Aircraft model · Fixed wing multi engine · Airplane · registry code 8780620

Manufacturer (registry)
SWEARINGEN
Model
SA227-TT
Registry code
8780620
Registered
11 aircraft
Type
Fixed wing multi engine
Engines
2 · Turbo-prop
Seats
12
Weight class
12,500 to 19,999 lb
Certification
Type certificated
Data sheet
TCDSA5SW
Holder
Ontic Engineering and Manufacturing Inc.

Model codes come from the FAA registry’s reference file. ADs are matched to them by model name and maker.

On this page

Aircraft by year built · 23

1981Registered nowDeregistered2026
Aircraft by the year they were built: 23 aircraft
198116
19824
19832
19851

Airworthiness directives that may apply · 44

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

1982In forceSuperseded2026
ADs by the year they took effect: 55 ADs
19821
19831
19841
19862
19871
19903
19911
19923
19933
19941
19968
19975
19981
19991
20005
20011
20023
20031
20053
20071
20111
20121
20142
20151
20162
20172
See all 55 ADs
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_aircraft_model_directive.parquet' WHERE aircraft_model_code IN ('8780620'))
  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 · 14

Historical bulletins · 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_aircraft_model_saib.parquet' WHERE aircraft_model_code IN ('8780620'))
  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 · 11

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 aircraft_model_code IN ('8780620')
  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 · 6

Aircraft matched to this model through the registry, by N-number and event date, checked against the reported serial number, make and model.

NTSB CEN18LA086Accident · No injuriesLimited investigationFinal reportSwearingen SA227 TT · Houston, TXThe failure of the left starter relay during engine start, which resulted in a loss of electrical and battery power during the flight and led to a forced landing with the nose landing gear not fully extended, causing substantial damage to the engines.Jan 19, 2018 · N6UP · Substantial damageNTSB GAA17CA333Accident · No injuriesData collectionFinal reportSwearingen SA227 TT · Santa Monica, CAThe pilot’s unstabilized approach after encountering wake turbulence, which resulted in a hard landing.Mar 12, 2017 · N53DA · Substantial damageNTSB ATL93MA068Accident · 4 fatalMajor investigationFinal reportFairchild SA227-TT · Blountville, TNFailure of the pilot to follow procedures concerning use of the engine inlet anti-ice system and/or continuous ignition while operating in icing conditions, which resulted in probable ice ingestion and loss of engine power; and the pilot's failure to maintain…Apr 2, 1993 · N500AK · DestroyedNTSB NYC85LA256Accident · No injuriesLimited investigationFinal reportSwearingen 226T · Hamilton, NYThe aircraft was on approach for landing at Hamilton, new york when the cross power levers were pulled back to flight idle. The left prop went into beta mode stalling the left wing at about 8 feet above the runway. The aircraft rolled about 20 degrees to the…Aug 30, 1985 · N92RC · Substantial damageNTSB CHI84IA252Incident · No injuriesIncident investigationFinal reportFairchild SA-227-TT · Pontiac, MIThe aircrew noticed a 'nose up' pitch change during descent at about the time they were leveling to slow for the arpt pattern & traffic. The plt reported that full forward yoke pressure was required to stop the nose up condition. The acft was landed without…Jun 13, 1984 · N2GL · No damageNTSB NYC84LA079Accident · No injuriesLimited investigationFinal reportSwearingen SA-226T · Philadelphia, PAThe plt broke out of the overcast at 1000 ft lowered flaps and landed the acft with the gear retracted. The plt said he had lowered the gear. The gear warning horn reportedly did not sound.Jan 29, 1984 · N99JW · 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.aircraft_model_code IN ('8780620')
  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 · 14

