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Type Record · As of May 3, 2026

WEATHERLY 620

Fixed Wing Single Engine · P&W R-985 SERIES

Registered

2

Year Range

1982–1982

NTSB Events

0

Airworthiness Directives

5

Aircraft Resources

Engine · Pratt & Whitney Canada → Search FAA TCDS →

01 /  Distribution

Where the fleet lives and was built

Counts of currently-registered WEATHERLY 620 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.

By State (top 10)

  • NE 50.0% 1
  • IL 50.0% 1

By Decade of Manufacture

  • 1980s 50.0% 1
  • Unknown 50.0% 1

02 /  NTSB Records

Events involving WEATHERLY 620 aircraft

No NTSB-recorded events match WEATHERLY 620 in the indexed corpus.

02c /  Academic Research

Scholarly work mentioning WEATHERLY 620

Papers and reports across NASA, NTSB, FAA CAMI, AOPA ASI, Embry-Riddle, arXiv, and the broader academic graph that mention this airframe. Title or keyword match — drill into each for full abstract + author list + PDF link.

Browse the full corpus — academia portal ↗

03 /  Airworthiness Directives

FAA directives applicable to WEATHERLY 620

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

  • May 11, 2020

    Airworthiness Directives; Weatherly Aircraft Company

    The FAA is adopting a new airworthiness directive (AD) for all Weatherly Aircraft Company (Weatherly) Models 201, 201A, 201B, 201C, 620, 620A, 620B, 620B-TG, and 620TP airplanes. This AD was prompted by reports of fatigue cracking of the center wing and outer wing spar hinge brackets due to corrosion pitting. This AD…

    Atlas AD → Federal Register ↗

  • Sep 18, 2018

    Airworthiness Directives; Weatherly Aircraft Company

    We propose to adopt a new airworthiness directive (AD) for all Weatherly Aircraft Company (Weatherly) Models 201, 201A, 201B, 201C, 620, 620A, 620B, 620B-TG, and 620TP airplanes. This proposed AD was prompted by reports of fatigue cracking of the center wing and outer wing spar hinge brackets due to corrosion pitting.…

    Atlas AD → Federal Register ↗

  • Mar 31, 2016

    Airworthiness Directives; Weatherly Aircraft Company Airplanes

    We are adopting a new airworthiness directive (AD) for all Weatherly Aircraft Company Models 201, 201A, 201B, 201C, 620, 620A, 620B, 620B-TG, and 620TP airplanes. This AD requires visually inspecting the center and outer wing front spar lower hinge fittings for cracks and corrosion and taking all necessary corrective…

    Atlas AD → Federal Register ↗

  • Sep 9, 2005

    Airworthiness Directives; Hartzell Propeller Inc. Propellers

    The FAA is adopting a new airworthiness directive (AD) for certain Hartzell Propeller Inc. propellers. This AD requires inspecting the propeller blades and other critical propeller parts for corrosion and mechanical damage. This AD results from two events where a "Z- shank" blade failed and separated and the results o…

    Atlas AD → Federal Register ↗

  • Dec 29, 2004

    Airworthiness Directives; Hartzell Propeller Inc. Propellers

    The FAA proposes to adopt a new airworthiness directive (AD) for certain Hartzell Propeller Inc. propellers. This proposed AD would require inspecting the propeller blades and other critical propeller parts for corrosion and mechanical damage. This proposed AD results from two events where a "Z-shank" blade failed and…

    Atlas AD → Federal Register ↗

04 /  Type Certificate Data Sheets

FAA TCDS for WEATHERLY 620

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

  • A26WE Current Rev 7 · 12/03/2001

    Weatherly Aircraft Company

    Models: 620B-TG, 620, 620A, 620TP + 1 more

    Atlas TCDS → DRS ↗

06 /  Supplemental Type Certificates

Modifications approved for WEATHERLY 620

62 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 ↗

  • 08/21/2024

    STC SA01757WI

    To allow the use of UL91 or UL94 (minimum) grade aviation fuel

    Swift Fuels LLC

    Atlas STC → DRS ↗

  • 09/01/2022

    STC SA01967WI (3 OF3)

    Use of GAMI G100UL High Octane Unleaded Avgas

    General Aviation Modifications Inc.

