Key facts
- A GKN Aerospace factory incident has exacerbated shortages of aircraft windows.
- The shortage affects both new aircraft production and aftermarket maintenance.
- Boeing has advised airlines to prioritize essential window replacements.
- GKN Aerospace expects to fully restore production by the end of 2026.
- Private jet manufacturers like Bombardier and Embraer are also experiencing window supply constraints.
Planemakers, airlines, and repair shops are implementing measures to conserve aircraft windows due to a critical shortage exacerbated by an incident at a key GKN Aerospace factory in California. The factory halted production in late May after an overheating tank raised explosion fears, leading to the evacuation of thousands of residents and subsequent parts delays.
While the incident has not yet halted new plane production or airline operations, industry sources and executives indicate concerns over the supply of cockpit and passenger windows. Boeing has communicated with operators, advising them to replace windows only when strictly necessary rather than for aesthetic reasons. The U.S. planemaker stated it is working with its supplier to mitigate potential impacts.
GKN Aerospace, a major supplier for both Boeing and Airbus models, is owned by London-listed Melrose Industries. Melrose announced on Friday that it aims to restore the partially reopened factory to full production capacity by the end of 2026.
The window shortages highlight persistent post-pandemic weaknesses in the aerospace supply chain, with increasing demand from planemakers for new aircraft production colliding with the needs of maintenance shops requiring replacement parts to keep existing fleets operational. This situation is described as echoing similar issues seen with engine supply.
Matteo Peraldo, an aerospace and defense partner at AlixPartners, noted the significant aftermarket demand for windows, which compounds the production-related supply pressures. Airbus has experienced shortages for its A220 model, though this has not yet delayed production, and the company sees positive progress as GKN Aerospace restarts operations.
Lufthansa Technik, a maintenance provider, reported that the supply of aircraft windows has been strained for a long time, with substantially increased lead times and markedly higher procurement costs. For most Boeing aircraft serviced, window supply is typically limited to essential repairs for grounded planes.
The supply challenges have also extended to private jet manufacturers, including Bombardier and Embraer, as well as their repair shops. Bombardier CEO Eric Martel cited window supply as one of the supply chain challenges the company is managing. Embraer had already faced constraints, and the GKN incident has heightened concerns, with reports suggesting window availability has impacted delivery schedules.