Skip to content

Type Record · As of May 3, 2026

GREAT LAKES 2T-1A-1

Fixed Wing Single Engine · LYCOMING 0-320 SERIES

Registered

6

Year Range

1973–1976

NTSB Events

3

Airworthiness Directives

5

Aircraft Resources

Engine · Lycoming Engines → Search FAA TCDS →

01 /  Distribution

Where the fleet lives and was built

Counts of currently-registered GREAT LAKES 2T-1A-1 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.

By State (top 10)

  • AR 16.7% 1
  • NY 16.7% 1
  • NM 16.7% 1
  • TX 16.7% 1
  • ID 16.7% 1
  • WA 16.7% 1

By Decade of Manufacture

  • 1970s 83.3% 5
  • Unknown 16.7% 1

02 /  NTSB Records

Events involving GREAT LAKES 2T-1A-1 aircraft

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

03 /  Airworthiness Directives

FAA directives applicable to GREAT LAKES 2T-1A-1

5 directive(s) on file. Showing the most recent 5.

  • Jun 5, 2012

    Airworthiness Directives; WACO Classic Aircraft Corporation Airplanes

    We are adopting a new airworthiness directive (AD) for certain WACO Classic Aircraft Corporation Models 2T-1A, 2T-1A-1, and 2T-1A-2 airplanes. This AD requires inspection of the front and rear horizontal stabilizer spar assemblies with replacement of parts as necessary. This AD was prompted by cracking of the horizont…

    Atlas AD → Federal Register ↗

  • Dec 16, 2004

    Airworthiness Directives; Great Lakes Aircraft Company, LLC, Models 2T-1A-1 and 2T-1A-2 Airplanes

    The FAA supersedes Airworthiness Directive (AD) 79-20-08, which applies to all Great Lakes Aircraft Company, LLC, (Great Lakes) Models 2T-1A-1 and 2T-1A-2 airplanes with a Lycoming IO-360-B1F6 or AIO-360-B1G6 engine installed. AD 79-20-08 currently requires you to inspect the engine induction system and the alternate…

    Atlas AD → Federal Register ↗

  • Sep 20, 2004

    Airworthiness Directives; Great Lakes Aircraft Company, LLC, Models 2T-1A-1 and 2T-1A-2 Airplanes

    The FAA proposes to supersede Airworthiness Directive (AD) 79- 20-08, which applies to all Great Lakes Aircraft Company, LLC, (Great Lakes) Models 2T-1A-1 and 2T-1A-2 airplanes with a Lycoming IO-360-B1F6 or AIO-360-B1G6 engine installed. AD 79-20-08 currently requires you to inspect the engine induction system and th…

    Atlas AD → Federal Register ↗

  • Nov 30, 1999

    Airworthiness Directives; Precise Flight, Inc. Model SVS III Standby Vacuum Systems

    This amendment adopts a new airworthiness directive (AD) that applies to all aircraft equipped with Precise Flight, Inc. Model SVS III standby vacuum systems installed in accordance with the applicable supplemental type certificate (STC) or through field approval. This AD requires incorporating revised operating limit…

    Atlas AD → Federal Register ↗

  • Jul 7, 1999

    Airworthiness Directives; Precise Flight, Inc. Model SVS III Standby Vacuum Systems

    This document proposes to adopt a new airworthiness directive (AD) that would apply to all U.S. owners and operators of aircraft equipped with Precise Flight, Inc. Model SVS III standby vacuum systems installed in accordance with the applicable supplemental type certificate (STC) or through field approval. The propose…

    Atlas AD → Federal Register ↗

04 /  Type Certificate Data Sheets

FAA TCDS for GREAT LAKES 2T-1A-1

The TCDS is the legal certification document — weight limits, performance, equipment, AD compliance times, operating limitations. 2 matches in the FAA catalog.

05 /  Special Airworthiness Information Bulletins

Advisories applicable to GREAT LAKES 2T-1A-1

1 SAIB on file. SAIBs are FAA advisory notices — not mandatory like ADs, but worth reviewing for service bulletins and emerging issues.

06 /  Supplemental Type Certificates

Modifications approved for GREAT LAKES 2T-1A-1

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

  • 03/01/2025

    STC SA7965SW

    Application of fabric and polyurethane finishing system.

