A general view of the inside of a Boeing 777X at Begumpet airport, Hyderabad, India, January 18, 2024. REUTERS/Almaas Masood/File Photo

(Reuters) -Boeing received approval from the U.S. aviation regulatory agency last week to begin the third of five major phases of certification flight tests for its 777-9 wide-body jet, the Air Current reported on Monday, citing sources.

The aviation industry publication added that this would mark the largest single round of evaluations for the long-delayed aircraft program, citing people familiar with its progress.

"We continue to work under the oversight of the Federal Aviation Administration to meet all certification requirements," a Boeing spokeswoman said in an emailed statement to Reuters.

The FAA did not immediately respond to a Reuters request for comment.

The 777X is critical to Boeing's long-term wide-body strategy, previously dominated by its 747 and 777 jets. However, repeated certification and production delays have postponed deliveries by several years, resulting in more than $15 billion in charges and adding pressure to the company's finances.

The setbacks have created an opportunity for rival Airbus and its competing A350 as international travel rebounds.

In its earning report last month, Boeing said it had pushed the first delivery of its long-delayed 777X jet program to 2027 and took a bigger-than-expected $5 billion charge.

Boeing also updated its assessment of the 777-9 certification timeline, and anticipated the jet's first delivery to be in 2027.

Earlier this month, the company received long-awaited approval from the FAA to boost 737 MAX production to 42 aircraft per month, from the previous cap of 38.

(Reporting by Rishabh Jaiswal in Bengaluru; additional reporting by Harshita Meenaktshi; Editing by Sherry Jacob-Phillips)