Boeing 777X has had upgraded GE9X engines installed ready for the first flight to take place early in 2020. Last month a report from Guy Norris of Aviation Week. stated that the upgraded engines had been flown back to Seattle from GE. READ: Air France CEO slams obsolete and problem-prone A380. The engines which arrived back on October 18, incorporated improvements to fix durability problems that were unearthed late in the test program this summer. Norris says "the issue, centred on the stator vanes in the compressor," and forced Boeing to delay the start of flight tests of the 777-9 from July 2019 to early 2020. These pictures below and above are taken by Paineairport.com

The first two engines were installed on the first test aircraft, WH001 and it is expected that the 777X will be powered up about mid-November. Boeing has delayed deliveries of the 777X till early 2021. In the meantime, another delivery of the GE9X engine hit a glitch when a hard landing by the AN124 transporting the engines caused some minor damage. Reports that this is a setback for the program are incorrect and the problem is being fixed in Seattle.