Boeing: Wiring Flaws Could Delay Q1 737 MAX Deliveries

‍SEATTLE — Certain Boeing 737 MAX aircraft may be delayed due to wiring flaws recently identified on several jets awaiting handover to airlines. Boeing does not mention if the jets involved both the 737-8 and 737-9 models.

The issue, which involves small scratches on certain wires, will require rework on affected aircraft before they can sent over to customers.

According to the company, the scratches were caused by a machining error during manufacturing. Boeing said technicians are already working to fix the problem, and the repairs can be completed relatively quickly. However, the extra work could still slow deliveries of some planes in the first quarter of 2026.

Boeing emphasized that planes already in service are safe to operate. The issue affects only a group of undelivered aircraft, and the company has informed both regulators and customers about the situation.

Production output not affected

Despite the setback, Boeing said production of the 737 MAX continues at its current pace of about 42 jets per month. The company plans to increase output later in the year and is preparing to open another assembly line in Everett, Washington, as it works to boost production in the coming years.

The American planemaker is still aiming to deliver around 500 of the aircraft in 2026, suggesting the wiring issue is unlikely to affect its overall annual targets. In February alone, Boeing delivered 51 planes, including 43 737 MAX jets — its strongest performance for the month in several years.

Still, the discovery adds to the challenges Boeing has faced in recent years as it tries to rebuild trust and improve manufacturing quality across its aircraft programs.

As of early 2026, the Boeing 737 MAX program holds a massive, multi-year backlog of over 4,800 total MAX aircraft, with a significant portion being 737-8 and 737-9 models.

Certification of the remaining 737-7 and 737-10 models in 2026 is crucial for Boeing.