Boeing is selling its 737 Max planes again. The company announced at the Paris Air Show on Tuesday that International Airlines Group (IAG), the parent company of British Airways and other carriers, signed a letter of intent for 200 Boeing 737 aircraft.

The letter of intent with IAG marks Boeing's first sale of the jet since the crash of an Ethiopian Airlines 737 Max in March. Another 737 Max crashed in Indonesia last year, and the planes are now grounded amid an investigation into problematic software.

The letter is subject to final agreement but is a vote of confidence in Boeing as it struggles to win back trust. The planes would be delivered between 2023 and 2027 to airlines owned by IAG. The combination of 737-Max 8 and 737-Max 10 planes would cost $24 billion at list prices, though companies usually strike deals for discounts.

Get Breaking News Delivered to Your Inbox

IAG expressed confidence that regulators will allow amended Max jets to fly again soon. The Ethiopian Airlines and Lion Air crashes killed 346 people.

Analysts had predicted that Boeing might try to announce some Max orders at the air show to demonstrate that the plane — one of Boeing's most popular models — still has support.

Visitors walk past an Boeing 737-800 BCF Amazon "Prime Air" cargo plane at Paris Air Show, in Le Bourget, east of Paris, France, Tuesday, June 18, 2019. Michel Euler / AP

After a lackluster start to the Paris Air Show, Boeing's orders picked up Tuesday. It announced a deal with Korean Air and Air Lease Corporation for a total of 30 long-range 787 jets, and worth $6.3 billion at list prices.

Boeing will also lease 15 Boeing 737-800 cargo aircrafts to Amazon as part of the e-commerce giant's Amazon Air partnership with GE Capital Aviation Services (GECAS), adding to the five aircrafts already leased by GECAS.

"These new aircraft create additional capacity for Amazon Air, building on the investment in our Prime Free One-Day program," Dave Clark, Senior Vice President of Worldwide Operations at Amazon, said in a press release. "By 2021, Amazon Air will have a portfolio of 70 aircraft flying in our dedicated air network."

Airbus also announced several orders Tuesday, including from IAG.