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Lycoming IO-540-K1G5D

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Engine model · Reciprocating · 300 hp · registry code 41598

Manufacturer (registry)
LYCOMING
Model
IO-540-K1G5D
Registry code
41598
Installed in
52 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 · 24

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 35 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 ('41598'))
  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 · 7

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 ('41598'))
  GROUP BY s.saib_number ORDER BY issue_date DESC"

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Registered aircraft · 52

N104WHGreycal Enteprrises Inc · Lake Mary, FLBuilt 2005 · S/N 3232046N121JTEffingham Eta LLC · Effingham, ILBuilt 2005 · S/N 3246231N142BWSzabo Aerospace LLC · Naples, FLBuilt 2006 · S/N 63
See all 52 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 ('41598')
  ORDER BY n_number"

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NTSB investigations · 10

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 8 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 1 case with NTSB’s older coding, defined in its coding manual.

NTSB ERA24LA259Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-32R-300 · Selma, ALThe pilot receiving instruction’s improper landing flare which resulted in a hard landing and subsequent landing gear collapse.Jun 12, 2024 · N62LP · Substantial damageNTSB GAA19CA174Accident · No injuriesData collectionFinal reportPiper PA32R · Atmautluak, AKThe airplane's encounter with a snow-covered pothole during taxi.Mar 21, 2019 · N5544F · Substantial damageNTSB CEN18LA077Accident · Serious injuriesClass 3 · LimitedFinal reportBryk Steven L Velocity XL RG · Santa Fe, NMThe airplane’s inadvertent encounter with unforecasted icing conditions during cruise flight, which resulted in the accumulation of airframe icing, the airplane’s inability to maintain altitude, and a subsequent forced landing on rough terrain.Jan 16, 2018 · N787SB · Substantial damageNTSB CEN16FA278Accident · 2 fatalField investigationFinal reportHarris-Runyan Skybolt 300 · Fairmont, OKThe pilot's delay in recovering from an aerobatic maneuver resulting in collision with terrain.Jul 21, 2016 · N511GS · Substantial damageNTSB CEN16FA241Accident · 1 fatalField investigationFinal reportBoeve Earl Seawind · Buena Vista, COThe pilot's failure to maintain control of the airplane during a forced landing following a partial loss of engine power, which resulted in a hard landing and nose over. The reason for the loss of engine power could not be determined due to the severity of…Jul 4, 2016 · N46EB · DestroyedNTSB ERA15LA019Accident · No injuriesLimited investigationFinal reportPiper PA32 301FT · Winona, MSA loss of directional control during takeoff for reasons that could not be determined because postaccident examination of the airplane revealed no anomalies.Oct 16, 2014 · N106C · Substantial damageNTSB ERA12CA464Accident · No injuriesData collectionFinal reportPiper PA32-301FT · Brevard, NCThe pilot’s failure to execute a go-around following an approach that was high and fast, which resulted in a runway overrun.Jul 16, 2012 · N813TC · Substantial damageNTSB CEN10CA375Accident · No injuriesData collectionFinal reportPiper PA32 · Albuquerque, NMThe pilot's failure to maintain directional control of the airplane during takeoff.Jul 6, 2010 · N106C · Substantial damageNTSB CHI84LA120Accident · Minor injuriesLimited investigationFinal reportPiper PA-32RT-300 · Lima, OHHeavy wet snow was falling on the day of the accident. The plt reported that he cleared snow off the wings of the acft, but not off the horizontal surface of the t-tail. Also he reported, a considerable amount of slush remained on the rwy which was thrown up…Feb 25, 1984 · N30026 · Substantial damageNTSB DEN78FQD33Accident · No injuriesClosedPiper PA-32R · Timberon, NMAug 26, 1978 · N5544F · 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 ('41598')
  ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"

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FAA incident reports · 27

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

Accident 20240612007599APiper PA-32R-300 · Selma, ALPilot was condicting a crosswind landing at Selma airport (sem) when the aircraft landed hard onto the runway with a drift componant. Moments later, as the touchdown roll out began, the right main landing gear collapsed.Jun 12, 2024 · N62LP · Substantial damageIncident 20230617006269IPiper PA-32R-300 · Montgomery, ALPilot states that while on approach to greenville airport, he did not observe a safe gear extension configuration. After initial troubleshooting and coordination with mgm ATC, he attempted to land on runway 21 at kmgm. On touch down, the main landing gear…Jun 17, 2023 · N516BZ · Minor damageIncident 20230303001509IPiper PA-32R-300 · Bethel, AKDuring approach to kasiglik, PIC experienced a right MLG unsafe light upon gear extension. Recycling of gear resulted in same right MLG unsafe light. PIC diverted to Bethel and performed an Emergency checklist procedure for emergency gear extension. Right MLG…Mar 3, 2023 · N919BS · Minor damage
See all 27 incident reports
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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 ('41598')
  ORDER BY event_date DESC, report_number DESC"

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Service difficulty reports · 42

SDR 2025FA0000207Intake Duct · incorrectAIRCRAFT DEPARTED AIRPORT AND AFTER APPROXIMATELY 10 MINUTES INTO FLIGHT, AIRCRAFT HAD LEVELED OUT AT CRUISE ALTITUDE OF 7,000 FEET. AIRCRAFT EXPERIENCED A LOSS OF POWER WHICH RESULTED IN THE AIRCRAFT IMPACTING THE GROUND ON ITS BELLY AND SLIDING SIDEWAYS INTOOct 17, 2024 · N81481 · Piper PA32R301 · Engine Air Intake SystemSDR 2023FA0000789Hub · leakingPROPELLER MODEL B3D34C433-C , RED DYED OIL COMING FROM BLADE HUB, ON COWLING , WIND SCREEN AND PUDDLE ON HANGER FLOOR. PROP OVERHAUL DATE 12/ 2018 T.T. 604 HRS, DISASSEMBLED AND RESEALED 3/2022 T.T. 900 HRS, LEAKAGE REAPPEARED ON 11/2023 T.T. 1150.0 HRS.Nov 27, 2023 · Piper PA32R300 · Propeller Hub SectionSDR 2022FA0000290None · bypassingTHIS AIRCRAFT MADE AN EMERGENCY LANDING AT FORT LAUDERDALE EXECUTIVE AIRPORT AFTER SEVERAL ATTEMPTS THE RIGHT MAIN WOULD NOT FREEFALL, THE AIRCRAFT WAS BROUGHT TO US FOR MAINTENANCE AND TROUBLESHOOT AFTER THIS INCIDENT. WE FOUND THAT THE POWER PACK P/N HYC5005Jun 13, 2022 · N8415H · Piper PA32R301 · Fuselage Structure (General)
See all 42 difficulty reports
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duckdb -csv -c "SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
  FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
  WHERE engine_model_key = 'IO540K1G5D'
  ORDER BY difficulty_date DESC"

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STCs that may be installed · 43

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 43 STCs
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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 ('41598')
    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
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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-K1G5D'])) > 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.