Boeing is repairing up to 25 undelivered 737 MAX aircraft after identifying damage to electrical wiring during the production process, according to people familiar with the matter.
The issue involves small scratches found on wiring bundles, reportedly caused during assembly. The affected jets are still on the production line and are undergoing rework before being delivered to customers.
Boeing had already disclosed earlier in the week that it was inspecting newly built aircraft for wiring damage. The company said the problem does not affect 737 MAX jets already in service.
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A company spokesperson said some deliveries scheduled for March could be delayed as a result of the additional inspections and repairs, although it remains unclear whether April handovers will also be affected.
The U.S. Federal Aviation Administration said it is investigating the issue but declined to provide further details.
Despite the rework, Boeing has indicated that the problem should not affect its broader delivery plans. The manufacturer continues to target around 500 deliveries of the 737 MAX in 2026.
The 737 MAX remains Boeing’s main commercial program and a key source of revenue as the company works to stabilize production and recover from recent setbacks.
