• Boeing restarted 737 Max production last Friday, Reuters reported.
• It comes nearly a month after a seven-week strike restrained the already embattled planemaker.
• Returning to previous production levels could take months but is key to restoring trust.

Boeing restarted production of its 737 Max aircraft last Friday, nearly a month after a strike that lasted seven weeks, Reuters reported.

A slowdown in 737 Max production this year has annoyed customers — further delaying deliveries of aircraft in an industry hampered by supply-chain constraints.

Getting production back on track will likely go some way to restoring trust with both airlines and regulators. Other issues remain, like achieving certification of the 777X, and a judge rejecting Boeing's plea deal over two Max crashes in 2018 and 2019.

Boeing declined to comment when contacted by Business Insider.

The Federal Aviation Administration limited Boeing's output of the type to 38 a month following January's Alaska Airlines blowout. Boeing had slowed beyond that as it works to overhaul its production practices.

Then, in mid-September, Seattle-area workers represented by the International Association of Machinists and Aerospace Workers (IAM) went on strike. The strike brought 737 Max production to a halt and saw Boeing raise up to $24.3 billion to boost its liquidity.

After tense and protracted negotiations, union members voted to end the strike in early November.

In an October earnings call, CEO Kelly Ortberg said it would likely take a couple of weeks to bring everyone back, given recertification and retraining efforts.

The FAA told Reuters last month that it "will further strengthen and target our oversight as the company begins its return-to-work plan."

Boeing has a backlog of around 5,400 commercial aircraft worth roughly $428 billion. Around 4,700 of those are 737 Max jets.

FAA Administrator Mike Whitaker previously told Reuters that he would be surprised if it took less than multiple months for the company to reach the 38 maximum production limit.

Boeing's share price has dropped 37% since the start of the year. As of 5 a.m. ET, it was up about 0.5% in premarket trading following Reuters' report.