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Lycoming 0-540 series

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Engine model · Reciprocating · 250 hp · registry code 41532

Manufacturer (registry)
LYCOMING
Model
0-540 SERIES
Registry code
41532
Installed in
5,228 registered aircraft
Type
Reciprocating
Power
250 hp
Data sheet
TCDSE-295
Holder
Lycoming Engines

The registry names only the engine series, so ADs for every model in the series are matched.

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Airworthiness directives that may apply · 39

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

1963In forceSuperseded2026
See all 47 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 ('41532'))
  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 · 9

Historical bulletins · 2
SAIB NE-08-26R1Dual MagnetosIssued Jul 8, 2008SAIB 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 ('41532'))
  GROUP BY s.saib_number ORDER BY issue_date DESC"

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Registered aircraft · 5,228

N1002HSmith Michael S · Anchorage, AKBuilt 1997 · S/N 23038CN1007UKallam Jerry · Palmer, AKBuilt 1998 · S/N 23047CN1008WRay Jonas · Palmer, AKS/N 23022C
See all 5,228 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 ('41532')
  ORDER BY n_number"

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NTSB investigations · 3,544

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 519 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 1,014 cases with NTSB’s older coding, defined in its coding manual.

NTSB CEN27LA019Accident · Minor injuriesClass 3 · LimitedInvestigation openPiper PA-28-235 · Cedar Rapids, IAOct 18, 2026 · N8759WNTSB WPR27LA003Accident · No injuriesClass 4 · LimitedInvestigation openMaule M-5-235C · Agua Dulce, CAOct 3, 2026 · N56328 · Substantial damageNTSB ANC26LA096Accident · Minor injuriesClass 3 · LimitedInvestigation openCessna R182 · Lebanon, TNSep 1, 2026 · N6346T
See all 3,544 investigations
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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 ('41532')
  ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"

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FAA incident reports · 4,539

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

Accident 20260901012009ACessna R182 · Lebanon, TNOn September 1, 2026, [privacy data omitted], a Cessna R182, [privacy data omitted], was involved in an accident near Lebanon, Tennessee, with one person on board. During the flight, the pilot reported a loss of engine power. The aircraft subsequently…Sep 1, 2026 · N6346T · DestroyedAccident 20260830012019ACessna R182 · Clarksville, TNPIC states aircraft main landing gear collapsed upon landing.Aug 30, 2026 · N756EB · Substantial damageIncident 20260829012049ICessna R182 · Nashville, TNAt approximately 1020 on 8/29/2026, at jwn, [privacy data omitted], Cessna 182, landed rwy 02, was taxiing back to the ramp when the aircraft’s left wing struck the hangar. This caused the aircraft to rotate and the propeller struck the hangar and encounter a…Aug 29, 2026 · N755MC · Minor damage
See all 4,539 incident reports
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 ('41532')
  ORDER BY event_date DESC, report_number DESC"

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Service difficulty reports · 107

SDR 2026FA0000347Thrust Button · faultyDURING MAJOR OVERHAUL INSTALLED SUPERIOR ROCKER SHAFT THRUST BUTTONS P/N SL12893.INFORMATION THAT WE RECEIVED STATED THAT FAULTY THRUST BUTTONS WILL FLOAT IN WATER AND GOOD PARTS WILL SINK. WE PERFORMED THIS TEST ON EVERY LOT NUMBER IN OUR INVENTORY AND FOUND May 9, 2026 · Reciprocating Engine Cylinder SectionSDR 2020FA0000280Gearbox · making metalDURING THE ANNUAL INSPECTION OF THE AIRCRAFT, IT HAS BEEN FOUND MAGNETIC PARTICLES ON THE MGB DETECTOR CHIP. THE QUANTITY OF MAGNETIC PARTICLES IS HIGH, BUT THE LIGHT OF THE DETECTOR WAS NOT ON, ALTHOUGH IT HAS BEEN CHECKED THAT IT WORKS. ACCORDING TO THE SIJun 4, 2020 · Robsin R44 · Main Rotor GearboxSDR 2019FA0000145Push-Pull Cable · defectiveAFTER ENGINE INSTALLATION THROTTLE SPRING BACK WAS EXCESSIVE WITH LOSS OF THROTTLE CONTROL. THROTTLE WOULD GLADLY GO TO IDLE AND STAY THERE EVEN WHEN FULLY ADVANCED. FACTORY AIRFRAME ATTACHMENT IS ON THE FLEXIBLE CABLE 2.5 INCHES AWAY FROM SOLID ATTACHMENT SECMay 8, 2019 · N272C · Mrchti SF260B · Power Lever
See all 107 difficulty reports
Query with SQL
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 = 'O540'
  ORDER BY difficulty_date DESC"

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STCs that may be installed · 59

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 SE04651CHTo allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22Swift Fuels LLC · Lists O-540-A1ASTC SE00825WIInstallation of Specialty Products Spin-on oil filter on Lycoming Engines.B & C Specialty Products Inc. · Lists O-540-A1ASTC SE2932SWInstall carburetor air temperature indicator. Approved for Aircooled Motors (Franklin Engine Co.) equipped with float carburetors. Model eligibility included here may not be inclusive.Alcor LLC
See all 59 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 ('41532')
    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.