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Lycoming IO-540-L1C5

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Engine model · Reciprocating · 300 hp · registry code 41782

Manufacturer (registry)
LYCOMING
Model
IO-540-L1C5
Registry code
41782
Installed in
18 registered aircraft
Type
Reciprocating
Power
300 hp
Data sheet
TCDS1E4
Holder
Lycoming Engines

Model codes come from the FAA registry’s reference file.

On this page

Airworthiness directives that may apply · 18

ADs whose products match this engine model. Each AD’s applicability may narrow it by serial number, part number or configuration.

1977In forceSuperseded2026
See all 29 ADs
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duckdb -csv -c "SELECT d.ad_number, d.status, d.subject, d.effective_date
  FROM 'https://openairdocs.org/data/latest/faa_directive.parquet' d
  WHERE d.ad_id IN (SELECT ad_id FROM 'https://openairdocs.org/data/latest/faa_engine_model_directive.parquet' WHERE engine_model_code IN ('41782'))
  ORDER BY coalesce(d.effective_date, d.publication_date, d.issue_date) DESC, d.ad_number 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.

Information bulletins that may apply · 6

Historical bulletins · 1
SAIB NE-08-32Propeller Governor Set ScrewIssued Jul 3, 2008
Query with SQL
duckdb -csv -c "SELECT s.saib_number, any_value(s.title) AS title, max(s.issue_date) AS issue_date, any_value(s.status) AS status
  FROM 'https://openairdocs.org/data/latest/faa_saib.parquet' s
  WHERE s.saib_id IN (SELECT saib_id FROM 'https://openairdocs.org/data/latest/faa_engine_model_saib.parquet' WHERE engine_model_code IN ('41782'))
  GROUP BY s.saib_number ORDER BY issue_date 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.

Registered aircraft · 18

N25YY5c Aviation LLC · Scottsdale, AZBuilt 2020 · S/N L2K-196N377SXColberg Chad W · Port Orange, FLBuilt 1991 · S/N 77N38SXJohns William L · Paola, KSBuilt 2007 · S/N 0038
See all 18 registered aircraft
Query with SQL
duckdb -csv -c "SELECT n_number, serial_number, year_manufactured, status, registrant_name, registrant_city, registrant_state
  FROM 'https://openairdocs.org/data/latest/faa_aircraft_registration.parquet'
  WHERE engine_model_code IN ('41782')
  ORDER BY n_number"

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.

NTSB investigations · 5

Aircraft matched to this engine model through the registry, by N-number and event date, checked against the reported serial number, make and model.

Defining event, 2008 on

Of 2 cases NTSB coded with a defining event. All defining events

In the probable cause, 2008 on

Findings NTSB made part of the probable cause. A case can have several. All findings

First occurrence, 1982 to 2007

Of 3 cases with NTSB’s older coding, defined in its coding manual.

NTSB WPR14CA372Accident · Minor injuriesData collectionFinal reportFound Acft Canada FBA 2C1 · Cascade, IDThe pilot's failure to maintain directional control during landing.Sep 11, 2014 · N500FA · Substantial damageNTSB ANC14CA032Accident · No injuriesData collectionFinal reportFound Acft Canada FBA 2C2 · Willow, AKThe pilot's loss of control of the airplane during landing on water due to an encounter with wind shear, which resulted in the airplane's abnormal contact with the surface.May 31, 2014 · N602BC · Substantial damageNTSB LAX08CA041Accident · Minor injuriesData collectionFinal reportFound Acft FBA-2C2 · Holbrook, AZThe pilot's failure to maintain directional control during landing rollout, which resulted in an inadvertent ground loop.Dec 22, 2007 · N418MS · Substantial damageNTSB DEN07CA126Accident · No injuriesData collectionFinal reportFound Aircraft Canada FBA-2C2 · Crested Butte, COThe pilot's failure to maintain directional control during the landing roll.Jul 21, 2007 · N602BC · Substantial damageNTSB SEA07LA075Accident · No injuriesLimited investigationFinal reportFound Aircraft Canada FBA-2C2 · Reno, NVThe certified flight instructor's failure to maintain directional control of the airplane during landing, which resulted in a groundloop.Mar 11, 2007 · N418MS · Substantial damage
Query with SQL
duckdb -csv -c "SELECT c.\"ntsbNumber\", c.\"eventDate\", c.\"eventType\", c.\"eventCity\", c.\"eventStateOrRegion\", a.n_number, a.\"aircraftMake\", a.\"aircraftModel\", c.\"highestInjuryLevel\", c.\"totalFatal\", c.\"completionStatus\", c.report_url
  FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c.\"mKey\" = a.case_mkey
  WHERE a.engine_model_code IN ('41782')
  ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" 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.

