March 10, 2026 — Boeing disclosed a Boeing 737 MAX wiring flaw on some undelivered 737 MAX jets, caused by a machining error during production at its facility, which will slow first-quarter deliveries, particularly in March.
The company identified small scratches on wiring bundles in a group of undelivered aircraft and paused ticketing and deliveries for rework, as reported by the Wall Street Journal and New York Times. Fixes are estimated to take several days per plane and pose no safety risk to in-service jets.
Details of the Wiring Flaw
Boeing stated, > Our 737 program is performing rework on a group of airplanes to fix wires that have small scratches due to a machining error. (Reuters)
The error occurred within Boeing’s production process, not at a supplier, according to Aviation Week. 737 program VP and general manager Katie Ringgold said,
We paused ticketing and deliveries as we work through this issue… There is going to be disruption [for] the next few days. It will take several days to resolve, not weeks.
Boeing has informed the FAA and customers, confirming all in-service 737 MAX airplanes can continue to operate safely.
Delivery and Production Impact
The Boeing 737 MAX wiring flaw delays deliveries primarily in March, potentially affecting first-half totals, though the company maintains its annual target of about 500 handovers. Production continues at 42 jets per month, with plans to ramp to 47 later in 2026 and 63 eventually.
February saw Boeing’s highest monthly deliveries since 2017, with 51 planes handed over, per Bloomberg.
Market Reaction
Boeing shares initially fell about 3%, or nearly 1% in afternoon trading, before partial recovery, as noted by Barron’s and CNBC.
Broader Context
This Boeing 737 MAX wiring flaw adds to ongoing FAA scrutiny of Boeing’s manufacturing quality following past 737 MAX issues, including production caps and a 2024 incident that led to eased restrictions recently (Seattle Times). The issue does not affect military variants.
