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It’s going to be a few more months before 737 Maxes are in the air again.

Officials from airplane manufacturer Boeing have just announced that they don’t expect the return of 737 Max Jets until mid-2020. This is the second year in a row travelers and airlines alike will be affected by issues with Boeing’s 737 Max Jets.

The 737 Max Jets were grounded after the jetliner was involved in two commercial crashes.

In a statement, Boeing officials said, “We are currently estimating that the ungrounding of the 737 Max will begin during mid-2020. This updated estimate is informed by our experience to date with the certification process.”

The Federal Aviation Administration responded, “The agency is following a thorough, deliberate process to verify that all proposed modifications to the Boeing 737 Max meet the highest certification standards. We continue to work with other safety regulators to review Boeing’s work as the company conducts the required safety assessments and addresses all issues that arise during testing. We have set no timeframe for when the work will be completed.”

United Airlines has opted out of utilizing the Max Jets in the next several months and instead wants to focus more on pilot practice.

Today, United Airlines Chief Commercial Officer Andrew Nocella said, “We do not anticipate flying the Max this summer.”

The airline will push the timeline back for that particular plane and leave some leeway to have more pilots participate in more simulation training.