    Atlas STC → DRS ↗

  • 07/27/2022

    STC SA01757WI

    To allow the use of UL91 or UL94 (minimum) grade aviation fuel

    Swift Fuels LLC

    Atlas STC → DRS ↗

  • 07/27/2020

    STC SA01831WI

    To allow the use of UL91 (minimum) grade aviation fuel

    Petersen Aviation Inc

    Atlas STC → DRS ↗

  • 06/04/2020

    STC SA02268CH (PAGE 6)

    Installation of Airwolf Filter Corp. Air Oil Separator

    Airwolf Filter Corporation

    Atlas STC → DRS ↗

  • 09/25/2019

    STC SA5190NM

    Installation of Gustin Aviation chip detector light system.

    A & L Aircraft Parts Inc

    Atlas STC → DRS ↗

  • 02/11/2019

    STC SA01831WI

    To allow the use of UL91 (minimum) grade aviation fuel

    ADI LLC

    Atlas STC → DRS ↗

  • 08/27/2018

    STC SA5190NM

    Installation of Gustin Aviation chip detector light system.

    A & L Aircraft Parts, Inc

    Atlas STC → DRS ↗

  • 04/26/2018

    STC SA6070NM

    Installation of a 'quick-disconnect drain plug' on the engine rocker sump for the oil drain retrieval system after engine shutdown.

    West Coast Air Creations

    Atlas STC → DRS ↗

  • 03/13/2018

    STC SA6070NM

    Installation of a 'quick-disconnect drain plug' on the engine rocker sump for the oil drain retrieval system after engine shutdown.

    Richard Zeiler

    Atlas STC → DRS ↗

  • 03/01/2018

    STC SA7965SW

    Application of fabric and polyurethane finishing system.

    Air Tech Coatings

    Atlas STC → DRS ↗

  • 12/20/2017

    STC SA02268CH (PAGE 6)

    Installation of Airwolf Filter Corp. Air Oil Separator

    Airwolf Filter Corporation

    Atlas STC → DRS ↗

  • 12/20/2017

    STC SA01282NY

    Installation of Airwolf remote mounted engine oil filter kit AFC-K015 on aircraft powered by Pratt & Whitney radial reciprocating engine Series R-985, R-1340 and R-1830.

    Airwolf Filter Corporation

    Atlas STC → DRS ↗

  • 03/29/2017

    STC SA5190NM

    Installation of Gustin Aviation chip detector light system.

    A & L Aircraft Parts, Inc

    Atlas STC → DRS ↗

  • 01/24/2017

    STC SA01831WI

    To allow the use of UL91 (minimum) grade aviation fuel

    Petersen Aviation Inc

    Atlas STC → DRS ↗

  • 08/27/2016

    STC SA01240SE (5 OF 5)

    Installation of secondary voltage indication system

    Visual Instruments LLC

    Atlas STC → DRS ↗

  • 05/20/2016

    STC SA01757WI

    To allow the use of UL91 or UL94 (minimum) grade aviation fuel

    Swift Fuels LLC

    Atlas STC → DRS ↗

  • 03/09/2016

    STC SA01757WI

    To allow the use of UL91 or UL94 (minimum) grade aviation fuel

    Petersen Aviation Inc

    Atlas STC → DRS ↗

  • 10/28/2015

    STC SA01757WI

    To allow the use of UL91 (minimum) grade aviation fuel

    Petersen Aviation Inc

    Atlas STC → DRS ↗

  • 06/30/2014

    STC SA02283SE Page 2

    Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P

    Electronics International Inc.

