# N7500S: Schweizer G-164B-20T

- Status: Valid registration
- Airframe: [Schweizer G-164B-20T](https://openairdocs.org/model/schweizer-g-164b-20t) (registry code 8059056, 1 seats)
- Engine: [Pratt & Whitney PT6A series](https://openairdocs.org/engine/pratt-whitney-pt6a-series) (registry code 52032)
- Data sheets: [TCDS 1A16](https://openairdocs.org/tcds/1A16) (Allied Ag Cat Productions Inc.) (OpenAirDocs)
- Serial number: 829B
- Type: Fixed wing single engine
- Engine type: Turbo-prop
- Airworthiness: Restricted, agriculture and pest control
- Airworthiness date: November 27, 1991
- Certificate issued: August 7, 2024
- Expires: August 31, 2031
- Mode S code: AA1C72
- Registered owner: [Hill Ag-Air LLC](https://openairdocs.org/faa-owner/HILL%20AG-AIR%20LLC)
- Location: [Bancroft, ID](https://openairdocs.org/faa-place/ID/Bancroft)
- Owner type: LLC
- Owner's area on the map: 42.7693° N, 111.9270° W: Placed by OpenAirDocs at the center of ZIP code 83217, within about 10 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=7500S
- Page: https://openairdocs.org/aircraft/N7500S

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every Pratt & Whitney PT6A model are included.

## ADs that may apply (OpenAirDocs): 43 in force

### Matched by airframe (Schweizer G-164B-20T)

- [AD 2011-05-07](https://openairdocs.org/ad/2011-05-07): Stabilizers · Allied Ag Cat Productions G-164, G-164A, G-164B and 7 more. Effective Mar 17, 2011
- [AD 2007-17-02](https://openairdocs.org/ad/2007-17-02): Fuel shut-off valve control · Allied Ag Cat Productions G-164, G-164A, G-164B and 7 more. Effective Sep 18, 2007
- [AD 89-18-02 R1](https://openairdocs.org/ad/89-18-02-R1): Elevator Push-Pull Rods · Allied Ag Cat Productions G-164, G-164A, G-164B and 7 more. Effective Nov 24, 1989
- [AD 82-13-06](https://openairdocs.org/ad/82-13-06): Aileron Bellcrank Inspection · Allied Ag Cat Productions G-164B, G-164B-15T, G-164B-20T and 5 more. Effective Jul 5, 1982
- [AD 73-19-10](https://openairdocs.org/ad/73-19-10): Elevator Control Horn · Allied Ag Cat Productions G-164A, G-164B, G-164B-15T and 3 more. Effective Aug 29, 1979
- [AD 78-23-11](https://openairdocs.org/ad/78-23-11): Aileron Balance Cables · Allied Ag Cat Productions G-164, G-164A, G-164B and 5 more. Effective Feb 28, 1979
- [AD 78-26-03](https://openairdocs.org/ad/78-26-03): Wing Fittings Corrosion Detection · Allied Ag Cat Productions G-164, G-164A, G-164B and 4 more. Effective Dec 20, 1978
- [AD 77-19-05](https://openairdocs.org/ad/77-19-05): Flying Wire Terminals · Allied Ag Cat Productions G-164A, G-164B, G-164B-15T and 3 more. Effective Sep 22, 1977
- [AD 75-14-04](https://openairdocs.org/ad/75-14-04): Rudder Cables · Allied Ag Cat Productions G-164, G-164A, G-164B and 4 more. Effective Jul 7, 1977
- [AD 77-13-04](https://openairdocs.org/ad/77-13-04): Placard-Brake Warning · Allied Ag Cat Productions G-164A, G-164B, G-164B-15T and 3 more. Effective Jun 29, 1977
- [AD 76-21-03](https://openairdocs.org/ad/76-21-03): Main Landing Gear Struts · Modified landing gear (Frenco STC SA647WE). Effective Oct 20, 1976
- [AD 67-29-04](https://openairdocs.org/ad/67-29-04): Elevator Forward Pushrod · Allied Ag Cat Productions G-164, G-164A, G-164B and 7 more. Effective Oct 27, 1967
- [AD 66-01-02](https://openairdocs.org/ad/66-01-02): Propeller Cone and Spacer Sets · Allied Ag Cat Productions G-164, G-164A, G-164B and 7 more. Effective Dec 28, 1965
- [AD 63-22-02](https://openairdocs.org/ad/63-22-02): Throttle Control Pivot Bolt · Allied Ag Cat Productions G-164, G-164A, G-164B and 7 more. Effective Oct 26, 1963
- [AD 63-22-01](https://openairdocs.org/ad/63-22-01): Spray Pump Fan Blades · Allied Ag Cat Productions G-164, G-164A, G-164B and 7 more. Effective Oct 25, 1963
- [AD 63-01-01](https://openairdocs.org/ad/63-01-01): Engine Mount Washers · Allied Ag Cat Productions G-164, G-164A, G-164B and 7 more. Effective Jan 5, 1963
- [AD 62-08-07](https://openairdocs.org/ad/62-08-07): Aileron Control Cable Modification · Allied Ag Cat Productions G-164, G-164A, G-164B and 7 more. Effective Apr 25, 1962

