• GKN Aerospace's aircraft window production remains at 50% capacity after a chemical incident.
• The company is one of few suppliers of critical aircraft windows.
• Boeing and Airbus are monitoring the situation and taking steps to mitigate impacts.
• Production is expected to return to normal by September 28.

The disruption in aircraft window production may indicate a vulnerability in the global aerospace supply chain, which could have significant implications for aircraft manufacturers and airlines. This incident suggests that the industry's reliance on a few critical suppliers may lead to a balancing act between plane-makers and their suppliers, potentially affecting production and delivery timelines.