As the autumn maintenance season enters full swing, September shows some of the busiest aftermarket parts search activity of the entire year, rising 34.5% from August.

Most of this demand is aligned in both North American and global datasets, with a few components standing out in each.

According to Locatory.com reports, “Because these differences come from a relatively small group of items from the Top 50, the September findings should not be interpreted as two fundamentally different demand profiles. North American demand is highly consistent with the wider sourcing pattern.”

They continue, “Global list unique parts include four Boeing 737 engine accessories and an integrated drive generator, which is why engine components and electrical items run higher globally.”

“North America's unique quotes include five fasteners and bushings, which is why standard hardware runs higher there, plus a B787 heater assembly and one compressor diffuser,” add the reports.

These are the Most Searched Part Numbers unique to each region:

Why did standard hardware and seals make up the largest Most Searched category in September 2026?

As the category with the largest concentration of Locatory.com searches in September 2026, standard hardware and seals showcase how rising demand for standard material matches the transition into a more maintenance-intensive season.

Locatory.com reports note, “Heavy maintenance season does not create demand for one specific component. It creates requirements across large numbers of relatively routine parts.”

These parts include:

• Fasteners removed during access
• Seals and gaskets replaced during reassembly
• Bearings inspected or changed
• Hardware consumed across multiple systems

The most highly searched standard hardware and seals from September 2026 are:

• Rivets (CR3522-5-03 and CR3524-6-03)
• Pin-rivet collar (BACC30M6)
• Bolts (D5537002021000, BACB30PN14-32M and A32266)
• Nuts (S700N1518, 52U629, BH01227-08L and BACN11R3)
• Gaskets (2330-0055 and 771884)
• Seal (2256M75P01)
• Washer (208501-89)
• Spring (975101-10)
• Pin (30-2121003-00)

How highly searched were engine components in September 2026?

At 31% of the global Top 50 searches and 25% of those in North America, engine components are the second-largest search category for the month.

Instead of stark differentiations between North American and global datasets, engine components highlight demand by different types of aircraft platform. Eight of these parts were also on August's Global Most Searched list.

The highest searched engine components for narrowbody platforms include:

• CFM56-5B bolt for the Airbus A320 family (83769H16-14)
• B737 transducer (1680-654)
• B737 temperature sensor (3171784-9)
• A320 family inlet cowl assembly (642-1000-49)

The data also shows high search demand for widebody and regional high-demand items, such as:

• Cable (491B1220017-029) compatible with the B767 and B747
• LPT stage 3 blade (50N203) compatible with the B767 and B747
• ERJ-190 rear engine mount bolt (2093M29P02)
• B757 ignition plug (305766-1)
• Tie bolt (2613109)
• Seal (167446-200) and a pump assembly (63508412-1)

What was search data like for avionics and electrical components in September 2026?

According to Locatory.com reports, “Electrical and avionics represented 14% of Global Most Searched parts and 12% in North America.”

Across both lists, the most highly searched electrical and avionics components show up as:

• TCAS upper antenna (622-8973-001)
• Boeing 737NG solenoid electrical assembly (63000933-1)
• Multi-function radar display (80-5204-13-5)
• Resolver (4039572-5)
• Boeing 737NG diode pack (763226-14)
• Relay (N130-6520)

How frequently searched were parts and materials like airframe, landing gear, cabin and chemicals?

Showing the lowest demand for September 2026, airframe/landing gear components, cabin/safety components and chemicals make up small shares of global and North American searches.

The same five airframe and landing gear components appear in both lists of Top 50 searches for September 2026:

• Pin assembly for the A320 family (83647-14-1)
• 737 bearing (DAS10-26B1-504)
• A320 family pipe (744A1200-02)
• Landing gear bearing for the A320 family (201587209)
• Rudder damper assembly (FE205-000)

For cabin and safety components, both the global and North American top searches include:

• Boeing smoke hood protective breathing equipment unit (E28180-20-0006)
• Spindle (2842114-1)

A chemical product also appears once on each list: repair filler (675W0003-1).

Locatory.com experts state, “With September closing Q3 at the highest search volume recorded in Locatory.com 2026 data, the key question for the final quarter is whether this broader pattern persists.”

They add, “Continued marketplace reports will track these indicators, showing where demand is building, which shortages are becoming recurring and where buyers and suppliers may need to plan earlier, widen supplier coverage or adjust sourcing strategies.”