INTERSTATE S-1B2

01 /  Distribution

Where the fleet lives and was built

Counts of currently-registered INTERSTATE S-1B2 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.

02 /  NTSB Records

Events involving INTERSTATE S-1B2 aircraft

3 event(s) on file. Showing the most recent 3.

• Aug 20, 1990

  N52AT

  TALKEETNA, Alaska Minor

  NTSB Docket →

• Sep 20, 1987

  N50AA

  BELUGA RIVER, Alaska

  NTSB Docket →

• Jul 27, 1986

  N51AA

  WASILLA, Alaska Fatal

  NTSB Docket →

03 /  Airworthiness Directives

FAA directives applicable to INTERSTATE S-1B2

No matching airworthiness directives are on file for this make and model in the Federal Register.

04 /  Type Certificate Data Sheets

FAA TCDS for INTERSTATE S-1B2

The TCDS is the legal certification document — weight limits, performance, equipment, AD compliance times, operating limitations. 1 match in the FAA catalog.

• A-754 Current Rev 10 · 10/31/2007

  STOL Aviation LLC

  Models: S-1B1 (Army L-6; XL-6), S-1B2

  Atlas TCDS → DRS ↗

06 /  Supplemental Type Certificates

Modifications approved for INTERSTATE S-1B2

18 STCs on file — every FAA-approved modification, alteration, or installation for this aircraft. STOL kits, avionics, fuel systems, floats, engine swaps, you name it.

• 10/19/2011

  STC SA00478CH (PAGE 2)

  Installation of Cooper Superflite 102 Fabric.

  Aviation Products Systems Inc.

  Atlas STC → DRS ↗

• 09/14/2011

  STC SA00478CH (PAGE 2)

  Installation of Cooper Superflite 102 Fabric.

  Aviation Products Systems Inc.

  Atlas STC → DRS ↗

• 02/01/2010

  STC SA00478CH (PAGE 2)

  Installation of Cooper Superflite 102 Fabric.

  Aviation Products Systems Inc.

  Atlas STC → DRS ↗

• 12/09/2009

  STC SA01015SE (PAGE 1)

  Installation of eligible Alaska Tire and Rubber Company TSO-C62d Tires as listed in Approved Model List SA01015SE, dated November 7, 2001, or later FAA approved revision.

  Alaskan Bushwheel Inc.

  Atlas STC → DRS ↗

• 09/18/2009

  STC SA00478CH (PAGE 2)

  Installation of Cooper Superflite 102 Fabric.

  Aviation Products Systems Inc.

  Atlas STC → DRS ↗

• 05/15/2009

  STC SA00478CH (PAGE 2)

  Installation of Cooper Superflite 102 Fabric.

  Aviation Products Systems Inc.

  Atlas STC → DRS ↗

• 04/17/2009

  STC SA01988SE (PAGE 1)

  Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) MVP-50P.

  Electronics International Inc.

  Atlas STC → DRS ↗

• 03/10/2009

  STC SA01015SE (PAGE 1)

  Installation of eligible Alaska Tire and Rubber Company TSO-C62d Tires as listed in Approved Model List SA01015SE, dated November 7, 2001, or later FAA approved revision.

  Alaskan Bushwheel Inc.

  Atlas STC → DRS ↗

• 03/10/2009

  STC SA01765SE (PAGE 1)

  Installation of Alaskan Bushwheel Inc (ABI) TSO-C26d wheels, Part Number (P/N) ABI-1010.

  Alaskan Bushwheel Inc.

  Atlas STC → DRS ↗

• 05/23/2008

  STC SA00478CH (PAGE 2)

  Installation of Cooper Superflite 102 Fabric.

  Aviation Products Systems Inc.

  Atlas STC → DRS ↗

• 10/31/2007

  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…

  STOL Aviation LLC c/o Tom Csatari

  Atlas STC → DRS ↗

• 05/31/2007

  STC SA01765SE (PAGE 1)

  Installation of Alaskan Bushwheel Inc (ABI) TSO-C26d wheels, Part Number (P/N) ABI-1010.

  Alaskan Bushwheel Inc.

  Atlas STC → DRS ↗

• 05/14/2007

  STC SA00478CH (PAGE 2)

  Installation of Cooper Superflite 102 Fabric.

  Aviation Products Systems Inc.

  Atlas STC → DRS ↗

• 04/18/2006

  STC SA01233SE

  Manufacture of Alaskan Bushwheel, Inc. (ABI) tail wheel and fork assembly per ABI Document ABI-3200B, Revision A, dated April 28, 2005, or later FAA approved revision.

  Alaskan Bushwheel Inc.

  Atlas STC → DRS ↗

• 05/10/2005

  STC SA01233SE

  Manufacture of Alaskan Bushwheel, Inc. (ABI) tail wheel and fork assembly per ABI Document ABI-3200B, Revision A, dated April 28, 2005, or later FAA approved revision. The tail whe…

  Alaskan Bushwheel Inc.

  Atlas STC → DRS ↗

• 03/05/2004

  STC SA01944CH (1 OF 2)

  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 A…

  Experimental Aircraft Association Inc.

  Atlas STC → DRS ↗

• 04/16/2003

  STC SA01015SE

  Installation of eligible Alaska Tire and Rubber Company TSO-C62d Tires as listed in Approved Model List SA01015SE, dated November 7, 2001, or later FAA approved revision.

  Alaskan Bushwheel Inc.

  Atlas STC → DRS ↗

• 04/02/2003

  STC SA00780SE (PAGE 3)

  Installation of the True Lock Safety Retention Axle Lock Nut System.

  True Lock LLC

  Atlas STC → DRS ↗

07 /  PMA replacement parts

FAA-approved replacement parts for INTERSTATE S-1B2

1 parts on file from the FAA Parts Manufacturer Approval database. Each is a non-OEM part the FAA has authorized for use as a replacement on this aircraft type.

• ABI-10650-LW#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID362023949620220228160339.0001##

  Lightweight Wheel Assembly, 10” Diameter

  ABI LLC replaces Modification Article

  PMA holder →

04 /  Regulations watching this type

Advisory Circulars and Federal Register activity for INTERSTATE S-1B2

05 /  Aircraft of this type

All 4 registered N-numbers

Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged ● have NTSB events on file. Tails seeded with full TallyAero pages link directly.

05 /  Sources & Methodology

Every count traces back to a primary US-government source

• FAA Aircraft Registry →

  Refreshed Apr 27, 2026

  Available

• NTSB CAROL →

  Refreshed Apr 27, 2026

  Available

• Federal Register (FAA Airworthiness Directives) →

  Refreshed Apr 27, 2026

  Available

We render counts and lists as the agency publishes them. Read the methodology →