# Grumman/Mckinnon Enterprises G21G

- Type: Aircraft model (FAA registry)
- Registry code: 395069H
- Manufacturer (registry): GRUMMAN/MCKINNON ENTERPRISES
- Model: G21G
- Aircraft type: Fixed wing multi engine
- Category: Airplane
- Engines: 2 · Turbo-prop
- Seats: 10
- Weight class: 12,500 to 19,999 lb
- Certification: Type certificated
- Data sheet: [TCDS 4A24](https://openairdocs.org/tcds/4A24) (OpenAirDocs)
- Holder: Atlantic Coast Seaplanes LLC
- Registered aircraft: 1
- Page: https://openairdocs.org/model/grumman-mckinnon-enterprises-g21g

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## 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 73-07-05](https://openairdocs.org/ad/73-07-05): Elevator or Rudder Torque Tube Assys · Atlantic Coast Seaplanes G-21C, G-21D, G-21E and 1 more

## Registered aircraft (1)

- [N640](https://openairdocs.org/aircraft/N640): [Teufel Holly Farms Inc](https://openairdocs.org/faa-owner/TEUFEL%20HOLLY%20FARMS%20INC), [Portland, OR](https://openairdocs.org/faa-place/OR/Portland), built 1944, S/N 1201

## NTSB investigations

None matched to aircraft with this model.

## FAA accident and incident reports

None matched to aircraft with this model.

## Service difficulty reports (1)

As reported by operators and repair stations, by the model named in the report.

- [SDR CA100817002](https://openairdocs.org/sdr/CA100817002), Aug 2, 2010: ENGINE. FAILED. DURING REVENUE FLIGHT, ENGINE WAS MAKING AN UNUSUAL NOISE ON APPROACH. THE NOISE FOLLOWED POWER LEVER MOVEMENTS AND PARAMETERS SHIFTED NOTICEABLY UPWARD. ENGINE

