U.S. officials have asked Boeing Co. to supply additional information showing that several 737 Max subsystems would not be affected by electrical-grounding problems revealed in April,Reuters reported Wednesday, citing two people familiar with the matter. Boeing flagged a new problem with 737 Max jets in early April, with Wall Street believing that a fix would be easy and cause only “minimal disruption” for Boeing customers. The electrical problems have grounded about a quarter of the 737 Max fleet, while U.S. airlines are standing by for guidance on how to fix it. Through a spokesperson, Boeing told Reuters it continues “to work closely with the FAA and our customers to address the ground path issue in affected 737s.” Shares of Boeing fell 1.5% in midday trading Wednesday, and have gained around 7% this year, compared with an advance of about 11% for the S&P 500 index.

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