September aircraft parts search activity on Locatory.com rose 34.5% month-on-month, marking the marketplace's busiest month of 2026 as autumn maintenance work accelerated.

Standard hardware and seals moved to the top of both the Top 50 Most Searched and Hardest to Find rankings, accounting for 38.8% of Most Searched parts and 33.3% of Hardest to Find parts. The shift ended four consecutive months of GE90 engine control cluster dominance on the scarcity list, pointing to a more fragmented supply picture heading into Q4.

What changed in September's rankings?

Engine components remained a major demand category, at 30.6% of the Most Searched list and 22.2% of Hardest to Find parts. Cabin and safety equipment represented 15.6% of the scarcity ranking, with electrical and avionics at 13.3%.

FADEC variants (105E70898G1 through G3), HMU control assembly (1693M75P08) and temperature and pressure sensor (0154GF9) no longer appear in September's list. Scarcity no longer clusters around a single engine program.

Locatory.com stated that teams should "bring forward sourcing for repeat-demand items and treat routine hardware as a potential constraint."

Why does standard hardware matter now?

The constrained hardware mix spans bearings (VTB11220P20, 1B7297), screws (60-4156-1, 2291-13), bolts (51U692, 5306-01-231-7363), gaskets (5330011165466, 613U59-0003-2), washers, seals and backup rings.

Standard hardware's share of the Hardest to Find list moved from 12% in July and 16% in August back up to 33.3% in September. The category peaked earlier in the year at 45% in February and 40% in March.

For MROs and airlines, the message is direct: lower-value consumables used across inspections, repairs and component installations can stall work packages just as easily as headline engine components.

How does narrowbody demand fit in?

Sixteen of the 50 Most Searched listings carried Airbus A320 family or Boeing 737 applications. Airbus-related requirements ranged from pin assembly (83647-14-1) and CFM56-5B bolts to landing gear bearings (201587209). Boeing 737 entries included Integrated Drive Generator (761574B), bleed air regulator valves (107492-6) and igniters (518888-1).

Three items active in August stayed in September demand: ignition plug 305766-1, CFM56-5B bolt 83769H16-14 and A320 family landing gear bearing 201587209.

What does the CFM56 aftermarket signal?

GE Aerospace said CFM56 retirements are running at only 1.5% to 2% in 2026, below earlier expectations, with around 2,400 shop visits expected in both 2026 and 2027. Cirium fleet data reinforces the demand picture: nearly 63% of in-service passenger narrowbodies are at least eight years old, including 29.3% more than 15 years old.

AAR reported a 31% year-over-year increase in Parts Supply sales and said it saw "no slowdown in parts bookings or maintenance demand." Locatory.com's search mix shows that a significant slice of buyer activity is reaching down to standard hardware rather than major assemblies.

What should Q4 procurement teams do?

Ten Hardest to Find part numbers repeated from August, and five parts moved from August's Most Searched list to September's Hardest to Find list. That overlap offers procurement teams an early-warning signal before work induction.

The practical priorities are clear:

• Pull forward sourcing for repeat-demand items
• Review exposure to frequently searched part numbers ahead of induction
• Stop treating standard hardware as low priority because of unit value

For suppliers, September's search mix identifies where buyer attention is building before requirements turn urgent. Operators holding the right lower-value material on the shelf stand to capture that demand as Q4 maintenance activity continues to climb.