    Shady Aviation LLC

    Atlas STC → DRS ↗

  • 05/17/2024

    STC SA4503NM (PAGE 1)

    Remove original cloth covering and install Ceconite covering

    Ceconite Division of Poly-Fiber Inc.

    Atlas STC → DRS ↗

  • 09/09/2022

    STC SA4503NM (PAGE 1)

    Install Ceconite covering material.

    Ceconite Division of Poly-Fiber Inc

    Atlas STC → DRS ↗

  • 05/18/2022

    STC SA04776NY (2 OF2)

    The HIPEC Covering and Finishing System must be performed and maintained

    HIPEC Aircraft Coatings Inc.

    Atlas STC → DRS ↗

  • 03/01/2018

    STC SA7965SW

    Application of fabric and polyurethane finishing system.

    Air Tech Coatings

    Atlas STC → DRS ↗

  • 08/27/2016

    STC SA01240SE (2 OF 5)

    Installation of secondary voltage indication system

    Visual Instruments LLC

    Atlas STC → DRS ↗

  • 10/19/2011

    STC SA00478CH (PAGE 1)

    Installation of Cooper Superflite 102 Fabric.

    Aviation Products Systems Inc.

    Atlas STC → DRS ↗

  • 09/14/2011

    STC SA00478CH (PAGE 1)

    Installation of Cooper Superflite 102 Fabric.

    Aviation Products Systems Inc.

    Atlas STC → DRS ↗

  • 08/18/2011

    STC SA01669CH (PAGE 2)

    Installation of Challenger Reusable Air Filters.

    Challenger Aviation Products Inc.

    Atlas STC → DRS ↗

  • 05/12/2011

    STC SA01435SE (PAGE 1)

    Installation of J.P. Instruments (JPI) Primary Engine Data Management System.

    J P Instruments

    Atlas STC → DRS ↗

  • 02/25/2011

    STC SA4503NM (Page 1)

    Install Ceconite covering material.

    Ceconite Division of Poly-Fiber Inc

    Atlas STC → DRS ↗

  • 02/14/2011

    STC SA01435SE (PAGE 1)

    Installation of J.P. Instruments (JPI) Primary Engine Data Management System.

    J P Instruments

    Atlas STC → DRS ↗

  • 11/05/2010

    STC SA01669CH (PAGE 2)

    Installation of Challenger Reusable Air Filters.

    Challenger Aviation Products Inc.

    Atlas STC → DRS ↗

  • 02/01/2010

    STC SA00478CH (PAGE 1)

    Installation of Cooper Superflite 102 Fabric.

    Aviation Products Systems Inc.

    Atlas STC → DRS ↗

  • 09/18/2009

    STC SA00478CH (PAGE 1)

    Installation of Cooper Superflite 102 Fabric.

    Aviation Products Systems Inc.

    Atlas STC → DRS ↗

  • 06/26/2009

    STC SA01734SE (PG 2)

    Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts.

    Stewart Thomas D. and Stewart Dan R.

    Atlas STC → DRS ↗

  • 05/15/2009

    STC SA00478CH (PAGE 1)

    Installation of Cooper Superflite 102 Fabric.

    Aviation Products Systems Inc.

    Atlas STC → DRS ↗

  • 04/21/2009

    STC SA01669CH (PAGE 2)

    Installation of Challenger Reusable Air Filters.

    Challenger Aviation Products Inc.

    Atlas STC → DRS ↗

  • 04/16/2009

    STC SA01988SE (PAGE 4)

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

    Electronics International Inc.

    Atlas STC → DRS ↗

  • 01/27/2009

    STC SA01669CH (PAGE 2)

    Installation of Challenger Reusable Air Filters.

    Challenger Aviation Products Inc.

    Atlas STC → DRS ↗

  • 03/18/2008

    STC SA01435SE (PAGE 1)

    Installation of J.P. Instruments (JPI) Primary Engine Data Management System.

    J P Instruments

    Atlas STC → DRS ↗

  • 04/02/2006

    STC SA01240SE (2 OF 5)

    Installation of secondary voltage indication system

    Visual Instruments LLC

    Atlas STC → DRS ↗

  • 07/08/2005

    STC SA00680SE (5 OF 6

    Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer.

    Electronics International

    Atlas STC → DRS ↗

  • 03/12/2004

    STC SA593CH (2 OF 5)

    Install Champion SlickSTART magneto booster system.

