# Grumman G-21 - Type: Aircraft model (FAA registry) - Registry code: 3951202 - Manufacturer (registry): GRUMMAN - Model: G-21 - Aircraft type: Fixed wing multi engine - Category: Airplane - Engines: 2 · Reciprocating - Seats: 8 - Weight class: Up to 12,499 lb - Cruise speed: 150 mph - Certification: Type certificated - Data sheet: [TCDS TC 654](https://openairdocs.org/tcds/TC%20654) (OpenAirDocs) - Holder: Frakes Aviation - Registered aircraft: 1 - Page: https://openairdocs.org/model/grumman-g-21 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 2005-18-20](https://openairdocs.org/ad/2005-18-20): "FASTprop" propeller de-icers · Hartzell PHC-C3YF-1RF/F8468A(B,K)-8R constant speed propeller (STC SA00718LA or 17 others). Effective Oct 14, 2005 - [AD 73-12-06](https://openairdocs.org/ad/73-12-06): Elevator and Rudder Torque Tube Failure · Grumman American G-21 and G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B). Effective Jun 14, 1973 - [AD 72-11-03](https://openairdocs.org/ad/72-11-03): Engine Fuel Starvation · Grumman American G-21 and G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B). Effective May 30, 1972 - [AD 63-27-02](https://openairdocs.org/ad/63-27-02): Rudder Control Push Rod End Fittings · Grumman American G-21 and G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B). Effective Jan 20, 1964 - [AD 46-38-01](https://openairdocs.org/ad/46-38-01): Vacuum System Tubing · Grumman American G-21 and G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B) ## Registered aircraft (1) - [N159F](https://openairdocs.org/aircraft/N159F): [Freshwater Adventures Inc](https://openairdocs.org/faa-owner/FRESHWATER%20ADVENTURES%20INC), [Dillingham, AK](https://openairdocs.org/faa-place/AK/Dillingham), built 1944, S/N B55 ## NTSB investigations (2) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB DCA78AA021](https://openairdocs.org/ntsb/DCA78AA021), Sep 2, 1978: Grumman G-21A (N7777V), St Thomas, VI, destroyed, 4 fatal - [NTSB ANC70AA021](https://openairdocs.org/ntsb/ANC70AA021), Jun 22, 1970: Grumman G-21 (N1513V), False Pass, AK, destroyed ## FAA accident and incident reports (1) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Accident 19780902043369A](https://openairdocs.org/incident/19780902043369A), Sep 2, 1978: Gulstm JRF2 (N7777V), St Thomas, Puerto Rico, Destroyed, 4 fatal. STC approved flt at 8750LBS mgw. Test indicate mgw approx 8150LBS. ## Service difficulty reports (1) As reported by operators and repair stations, by the model named in the report. - [SDR CA021028008](https://openairdocs.org/sdr/CA021028008), Oct 27, 2002: ENGINE. MAKING METAL. (CAN) PILOT NOTICED ENGINE RUNNING ROUGH ON LAST FLIGHT. PROCEEDED TO DO PERFORMANCE RUNS ON GROUND AND FOUND ENGINE WOULD NOT DEVELOP POWER. MAINTENANCE PULLED ## STCs that may be installed (OpenAirDocs) (35) 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 SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels 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 SA02738CH](https://openairdocs.org/stc/SA02738CH): Installation of L-3 Communications Avionics Systems. Acron Aviation Inc - [STC SA04046CH PAGE 1](https://openairdocs.org/stc/SA04046CH%20PAGE%201): Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500). Acron Aviation Inc - [STC SA39CH](https://openairdocs.org/stc/SA39CH): Installation of an Amphibian Landing Gear Position Advisory System/Laser Gear Advisory System. Wipaire Inc - [STC SA01757WI](https://openairdocs.org/stc/SA01757WI): To allow the use of UL91 or UL94 (minimum) grade aviation fuel. Swift Fuels LLC - [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 SA11174SC PAGE 1](https://openairdocs.org/stc/SA11174SC%20PAGE%201): Installation of BendixKing by Honeywell KSN 770 and KSN 765 WAAS LPV approach capable nav/comm systems. Honeywell International Inc (Bendix King) - [STC SA01831WI](https://openairdocs.org/stc/SA01831WI): To allow the use of UL91 (minimum) grade aviation fuel. Petersen Aviation 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 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 SA6070NM](https://openairdocs.org/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 - [STC SA01282NY](https://openairdocs.org/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 - [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 SA02428SE](https://openairdocs.org/stc/SA02428SE): Installation of an Air Stream Switch for an electric time recording device on non-pressurized aircraft. Henry F Rogers/David E Polley - [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 SA02119SE PAGE 1](https://openairdocs.org/stc/SA02119SE%20PAGE%201): Installation of Garmin GDL 88 ADS-B UAT Transceiver System. Garmin International Inc - [STC SA00478CH](https://openairdocs.org/stc/SA00478CH): Installation of Cooper Superflite 102 Fabric. Aviation Products Systems Inc - [STC SA02442AK PAGE 1](https://openairdocs.org/stc/SA02442AK%20PAGE%201): Approval of the L-3 Communications NGT 2000/2500 ADS-B system. ADS-B Technologies, LLC - [STC SA02121SE](https://openairdocs.org/stc/SA02121SE): Installation of Garmin GTS 825 (TAS) or GTS 855 (TCAS I) Traffic System. Garmin International Inc - [STC SA00432SE](https://openairdocs.org/stc/SA00432SE): Installation of EGT 701 series fuel flow instrument. J P Instruments - [STC SA00861SE](https://openairdocs.org/stc/SA00861SE): Installation of J.P. Instruments (JPI) fuel flow indicating system. J P Instruments - [STC SA03148NY](https://openairdocs.org/stc/SA03148NY): The installation of the Latitude Technologies Corporation S100 Tracking System. Latitude Technologies Corporation - [STC SA02016SE-D](https://openairdocs.org/stc/SA02016SE-D): Installation of Garmin GTS 800, GTS 820 or GTS 850 Traffic System. Garmin International Inc - [STC ST02540AT-D](https://openairdocs.org/stc/ST02540AT-D): Installation of replacement fuel tank sealant system. FFC Manufacturing - [STC SA101WE](https://openairdocs.org/stc/SA101WE): Installation of picture window. Atlantic Coast Sea Planes LLC - [STC SA4-1467](https://openairdocs.org/stc/SA4-1467): Installation of retractable tip floats. Atlantic Coast Sea Planes LLC - [STC SA8075SW](https://openairdocs.org/stc/SA8075SW): Installation of fiberglass covering. (M-62 SERIES PT-19) (G-73 SCHWEIZER). Razorback Fabrics Inc - [STC SA96NW](https://openairdocs.org/stc/SA96NW): Installation of Sorm Industries horizontal stabilizer forward support fitting. Sorm Industries - [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 - [STC SA02153LA](https://openairdocs.org/stc/SA02153LA) (historical): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System. Garmin AT Inc ## The same model under other registry codes Amateur-built copies and renamed makers get their own codes. - [Scarborough G-21](https://openairdocs.org/model/scarborough-g-21): 0 registered aircraft, registry code 056022U --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.