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Pratt & Whitney PT6A-20A series

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Engine model · Turbo-prop · 550 hp · registry code 52139

Manufacturer (registry)
P & W
Model
PT6A-20A
Registry code
52139
Installed in
4 registered aircraft
Type
Turbo-prop
Power
550 hp

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 · 7

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

1975In forceSuperseded2026
Query with SQL
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 ('52139'))
  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 · 1

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 ('52139'))
  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 · 4

N1013NVal Air 2 LLC · White River, SDS/N 401-0722N136PAX-Press Charter Service Inc · Longview, TXBuilt 1975 · S/N LJ662N628AAEdge Air LLC · Wilmington, DEBuilt 2022 · S/N 4698222N8004Registration Pending · Kingsburg, CARegistration pendingBuilt 1983 · S/N H-4
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 ('52139')
  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 · 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 1 case 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 2 cases with NTSB’s older coding, defined in its coding manual.

NTSB CEN10CA262Accident · No injuriesData collectionFinal reportAir Tractor AT-301 · D'Hanis, TXThe pilot's failure to properly set the airplane's flaps prior to takeoff.May 20, 2010 · N3159D · Substantial damageNTSB CHI04CA162Accident · No injuriesData collectionFinal reportAir Tractor AT-401 · Britton, SDThe loss of engine power due to a stuck exhaust valve and the unsuitable terrain encountered during the forced landing. A factor to the accident was the soft terrain condition.Jun 23, 2004 · N1013N · Substantial damageNTSB MIA89LA127Accident · No injuriesLimited investigationFinal reportAir Tractor AT-301 · Fort Pierce, FLFailure of the number five cylinder. Factors related to the accident were: the proximity of homes in the area, which precluded jettisoning of the chemical load, and high vegetation in the emergency landing area.Apr 13, 1989 · N3159D · 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 ('52139')
  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 · 4

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

Accident 20100520035409AAir Tractor AT-301 · D'Hanis, TXPilot attempted to takeoff without flaps and ran off the end of the runway.May 20, 2010 · N3159D · Substantial damageIncident 20070712825409IAirtrc AT301 · Penfield, IL(-23) An ag-type aircraft had completed a pass and was maneuvering for another pass when the right wing suddenly dipped down in what the pilot considered wind turbulence off of some trees. The pilot reacted to the condition but did not have enough time to…Jul 12, 2007 · N3159D · Minor damageAccident 20040623012119AAirtrc AT401 · Britton, SD(-23) Pilot terry d. haven was spraying crops approximately seven miles NE of the Britton, SD airport (btn). He finished his last spray run and was heading back to the Britton airport when the engine started missing. The pilot tried to solve the problem but…Jun 23, 2004 · N1013N · Substantial damageAccident 19890413007879AAirtrc AT301 · Fort Pierce, FLEngine lost power on takeoff. Unable to dump load crashed in trees between houses. Nr 5 cylinder assembly had crackedApr 13, 1989 · N3159D · 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 ('52139')
  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 · 7

