Quality issues at Boeing (NYSE: BA) are disrupting the schedules of airline customers. Shares of the aerospace giant are down nearly 5% as of 1 p.m. ET as investors ponder the long-term impact on Boeing.

Boeing's once pristine reputation as an aerospace manufacturer has been badly bruised by a series of mishaps over the past five years. The company's 737 MAX, which was once predicted to break aviation sales records, was grounded for 18 months after a pair of fatal accidents and subsequent engineering fixes. Other models, including the 787 Dreamliner and 777X, have either been delayed or temporarily grounded because of concerns.

More recently, a near-disastrous issue involving a 737 operated by Alaska Air Group (NYSE: ALK) led to a Federal Aviation Administration-mandated production slowdown and delays in certifying new designs.

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Source Fool.com