The 737 MAX 10 (737-10) accounted for "more than 361 orders and commitments from 16 customers" according to the company. It also added a memorandum of understanding from Chinese domestic Riuli Airlines for 20 737 MAX 8 aircraft.
"Boeing has been a proud partner of Malaysia Airlines for more than 40 years and we are honored they are joining the 737 MAX 10 launch group", said Ihssane Mounir, senior vice president, Global Sales and Marketing, Boeing Commercial Airplanes.
After years of booming orders driven by increased air travel and more fuel-efficient planes, passenger jetmakers are bracing for a slowdown in demand while they focus on meeting tight delivery schedules and ambitious production targets.
Of the latest batch to be ordered, five will be delivered in the first half of 2019, with the second five scheduled to arrive a year later.
The company thus became the first Boeing 737 MAX operator in Romania.
Boeing unveiled plans for its new Dreamliner jet - dubbed the "797" - at the Paris Air Show on Tuesday. The A321 is larger than any previous member of the 737 family, an important gap in the minds of some airlines that the larger-capacity MAX 10 is meant to address.
United has flown almost every version of the 737 that Boeing has produced.
Low-priced airline Blue Air ordered yesterday six Boeing 737 MAX aircraft and retains the right to buy two more aircraft under the same conditions.
Numerous orders for Boeing's new 737 Max 10 model are conversions from previously ordered Boeing jets of other styles, The Wall Street Journal reported from the Paris Air Show.
Leahy also said that the gap with Boeing was smaller than it seemed when looking only at signed orders, rather than initial announcements. With aerodynamic improvements, Airbus said the aircraft would be 13% cheaper to operate on a per-seat basis from current models.
USA aircraft manufacturing company Boeing outdone French rival Airbus with the most orders at the 52 International Paris Air Show this week.
Separately, Delta boosted an order for Airbus's A321 by 10 planes.
Boeing's 737 Max 10, rolled out to combat Airbus's hot-selling A321neo, has secured $30 billion in commitments alone at the show.
Such a cross-section will reduce the overall size of the jet at the cost of cutting the available cargo space below the passenger cabin.