- Manufacturer (registry)
- P&W CANADA
- Model
- PT6A-21
- Registry code
- 52172
- Installed in
- 77 registered aircraft
- Type
- Turbo-prop
- Power
- 550 hp
- Data sheet
- TCDSE4EA
- Holder
- Pratt & Whitney Canada Corp.
Model codes come from the FAA registry’s reference file.
On this page
Airworthiness directives that may apply · 5
ADs whose products match this engine model. Each AD’s applicability may narrow it by serial number, part number or configuration.
| 1980 | 1 |
|---|---|
| 1992 | 1 |
| 1997 | 1 |
| 2002 | 1 |
| 2014 | 1 |
Engine · Pratt & Whitney Canada PT6A-21
AD 2014-11-05Reinforcement liner to the power turbine (PT) containment ring and, for certain PT containment rings, adding scallopsAD 2002-23-13Turbine Exhaust DuctsAD 97-04-12Compressor Bleed-off ValveAD 92-15-11Compressor Delivery Air Line (P3) Filter AssemblyAD 80-08-12Fuel Pump Drive Coupling SplinesQuery 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 ('52172'))
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.
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 ('52172'))
ORDER BY coalesce(d.effective_date, d.publication_date, d.issue_date) DESC, d.ad_number DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
Information bulletins that may apply · 1
Engine · Pratt & Whitney Canada PT6A-21
SAIB NE-12-04Turbine/ Turboprop Engine: Reduction GearboxQuery 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 ('52172'))
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.
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 ('52172'))
GROUP BY s.saib_number ORDER BY issue_date DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
Registered aircraft · 77
N106DDHlp Aviation LLC · Shreveport, LAN11638N3701d LLC · Wilmington, NCN1212WTwo Drakes Air LLC · Lizella, GA
See all 77 registered aircraftQuery 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 ('52172')
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.
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 ('52172')
ORDER BY n_numberRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB investigations · 8
Aircraft matched to this engine model through the registry, by N-number and event date, checked against the reported serial number, make and model.
Of 5 cases NTSB coded with a defining event. All defining events
Findings NTSB made part of the probable cause. A case can have several. All findings
Of 2 cases with NTSB’s older coding, defined in its coding manual.
NTSB GAA21WA176Accident · 1 fatalClass 5 · ForeignBeech C90 · Durango, MexicoNTSB ERA17LA286Accident · Minor injuriesClass 3 · LimitedFinal reportAir Tractor AT 402A · Shaw, MSThe pilot’s decision to attempt takeoff at high gross weight, in high density altitude conditions, and with insufficient runway length. Contributing to the accident was the pilot’s inadequate preflight planning.NTSB ERA14LA312Accident · Minor injuriesLimited investigationFinal reportRaytheon C90A · Houston, MSThe pilot’s failure to maintain a stabilized approach and his subsequent failure to maintain airplane control during the landing flare, which resulted in touchdown off the side of the runway and collision with a ditch.NTSB CEN09FA087Accident · 1 fatalField investigationFinal reportBeech C90 · Rocksprings, TXThe pilot's failure to properly configure the pressurization controls, resulting in his impairment and subsequent incapacitation due to hypoxia.NTSB SEA08LA147Accident · No injuriesLimited investigationFinal reportAero Commander 690A · Tacoma, WAThe collapse of the right main landing gear for undetermined reasons.NTSB DEN08IA030Incident · No injuriesIncident investigationFinal reportBeech C90A · Emporia, KSThe improper installation of the right elevator trim tab attachment hardware by maintenance personnel which resulted in excessive wear, fatigue, and the failure of the push-pull tube.NTSB ATL07LA128Accident · Minor injuriesLimited investigationFinal reportBeech B90 · Chattanooga, TNThe pilot's inadequate preflight planning, which resulted in fuel exhaustion during the landing approach.NTSB SEA80DYP11Accident · No injuriesClosedBeech C90 · Ellensburg, WA
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 ('52172')
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.
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 ('52172')
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
FAA incident reports · 14
Matched to this engine model through the registry, by N-number and event date, checked against the reported make and model.
