Changes in aftermarket searches throughout the first half of the year showcase where parts shortages are most concentrated and how demand shifts with the seasons.

According to experts from Locatory.com, “Spring reflected market conditions where many operators were becoming more selective, delaying non-urgent purchasing where possible and prioritizing material linked to active maintenance events or near-term operational risk.”

They continue, “As summer approached, that behavior changed. Higher flying schedules reduced the room for waiting, which pushed more procurement activity back into the market.”

“When utilization is lower or planning windows are longer, demand can stay more controlled,” note Locatory.com experts.

They add, “When aircraft are needed back in service faster, the same supply base is tested more aggressively. The first half of 2026 showed that aftermarket pressure was not only about whether parts were available, but about when operators could no longer afford to wait.”

“Understanding which components are becoming difficult to source enables procurement teams to identify supply-chain risks earlier, make more informed sourcing decisions and reduce the likelihood of maintenance delays or AOG events,” explain experts from Locatory.com

This article explores the hardest-to-find parts in the aviation industry from June 2026.

How hard to find were electrical and avionics components in June 2026?

Locatory.com reports state, “Electrical, power, APU, and avionics components represented the largest global shortage category in June, accounting for 28% of hardest-to-find parts, compared with 16% in North America.”

These reports identify four core areas that encompass the most constrained electrical, power and avionics components globally in June 2026:

• Electronic assemblies: Circuit Card Assembly (PN: 33782-2, 33782-1) for Boeing fleets, and Motor Driven Variable Resistor (PN: U-307133).
• Sensors and transmitters: Position Transmitter (PN: 306-202788-001) for UH-60A and H-60 helicopters, and Transmitter (PN: 70450-01043-120) for UH-60A helicopters.
• Wiring and electrical distribution: Cable Assemblies (PN: AA4056-1, UA-1409-01) for Sikorsky helicopters.
• Supporting electrical hardware: Valve and Sleeve (PN: 17030028) for Embraer E-Jets and Bombardier CRJ Series, and Potentiometer (PN: 70301-02109-102) for Sikorsky helicopters.

In North America, the hardest-to-find parts in this category for the same time period include:

• Sensors (PN: 0154GF9, 20301-0134, 351-702-801-0, 351-702-803-0)
• Gauges (PN: 30-2109074-00)
• Switch (PN: 90-48401-7) for A330 and A340 fleets
• Cable Assembly (PN: 284T1015-1)
• Branch (PN: 325-021-701-0)

Which parts were hardest to find globally in June 2026?

How hard to find were airframe and landing gear components this June?

While electrical, power, APU and avionics-related parts show the most June 2026 constraints globally, the hardest-to-find components in North America emerge as airframe and landing gear components.

These parts make up 44% of shortages in North America and 18% across the globe, with access and structural assemblies making up most of the constrained parts.

The biggest North American shortages of airframe and landing gear components for this month include:

• Door Landing Component (PN: CC670-33151-6S) for Bombardier CRJ700, CRJ900, and CRJ1000 aircraft
• Latch Assemblies (PN: 0FV9900A11G02, 0YZ1510A01G03, 131W1660-1103) for Boeing aircraft
• Nose Wheel Well Door (PN: 412Z6103-1)
• Beam (PN: 313T2380-481) for B767
• Rail Inboard (PN: 170-39142-005) for ERJ-170
• Tube Assemblies (PN: 113T1910-90, 171-18782-401)
• Brake (PN: 2608892-1A)
• Tie Rods (PN: ABS1263A72600WG) for the A320 family

Globally, there were also shortages for helicopter-specific support components in June 2026, such as:

• Fitting Assembly (PN: 70219-02116-055)
• Valve (PN: 70351-08165-105)
• Blade BIM Indicators (PN: 1201-406-2011,  S6115-20520-1)
• Weight Assembly (PN: 70107-08404-044)
• Tee Charging (PN: 727404)
• Single Leg Wire Rope Assembly (PN: BL-10653-3)

Which engine components were hardest to find in June 2026?

According to reports from Locatory.com, “Engine components represented 24% of global hardest-to-find parts and 28% in North America. The strongest constraint in both datasets centered on GE90-powered Boeing 777 engine control systems.”

The reports continue, “June's engine shortages were driven by high-value control and fuel management components rather than rotating hardware.”

In both data sets, the following parts show similar constraints for June 2026:

• Full Authority Digital Engine Control (FADEC) units (PN: 105E70898G1, 105E70898G2, 105E70898G3, 105E7090G9, 105E7090G12, 105E7090G13, 114E6791G3)
• Hydromechanical Units (HMU) (PN: 1693M75P08, 1851M65P05, 8061-918)
• Rotor (PN: 2923151-102) for Boeing 777 aircraft
• Core Compartment Cooling Valve (PN: 5010759-101) for Boeing 777 aircraft

Global shortages also occurred with engine-related parts like:

• Fuel Valve (PN: 45905-2)
• Pump Manifold (PN: 62599)
• Filter Housing Assembly (PN: AA-A698-1D2A)

“The repeated appearance of GE90 FADEC units and HMUs across both datasets suggests a structural supply constraint affecting Boeing 777 operators, where limited repair capacity and stringent traceability requirements continue to restrict availability,” note the reports.

Which parts were hardest to find in North America in June 2026?

What were June 2026 constraints like for standard hardware components?

Data from Locatory.com shows standard hardware and seals making up 20% of global hardest-to-find parts and 10% in North America.

Locatory.com reports explain, “Components within standard hardware category shifted month to month, as each engine shop visit, structural inspection and heavy maintenance event consumes large volumes of seals, fasteners and consumables that cannot easily be substituted.”

Focused on fasteners and retaining hardware, global shortages for the month include parts like:

• Turnlock Fastener Ejector Spring (PN: 214A830-1)
• Stud Assemblies (PN: 12616965-1, PN: 1128000-3)
• Bolts (PN: 70103-08801-101, PN: SS27576-5-16)
• Screw (PN: 40-48-10R25)
• Quarter-Turn Stud (PN: 28S14-3)
• Packing Retainer (PN: 6257320)

In contrast, North American shortages in June 2026 center on:

• Bearing (PN: 219678-1)
• Washer (PN: 47138-2)
• Bracket Support (PN: 612C9505-009)

How constrained were cabin and safety components in June 2026?

Similar to the last Parts Report on May 2026 data, cabin and safety components represented the smallest category of difficult-to-find parts.

In North America, these types of parts accounted for 2% of constrained searches, with the Light Assembly (PN: 0447LS13-087-02) for Airbus A320 / A330 family being one of the hardest to source in both datasets.

Making up 10% of constrained parts globally, the hardest-to-find cabin and safety components around the world for June 2026 were mainly light components with the following part numbers:

• PN: 70553-01108-103
• PN: S1910-303
• PN: 70553-01107-101

Locatory.com reports share, “While engine components captured the headlines in search volume, standard hardware was consistently the hardest category to find, averaging just under 30% of global hardest-to-find listings across the first half, ahead of engine parts at roughly 21% and electrical, power related components at roughly 22% percent."

They note, "Cabin and safety items were not far behind, representing around 14% of the total hardest-to-find category mix.”