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Lycoming O-360-A1D

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Engine model · Reciprocating · 180 hp · registry code 42250

Manufacturer (registry)
LYCOMING
Model
O-360-A1D
Registry code
42250
Installed in
89 registered aircraft
Type
Reciprocating
Power
180 hp
Data sheet
TCDSE-286
Holder
Lycoming Engines

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

On this page

Airworthiness directives that may apply · 30

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 34 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 ('42250'))
  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 · 5

Historical bulletins · 1
SAIB 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 ('42250'))
  GROUP BY s.saib_number ORDER BY issue_date DESC"

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Registered aircraft · 89

N1125Hilling William C · Huntingdon, PABuilt 2010 · S/N 25616N1128Nevels Donald L · Everton, MOBuilt 1966 · S/N 001N116DWWalters Douglas B · Templeton, CABuilt 2020 · S/N 21807
See all 89 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 ('42250')
  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 · 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 6 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 GAA25WA222Accident · 2 fatalClass 5 · ForeignLional Ray Ward Ward F-4 Rocket · Mallorca, SpainAug 2, 2025 · N31VX · Substantial damageNTSB ERA20FA063Accident · 2 fatalClass 3 · FieldFinal reportVans Vans RV-6 · Cullman, ALThe pilot’s inadequate planning, which resulted in fuel exhaustion and a total loss of engine power during the initial climb. Also causal was the pilot’s exceedance of the airplane’s critical angle of attack while attempting to return to the runway after…Jan 5, 2020 · N420PW · DestroyedNTSB GAA17CA094Accident · No injuriesData collectionFinal reportSchauer William A JR Starduster TOO SA300 · Kapolei, HIThe pilot's failure to maintain directional control during the landing roll.Dec 8, 2016 · N2822T · Substantial damageNTSB GAA17CA059Accident · Minor injuriesData collectionFinal reportHaring Clay RV6 · Eureka, KSThe pilot’s failure to maintain directional control during the landing roll, which resulted in a runway excursion.Nov 4, 2016 · N207HW · Substantial damageNTSB CEN16LA316Accident · No injuriesLimited investigationFinal reportSchabacker Konrad J Acro Sport II · Winterset, IAThe pilot’s failure to maintain directional control of the airplane during the landing roll, which resulted in an on-ground collision with two parked airplanes.Aug 9, 2016 · N6214C · Substantial damageNTSB CEN15CA086Accident · No injuriesData collectionFinal reportWilliams Glenn RV 8A · San Antonio, TXUnintentional collision with a deer at night.Nov 10, 2014 · N81GW · Substantial damageNTSB DFW06CA105Accident · No injuriesData collectionFinal reportParks RV-7 · Fort Worth, TXThe pilot's failure to maintain directional control during the takeoff roll. A contributing factor was the prevailing crosswind.Apr 16, 2006 · N620CF · Substantial damageNTSB MIA75FKT60Accident · No injuriesClosedMooney M20C · Pompano Beach, FLFeb 3, 1975 · N6577U · Substantial damageNTSB MKC69D0232Accident · No injuriesClosedPitts SC-1 · Waldron, MOAug 31, 1968 · N1128 · Substantial damageNTSB FTW67D0255Accident · No injuriesClosedMooney M21 · Winnfield, LASep 22, 1966 · N6872U · 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 ('42250')
  ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"

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FAA incident reports · 19

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

Incident 20200704005229ITriplett Robert Bearhawk · North Canton, OHPilot was landing on runway 5 with a slight crosswind. Lost control upon touchdown and ground looped aircraft. Aircraft went off side of runway into grass. Right main landing gear collapsed, tail gear bent, right wing tip damged and composite propeller blade…Jul 4, 2020 · N94RT · Minor damageAccident 20200105003239ATyler W Walker/Joseph P Macken Vans RV-6 · Vinemont, ALN420PW, an experimental vans RV-6 departed Cullman airport (cmd) at 12:42 local time. As the aircraft climbed thru approximately 300 feet, witnesses reported hearing a loud noise. Then observed the aircraft begin a sharp 180 degree turn as it descended…Jan 5, 2020 · N420PW · Destroyed · 2 fatalIncident 20190112007569IMooney M20C · Texarkana, AROn January 12, 2019 at approximately 1224 CST, N6872U a Mooney M20C airplane, registered to [privacy data omitted] and operated by an airline transport pilot, departed tyler, TX (tyr) to Texarkana, AR (txk) on a VFR flight with ATC flight following,…Jan 12, 2019 · N6872U · Minor damage
See all 19 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 ('42250')
  ORDER BY event_date DESC, report_number DESC"

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Service difficulty reports · 82

SDR 2024FA0000748Exhaust Duct · leakingTHE POWER FLOW EXHAUST INSTALLED ON THIS AC WAS FOUND TO HAVE EXTEME LEAKAGE INTO CABIN. THIS WAS A REBUILT EXHAUST LHE OWNER HAD LNSTALLED ON 10/22/22 AFTER THE THE FIRST POWERFLOW EXHAUST WAS FOUND LEAKING. THIS IS THO SEVENTH POWERFLOW EXHAUST SYSTEM THAT Oct 3, 2024 · N78875 · Mooney M20C · Engine Collector/Tailpipe/NozzleSDR 2024FA0000734Muffler · failedAFTER 3.5 HRS POST EXHAUST SYSTEM OVERHAUL, THE MUFFLER HAD A CATASTROPHIC FAILURE WHERE SECTION OF MUFFLER DEPARTED ASSEMBLY DUE TO INNER BAFFLING FAILED DUE TO MISSING WELD. AIRCRAFT WIRING WAS BURNED ON LT SIDE OF ENGINE (STARTER WIRE) CARBURETOR BOX WAS Aug 11, 2024 · N1925Y · Mooney M20D · Engine Noise SuppressorSDR 2023F00011Accumulator · abnormalRTO + GTB: ABANDONED TAKE OFF (50KTS) HYD BLUE SYS LO PRESS. IN ACCORDANCE WITH AMM 29-12-42-000-001-A/400-001-A THE BLUE POWER ACCUMULATOR FIN 2070GM WAS REMOVED AND REPLACED. AND OPERATIONAL TEST AND BLEED SYS. OK.Dec 29, 2022 · N724 · Aviat A1B · Hydraulic System, Main
See all 82 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 = 'O360A1D'
  ORDER BY difficulty_date DESC"

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STCs that may be installed · 36

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 LLCSTC SE00825WIInstallation of Specialty Products Spin-on oil filter on Lycoming Engines.B & C Specialty Products Inc.STC SE208SOInstallation of ice indicator in the carburetor.LegacySTC.com · Lists O-360 Series
See all 36 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 ('42250')
    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.