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Interstate S-1A

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Aircraft model · Fixed wing single engine · Airplane · registry code 1850202

Manufacturer (registry)
INTERSTATE
Model
S-1A
Registry code
1850202
Registered
66 aircraft
Type
Fixed wing single engine
Engines
1 · Reciprocating
Seats
2
Weight class
Up to 12,499 lb
Cruise speed
77 mph
Certification
Type certificated
Data sheet
TCDSA-737
Holder
STOL Aviation LLC

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 · 155

1941Registered nowDeregistered2026

Airworthiness directives that may apply · 0

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

No ADs matched this model

Registered aircraft · 66

N28312Mattson Joshua C · Gardner, KSBuilt 1941 · S/N 4N28315Holcomb Garry M · Point, TXS/N 7N28318Robinson Stephen · Livermore, CABuilt 1941 · S/N 10
See all 66 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 aircraft_model_code IN ('1850202')
  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.

STCs approved for this model · 55

STC SA00079NYInstallation of Airwolf remote mounted engine oil filter kit AFC-K008 on single and multi engine fixed wing light aircraft incorporating Teledyne Continental reciprocating engines of 450 horsepower or less.Airwolf Filter CorporationSTC SA00081NYInstallation of Iceman Aviation Supplies, Inc. Carburetor Ice Detector.Alcor LLCSTC SA00344BO PAGE 2Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights.Whelen Aerospace Technologies
See all 55 STCs
Query with SQL
duckdb -csv -c "SELECT s.stc_number, s.description, s.holder, s.status, s.status_date
  FROM 'https://openairdocs.org/data/latest/faa_stc.parquet' s
  WHERE s.stc_number IN (SELECT stc_number FROM 'https://openairdocs.org/data/latest/faa_stc_model.parquet' WHERE model_key = 'S1A')
  ORDER BY s.status = 'Current' 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.

NTSB investigations · 22

Aircraft matched to this model through the registry, by N-number and event date.

Defining event, 2008 on

Of 3 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 7 cases with NTSB’s older coding, defined in its coding manual.

NTSB WPR26LA286Accident · No injuriesClass 4 · LimitedInvestigation openInterstate S-1A · Blackfoot, IDAug 1, 2026 · N37248 · Substantial damageNTSB WPR22LA003Accident · No injuriesClass 4 · LimitedFinal reportInterstate S-1A · Independence, ORThe separation of the left rudder pedal interconnect cable during takeoff, which resulted in the student pilot’s inability to maintain directional control.Oct 2, 2021 · N37317 · Substantial damageNTSB ERA10LA251Accident · Serious injuriesLimited investigationFinal reportInterstate S1A · Lakeland, FLThe pilot’s failure to maintain clearance from terrain for undetermined reasons.May 1, 2010 · N34926 · Substantial damage
See all 22 investigations
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 ('1850202')
  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 · 22

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

Incident 20250811016399IInterstate S-1A · Soldotna, AKOn 11 aug 2025 at 13:42 local, aircraft N37205 was landing on gravel rwy 07 at Soldotna Airport when it began to ground loop. The aircraft went airborne briefly, turning left, then stalling left wing down and heading back the opposite direction. It came down…Aug 11, 2025 · N37205 · Minor damageIncident 20180324010059IInterstate S-1A · Lancaster, CADuring the airshow performance, the pilot was attempting to perform a stunt that involved landing on a platform on top of a moving truck. During gusty wind conditions, the aircraft right wing tip contacted the side of the metal landing platform, damaging the…Mar 24, 2018 · N37428 · Minor damageIncident 20130630015399IInterstate S-1A · Nenana, AKPilot attempted to switch fuel tanks but fuel did not flow from the full tank.Jun 30, 2013 · N28319 · Minor damage
See all 22 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 aircraft_model_code IN ('1850202')
  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

No reports name this modelGeneral aviation reporting is voluntary.

The same model under other registry codes

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

Security National Acft S1-A0 registered aircraftRegistry code 0620303Callair S-1A0 registered aircraftRegistry code 1850210Pitts S-1A0 registered aircraftRegistry code 72201PHPitts Special S-1-A0 registered aircraftRegistry code 72202V7
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 = 'S1A' AND m.code NOT IN ('1850202')
  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.