(Bloomberg) -- A panel of government flight-safety experts concluded that Boeing Co.’s redesign of its grounded 737 Max jetliner complies with regulations and is “safe,” according to an update to U.S. lawmakers.

The Technical Advisory Board, created after Boeing’s best-selling jet was grounded following two fatal crashes, has presented its preliminary report to the Federal Aviation Administration, the agency told Congress on Friday.

“The TAB presented its preliminary report to the FAA, detailing their finding that the MCAS design changes are compliant with the regulations and safe,” according to the summary for lawmakers.

The group also made unspecified suggestions of actions that Boeing and FAA should complete before the plane returns to flight, according to the summary. The TAB is also recommending “additional future activity” and FAA has agreed, according to the summary.

The TAB was established shortly after the 737 Max was grounded worldwide on March 13, after the second fatal crash linked to a flight-safety system that malfunctioned. The crashes in Indonesia and Ethiopia killed 346 people. The TAB is made up of aviation experts from the U.S. Air Force, the Volpe National Transportation Systems Center, NASA and FAA.

Boeing has said it is hoping to complete a package of proposed fixes to the jet before the end of the year. It is then subject to approval by FAA and other regulators around the world.

The FAA’s update to Congress is the first public indication of the TAB’s findings.

“The TAB identified several items that need to be completed prior to return to service, including final data submittals and document revisions,” the FAA said in its summary to Congress. The items weren’t identified in the FAA document.

In its summary to Congress, the FAA said it is still in the process of determining how much training pilots on the plane will need before it returns to service. An FAA pilot group as well as a Joint Operations Evaluation Board made up of representatives from the FAA, Europe, Brazil and Canada will evaluate the need for training, according to the summary to lawmakers.

To contact the reporter on this story: Alan Levin in Washington at alevin24@bloomberg.net

To contact the editors responsible for this story: Jon Morgan at jmorgan97@bloomberg.net, Shamim Adam, Ville Heiskanen

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