SDR 5BMA20120418001Turbine Blades · failedTHE PILOT REPORTED THE FOLLOWING, DURING CLIMB AFTER TAKEOFF FROM KOMA AT APPROXIMATELY 11,000 MSL THE RIGHT ENGINE ABRUPTLY LOST POWER. TORQUE WENT TO ZERO, ITT RAPIDLY DISMINISHED. COMPLETED EMERGENCY MEMORY ITEMS PER MANUFACTURE'S CHECKLIST. SHUTDOWN ANDApr 6, 2012 · N4950 · Beech C90 · Turbine SectionSDR 2009F00047Engine · overtempRT ENGINE HAD LOSS OF POWER AT CRUISE. ITT SPIKED AND STABILIZED AT 1100 C. ENGINE SHUTDOWN AND PROPELLER FEATHERED NORMALLY. NORMAL LANDING.Jun 23, 2009 · N4950C · Beech C90 · Engine (Turbine/Turboprop)SDR FSEA 09 0002Turbine · damagedAPPROX 45 MINUTES INTO FLIGHT AT FLT LEVEL 170 WHILE IN CRUISE FLIGHT CONDITIONS. RT ENGINE MADE AN UNUSUAL NOISE, FLAMES WERE SEEN FROM THE EXHAUST DUCTS. CREW INITIATED ENGINE SHUT DOWN PROCEDURES. CREW CONTACTED APPROACH CONTROL DECLARED AN EMERGENCY ANDApr 28, 2009 · N90ME · Beech C90 · Turbine SectionSDR 2009FA0000278Engine · fireAPPROX 30 MINUTES INTO FLIGHT, WHILE CRUISING AT 17,000 MSL, RT ENGINE MADE UNUSUAL NOISE, FLAMES WERE SEEN FROM EXHAUST DUCTS, ENGINE WAS SHUTDOWN. CREW DECLARED AN EMERGENCY AND MADE AN UNEVENTFUL LANDING. ASSISTANCE WAS REQUIRED DUE TO DIFFICULTY WHILE TAApr 2, 2009 · N90ME · Beech C90 · Engine (Turbine/Turboprop)SDR JDWA118SF1Propeller · power lossON CLIMB OUT, LEFT PROPELLER RPM DROPPED FROM 2200 TO 1900 RPM. PILOT TOOK NOTE AND CALLED IN FOR RETURN. MAINTENANCE HAS NOT DETERMINED THE CAUSE AT THIS POINT, TROUBLE SHOOTING IS CURRENTLY IN PROGRESS, SUSPECTING EITHER PROP GOV OR OVERSPEED GOV.Jan 26, 2009 · N118SF · Beech 99 · Propeller Controlling SystemSDR CA990301001Wheel · cracked(CAN) WHEEL FOUND CRACKED. CRACK 20 CM LONG HAD OPENED ABOUT 6 MM. THE CRACK HAD PASSED THROUGH TWO FINS AND WAS PROGRESSING TOWARDS THE OUTSIDE OF THE RIM. TIRE DID NOT DEFLATE. NO MECHANICAL DAMAGE IN AREA OF CRACK.Feb 8, 1999 · Dhav DHC6100 · Wheel/Ski/FloatSDR CA970430003Wheel Half · cracked(CAN) HALF OF THE WHEEL ASSY OF THE LEFT HAND MAIN LANDING GEAR WHEEL BROKE DURING TAKEOFF. A TUBE IN THE TUBELESS TIRE PREVENTED AIR FROM ESCAPING THROUGH THE CRACK THAT HAD DEVELOPED. AIRCRAFT WAS IMPORTED AND THE SUBMITTER SPECULATES THE PREVIOUS OWNER CApr 10, 1997 · Beech C90 · Wheel/Ski/Float
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 = 'PT6A20A'
  ORDER BY difficulty_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.

STCs that may be installed · 9

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 SE00003ENInstructions for Continued Airworthiness for the PT6A-6/C20, -20, -20A and, -20B engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals.MORE Company IncSTC SE00014ENInstallation of the Pratt & Whitney Engine Services, Inc. CrossCheck Engine Monitor Kit P/N HUMS-K-071-1, Rev. A on the specified PT6A engine models and kit P/N HUMS-K-071-2 on the specified A250 engine models.Pratt & Whitney Engine Services Inc.STC SE00020ENInstallation of the Pratt & Whitney Engine Services, Inc. TrendCheck/ TrendCheck Plus Engine Monitor Kit P/N TREND-K-010-1Pratt & Whitney Engine Services Inc.STC SE615GLIncorporation of a fuel flow transducer.Shadin AvionicsSTC SE09257SCConvert P&W Engine Models PT6A-15AG, -27, and -28, into PT6A-34 configuration.Covington Aircraft Engines, Inc.STC SE659NEInstallation of oil tank filler neck check valve, P/N TSA-76A.Aviation Components SupportSTC SE1269EAStripping and recoating of compressor turbine blades, P/N 3023401, with Walbar Metals, Inc.Airwork CorporationSTC SE1165EAAssembly and installation of AW10262 wet spline starter gear seal.Airwork CorporationSTC SE4607SWRevise the starter-generator drive spline to provide lubrication with engine oil.Aviall of Texas, Inc
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 ('52139')
    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 · 586

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.

3005293CPInsert, Fuel Control Drive ShaftCore Parts LLC · PMA PQ05326NM · Replaces 3005293 · Aug 17, 20263005293CPInsert, Fuel Control Drive ShaftCore Parts LLC · PMA PQ05326NM · Replaces 3005293 · Aug 17, 20263019136CPRing, PlasticCore Parts LLC · PMA PQ05326NM · Replaces 3019136 · Jul 10, 2026
See all 586 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 ('E2NE', 'E4EA')
    AND len(list_intersect(tcds_models, ['PT6A-20A'])) > 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.