# Interstate S-1B2 - Type: Aircraft model (FAA registry) - Registry codes: 1850303, 05621OQ - Manufacturer (registry): INTERSTATE · INTERSTATE AIRCRAFT CO INC - Model: S-1B2 - Aircraft type: Fixed wing single engine - Category: Airplane - Engines: 1 · Reciprocating - Seats: 2 - Weight class: Up to 12,499 lb - Cruise speed: 87 mph - Certification: Type certificated - Data sheet: [TCDS A-754](https://openairdocs.org/tcds/A-754) (OpenAirDocs) - Holder: STOL Aviation LLC - Registered aircraft: 4 - Page: https://openairdocs.org/model/interstate-s-1b2 Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker. The FAA lists this model under more than one registry code, usually for different spellings of the maker. This page covers them all. ## ADs that may apply (OpenAirDocs) Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [AD 86-20-04](https://openairdocs.org/ad/86-20-04): Placard-Airspeed Indicator · STOL S-1B2. Effective Oct 12, 1986 ## Registered aircraft (4) - [N50AA](https://openairdocs.org/aircraft/N50AA): [Ogonowski Kristine Staffeldt](https://openairdocs.org/faa-owner/OGONOWSKI%20KRISTINE%20STAFFELDT), [Wasilla, AK](https://openairdocs.org/faa-place/AK/Wasilla), built 1974, S/N 1001 - [N51AA](https://openairdocs.org/aircraft/N51AA): [Noble Caleb E D](https://openairdocs.org/faa-owner/NOBLE%20CALEB%20E%20D), [Glennallen, AK](https://openairdocs.org/faa-place/AK/Glennallen), built 1976, S/N 1002 - [N52AT](https://openairdocs.org/aircraft/N52AT): [Powell Michael R](https://openairdocs.org/faa-owner/POWELL%20MICHAEL%20R), [Anchorage, AK](https://openairdocs.org/faa-place/AK/Anchorage), built 1977, S/N 1003 - [N801AT](https://openairdocs.org/aircraft/N801AT): [Arctic Tern Aviation LLC](https://openairdocs.org/faa-owner/ARCTIC%20TERN%20AVIATION%20LLC), [Dallas, TX](https://openairdocs.org/faa-place/TX/Dallas), built 2006, S/N 2001 ## STCs approved for it (58, first 50) - [STC SA00081NY](https://openairdocs.org/stc/SA00081NY): Installation of Iceman Aviation Supplies, Inc. Carburetor Ice Detector.. Alcor LLC - [STC SA00344BO PAGE 2](https://openairdocs.org/stc/SA00344BO%20PAGE%202): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights.. Whelen Aerospace Technologies - [STC SA00410BO](https://openairdocs.org/stc/SA00410BO): Installation of an AV-30-C Multi-Mode Indicator. uAvionix Corporation - [STC SA00478CH](https://openairdocs.org/stc/SA00478CH): Installation of Cooper Superflite 102 Fabric.. Aviation Products Systems Inc. - [STC SA00780SE](https://openairdocs.org/stc/SA00780SE): Installation of the True Lock Safety Retention Axle Lock Nut System. True Lock LLC - [STC SA01015SE](https://openairdocs.org/stc/SA01015SE): Installation of eligible Alaska Bushwheel, Inc. wheels and TSO-C62d tires. ABI LLC - [STC SA01233SE](https://openairdocs.org/stc/SA01233SE): Fabrication and installation of Alaskan Bushwheel LLC tail wheel and fork assembly. ABI, LLC - [STC SA01240SE](https://openairdocs.org/stc/SA01240SE): Installation of secondary voltage indication system. Visual Instruments LLC - [STC SA01757WI](https://openairdocs.org/stc/SA01757WI): To allow the use of UL91 or UL94 (minimum) grade aviation fuel. Swift Fuels LLC - [STC SA01765SE](https://openairdocs.org/stc/SA01765SE): Installation of Alaskan Bushwheel TSO-C26d wheels, Part Number (P/N) ABI-1010. ABI, LLC - [STC SA01831WI](https://openairdocs.org/stc/SA01831WI): To allow the use of UL91 (minimum) grade aviation fuel. Petersen Aviation Inc - [STC SA01944CH (1 OF 2)](https://openairdocs.org/stc/SA01944CH%20(1%20OF%202)): Modify airplane to fly on unleaded automotive gasoline, 87 minimum antiknock index, per ASTM Specification D-439 or D-4818 of any volatility class, A through E, or 82UL AVGAS per ASTM D-6227.. Experimental Aircraft Association Inc. - [STC SA01967WI (2 OF3)](https://openairdocs.org/stc/SA01967WI%20(2%20OF3)): Use of GAMI G100UL High Octane Unleaded Avgas. General Aviation Modifications Inc. - [STC SA01988SE](https://openairdocs.org/stc/SA01988SE): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) MVP-50P.. Electronics International Inc. - [STC SA02212AK](https://openairdocs.org/stc/SA02212AK): Replacement of existing landing and/or taxi light reflector