    Atlas STC → DRS ↗

  • 06/24/2014

    STC SA02402SE Page 2

    Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) CGR-30C

    Electronics International Inc.

    Atlas STC → DRS ↗

  • 12/10/2013

    STC SA02283SE Page 2

    Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P

    Electronics International Inc.

    Atlas STC → DRS ↗

  • 08/27/2013

    STC SA02283SE Page 2

    Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P

    Electronics International Inc.

    Atlas STC → DRS ↗

  • 07/25/2013

    STC SA02283SE Page 2

    Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P

    Electronics International Inc.

    Atlas STC → DRS ↗

  • 10/31/2012

    STC SA01282NY

    Installation of Airwolf remote mounted engine oil filter kit AFC-K015 on aircraft powered by Pratt & Whitney radial reciprocating engine Series R-985, R-1340 and R-1830.

    Airwolf Filter Corporation

    Atlas STC → DRS ↗

  • 08/28/2011

    STC SA02268CH (PAGE 6)

    Installation of Airwolf Filter Corp. Air Oil Separator

    Airwolf Filter Corporation

    Atlas STC → DRS ↗

  • 12/09/2009

    STC SA2693NM (PAGE 2)

    Installation of Electronics International digital volt/amp gauges and accessories.

    Electronics International 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 ↗

  • 07/19/2008

    STC SA2586NM (PAGE 4)

    Installation of J.P. Instruments temperature monitoring systems.

    J P Instruments

    Atlas STC → DRS ↗

+ 32 more STCs on file

07 /  PMA replacement parts

FAA-approved replacement parts for WEATHERLY 620

36 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.

  • W/T-1310#https://drs.faa.gov/browse/excelExternalWindow/3FC4CCE4BB7D164C862582DE006A1AA3.0001##

    Weatherly 620 Door Window - RH or LH (Acrylic Green )

    Great Lakes Aero Products Inc replaces 50659-003, 50659-004

    PMA holder →

  • SC-W/G-1310#https://drs.faa.gov/browse/excelExternalWindow/E12F9DF0C3359618862582DE006A1AB1.0001##

    Weatherly 620 Door Window - RH or LH (Acrylic Solar Control Green)

    Great Lakes Aero Products Inc replaces 50659-003, 50659-004

    PMA holder →

  • W-1310 POLY#https://drs.faa.gov/browse/excelExternalWindow/2934AE0B7E6BCAD5862582DE006A1AB8.0001##

    Weatherly 620 Door Window - RH or LH (Polycarbonate Clear)

    Great Lakes Aero Products Inc replaces 50659-003, 50659-004

    PMA holder →

  • W/G-1310#https://drs.faa.gov/browse/excelExternalWindow/DA00302B3E515DC0862582DE006A1AAD.0001##

    Weatherly 620 Door Window - RH or LH (Acrylic Gray)

    Great Lakes Aero Products Inc replaces 50659-003, 50659-004

    PMA holder →

  • W-1310#https://drs.faa.gov/browse/excelExternalWindow/6DB5098538E25DE8862582DE006A1A9F.0001##

    Weatherly 620 Door Window - RH or LH (Acrylic Clear )

    Great Lakes Aero Products Inc replaces 50659-003, 50659-004

    PMA holder →

  • SC-W/G-1310#https://drs.faa.gov/browse/excelExternalWindow/192DAD191ADFC17F862582DE006A1AB2.0001##

    Weatherly 620 Door Window - RH or LH (Acrylic Solar Control Gray)

    Great Lakes Aero Products Inc replaces 50659-003, 50659-004

    PMA holder →

  • 10003A#https://drs.faa.gov/browse/excelExternalWindow/5B27ED6819A40862862581B5006B5E1B.0001##

    Air-Oil Cooler

    Aavid Niagara LLC replaces 8538233

    PMA holder →

  • 10003A#https://drs.faa.gov/browse/excelExternalWindow/6AFDBFF897DA1203862581B5006B5846.0001##

