visit. For parts that count as a shop visit, there we face similar parts shortages issues, as well–even though the parts that are having shortages usually don’t affect the modules we are overhauling. For example, HPT blade replacements: we’ll replace with new blades most of the time. We’re more concerned with shop capacity shortage than the parts shortage and that is exactly why we’re doing Mobile Engine Services. We only have an infinite amount of capacity for engine overhaul. And whether we induct an engine for LPT replacement or whether we do a performance restoration on the core, ultimately, it takes the same amount of space but it doesn’t bring in the same revenue. So, we are only taking engines into the shop that need the full overhaul.

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Ziegler Aerospace is a Global Aerospace Company, Operating under the EASA Part 21 framework and headquartered in the United Kingdom. our experienced Engineering Team is engaged in the design and certification of Structural and Cabin Interiors repairs and modifications for all types of Large Aircraft.