United Airlines says the FAA has approved adding modern planes to the routes after safety reviews

United Airlines said the Federal Aviation Administration agreed to add modern planes and routes months after the regulator stepped up scrutiny of the carrier following several safety incidents.

“Today we received good news: After a thorough review and discussion of the proactive safety steps United has taken to date, our FAA Office of Certificate Management has allowed us to begin the process of restarting our certification activities, including modern aircraft and routes, and we will be in continue to work closely with the FAA,” United said in a note to employees on Wednesday.

In March, United said the FAA had increased scrutiny of the airline after a series of incidents earlier this year. This prevented the company from launching modern routes, including flights to Faro, Portugal, ahead of the busy summer tourist season.

The FAA’s approval is good news as United and other carriers expect a record peak season this year.

Safety incidents in recent months include a United Boeing 777 bound for Japan he lost a tire shortly after takeoff from San Francisco in February, and a missing panel was discovered on a Boeing 737 after landing in Oregon in March.

But United said it still had more work to do.

“We will continue to see the FAA’s presence in our operations as it reviews our work processes, manuals and facilities,” the memo to employees said.

The FAA had no immediate comment.

Although the planes involved older jets, the incidents came amid increased scrutiny of the aviation industry after the modern law…Boeing A 737 Max 9 operated by Alaska Airlines earlier this year, a near-disaster that sparked a modern crisis for the manufacturer.