United Airlines, one of America's largest airlines, has found loose bolts on at least five of its Boeing jets, according to Air Current.

Company inspectors on Monday found mismatched bolts and other parts in the plug doors of some Boeing 737 MAX 9 aircraft. according to People familiar with the investigation spoke to Air Current. The inspection comes after a side window panel was blown off during Friday's flight on Alaska Airlines Flight 1282, prompting an emergency landing and injuring several people. (Related: New numbers show companies are failing 'behind the scenes' in the economy)

United Airlines told the Daily Caller News Foundation in a statement: “Since we began preliminary inspections on Saturday, we have discovered areas where we believe there may be problems with the door plug installation, including areas where bolts may need to be tightened.” stated in a sentence. “These findings will be corrected by the technical operations team to safely return the aircraft to service.”

In response to the Alaska Airlines crash, the Federal Aviation Administration (FAA) announced on Saturday that it would temporarily ground more than 100 Boeing 737 MAX-9 aircraft worldwide for inspection. The required tests will take 4 to 8 hours to complete.

The NTSB recovered a door plug from Alaska Airlines Flight 1282, a Boeing 737-9 MAX. NTSB investigators are currently examining the door plug and will send it to the NTSB Materials Laboratory in Washington, D.C., for further testing. pic.twitter.com/fqeemNeBPW

— NTSB Newsroom (@NTSB_Newsroom) January 8, 2024

Alaska Airlines also voluntarily grounded 65 Boeing MAX-9 aircraft on Saturday, and the airline said it was working with regulators to understand the incident. according to to the statement.

In late December, before the Alaska Airlines accident, the FAA had already scheduled all Boeing 737 MAX planes to be inspected for possible loose bolts in the rudder control system.

United Airlines told DCNF: “We are working to return the Boeing 737 MAX 9 to service within the next few days.” “As of Monday, the aircraft remains grounded and we have canceled 200 MAX 9 flights. We expect significant cancellations on Tuesday as well. of flights and avoided approximately 30 cancellations on Monday and Tuesday.”

Boeing did not immediately respond to a request for comment from DCNF.

All content produced by the Daily Caller News Foundation, an independent, nonpartisan news distribution service, is available free of charge to legitimate news publishers with large audiences. All republished articles must include our logo, reporter byline, and DCNF affiliation. If you have any questions about our guidelines or partnering with us, please contact us at licensing@dailycallernewsfoundation.org.