Incident 20250620009749IBeech C90A · Lexington, KYRepositioning flight operated under part 91 prior to 135 flight. During takeoff from Blue Grass Airport (klex), the pilot, reported that upon retracting the landing gear, the landing gear lever red unsafe light illuminated, accompanied by an aural gear…Incident 20201103015849IBeech C90 · Flagler, FLAfter the touchdown and rolling out on the runway the tower radioed to exit the runway to the left ? This occurred with the aircraft at around 30 KTS. During rollout the pilot stated he felt as though he had run over something small on the runway, possibly on…Incident 20200130001629IBeech C90A · Bay Minette, ALOn landing rollout at rural airfield, airplane struck deer. Damage was limited to one blade of right propeller.Incident 20181213023489IBeech C90 · Martin, SDOn 12/14/2018 at 1350 a king air C90 owned/registered to dale aviation, inc was involved in an incident during landing roll out while performing repositioning. Clear day conditions prevailed, and no flight plan was filed. The aircraft sustained minor damage,…Accident 20170821011599AAir Tractor AT-402A · Shaw, MSAround 6:30 pm, August 21, 2017 aircraft registration number N247LA crash on takeoff in Shaw, Mississippi. The pilot reported that as he was trying to take off with a full load from his home base he noticed that he was redline torque and RPM, and when he made…Incident 20170526021219IBeech C90A · Asheville, NC5-26-2017 N305JM , enroute from kbkv to kavl. #2 engine began to have power surges 20 minutes out from kavl. The pilot contacted kavl tower and performed an inflight shutdown of #2 engine and landed without incident .Accident 20140625012979ARaytheon C90A · Houston, MSAircraft was on short final and throttles brought to idle when wind shear caused the right wing to rise up violently. Pilot got aircraft under control with no time for go around. Aircraft was blown off the runway touchdown in grass beside runway and settled…Incident 20090817018659IHawker C90A · Alamosa, COUpon landing at als landing gear would not extend, pilot declared emergency, landing gear lowered manually. Aircraft landed without further incident. Maintenance found landing gear hydraulic power pack 60 amp circuit breaker open. Reset circuit breaker,…Accident 20081214854449ABeech C90A · Rocksprings, TXOn 12-14-2008 at approximately 1430 CST, a Beechcraft king air C-90A N43KM departed hondo airport hondo, Texas enroute to goodyear, Arizona following a maintenance visit at corrigan air center in hondo, Texas. At 1450 CST, N43KM requested and received IFR…Accident 20080530833919AGulstm 690A · Tacoma, WA(-23) Shortly after landing, when the brakes were applied to bring the aircraft to a stop, the aircraft swerved to the right and the right main gear collapsed. Examination of the landing gear found a failure of the fitting where the hydraulic actuator…Accident 20070919021599ABeech B90 · Chattanooga, TN(-23) On 09/19/2007, at 2015 hrs the pilot [privacy data omitted] operated aircraft N10TM, a Beechcraft B90 king air, with three passengers on board from birmingham, al en route to georgetown, KY. Pilot diverted to Chattanooga when he discovered the fuel…Incident 20011030030379IBeech C90A · Peoria, IL(-23) The aircraft was enroute from pierre, SD to indianapolis, in at 23000 ft when the cabin started to fill with smoke. The pilot declared an emergency 20 miles northeast of Peoria, IL at 302120Z. The aircraft diverted to the Greater Peoria Airport (kpia)…Incident 19900811041869IBeech C90 · Reno, NVPilot forgot to put the landing gear down and landed gear up.Accident 19800125001329ABeech C90 · Ellensburg, WALanded on closed, unplowed runway. Hit snow furrow at intersection. Runway condition not notamed.
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 ('52172')
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.
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 ('52172')
ORDER BY event_date DESC, report_number DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
Service difficulty reports · 310
SDR G1IA20260702112Fcu · faultedDURING CRUISE FLIGHT, LEFT ENGINE STARTED TO SURGE THEN LOST PARTIAL POWER. DECLARED EMERGENCY WITH ATC AND PROCEEDED DIRECT TO KPHX UTILIZING ASYMMETRIC THRUST. PERFORMED A NORMAL LANDING.SDR 2026F00118Compressor · faultedLOSS OF TORQUE AND RPM TO THE PROP, CURRENTLY UNSURE IF PGB CAUSED ENGINE FAILURE OR IF THE ENGINE FAILED. AFTER SPINNING THE COMPRESSOR BY HAND IT WAS NOTED THAT THERE WAS DRAG AND A RASPY SOUND COMING FROM THE COMPRESSOR. ENGINE WILL GO OUT FOR SHOP VISIT SDR YQSA20250205001Warning Message · activatedCRUISING AT FL230 WHEN ITT ON RIGHT SPIKED TO 900-1000 DEGREES C. TORQUE FELL SHORTLY AFTER DROPPING TO "0". RPM WAS 200RPM FROM PROP WINDMILLING. IDENTIFIED RIGHT ENGINE AS FAILED AND SECURED ENGINE PER THE MEMORY ITEMS FROM THE CHECKLIST. ANNOUNCED EMERGENC
See all 310 difficulty reportsQuery 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 = 'PT6A21' 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.
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 = 'PT6A21' ORDER BY difficulty_date DESC
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
STCs that may be installed · 18
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 SE000ENEngines will be maintained IAW 'Maintenance or Reliable Engines(MORE) Program,' Rev 4, dated 8/16/95.STC SE10947SCThe conversion of the Pratt & Whitney Canada, Model PT6A-21 to a PT6A-28 turboprop engineSTC SE02837NYThe conversion of the Pratt & Whitney Canada PT6A-21 engine to operate as a PT6A-28 engine to be done.
See all 18 STCsQuery 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 ('52172')
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.
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 ('52172')
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_numberRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
PMA parts · 462
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.
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 ('E4EA')
AND len(list_intersect(tcds_models, ['PT6A-21'])) > 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.
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 ('E4EA')
AND len(list_intersect(tcds_models, ['PT6A-21'])) > 0
ORDER BY supplement_date DESC, drs_guid DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.