and bulbs with high intensity discharge (HID) lighting systems. Seaplanes North LLC - [STC SA02283SE PAGE 1](https://openairdocs.org/stc/SA02283SE%20PAGE%201): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P. Electronics International Inc. - [STC SA02402SE PAGE 1](https://openairdocs.org/stc/SA02402SE%20PAGE%201): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) CGR-30C. Electronics International Inc. - [STC SA02428AK](https://openairdocs.org/stc/SA02428AK): Installation of a hydraulically actuated ski drag assembly. Northern Airframes LLC - [STC SA02428SE](https://openairdocs.org/stc/SA02428SE): Installation of an Air Stream Switch for an electric time recording device on non-pressurized aircraft. Henry F Rogers/David E Polley - [STC SA02553AK](https://openairdocs.org/stc/SA02553AK): Fabrication and installation of a Tail Wheel Anti-Shimmy Dampener. Keller Engineering Group LLC - [STC SA04568CH](https://openairdocs.org/stc/SA04568CH): Installation of the uAvionix tailBeaconX, a tail mounted position light with integrated Automatic Dependent Surveillance - Broadcast (ADS-B) Out and 1090MHz Mode-S transponder functionality. uAvionix Corporation - [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC - [STC SA04776NY (1 OF 2)](https://openairdocs.org/stc/SA04776NY%20(1%20OF%202)): The HIPEC Covering and Finishing System must be performed and maintained. HIPEC Aircraft Coatings Inc. - [STC SA04837NY](https://openairdocs.org/stc/SA04837NY): Installation of AeroLED's Holdings, LLC., position lights, navigation lights, strobe lights and beacon lights. AeroLED's Holdings, LLC - [STC SA1051GL](https://openairdocs.org/stc/SA1051GL): Install Cooper Superflite. Cooper Aviation Supply Company, Inc. - [STC SA1626NM PAGE 1](https://openairdocs.org/stc/SA1626NM%20PAGE%201): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International - [STC SA1914NM](https://openairdocs.org/stc/SA1914NM): Installation of Schneider wheel skis, 6-inch x 10-inch aluminum wheel adapters and 29x11.0-10 8-ply minimum tires.. Schneider Richard J - [STC SA2190NM PAGE 1](https://openairdocs.org/stc/SA2190NM%20PAGE%201): Installation of electronics International Digital Volt/Amp Gauges and Accessories.. Electronics International - [STC SA21NW](https://openairdocs.org/stc/SA21NW): Installation of a 70 pound baggage compartment in either or both EDO 89-2000, 89A-2000 or 689-2130 floats. Kenmore Air Harbor Inc - [STC SA2343NM](https://openairdocs.org/stc/SA2343NM): Installation of SWS-11000 Tundra tires, wheels, hubs.. Schneider Richard J - [STC SA2350NM PAGE 1](https://openairdocs.org/stc/SA2350NM%20PAGE%201): Installation of Electronics International Inc digital carburetor/outside air temperature gauges. Electronics International - [STC SA2683NM](https://openairdocs.org/stc/SA2683NM): Installation of Precise Flight, Inc. stand-by vacuum system (SVS). Precise Flight Inc - [STC SA2687NM](https://openairdocs.org/stc/SA2687NM): Installation of Truboplus/ Electronics Int'l gauges and switches.. Aero Manufacturing Inc. - [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories.. Electronics International Inc. - [STC SA320AL](https://openairdocs.org/stc/SA320AL): ONE ONLY STC, S/N 195 AND S/N 231: Installation of Lycoming O-320-A2B engine, McCauley 1A175/GM82 propeller, Cleveland 20-6, 6.00 - 6 main wheel and brake assemblies with 8.50 - 6, 6-ply tires, leaf tail spring with Scott Model 3200 tail wheel assembly, squared wing tips, and miscellaneous other design changes to airplanes S/N 195 and S/N 231. STOL Aviation LLC c/o Tom Csatari - [STC SA356CH](https://openairdocs.org/stc/SA356CH): Installation of seaplane safety covers.. Nicolet Plastics, Inc - [STC SA3862NM PAGE 1](https://openairdocs.org/stc/SA3862NM%20PAGE%201): Installation of Electronics International Primary TIT/EGT/CHT instruments, remote switches and associated accessories.. Electronics International - [STC SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc - [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer.. Electronics International - [STC SA4305WE](https://openairdocs.org/stc/SA4305WE): Installation of GAR-AERO wheel adapters and tundra type tires on the main landing gear. Seaplanes