U.S. imports of Aircraft Spark-Ignition Reciprocating & Rotary Internal Combustion Piston Engines (HS 840710) totaled $8.7M in August 2026, imported from 23 countries.
Importers of Aircraft Spark-Ignition Reciprocating & Rotary Internal Combustion Piston Engines paid $103K in duties in August 2026, an average duty rate of 1.18% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataImported under HTS heading 840710, these aircraft piston engines are split across four 10-digit lines by power output — below 373 kW (8407100020), at or above 373 kW (8407100040), used engines (8407100060), and non-civil aircraft engines (8407100090). Canada leads US supply, with Austria and Switzerland also prominent sources reflecting the strong European general-aviation engine manufacturing base (notably Rotax and Lycoming-type competitors). Importers should confirm FAA airworthiness documentation and bilateral aviation safety agreement coverage, as these requirements are separate from CBP entry formalities.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
86 import shipments a month
The schedule provides a dedicated line (8407100060) for used spark-ignition aircraft engines, which may carry a different duty rate than new engines classified under 8407100020 or 8407100040. Importers should verify the condition of the engine at time of entry and document it accordingly to avoid misclassification.
The 373 kW (500 hp) breakpoint separates lighter general-aviation and experimental aircraft engines (8407100020) from higher-powered turboprop-replacement or heavy piston engines (8407100040). Correct power rating documentation from the manufacturer is essential, as misclassification between these lines can affect duty liability and statistical reporting.
Subheading 5 of 8 in heading 8407
Subheading 840710 · $8.7M of $1.0B
ImportsExports
Imports
$8.7MYoY · free account
Exports
$2.1MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $82.2M of Aircraft Spark-Ignition Reciprocating & Rotary Internal Combustion Piston Engines and exported $122.4M.
Through August 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8407100090 | Spk-Ign Rec or Rot Int Com Pst Typ A/C Eng Exc Civ | $4.1M | 2.02% | 22.09% | $83K |
| 8407100060 | Spk-Ign Recip or Rot Int Comb Pst A/C Eng, Used | $3.0M | 0.12% | 1.17% | $4K |
| 8407100040 | Spk-Ign Recip or Rot Int Comb Pst A/C Eng, Gt 373kw | $1.1M | 0.00% | 44.37% | -- |
| 8407100020 | Spk-Ign Recp or Rot Int Comb Pst A/C Eng, Lt 373kw | $514K | 3.08% | 15.57% | $16K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8407100090 | Spk-Ign Rec or Rot Int Com Pst Typ A/C Eng Exc Civ | $2.1M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · August 2026
origin
Austria and Canada together supply 74% of it. Australia pays 11.0% duty; Austria 0.0%.
customs district
destination
entry
rate provision · imports
82.8% enters free of duty; duty collected equals 1.18% of imports for consumption.
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