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Lycoming AEIO540-L1B5D

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Engine model · Reciprocating · 300 hp · registry code 41791

Manufacturer (registry)
LYCOMING
Model
AEIO540-L1B5D
Registry code
41791
Installed in
41 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 · 14

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

1983In forceSuperseded2026
See all 24 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 ('41791'))
  ORDER BY coalesce(d.effective_date, d.publication_date, d.issue_date) DESC, d.ad_number DESC"

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Information bulletins that may apply · 6

Historical bulletins · 2
SAIB NE-08-26R1Dual MagnetosIssued Jul 8, 2008SAIB NE-08-32Propeller Governor Set ScrewIssued Jul 3, 2008
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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 ('41791'))
  GROUP BY s.saib_number ORDER BY issue_date DESC"

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Registered aircraft · 41

N102EXWoods Farrell T · Hudson, NHBuilt 1989 · S/N 007N125FRBuckspan Brandon M · Longmont, COBuilt 1986 · S/N 125N130EPHolt Kristopher T · Wichita, KSBuilt 1985 · S/N 41
See all 41 registered aircraft
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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 ('41791')
  ORDER BY n_number"

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NTSB investigations · 3

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 3 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

NTSB WPR23FA223Accident · 2 fatalClass 3 · FieldFinal reportCompagnie Daher TB 30 Epsilon · Apache Junction, AZThe pilot’s controlled flight into the mountainous terrain due to diminished depth perception as a result of the shadowing effect from the sun’s position. Contributing to the accident was the decision by all three pilots to fly low altitude around the…Jun 10, 2023 · N759F · DestroyedNTSB CEN20LA017Accident · Serious injuriesClass 3 · LimitedFinal reportSocata TB 30 Epsilon · Kalamazoo, MIA total loss of engine power for undetermined reasons, which resulted in an aerodynamic stall during the pilot’s attempted forced landing at low altitude and impact with terrain.Nov 1, 2019 · N50TB · Substantial damageNTSB WPR10LA454Accident · No injuriesLimited investigationFinal reportExtra Flugzeugbau EA-300 · Sierra Vista, AZA loss of engine power due to metal debris contamination of the inverted oil system shuttle valve, which resulted in a disruption of oil flow and subsequent oil starvation.Sep 11, 2010 · N102EX · 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 ('41791')
  ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"

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FAA incident reports · 5

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

Incident 20250501005329ISocata TB 30 Epsilon · Frederick, MDOn may 1, 2025, at 16:30 UTC, the nose landing gear of a Socata TB30 epsilon (N616MM) collapsed upon touchdown on runway 12 at Frederick airport (kfdk). The aircraft had one pilot and one passenger on board. Prior to landing, the pilot reported a possible…May 1, 2025 · N616MM · Minor damageAccident 20230610007769ACompagnie Daher TB 30 Epsilon · Apache Junction, AZOn June 10th, 2023, three similar aircraft (socata TB-30 epsilon) departed falcon field (ffz) in mesa, AZ for a scenic flight. The three aircraft departed ffz as a flight of three. The flight departed north bound from rwy 4 then heading north and east bound…Jun 10, 2023 · N759F · Destroyed · 2 fatalAccident 20191101018989ASocata TB 30 Epsilon · Kalamazoo, MIOn Friday, November 01, 2019 at approximately 1635 eastern daylight saving time (2035 z) a 1985 Socata TB-30 epsilon aircraft, N50TB, was substantially damaged during impact with terrain following a loss of power shortly after takeoff from runway 27 at the…Nov 1, 2019 · N50TB · Substantial damageAccident 20100911046749AExtra Flugz EA-300 · Sierra Vista, AZAircraft lost engine oil pressure and engine seized after performing inverted flight, aerobatic maneuvers. The aircraft landed on highway 90 and a car hit the left wing resulting in substantial wing damage.Sep 11, 2010 · N102EX · Substantial damageIncident 20100522036209IMoravan A S Z-50 LE · Springerville, AZPilot was attempting to land on rwy 29 with a crosswind. Wind was gusting to 25 plus according to pilot. During landing rollout the aircarft began to weathervane and pilot could not correct with controls. Aircraft ground looped and nosed over causing minor…May 22, 2010 · N250LE · Minor 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 ('41791')
  ORDER BY event_date DESC, report_number DESC"

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Service difficulty reports

No reports name this modelGeneral aviation reporting is voluntary.

STCs that may be installed · 17

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 17 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 ('41791')
    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"

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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, ['AEIO-540-L1B5D'])) > 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.