FAA incident reports · 6

Matched to this engine model through the registry, by N-number and event date, checked against the reported make and model.

Accident 20140911016169AFound Acft Canada FBA-2C1 · Cascade, IDUpon touch down and landing rollout, the airman lost directional control while landing in a cross wind and departed the runway striking a fence post, becoming airborn again before stalling and impacting the ground in a steep right bank.Sep 11, 2014 · N500FA · Substantial damageAccident 20140531009509AFound Acft Canada FBA-2C2 · Willow, AKOn a southbound heading approach to Willow lake , encountering windy conditions from the south, wind conditions increased/became gusty as the aircraft was crossing over from above the trees to above the water's surface. At 40-50 feet above water's surface,…May 31, 2014 · N602BC · Substantial damageIncident 20090608012039IAmtr SX300 · Ramona, CA(-23) On June 8, 2009 N38SX, an amateur built aircraft, model SX300, entered right traffic runway 27, Ramona Airport for landing. The pilot reported on base leg the nose gear was not indicating down and locked. He requested a low approach for visual…Jun 8, 2009 · N38SX · Minor damageAccident 20071222830109AFound FBA2C2 · Holbrook, AZ(-23) On December 22, 2007, at approximately 1330 MST, a canadian built Found aircraft FBA-2C2 (bushhawk xp), N418MS, with the pilot [privacy data omitted] performing as pilot in command, crashed while attempting to land on runway 21 at Holbrook airport…Dec 22, 2007 · N418MS · Substantial damageAccident 20070721015499AFound FBA2C2 · Crested Butte, CO(-23) Aircraft landing runway 32, touched down on the first few hundred feet of the runway, the airplane hopped a few times on runway, veered off to the left and off the runway, went down a slight embankment and spun around. Aircraft sustained severe damage.Jul 21, 2007 · N602BC · Substantial damageAccident 20070310004149AFound FBA2C2 · Reno, NV(-23) During a telephone interview conducted on March 12, 2007, with the pilot, [privacy data omitted] he stated that he was demonstrating an ILS approach for the owner of the aircraft whom was receiving instruction. The CFI pilot [privacy data omitted]…Mar 10, 2007 · N418MS · Substantial damage
Query with SQL
duckdb -csv -c "SELECT report_number, event_date, event_type, city, state, aircraft_make, aircraft_model, aircraft_damage, fatal_injuries, n_number
  FROM 'https://openairdocs.org/data/latest/faa_incident_report.parquet'
  WHERE engine_model_code IN ('41782')
  ORDER BY event_date DESC, report_number 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.

Service difficulty reports

No reports name this modelGeneral aviation reporting is voluntary.

STCs that may be installed · 41

Approved for this engine model: the STC’s model list names it on its data sheet, or a series that includes it. The registry doesn’t record which STCs an aircraft has.

STC SE00825WIInstallation of Specialty Products Spin-on oil filter on Lycoming Engines.B & C Specialty Products Inc.STC SE04349CHInstallation of SureFly electronic ignitionSureFly Partners Ltd.STC SE01954SEInstallation of engine crankcase seal.Ly-Con Rebuilding Company
See all 41 STCs
Query with SQL
duckdb -csv -c "SELECT s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model
  FROM (
    SELECT stc_number, min(matched_model) AS matched_model
    FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet'
    WHERE engine_model_code IN ('41782')
    GROUP BY stc_number
  ) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number)
  ORDER BY s.status = 'Current' DESC, s.status_date DESC, s.stc_number"

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.

PMA parts · 1,000+

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.

ES66M19385Clamp, MagnetoHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 66M19385 · Nov 10, 2025ES10-400567Bearing, BallHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-400567 · Nov 10, 2025ES10-349249Washer, BowedHartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349249 · Nov 10, 2025
See all 1,000+ PMA parts
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-L1C5'])) > 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.