Lufthansa Technik 3D-Prints a Titanium Latch to Stop Replacing Entire Airbus Roller Shutters

Lufthansa Technik had a maintenance problem that cost real money. A polymer latch inside the roller shutter assemblies on Airbus A330s, A340s, and A380s kept failing in service. The latch holds the roller brake and endcap in place, and the original injection-molded part was simply not strong enough for the wear it saw. Worse, the OEM would not sell the latch as a separate spare part. Every failure meant replacing the entire roller shutter assembly, and each complete unit costs four figures.

The airline maintenance division decided to solve both problems at once. Lufthansa Technik's additive manufacturing team redesigned the latch for metal 3D printing, switching the material to Ti6Al4V titanium alloy. The team had to account for the different elastic response of metal compared to polymer, adjusting geometry and wall thickness so the redesigned part would fit the existing assembly without changing anything else on the aircraft.

Lufthansa Technik holds EASA Part 21.G and 21.J certifications, so it can design, manufacture, and certify flight-ready parts in-house. The company chose Materialise to produce the latches, citing the Belgian firm's EN 9100-certified metal competence center in Bremen and its experience with aerospace production controls. Materialise passed the required supplier audit, and the two companies worked together on process stability, production controls, and documentation.

The titanium latches are now certified and in service. The expected service life is considerably longer than the old polymer version, and the part can be ordered individually. That last detail changes the economics entirely. Instead of swapping a complete roller shutter assembly, technicians can now replace just the broken latch. The repair is faster, the cost is lower, and the aircraft spends less time on the ground.

The collaboration has moved past a one-off fix. Materialise is now an official workbench for metal parts on Lufthansa Technik's supplier list. For additive manufacturing in aviation, that is the kind of repeatable, certified production work that actually moves the needle.