Get All Access for $5/mo

Report: United Airlines, Alaska Airlines Find 'Loose Bolts' on Plane Doors Following Inspections Preliminary inspections on grounded Boeing 797 Max 9 aircraft began after a door flew off an Alaska Airlines plane mid-flight on Friday.

By Emily Rella

Opinions expressed by Entrepreneur contributors are their own.

United Airlines and Alaska Airlines said that preliminary investigations of Boeing 737 Max 9 aircraft in their respective fleets have found loose hardware and bolts on some door plugs.

"Since we began preliminary inspections on Saturday, we have found instances that appear to relate to installation issues in the door plug -- for example, bolts that needed additional tightening," United Airlines explained in a statement, per ABC News. "These findings will be remedied by our Tech Ops team to safely return the aircraft to service."

Related: 'Grateful to be Alive': Passengers Recall Harrowing Moment Airplane Door Flew Off Alaska Airlines Flight

The news comes after a plane door panel blew out mid-flight on an Alaska Airlines aircraft on Friday. The Federal Aviation Agency grounded over 170 Boeing 737 Max 9 planes for emergency inspections following the incident, causing hundreds of cancelations across both airlines.

United did not specify how many of its 737 Max 9 aircraft were found to have loose hardware. The airline currently operates 79 of the models.

Alaska Airlines made a similar statement, noting that none of the aircraft would fly again until formal inspections and investigations were completed.

"No aircraft will be returned to service until all of these steps are complete," Alaska Airlines wrote in a release regarding its 65 Boeing 737 Max 9 aircraft. "The safety of these aircraft is our priority and we will take the time and steps necessary to ensure their airworthiness, in close partnership with the FAA. "

Boeing, whose valuation is down over 9% in the past five days following the news of Friday's accident, released a public statement late Monday: "As operators conduct the required inspections, we are staying in close contact with them and will help address any and all findings. We are committed to ensuring every Boeing airplane meets design specifications and the highest safety and quality standards. We regret the impact this has had on our customers and their passengers."

Related: Alaska Airlines Brewing Coffee That Tastes Better In the Air

No passengers were injured during Friday's incident, and no one was seated in the two passenger seats next to the door.

As of late Tuesday morning, United had canceled another 203 flights and Alaska Airlines had canceled 108.

Emily Rella

Senior News Writer

Emily Rella is a Senior News Writer at Entrepreneur.com. Previously, she was an editor at Verizon Media. Her coverage spans features, business, lifestyle, tech, entertainment, and lifestyle. She is a 2015 graduate of Boston College and a Ridgefield, CT native. Find her on Twitter at @EmilyKRella.

Want to be an Entrepreneur Leadership Network contributor? Apply now to join.

Editor's Pick

Starting a Business

He Started a Business That Surpassed $100 Million in Under 3 Years: 'Consistent Revenue Right Out of the Gate'

Ryan Close, founder and CEO of Bartesian, had run a few small businesses on the side — but none of them excited him as much as the idea for a home cocktail machine.

Franchise

The Top 10 Coffee Franchises in 2024

From a classic cup of joe to a creamy latte, grab your favorite mug and get ready to brew up success with the best coffee franchises.

Business Ideas

63 Small Business Ideas to Start in 2024

We put together a list of the best, most profitable small business ideas for entrepreneurs to pursue in 2024.

Business News

'Jaw-Dropping Performance in 2024,' Says a Senior Analyst as Nvidia Reports Earnings

Nvidia reported its highly-anticipated third-quarter earnings on Wednesday.

Marketing

How Small Businesses Can Leverage Dark Social to Drive Word-of-Mouth Marketing

Dark social accounts for 70% of social media shares and is crucial for small businesses. Here's how you can tap into this hidden marketing opportunity.

Business News

'Do You Sell Cars?': Tesla CEO Elon Musk Trolls Jaguar Rebrand on X

The team running Jaguar's X account was working hard on social media this week.