North LLC - [STC SA4624NM](https://openairdocs.org/stc/SA4624NM): Installation of F. Atlee Dodge springs 2097 and 2127 to replace bungee cords on ski equipped airplanes.. F Atlee Dodge Aircraft Service - [STC SA4724NM](https://openairdocs.org/stc/SA4724NM): Installation of Cleveland brakes.. Machen Inc - [STC SA489EA](https://openairdocs.org/stc/SA489EA): Installation of ARP Inc. carburetor ice detection system. Aircraft & Rotorcraft Products (ARP) Inc - [STC SA5159NM (1 OF 2)](https://openairdocs.org/stc/SA5159NM%20(1%20OF%202)): Installation of chip detector system.. Northwest Aircraft Inc - [STC SA563CH](https://openairdocs.org/stc/SA563CH): Authorizes installation of engines equipped w/Unison Limited Authority Spark Advance Regulator (LASAR) ignition system w/Cylinder Head Temp. (CHT) monitoring capability on airframes. engines.. Champion Aerospace LLC - [STC SA593CH](https://openairdocs.org/stc/SA593CH): Install Champion SlickSTART magneto booster system.. Champion Aerospace LLC - [STC SA710AL](https://openairdocs.org/stc/SA710AL): Installation of EDO 089-2000 or model 089/089A2000 twin seaplane floats. STC jointly owned with Kenmore Air EDO Floats, LLC; 6321 NE 175th St, Kenmore WA 98028-4898. STOL Aviation LLC c/o Tom Csatari - [STC SA714AL](https://openairdocs.org/stc/SA714AL): Installation of Schneider Model SWS-4000 main wheel skis and Schneider Model SWS-1000 tail wheel skis.. Schneider Richard J - [STC SA7965SW](https://openairdocs.org/stc/SA7965SW): Application of fabric and polyurethane finishing system.. Shady Aviation LLC - [STC SA946GL](https://openairdocs.org/stc/SA946GL): Superseded by STC SA01944CH. Modify for unleaded automotive gasoline, 87 minimum antiknock index.. EAA Aviation Foundation All 58: https://openairdocs.org/model/interstate-s-1b2/stcs.md ## NTSB investigations (3) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB ANC90LA151](https://openairdocs.org/ntsb/ANC90LA151), Aug 20, 1990: Artic S1B2 (N52AT), Talkeetna, AK, substantial damage. Probable cause: THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN AIR SPEED ON TAKEOFF. - [NTSB ANC87LA164](https://openairdocs.org/ntsb/ANC87LA164), Sep 20, 1987: Interstate S-1B2 (N50AA), Beluga River, AK, substantial damage - [NTSB ANC86FA114](https://openairdocs.org/ntsb/ANC86FA114), Jul 27, 1986: Interstate S-1B2 (N51AA), Wasilla, AK, substantial damage, 2 fatal ## FAA accident and incident reports (4) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Incident 20020425009819I](https://openairdocs.org/incident/20020425009819I), Apr 25, 2002: Arctic S1B2 (N50AA), Birchwood, AK, Minor damage. (-23) At touchdown, the wheel equipped aircraft's left gear oleo fitting "tab" fractured at the factory weld. When the gear failed, the aircraft made an… - [Accident 19900820038159A](https://openairdocs.org/incident/19900820038159A), Aug 20, 1990: Arctic S1B2 (N52AT), Talkeetna, AK, Substantial damage. Lifted off from a lake but settled to water,continued to another liftoff then struck trees on climbout. - [Accident 19870920054269A](https://openairdocs.org/incident/19870920054269A), Sep 20, 1987: Arctic S1B2 (N50AA), Beluga River, AK, Substantial damage. The float equipped aircraft struck the shore during lake operations. Pilot attempted go around after touchdown. - [Accident 19860727034979A](https://openairdocs.org/incident/19860727034979A), Jul 27, 1986: Arctic S1B2 (N51AA), Wasilla, AK, Substantial damage, 1 fatal. Floatplane impacted lake after takeoff. Pilot failed to maintain flying speed. History of disregarding regulations. ## Service difficulty reports (1) As reported by operators and repair stations, by the model named in the report. - [SDR 2009FA0000792](https://openairdocs.org/sdr/2009FA0000792), Aug 12, 2009: ARM. CRACKED. THE STEERING ARM ON LT SIDE OF THE TAILWHEEL ASSY WAS FOUND CRACKED ACROSS THE RADIUS OF BEND NEAR THE HUB OF THE STEERING ASSY. THIS WAS FOUND ON A PREFLIGHT I ## The same model under other registry codes Amateur-built copies and renamed makers get their own codes. - [Arctic S-1B2](https://openairdocs.org/model/arctic-s-1b2): 15 registered aircraft, registry code 0790208 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.