Lycoming IO-540-U1A5D

PMA parts · 1,117

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this engine model on its data sheet, so check the FAA record before relying on it. Newest first.

Query with SQL
duckdb -csv -c "SELECT drs_guid, part_number, part_name, holder, pma_number, replaces_part, supplement_date, tcds_models
  FROM 'https://openairdocs.org/data/latest/faa_type_certificate_pma.parquet'
  WHERE tcds_number IN ('1E4')
    AND len(list_intersect(tcds_models, ['IO-540-U1A5D'])) > 0
  ORDER BY supplement_date DESC, drs_guid DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

AB-160844Spring & Brush AssemblyHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-160844 · Nov 10, 2025OCOil Cooler Preheat KitHartzell Propeller LLC · PMA PQ2040CE · Modification part · Sep 12, 2025AE45BSBrush Rack AssemblyAerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number ALU1045BS · Aug 27, 2025AE943Rotor ShaftAerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number ALU-228 · Aug 27, 2025AE1003Drive End HousingAerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number A2E1003K · Aug 27, 2025AE45BS-1Brush Rack AssemblyAerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number ALU-1045BS · Aug 27, 2025AE944Rotor ShaftAerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number ALE-273 · Aug 27, 2025AE45BS-EBrush Rack AssemblyAerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number ALE-1045BS · Aug 27, 2025AE2241Fan AssemblyAerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number 90-2241 · Aug 27, 2025AE1132Slip Ring End HousingAerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Numbers ALK-1132AS… · Aug 27, 2025SL6Engine Preheat KitHartzell Propeller LLC · PMA PQ2040CE · Modification part · Aug 4, 2025TXPL6Engine Preheat KitHartzell Propeller LLC · PMA PQ2040CE · Modification part · Aug 4, 2025HSSEngine Preheat KitHartzell Propeller LLC · PMA PQ2040CE · Modification part · Aug 4, 2025AA48111-2Oil FilterAero Accessories LLC · PMA PQ1206CE · Replaces Aero AccessoriesAA48111Champion… · Jul 12, 2024201F-5003Fuel PumpHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Lear RomecRG17980D/MLycoming… · Jun 20, 2024ES10-35936-7ScrewHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-35936-7 · Dec 8, 2023AB-92815-37Retaining RingHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-92815-37 · Dec 8, 2023AB-391213ScrewHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-391213 · Dec 8, 2023AB-382788WasherHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-382788 · Dec 8, 2023AB-90788-5Woodruff KeyHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-90788-5 · Dec 8, 2023AB-163374Felt StripHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-163374 · Dec 8, 2023AB-90751-18Cotter PinHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-90751-18 · Dec 8, 2023AB-86527LubricantHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-86527 · Dec 8, 2023AB-50752Felt WasherHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-50752 · Dec 8, 2023AB-391309WasherHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-391309 · Dec 8, 2023AB-14268WasherHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-14268 · Dec 8, 2023AB-53397Washer, FlatHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-53397 · Dec 8, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Dec 1, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Dec 1, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Dec 1, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Dec 1, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Dec 1, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023ES10‐682000‐4HousingHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental Motors10‐682000‐4 · Nov 9, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023No part numberHartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023TA2927-1Engine Preheat KitHartzell Propeller LLC · PMA PQ2040CE · Modification part · Oct 31, 2023TA2927-2Engine Preheat KitHartzell Propeller LLC · PMA PQ2040CE · Modification part · Oct 31, 2023RG-72812GasketReal Gasket TN · PMA PQ1666CE · Replaces 06B21326LW-1330672812 · Aug 29, 2023KA16042HarnessKelly Aerospace Energy Systems LLC · PMA PQ4176CE · Replaces M6042 · May 5, 2023KA12919Ignition Harness AssyKelly Aerospace Energy Systems LLC · PMA PQ4176CE · Replaces M2919 · Oct 27, 2022KA12919Ignition Harness AssyKelly Aerospace Energy Systems LLC · PMA PQ4176CE · Replaces 10-821614-6 · Oct 27, 2022ES-4019LSAlternator AssemblyHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Lycoming 32C21420 · Aug 3, 2022
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