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Type Record · As of May 3, 2026

INTERSTATE S-1B1

Fixed Wing Single Engine · FRANKLIN 4ACG199H3

Registered

22

Year Range

1942–1993

NTSB Events

7

Airworthiness Directives

0

Aircraft Resources

Engine · Franklin Engine Corp (PZL-Aero) → Search FAA TCDS →

01 /  Distribution

Where the fleet lives and was built

Counts of currently-registered INTERSTATE S-1B1 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.

By State (top 10)

  • AK 18.2% 4
  • NM 13.6% 3
  • IL 9.1% 2
  • OR 9.1% 2
  • NY 4.5% 1
  • OH 4.5% 1
  • MI 4.5% 1
  • WY 4.5% 1
  • CO 4.5% 1
  • WA 4.5% 1

+5 more states

By Decade of Manufacture

  • 1940s 59.1% 13
  • 1990s 4.5% 1
  • Unknown 36.4% 8

02 /  NTSB Records

Events involving INTERSTATE S-1B1 aircraft

7 event(s) on file. Showing the most recent 7.

03 /  Airworthiness Directives

FAA directives applicable to INTERSTATE S-1B1

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-1B1

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

06 /  Supplemental Type Certificates

Modifications approved for INTERSTATE S-1B1

12 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 ↗

  • 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 ↗

  • 10/31/2008

    STC SA622AL

    Modification of powerplant installation, fuselage (other than weld assembly), wing flaps, and tail wheel installation to conform to the designs of the corresponding installations, …

    STOL Aviation LLC c/o Tom Csatari

    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 ↗

  • 05/14/2007

    STC SA00478CH (PAGE 2)

    Installation of Cooper Superflite 102 Fabric.

    Aviation Products Systems 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 ↗

  • 04/02/2003

    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-1B1

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.

  • UAV-1004236-001#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID140569287920230707211335.0001##

    AV-30-C

    uAvionix Corporation replaces Modification Part

    PMA holder →

04 /  Regulations watching this type

Advisory Circulars and Federal Register activity for INTERSTATE S-1B1

05 /  Aircraft of this type

All 22 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.

22 of 22
N-number St Year NTSB FAA
N2778Q IL — ● Look up ↗
N30809 NY 1993 · Look up ↗
N3771Z OH 1943 · Look up ↗
N43LG MI — · Look up ↗
N46023 NM 1943 · Look up ↗
N46243 OR — ● Look up ↗
N46333 NM 1943 · Look up ↗
N46336 IL 1943 ● Look up ↗
N46962 AK 1943 ● Look up ↗
N47513 AK — · Look up ↗
N47614 WY 1943 · Look up ↗
N48027 AK 1942 ● Look up ↗
N48443 CO 1943 · Look up ↗
N48616 WA 1943 · Look up ↗
N48652 NM 1943 · Look up ↗
N48966 AZ 1943 · Look up ↗
N49061 CA 1943 · Look up ↗
N49105 MT — · Look up ↗
N52413 ND — · Look up ↗
N53250 AK 1943 · Look up ↗
N537KT OR — · Look up ↗
N6513C GA — · Look up ↗

Source — FAA Aircraft Registry · click "Look up" to query the live registry record (owner, address, last airworthiness)

05 /  Sources & Methodology

Every count traces back to a primary US-government source

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