Locatory.com tracked the hardest-to-find aircraft parts in July 2026, and Aviation Pros published the results on September 10. Engine and fuel control parts held the largest share at 31 percent. Locatory reported the same constraints in both its global and North American lists.

Airframe and landing components made up 26 percent of the hardest-to-find parts. Electrical, avionics and sensor parts accounted for 17 percent and cabin, safety and interior parts for 14 percent. Standard hardware and seals made up 12 percent, the smallest share. That category stood at 20 percent in June 2026, when it was the third-largest.

The engine category concentrated on GE90 and Boeing 777 parts. Listed items included the hydro mechanical fuel control unit, FADEC, hydromechanical unit, starter valve assembly and oil level sensor assembly. The sensor category also included a temperature and pressure sensor for the GE90 and 777.

Aviation Pros added context on the GE90 fleet. GE reported in May 2026 that about 70 percent of the GE90 fleet had not yet had a second shop visit, and that second visits typically involve about 50 percent more work than first visits. Over the previous 12 months, GE's Commercial Engines and Services internal shop visit revenue rose about 30 percent and spare parts revenue rose more than 25 percent. Boeing has confirmed the 777X will not enter service until 2027, which keeps 777-300ER and 777F aircraft in service longer.

Locatory describes the pattern as a systemic availability issue across regions.

Source: Aviation Pros - https://www.aviationpros.com/aircraft-maintenance-technology/engines-parts/article/55403854/parts-report-the-hardest-to-find-aircraft-parts-of-july-2026