    Champion Aerospace LLC

    Atlas STC → DRS ↗

  • 11/10/2003

    STC SA8075SW (PAGE 1)

    Installation of fiberglass covering. (M-62 SERIES PT-19) (G-73 SCHWEIZER)

    Razorback Fabrics Inc

    Atlas STC → DRS ↗

  • 12/31/2002

    STC SA2095NM

    Installation of a Warner R-550-3 engine; a Univair 220 propeller; Cleveland 6100X6 wheels and brakes; Scott 3200 tail wheel; and associated changes.

    Great Lakes Aircraft Co. LLC

    Atlas STC → DRS ↗

  • 03/09/1999

    STC SA00680SE (5 OF 6

    Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer.

    Electronics International

    Atlas STC → DRS ↗

  • 08/09/1994

    STC SA2095NM

    Installation of a Warner R-550-3 engine; a Univair 220 propeller; Cleveland 6100X6 wheels and brakes; Scott 3200 tail wheel; and associated changes.

    Swack Harvey R

    Atlas STC → DRS ↗

  • 07/15/1994

    STC SA7965SW

    Application of fabric and polyurethane finishing system.

    Air Tech Coatings

    Atlas STC → DRS ↗

  • 03/09/1993

    STC SA1626NM Page 1

    Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series)

    Electronics International

    Atlas STC → DRS ↗

+ 6 more STCs on file

07 /  PMA replacement parts

FAA-approved replacement parts for GREAT LAKES 2T-1A-1

26 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.

  • RG-12LSA#https://drs.faa.gov/browse/excelExternalWindow/5F9F2BB23A50D0C5862581DE006902ED.0001##

    Battery

    Concorde Battery Corp replaces RG-12LSA

    PMA holder →

  • RG-25XC#https://drs.faa.gov/browse/excelExternalWindow/946AAD8E805524B5862581DE006902EF.0001##

    Battery

    Concorde Battery Corp replaces RG-25XC

    PMA holder →

  • MDL103216-000#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID199395150120240221143438.0001##

    SkyView HDX Instrumentation

    Dynon Avionics, Inc. replaces Modification Part

    PMA holder →

  • APS66-10500#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120386300920221020170250.0001##

    Brake Lining

    Aviation Products Systems Inc replaces 066-10500

    PMA holder →

  • 151-0001#https://drs.faa.gov/browse/excelExternalWindow/CC4816E39E6621C2862574F7005FA885.0001##

    Red Slave Assembly

    Aeroflash Signal replaces GLAC P/N 00548-1

    PMA holder →

  • 150-0015#https://drs.faa.gov/browse/excelExternalWindow/0E3046CECE47077F862574F7005FA867.0001##

    Beacon Light Flasher Assembly

    Aeroflash Signal replaces Orig. Part

    PMA holder →

  • SC-W/T-2592-DR#https://drs.faa.gov/browse/excelExternalWindow/0FF9E620B998BF1C8625764600501E3B.0001##

    GREAT LAKES TALL WINDSHIELD

    Great Lakes Aero Products replaces 40153-3

    PMA holder →

  • SC-W/G-2592-DR#https://drs.faa.gov/browse/excelExternalWindow/E3FE572B55F094318625764600501E65.0001##

    GREAT LAKES TALL WINDSHIELD

    Great Lakes Aero Products replaces 40153-3

    PMA holder →

  • W/T-2592-DR#https://drs.faa.gov/browse/excelExternalWindow/C56B13C7CC754DEB8625764600501DE2.0001##

    GREAT LAKES TALL WINDSHIELD

    Great Lakes Aero Products replaces 40153-3

    PMA holder →

  • W/G-2592-DR#https://drs.faa.gov/browse/excelExternalWindow/CFDE2414BE24DF0A8625764600501E0D.0001##

    GREAT LAKES TALL WINDSHIELD

    Great Lakes Aero Products replaces 40153-3

    PMA holder →

  • W-2592-DR#https://drs.faa.gov/browse/excelExternalWindow/C195C4961AF843688625764600501DC1.0001##

    GREAT LAKES TALL WINDSHIELD

    Great Lakes Aero Products replaces 40153-3

    PMA holder →

  • SC-W/G-2592#https://drs.faa.gov/browse/excelExternalWindow/A851BEF662FC39B78625764600501D95.0001##