## STCs that may be installed (OpenAirDocs) (28)

Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC SA02571SE](https://openairdocs.org/stc/SA02571SE): Installation of Garmin G500/G600 TXi Integrated Avionics System (Primary Flight Display, Multi-Function Display, and Engine Indicating System Display). Garmin International 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 SA02019SE-D](https://openairdocs.org/stc/SA02019SE-D): Installation of Garmin Model GTN 625/635/650; 725/750 Navigation System. Garmin International Inc
- [STC SA02658SE](https://openairdocs.org/stc/SA02658SE): Installation of Garmin GI 275 Multi-Function Display System. Garmin International Inc
- [STC SA04776NY](https://openairdocs.org/stc/SA04776NY): The HIPEC Covering and Finishing System must be performed and maintained. HIPEC Aircraft Coatings Inc
- [STC SA02444AK](https://openairdocs.org/stc/SA02444AK): Approval of the L-3 Communications NGT 9000/9000R ADS-B system installed. ADS-B Technologies LLC
- [STC SA01714WI](https://openairdocs.org/stc/SA01714WI): Installation of a Garmin transponders: (a) GTX 330/330D/33/33D with ADS-B Out functionality; (b) GTX 335/335R/345/345R with ADS-B Out and In functionality; or (c) GTX 335R/345R with ADS-B Out functionality in select airplanes installed with G950/G1000 systems. Garmin International Inc
- [STC SA00344BO PAGE 1](https://openairdocs.org/stc/SA00344BO%20PAGE%201): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. Whelen Aerospace Technologies
- [STC SA02632SE](https://openairdocs.org/stc/SA02632SE): Installation of a Pratt and Whitney PT6A-35 engine flat rated to existing horsepower of the original Pratt and Whitney PT6A-28 and associated instrument marking changes. Teufel Nursery Inc
- [STC SA02153LA-D PAGE 1](https://openairdocs.org/stc/SA02153LA-D%20PAGE%201): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System. Garmin 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 SA00382BO](https://openairdocs.org/stc/SA00382BO): Installation of Globalstar Antenna and Cradle provisions to support a Globalstar GPS-1700 in non-composite airplanes. Avidyne Corporation
- [STC SA00343BO](https://openairdocs.org/stc/SA00343BO): Installation of a single configuration or a dual configuration Avidyne Corporation Integrated Flight Display, Model IFD540 loaded with Release 10.0 software (or later FAA approved release). Avidyne Corporation
- [STC SA00352BO PAGE 1](https://openairdocs.org/stc/SA00352BO%20PAGE%201): Installation of an Avidyne Corporation Mode A/C/S Transponder with ADS-B Out capability, Model AXP340 loaded with Version 3.13 software (or later FAA approved version),. Avidyne Corporation
- [STC SA01734SE](https://openairdocs.org/stc/SA01734SE): Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts. Andrew D. Humphrey
- [STC SA02119SE PAGE 1](https://openairdocs.org/stc/SA02119SE%20PAGE%201): Installation of Garmin GDL 88 ADS-B UAT Transceiver System. Garmin International Inc
- [STC SA02121SE](https://openairdocs.org/stc/SA02121SE): Installation of Garmin GTS 825 (TAS) or GTS 855 (TCAS I) Traffic System. Garmin International Inc
- [STC ST02540AT-D](https://openairdocs.org/stc/ST02540AT-D): Installation of replacement fuel tank sealant system. FFC Manufacturing
- [STC SP00400SE](https://openairdocs.org/stc/SP00400SE): Installation of various propeller electrical de-icer models. SMR Technologies
- [STC SA01606SE](https://openairdocs.org/stc/SA01606SE): Installation of an electrical/electronics system including contemporary electronic appliances, control devices and interface wiring in accordance with Teufel Nursery, Inc. MDL G21G-00006-01, Revision -1, dated August 12, 2005 or later approved MDL on Aero Planes, LLC, Model G-21G, s/n 1201. Teufel Nursery Inc
- [STC SA8075SW](https://openairdocs.org/stc/SA8075SW): Installation of fiberglass covering. (M-62 SERIES PT-19) (G-73 SCHWEIZER). Razorback Fabrics Inc
- [STC SA1008WE](https://openairdocs.org/stc/SA1008WE): Installation of Poly-Fiber covering material. Poly-Fiber Inc
- [STC SA02168AK](https://openairdocs.org/stc/SA02168AK): Installation of hourmeter airspeed switch. For unpressurized aircraft only. Pressurized aircraft must have pressurization system deactivated. Avalaska Inc
- [STC SA812NE](https://openairdocs.org/stc/SA812NE): Installation of BF Goodrich Model 6975-1 De-Icer kit or BF Goodrich Model 6975-10 De-Icer kit. BF Goodrich Aerospace
- [STC SA3494SW-D](https://openairdocs.org/stc/SA3494SW-D): Installation of a century automatic flight system. Century Flight Systems Inc
- [STC SA1351WE](https://openairdocs.org/stc/SA1351WE): Replace existing fabric on wings, fuselage, empennage, and/or control surfaces, with Ceconite101 material. (262A Series -12). Ceconite Inc
- [STC SA2809WE](https://openairdocs.org/stc/SA2809WE): Installation of AiResearch TPE331-2UA-203D engines, increase in fuselage length. McKinnon Enterprises Inc
- [STC SA02153LA-D](https://openairdocs.org/stc/SA02153LA-D) (historical): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System. Garmin International Inc

## PMA parts (OpenAirDocs) (62, first 50)

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this model on its data sheet, so check the FAA record before relying on it. Newest first.

- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID116070308420220706160046.0001): Whelen Aerospace Technologies · PMA PQ1372CE · Jun 21, 2022
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID329398621520210622142449.0001): AeroLEDs LLC · PMA PQ5259NM · Mar 11, 2021
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID145013121202107021752120.0001): Aspen Avionics · PMA PQ03868SW · Jan 20, 2021
- [9100-001-C](https://drs.faa.gov/browse/excelExternalWindow/DD343890DCD8BFDB86258569004013FB.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9100-001-D](https://drs.faa.gov/browse/excelExternalWindow/C7B6725B325949E98625856900401478.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9200-000-B](https://drs.faa.gov/browse/excelExternalWindow/BD58B0712CA0C6AA86258569004016AD.0001): MaxPulse Landing Light Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9100-001-G](https://drs.faa.gov/browse/excelExternalWindow/ADE62C91D97E8B788625856900401557.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9100-001-E](https://drs.faa.gov/browse/excelExternalWindow/A37F050253EE808A86258569004014BA.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9200-000-A](https://drs.faa.gov/browse/excelExternalWindow/8E10EF4D973C1D6D8625856900401662.0001): MaxPulse Landing Light Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9100-001-A](https://drs.faa.gov/browse/excelExternalWindow/62DC748A2B9B1D9386258569004012FD.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9100-001-F](https://drs.faa.gov/browse/excelExternalWindow/3746AAB4CC0D6883862585690040151B.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9100-001-B](https://drs.faa.gov/browse/excelExternalWindow/32446D71EB78157686258569004013B2.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [01-0771833-20](https://drs.faa.gov/browse/excelExternalWindow/FFF505DF238D9E3E86258557004EB967.0001): LED Landing Light. Whelen Aerospace Technologies · PMA PQ1372CE · Modification part · May 30, 2019
- [01-0771833-25](https://drs.faa.gov/browse/excelExternalWindow/D17366A21258BFC186258557004EB9A2.0001): LED Landing Light. Whelen Aerospace Technologies · PMA PQ1372CE · Modification part · May 30, 2019
- [01-0771833-10](https://drs.faa.gov/browse/excelExternalWindow/D0F0E113B870DF1C86258557004EB8E0.0001): LED Landing Light. Whelen Aerospace Technologies · PMA PQ1372CE · Modification part · May 30, 2019
- [01-0771833-15](https://drs.faa.gov/browse/excelExternalWindow/CB6A5B42DF6A574686258557004EB925.0001): LED Landing Light. Whelen Aerospace Technologies · PMA PQ1372CE · Modification part · May 30, 2019
- [01-0790750-10](https://drs.faa.gov/browse/excelExternalWindow/8FBCEA35A3837D6386258557004EB9D7.0001): LED Landing Light. Whelen Aerospace Technologies · PMA PQ1372CE · Modification part · May 30, 2019
- [01-0790750-20](https://drs.faa.gov/browse/excelExternalWindow/5919E033D600DA3386258557004EBA0C.0001): LED Landing Light. Whelen Aerospace Technologies · PMA PQ1372CE · Modification part · May 30, 2019
- [87-05208-001](https://drs.faa.gov/browse/excelExternalWindow/C4B8A8A2B2422B728625822E007853B6.0001): Assembly, Light, PAR 46 Landing. Astronics Luminescent Systems Inc · PMA PQ0786NE · Replaces 01-0790750-20 · Jan 23, 2018
- [87-05207-002](https://drs.faa.gov/browse/excelExternalWindow/4BE4BA39295AB01E862581760058C64D.0001): Assembly, Light, PAR 36 Taxi. Astronics Luminescent Systems Inc · PMA PQ0786NE · Replaces 01-0771833-25 · Aug 1, 2017
- [87-05207-001](https://drs.faa.gov/browse/excelExternalWindow/4ACD6BDF5990D9C7862581760058C571.0001): Assembly, Light, PAR 36 Landing. Astronics Luminescent Systems Inc · PMA PQ0786NE · Replaces 01-0771833-20 · Aug 1, 2017
- [01-0771833-20](https://drs.faa.gov/browse/excelExternalWindow/C4A392C20DA3333A86257FCC006EBC03.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Apr 20, 2016
- [01-0771833-25](https://drs.faa.gov/browse/excelExternalWindow/618915409FDEC97186257FCC006EBC05.0001): LED Taxi Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Apr 20, 2016
- [01-0771833-15](https://drs.faa.gov/browse/excelExternalWindow/466B93ACC46B636486257FCC006EBC01.0001): LED Taxi Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Apr 20, 2016
- [01-0771833-10](https://drs.faa.gov/browse/excelExternalWindow/3073DD83C9E2984D86257FCC006EBBFD.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Apr 20, 2016
- [01-0790750-20](https://drs.faa.gov/browse/excelExternalWindow/2D8AB0D7C6000CA786257FCA00724738.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Apr 20, 2016