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

Incident 20210820014449ISwearingen SA227-TT · Shreveport, LAThe PIC stated that following an uneventful flight he landed on rwy 14 with normal touchdown and rollout to about 3000 ft down the runway. When nose gear steering switch was engaged to taxi the aircraft made an aggressive left turn from centerline and PIC was…Aug 20, 2021 · N31JV · Minor damageAccident 20180119009679ASwearingen SA227-TT · Houston, TXWhile aircraft was passing through 18,000 feet, both generators failed and would not reset. Battery power rapidly deteriorated and the crew declared an emergency and diverted to kefd. During the descent total electrical failure occurred. After the aircraft…Jan 19, 2018 · N6UP · Substantial damageAccident 20170312007549ASwearingen SA227-TT · Santa Monica, CAThis merlin iiic departed palm springs international (kpsp) at approximately 11:50 a.m. (12MAR2017) on an IFR flight plan arriving at smo approximately 25 minutes later. PIC indicates encountering "wake turbulence" at ldg site, resulting in "hard landing"…Mar 12, 2017 · N53DA · Substantial damageIncident 20161017016769ISwearingen SA227-TT · Hayward, CAPIC operating a Swearingen merlin SA227-TT aborted take-off on rwy 28L at hwd airport. While in take-off roll, left brake locked causing aircraft to veer left off rwy and onto grass median just short of taxiway delta. No damage to aircraft, 2 POB, no injuries.Oct 17, 2016 · N53DA · No damageIncident 20020424006449ISwrngn SA227TT · Indianapolis, IN(-23) Enroute at cruise altitude, the #1 engine fuel bypass light illuminated. The pilot declared an emergency and elected to land at the nearest airport. He stated there was a lot of lightning in the area, and thought he may have taken a strike. Upon arrival…Apr 24, 2002 · N213PAAccident 19930401007499ASwrngn SA227TT · Bristol-Johnson, TNApproach in icing conditions. Lost control. Spiral dive to impact. Indicates engine icing flameouts. Airframe ice.Apr 1, 1993 · N500AK · Destroyed · 5 fatalIncident 19910426029209ISwrngn SA227TT · Teterboro, NJAircraft veered off runway on takeoff roll due to faulty brakes. Replaced brakes and anti skid valves.Apr 26, 1991 · N2GLIncident 19900817055969ISwrngn SA227TT · Nantucket, MAPilot aborted takeoff due to brake dragging, veered and hit runway light. Suspect parking brake not fully off.Aug 17, 1990 · N92RC · Minor damageIncident 19900727040489ISwrngn SA227TT · Binghamton, NYLightning strike en route. Returned to departure point. Left propeller replaced due to lightning strike damage.Jul 27, 1990 · N92RC · Minor damageIncident 19860624034079ISwrngn SA227TT · Farmingdale, NYDuring descent, right engine EGT was excessive. Engine was shutdown. Malfunction to be reported.Jun 24, 1986 · N53DAAccident 19850830043339ASwrngn SA227TT · Hamilton, NYPower lever guard worn. Allowed left lever, hence propeller into beta. Left wing stalled, hit hard on left main.Aug 30, 1985 · N92RC · Substantial damageIncident 19850107001709ISwrngn SA227TT · Buffalo, NYLeft followed by right engines lost power. Restart on left engine, right shutdown. Safe landing made.Jan 7, 1985 · N53DAIncident 19840613045839ISwrngn SA227TT · Pontiac, MIPitch up occurred at level out to slow for traffic pattern. Horizontal stabilizer trim actuator removed and replacedJun 13, 1984 · N2GLAccident 19840129042129ASwrngn SA226T · Philadelphia, PAGear up landing was made causing substantial damage to aircraft.Jan 29, 1984 · N99JW · 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 aircraft_model_code IN ('8780620')
  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 · 11