    GREAT LAKES TALL WINDSHIELD

    Great Lakes Aero Products replaces 40153-3

    PMA holder →

  • SC-W/T-2592#https://drs.faa.gov/browse/excelExternalWindow/9269195EABCD6FE58625764600501D69.0001##

    GREAT LAKES TALL WINDSHIELD

    Great Lakes Aero Products replaces 40153-3

    PMA holder →

  • W/T-2592#https://drs.faa.gov/browse/excelExternalWindow/E9A11A2493C9EE968625764600501D1D.0001##

    GREAT LAKES TALL WINDSHIELD

    Great Lakes Aero Products replaces 40153-3

    PMA holder →

  • W/G-2592#https://drs.faa.gov/browse/excelExternalWindow/C7BC44F6FF2E75738625764600501D4A.0001##

    GREAT LAKES TALL WINDSHIELD

    Great Lakes Aero Products replaces 40153-3

    PMA holder →

  • SC-W/T-2591-DR#https://drs.faa.gov/browse/excelExternalWindow/CAA40A561FAE995E8625764600501C9B.0001##

    GREAT LAKES FORWARD WINDSHIELD

    Great Lakes Aero Products replaces 40153-7

    PMA holder →

  • SC-W/G-2591-DR#https://drs.faa.gov/browse/excelExternalWindow/051FC63429444B638625764600501CCD.0001##

    GREAT LAKES FORWARD WINDSHIELD

    Great Lakes Aero Products replaces 40153-7

    PMA holder →

  • W-2592#https://drs.faa.gov/browse/excelExternalWindow/DB85B5165B8C90518625764600501CF3.0001##

    GREAT LAKES TALL WINDSHIELD

    Great Lakes Aero Products replaces 40153-3

    PMA holder →

  • W/T-2591-DR#https://drs.faa.gov/browse/excelExternalWindow/2272F5062D05A4ED8625764600501C4F.0001##

    GREAT LAKES FORWARD WINDSHIELD

    Great Lakes Aero Products replaces 40153-7

    PMA holder →

  • W/G-2591-DR#https://drs.faa.gov/browse/excelExternalWindow/7BEC64464C25DB288625764600501C79.0001##

    GREAT LAKES FORWARD WINDSHIELD

    Great Lakes Aero Products replaces 40153-7

    PMA holder →

  • SC-W/G-2591#https://drs.faa.gov/browse/excelExternalWindow/DBF49E42167980B08625764600501BEB.0001##

    GREAT LAKES FORWARD WINDSHIELD

    Great Lakes Aero Products replaces 40153-7

    PMA holder →

  • W-2591-DR#https://drs.faa.gov/browse/excelExternalWindow/956A9F756075A67B8625764600501C23.0001##

    GREAT LAKES FORWARD WINDSHIELD

    Great Lakes Aero Products replaces 40153-7

    PMA holder →

  • W/G-2591#https://drs.faa.gov/browse/excelExternalWindow/44F2BFD4D9D49A128625764600501B95.0001##

    GREAT LAKES FORWARD WINDSHIELD

    Great Lakes Aero Products replaces 40153-7

    PMA holder →

  • SC-W/T-2591#https://drs.faa.gov/browse/excelExternalWindow/681D35EE72E21AE88625764600501BC0.0001##

    GREAT LAKES FORWARD WINDSHIELD

    Great Lakes Aero Products replaces 40153-7

    PMA holder →

  • W/T-2591#https://drs.faa.gov/browse/excelExternalWindow/5BDF4BB470729AA08625764600501B58.0001##

    GREAT LAKES FORWARD WINDSHIELD

    Great Lakes Aero Products replaces 40153-7

    PMA holder →

  • W-2591#https://drs.faa.gov/browse/excelExternalWindow/A38263F1246B04B88625764600501B26.0001##

    GREAT LAKES FORWARD WINDSHIELD

    Great Lakes Aero Products replaces 40153-7

    PMA holder →

04 /  Regulations watching this type

Advisory Circulars and Federal Register activity for GREAT LAKES 2T-1A-1

05 /  Aircraft of this type

All 6 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.

6 of 6
N-number St Year NTSB FAA
N503GL AR — ● Look up ↗
N506GL NY 1973 · Look up ↗
N507GL NM 1974 · Look up ↗
N508GL TX 1974 ● Look up ↗
N511GL ID 1975 · Look up ↗
N6185L WA 1976 ● 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 →