    Air-Oil Cooler

    Aavid Niagara LLC replaces 8538233

    PMA holder →

  • 40223-005#https://drs.faa.gov/browse/excelExternalWindow/4EB55F954C7C6AD986258198006B235E.0001##

    Shim, Hinge, Fitting, Front Spar .250 THK

    AvSpec Corporation replaces 40223-005

    PMA holder →

  • 40852-015#https://drs.faa.gov/browse/excelExternalWindow/161E0CB54830650B86258198006B2626.0001##

    Spacer

    AvSpec Corporation replaces 40852-015

    PMA holder →

  • 40852-001#https://drs.faa.gov/browse/excelExternalWindow/41D05C3B06CCD51786258198006B2588.0001##

    Pin, Center Section

    AvSpec Corporation replaces 40852-001

    PMA holder →

  • 40852-003#https://drs.faa.gov/browse/excelExternalWindow/717CBC7CC08C285886258198006B25D8.0001##

    Cap, CS Type A

    AvSpec Corporation replaces 40852-003

    PMA holder →

  • 40223-008#https://drs.faa.gov/browse/excelExternalWindow/026BEF119C05B0B386258198006B244B.0001##

    Shim, Hinge, Fitting, Rear Spar .050 THK

    AvSpec Corporation replaces 40223-008

    PMA holder →

  • 40223-007#https://drs.faa.gov/browse/excelExternalWindow/AB14C0488CCB47E686258198006B23FC.0001##

    Shim, Hinge, Fitting, Rear Spar .125 THK

    AvSpec Corporation replaces 40223-007

    PMA holder →

  • 40223-015#https://drs.faa.gov/browse/excelExternalWindow/C3EA2025AED27D2A86258198006B2538.0001##

    Bracket, Hinge, Front Wing

    AvSpec Corporation replaces 40223-015

    PMA holder →

  • 40223-014#https://drs.faa.gov/browse/excelExternalWindow/F6F73A57D569F2B186258198006B24EA.0001##

    Bracket, Hinge, Front Wing

    AvSpec Corporation replaces 40223-014

    PMA holder →

  • 40223-004#https://drs.faa.gov/browse/excelExternalWindow/B7BA2C468FAC795F86258198006B22FE.0001##

    Shim, Hinge, Fitting, Front Spar .063 THK

    AvSpec Corporation replaces 40223-004

    PMA holder →

  • 40223-013#https://drs.faa.gov/browse/excelExternalWindow/8E3775CF4B6AB2BC86258198006B2499.0001##

    Bracket, Hinge, Front Wing

    AvSpec Corporation replaces 40223-013

    PMA holder →

  • 40223-002#https://drs.faa.gov/browse/excelExternalWindow/E02062B332F6D03D86258198006B229E.0001##

    Bracket, Hinge, Rear, CS and Wing

    AvSpec Corporation replaces 40223-002

    PMA holder →

  • 40223-006#https://drs.faa.gov/browse/excelExternalWindow/4C954CA2F826498F86258198006B23AC.0001##

    Shim, Hinge, Fitting, Rear Spar .080 THK

    AvSpec Corporation replaces 40223-006

    PMA holder →

  • H50857-1#https://drs.faa.gov/browse/excelExternalWindow/0626EFEA1256F6F086257BB1005DF9A2.0001##

    Tail Landing Gear Spring

    Hershey Flying Service, Inc. replaces 50875-1

    PMA holder →

  • W-2566 Poly#https://drs.faa.gov/browse/excelExternalWindow/ABEF14F767482EDA862579C9004A8A21.0001##

    Weatherly Landing Light Lens-RH or LH (Clear Polycarbonate)

    Great Lakes Aero Products Inc replaces 50279-013

    PMA holder →

  • W-2566#https://drs.faa.gov/browse/excelExternalWindow/988253DAB20A7D13862579C9004A8A00.0001##

