Lufthansa Technik Swaps Polymer Airbus Latches for 3D-Printed Titanium

When a polymer latch inside the roller shutter assemblies on Lufthansa Technik's Airbus A330s, A340s, and A380s kept failing in service, the MRO provider faced an expensive choice. The original component, injection-molded in polymer, was not strong enough for the wear it saw. Worse, the original equipment manufacturer would not sell the latch individually. A single failure meant replacing the entire roller shutter assembly at a cost running into four figures.

Lufthansa Technik's additive manufacturing team decided to solve both problems at once. They redesigned the latch for metal 3D printing, selecting Ti6Al4V titanium alloy for its strength and fatigue resistance. The new geometry had to match the original part's function while accounting for the different mechanical behavior of titanium. Engineers adjusted wall thickness and elastic response to ensure the redesigned latch would survive the same environment that destroyed the polymer version.

For manufacturing, Lufthansa Technik turned to Materialise. The Belgian company's metal competence center in Bremen, Germany, holds EN 9100 certification for additive manufacturing, the quality standard required for flight-ready aerospace parts. After passing a supplier audit, Materialise was qualified to produce the metal 3D-printed latches. The part is manufactured using laser powder bed fusion, the same process used for many certified aerospace components.

Parts are already flying. Discussions between the two companies began in fall 2025, and the titanium latches are now in service on Lufthansa-operated widebodies. The redesigned part is expected to outlast the original polymer version by a significant margin. Because the latch is now available as an individual replacement, technicians can repair a damaged roller shutter assembly without swapping the entire unit. That targeted repair approach cuts both cost and aircraft downtime.

The collaboration also carries a longer-term signal. Civil aviation authorities have gradually eased certification requirements for 3D-printed polymer parts as operational data accumulated. Metal parts are following the same path. Lufthansa Technik holds EASA Part 21.G and 21.J certifications, allowing it to design, manufacture, and certify flight-ready parts in-house. That capability, combined with Materialise's production capacity, makes the partnership a model for how MRO providers can bring additively manufactured spare parts into routine service without waiting for OEMs to supply them.