Boeing is asking airlines to inspect its 737 Max jets for a potential loose bolt in the rudder control system, the airplane maker and Federal Aviation Administration confirmed.

The agency said Boeing issued its inspection guidance to airlines after an international operator found a bolt with a missing nut during routine maintenance.

In a separate case, Boeing also discovered an undelivered aircraft that had an unproperly tightened nut. The company said it was recommending the inspections out of an abundance of caution — and would continue to update customers and regulators on the progress. There have been no in-flight incidents caused by the condition to date, Boeing said.

UnitedHealth Group sells business in Brazil

UnitedHealth Group said it has agreed to sell its large health care business in Brazil to a private investor in a deal that’s expected to close in the first half of next year.

The Minnesota-based health care giant did not disclose a sale price for the division, which it acquired in 2012 for about $4.9 billion, but a media report from Brazil this month suggested the buyer was paying about $515 million.

UnitedHealth said in a regulatory filing that it expects to record a charge of approximately $7 billion, the majority of which is non-cash and due to the impact of foreign currency translation losses.

Amil, the Brazil operation, includes more than 5 million health and dental insurance subscribers as well as a large network of hospitals, clinics and laboratories employing more than 20,000 people, according to a company website.

“UnitedHealth Group and José Seripieri Filho have reached an agreement on the sale of Amil, which includes Amil Insurance, Amil Integrated Care, Amil Dental and Americas Hospitals in Brazil,” the company said in a statement.