    Weatherly Landing Light Lens-RH or LH (Clear Acrylic)

    Great Lakes Aero Products Inc replaces 50279-013

    PMA holder →

  • 10003A#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID155359566020250303152541.0001##

    Air-Oil Cooler

    Aavid Niagara, LLC Technologies replaces 8538233

    PMA holder →

  • SC-W/T-2553-150#https://drs.faa.gov/browse/excelExternalWindow/CE5F4C142C474A498625759800529CF9.0001##

    WEATHERLY 620 WINDSHIELD

    Great Lakes Aero Products replaces 50659-001

    PMA holder →

  • W/T-2553#https://drs.faa.gov/browse/excelExternalWindow/DD44499486A4EB008625759800529BEF.0001##

    WEATHERLY 620 WINDSHIELD

    Great Lakes Aero Products replaces 50659-001

    PMA holder →

  • SC-W/G-2553-150#https://drs.faa.gov/browse/excelExternalWindow/AD2E54940A96D54E8625759800529D20.0001##

    WEATHERLY 620 WINDSHIELD

    Great Lakes Aero Products replaces 50659-001

    PMA holder →

  • W-2553#https://drs.faa.gov/browse/excelExternalWindow/E9944F1B00F38A168625759800529B8E.0001##

    WEATHERLY 620 WINDSHIELD

    Great Lakes Aero Products replaces 50659-001

    PMA holder →

  • SC-W/G-2553#https://drs.faa.gov/browse/excelExternalWindow/93DD18892975F61E8625759800529C50.0001##

    WEATHERLY 620 WINDSHIELD

    Great Lakes Aero Products replaces 50659-001

    PMA holder →

  • W-2553-150#https://drs.faa.gov/browse/excelExternalWindow/1220B5C91D4676628625759800529C7F.0001##

    WEATHERLY 620 WINDSHIELD

    Great Lakes Aero Products replaces 50659-001

    PMA holder →

  • W/G-2553#https://drs.faa.gov/browse/excelExternalWindow/5EDF6F37B41593EC8625759800529BBD.0001##

    WEATHERLY 620 WINDSHIELD

    Great Lakes Aero Products replaces 50659-001

    PMA holder →

  • W/T-2553-150#https://drs.faa.gov/browse/excelExternalWindow/8FB993B91EB7CCF58625759800529CD0.0001##

    WEATHERLY 620 WINDSHIELD

    Great Lakes Aero Products replaces 50659-001

    PMA holder →

  • SC-W/T-2553#https://drs.faa.gov/browse/excelExternalWindow/8F099A39464228CA8625759800529C21.0001##

    WEATHERLY 620 WINDSHIELD

    Great Lakes Aero Products replaces 50659-001

    PMA holder →

  • W/G-2553-150#https://drs.faa.gov/browse/excelExternalWindow/9359A9711FDCFDAC8625759800529CA7.0001##

    WEATHERLY 620 WINDSHIELD

    Great Lakes Aero Products replaces 50659-001

    PMA holder →

  • W-2566 POLY#https://drs.faa.gov/browse/excelExternalWindow/84F5504C5D9733278625759800529FC3.0001##

    WEATHERLY LANDING LIGHT LENS - RH or LH

    Great Lakes Aero Products replaces 50279-013

    PMA holder →

  • W-2566#https://drs.faa.gov/browse/excelExternalWindow/7E5038D79D23FFB68625759800529F9A.0001##

    WEATHERLY LANDING LIGHT LENS - RH or LH

    Great Lakes Aero Products replaces 50279-013

    PMA holder →

04 /  Regulations watching this type

Advisory Circulars and Federal Register activity for WEATHERLY 620

05 /  Aircraft of this type

All 2 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.

2 of 2
N-number St Year NTSB FAA
N4621A NE 1982 · Look up ↗
N9263W IL — · 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 →