SDR 2013FA0000704Static Inverter · damagedDURING APPROACH, A PASSENGER NOTICED SPARKS COMING FROM THE AREA OF THE AFT MOUNTED CABIN AC INVERTER. ACCORDING TO PASSENGERS AND CREW, THERE WAS NOTHING PLUGGED IN OR THE 110 VOLT AC OUTLET ON THE INVERTER FRONT PANEL. AFTER AN UNEVENTFUL LANDING, MECHANICNov 17, 2013 · N6UP · Swrngn SA227TT · AC Generation SystemSDR 99ZZZX3386Nut · crackedREAR TURBINE NUT PN 865082-1 WAS REMOVED AND FOUND TO HAVE GALLED THREADS AND CRACKS IN THE THREADS. THIS ENGINE HAS 596.0 HOURS SINCE OVERHAUL. TURBINE NUT APPEARS TO HAVE BEEN RE-USED. SUBMITTER STATED THESE NUTS SHOULD BE A ONE-TIME USE ONLY.Aug 17, 1999 · N227TT · Swrngn SA227TT · Turbine SectionSDR 99ZZZX1128Engine · seizedA FUNCTIONAL CHECK FLIGHT WAS CONDUCTED WHICH CONSISTED OF 0.5 HOURS AND 1 CYCLE. THE NORMAL COOL DOWN PERIOD WAS ACCOMPLISHED, AFTER AN UNEVENTFUL FLIGHT AND SHUT DOWN WERE COMPLETED. THE NEXT MORNING, A PRE-FLIGHT WAS CONDUCTED AND FOUND THE RT PROPELLER WMar 2, 1999 · N227TT · Swrngn SA227TT · Engine (Turbine/Turboprop)SDR 97ZZZX2372Master Cylinder · leakingDURING A ROUTINE AND B LETTER CHECK, FOUND BOTH PILOTS' LEFT AND RIGHT MASTER CYLINDERS LEAKING. BOTH CYLINDERS WERE REPLACED.May 1, 1997 · N99JW · Swrngn SA227TT · Master Cylinder/Brake ValveSDR 97ZZZX2371Fairing · chafedBOTH LEFT AND RIGHT ENGINE EXHAUST PIPE FAIRINGS WERE FOUND CHAFED COMPLETELY THROUGH THE LOWER PORTION OF THE SEAL AND INNER FLANGE OF THE FAIRINGS. THIS WAS DISCOVERED DURING THE NORMAL A AND B LETTER CHECK INSPECTION.May 1, 1997 · N99JW · Swrngn SA227TT · Nacelle/Pylon, Plate/SkinSDR 97ZZZX2370Fairing · chafedBOTH LEFT AND RIGHT ENGINE EXHAUST PIPE FAIRINGS WERE FOUND CHAFED COMPLETELY THROUGH THE LOWER PORTION OF THE SEAL AND INNER FLANGE OF THE FAIRINGS. THIS WAS DISCOVERED DURING THE NORMAL A AND B LETTER CHECK INSPECTION.May 1, 1997 · N99JW · Swrngn SA227TT · Nacelle/Pylon, Plate/SkinSDR 97ZZZX2369Switch · miswiredDURING THE PROCESS OF TROUBLESHOOTING A YAW DAMPENER PROBLEM, DISCOVERED THE POSITION OF THE SWITCH (RIGHT OR LEFT),INDICATING FROM WHICH BUS IT RECEIVED POWER, WAS REVERSED. CORRECTED THIS CONDITION AND ASSUMED THE AIRCAFT HAS BEEN WIRED THIS WAY SINCE IT WAMay 1, 1997 · N99JW · Swrngn SA227TT · Autopilot SystemSDR 97ZZZX2364Skin · chafedDURING AN ENGINE EXHAUST PIPE FAIRING CHANGE, DISCOVERED A STEEL BRAIDED FUEL VENT LINE HAD CHAFED INTO THE TOP SKIN OF THE LEFT WING NEAR THE EXHAUST PIPE. THE CHAFED AREA WAS 1.25 INCHES LONG, .4375 INCH WIDE BY .017 INCH DEEP. FAIRCHILD ENGINEERING DETERMMay 1, 1997 · N99JW · Swrngn SA227TT · Wing, Plate/SkinSDR 97ZZZX533Battery · leakingDURING AN INSPECTION, THE ELT BATTERY WAS DUE FOR REPLACEMENT. FOUND BATTERY LEAKING WHEN REMOVED. NO DAMAGE WAS FOUND TO ELT UNIT. OPS CHECKS SATISFACTORY WITH NEW BATTERY INSTALLED. APPEARED TO LEAK AROUND CORNER OF CASE THAT WAS SEALED AT MANUFACTURER.Jan 10, 1997 · N99JW · Swrngn SA227TT · Emergency Locator BeaconSDR 96ZZZX3726Bolt · improperSECOND OCCURRENCE ON THIS TYPE AIRCRAFT WITH HEAVY TRUSS. SIDE MOUNT ISOLATOR THROUGH-BOLT DOES NOT ENGAGE LOCKING DEVICE IN ENGINE MOUNT TRUSS. VENDOR (LORD) CALLS FOR NRS627-H46 AND LM427-10 WASHER. FAIRCHILD CALLS FOR NAS627-50 WITH MS20002C7 WASHER. USJun 21, 1996 · Swrngn SA227TT · Engine Mount SectionSDR 96ZZZX3512Bolt · wrong partDURING SCHEDULED INSPECTION, FOUND ENGINE SIDE MOUNT ISOLATOR THROUGH-BOLTS NOT PROPERLY ENGAGING LOCKING DEVICE IN TRUSS. VENDOR (LORD) SPECIFIES NAS627-H46 BOLT WITH .090 INCH BY 1.5 INCH WASHER, FAIRCHILD SPECIFIED NAS627-50 BOLT WITH APPROXIMATELY .075 INJun 14, 1996 · N900AK · Swrngn SA227TT · Engine Mount Section
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 aircraft_model_key = 'SA227TT'
  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 · 94

Approved for this 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.

See all 94 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_aircraft_model_stc.parquet'
    WHERE aircraft_model_code IN ('8780620')
    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.

The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

Query with SQL
duckdb -csv -c "SELECT m.code, m.manufacturer, m.model, count(g.n_number) AS aircraft
  FROM 'https://openairdocs.org/data/latest/faa_aircraft_model.parquet' m LEFT JOIN 'https://openairdocs.org/data/latest/faa_aircraft_registration.parquet' g ON g.aircraft_model_code = m.code
  WHERE m.match_key = 'SA227TT' AND m.code NOT IN ('8780620')
  GROUP BY ALL
  ORDER BY aircraft DESC
  LIMIT 12"

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.