Boeing (BA) stock is facing renewed pressure following the discovery of a quality issue affecting certain 737 MAX models. This latest setback has triggered concerns about potential delivery delays and increased scrutiny over the aerospace giant's manufacturing processes.

Boeing shares fell 4.1% on Tuesday and were set to extend last week's losses as news of the quality lapse spread. The incident, which caused investors to push the stock down nearly 9%, involved improperly installed components, prompting the company to inspect a significant number of undelivered 737 MAX aircraft.

The market's reaction reflects the ongoing challenges Boeing faces in regaining full confidence after previous 737 MAX incidents. While the current issue is not considered an immediate safety concern, it raises questions about Boeing's ability to consistently maintain rigorous quality control standards.

Adding to the negative sentiment, Boeing (BA) stock slid 2.8% on Wednesday after the company reported that inspections and potential rework could impact near-term delivery schedules. The uncertainty surrounding the extent and duration of these disruptions is further weighing on investor confidence.

Analysts are closely monitoring the situation, with some revising their ratings on Boeing shares. Notably, Wells Fargo downgraded Boeing stock to equal weight from overweight, citing concerns over the potential financial impact of the quality issue and the associated delays.

The decline in Boeing stock underscores the vulnerability of the company's valuation to any disruptions in its production and delivery pipeline. Investors will be paying close attention to Boeing's response to this latest quality challenge and its efforts to restore faith in its manufacturing capabilities. The long-term impact on Boeing's reputation and market share remains to be seen.