- [01-0790750-10](https://drs.faa.gov/browse/excelExternalWindow/0ABFC613100772D586257FCA00724733.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Apr 20, 2016
- [01-0771833-25](https://drs.faa.gov/browse/excelExternalWindow/C9CCFBAEBBB8E59786257DA40070CDE7.0001): LED Taxi Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Nov 17, 2014
- [01-0790750-20](https://drs.faa.gov/browse/excelExternalWindow/8BABE61FB3A3B87486257DA40070CF70.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Nov 17, 2014
- [01-0790750-10](https://drs.faa.gov/browse/excelExternalWindow/710F81D464DB10C086257DA40070CE6C.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Nov 17, 2014
- [01-0771833-10](https://drs.faa.gov/browse/excelExternalWindow/531D5DFD7F5CEFD186257DA40070CC32.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Nov 17, 2014
- [01-0771833-15](https://drs.faa.gov/browse/excelExternalWindow/45B13A366BF3D2BC86257DA40070CCC4.0001): LED Taxi Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Nov 17, 2014
- [01-0771833-20](https://drs.faa.gov/browse/excelExternalWindow/1231682C8DE415F886257DA40070CD50.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Nov 17, 2014
- [700-00188-XXX](https://drs.faa.gov/browse/excelExternalWindow/DA3A5EF9E847308186257D51004EEACA.0001): Tray, IFD5XX series. Avidyne Corporation · PMA PQ4035CE · Modification part · Aug 12, 2014
- [01-0790750-10](https://drs.faa.gov/browse/excelExternalWindow/F062EE86176B529186257D41006B00FB.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Aug 11, 2014
- [01-0771833-10](https://drs.faa.gov/browse/excelExternalWindow/CDF3CBF4A9DF8E5186257D41006314EC.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Aug 11, 2014
- [01-0771833-25](https://drs.faa.gov/browse/excelExternalWindow/CC553009578F018D86257D41006314FF.0001): LED Taxi Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Aug 11, 2014
- [01-0771833-15](https://drs.faa.gov/browse/excelExternalWindow/B8BDEC0170958DC786257D41006314F2.0001): LED Taxi Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Aug 11, 2014
- [01-0771833-20](https://drs.faa.gov/browse/excelExternalWindow/6D27063591FDEECB86257D41006314FC.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Aug 11, 2014
- [01-0790750-20](https://drs.faa.gov/browse/excelExternalWindow/489ECACB4E8E70E786257D41006AFD92.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Aug 11, 2014
- [01-0790623-20](https://drs.faa.gov/browse/excelExternalWindow/78D3E0A35B9FA73A862578B80071B80F.0001): LED PAR46 Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Replaces 01-07790623-20 · Jun 13, 2011
- [01-0790623-10](https://drs.faa.gov/browse/excelExternalWindow/376C9221A5BF6769862578B80071B7DF.0001): LED PAR46 Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Replaces 01-07790623-10 · Jun 13, 2011
- [01-0771424-20](https://drs.faa.gov/browse/excelExternalWindow/FBD323A4242824E886257808004EE857.0001): LED PAR36 Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Replaces 01-0771424-20 · Dec 1, 2010
- [01-0771424-25](https://drs.faa.gov/browse/excelExternalWindow/E6EE53EAA96D4CCB86257808004EE889.0001): LED PAR36 Taxi Light. Whelen Engineering Co Inc · PMA PQ0610NE · Replaces 01-0771424-25 · Dec 1, 2010
- [01-0771424-10](https://drs.faa.gov/browse/excelExternalWindow/757F217111FC33B186257808004EE7E4.0001): LED PAR36 Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Replaces 01-0771424-10 · Dec 1, 2010
- [01-0771424-15](https://drs.faa.gov/browse/excelExternalWindow/05DF4E4D12587E5186257808004EE820.0001): LED PAR36 Taxi Light. Whelen Engineering Co Inc · PMA PQ0610NE · Replaces 01-0771424-15 · Dec 1, 2010
- [5735](https://drs.faa.gov/browse/excelExternalWindow/A0F44F6B08E010BD86257065006C8E34.0001): Propeller De-Icer. Goodrich Corporation · PMA PQ0822NE · Modification part · Jun 17, 2005
- [6975-11](https://drs.faa.gov/browse/excelExternalWindow/3AB501C3FA1D6F3186257065006CC462.0001): Propeller De-Icer. Goodrich Corporation · PMA PQ0822NE · Modification part · Jun 17, 2005
- [E-5735-2E](https://drs.faa.gov/browse/excelExternalWindow/E77D50CDFC5249968525704300613639.0001): Locknut, Terminal Screw. Goodrich Corporation · Modification part · Aug 3, 2004
- [E-5735-3](https://drs.faa.gov/browse/excelExternalWindow/83E19781F7D131DA852570430061363A.0001): Clamp. Cushion. Goodrich Corporation · Modification part · Aug 3, 2004

All of them: https://openairdocs.org/model/grumman-mckinnon-enterprises-g21g/pma.md

## The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

- [Mckinnon G21G](https://openairdocs.org/model/mckinnon-g21g): 2 registered aircraft, registry code 5550120

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