### Matched by engine (Pratt & Whitney PT6A series)

- [AD 2024-04-51](https://openairdocs.org/ad/2024-04-51): Turbine Section · Pratt & Whitney Canada PT6A-64, PT6A-66, PT6A-66A and 17 more. Effective Mar 28, 2024
- [AD 2022-08-13](https://openairdocs.org/ad/2022-08-13): Turbine Section · Pratt & Whitney Canada PT6A-34, PT6A-34B, PT6A-34AG and 2 more. Effective May 27, 2022
- [AD 2016-05-13](https://openairdocs.org/ad/2016-05-13): Corrosion and perforation of the two-ply Cu-Be bellows in Woodward FCUs. · Pratt & Whitney Canada PT6A-60AG, PT6A-65AG, PT6A-67AF and 1 more. Effective Apr 22, 2016
- [AD 2014-17-08 R1](https://openairdocs.org/ad/2014-17-08-R1): Compressor turbine (CT) blades · Pratt & Whitney Canada PT6A-114 and PT6A-114A. Effective Jun 5, 2015
- [AD 2014-11-05](https://openairdocs.org/ad/2014-11-05): Reinforcement liner to the power turbine (PT) containment   
  ring and, for certain PT containment rings, adding scallops · Pratt & Whitney Canada PT6A-11, PT6A-110, PT6A-112 and 18 more. Effective Aug 5, 2014
- [AD 2012-09-10](https://openairdocs.org/ad/2012-09-10): First stage sun gears · Pratt & Whitney Canada PT6A-110, PT6A-112, PT6A-114 and 12 more. Effective May 23, 2012
- [AD 2011-25-12](https://openairdocs.org/ad/2011-25-12): Sun gear · Pratt & Whitney Canada PT6A-15AG, PT6A-27, PT6A-28 and 4 more. Effective Dec 28, 2011
- [AD 2011-20-51](https://openairdocs.org/ad/2011-20-51): Gears · Pratt & Whitney Canada PT6A-15AG, PT6A-27, PT6A-28 and 4 more. Effective Nov 1, 2011
- [AD 2004-25-18](https://openairdocs.org/ad/2004-25-18): Propeller governor assemblies · Pratt & Whitney Canada PT6A-60A and PT6A-65B. Effective Jan 18, 2005
- [AD 2002-23-13](https://openairdocs.org/ad/2002-23-13): Turbine Exhaust Ducts · Pratt & Whitney Canada PT6A-11, PT6A-110, PT6A-112 and 20 more. Effective Dec 31, 2002
- [AD 2001-20-01](https://openairdocs.org/ad/2001-20-01): Compressor Bleed Valve Assembly · Pratt & Whitney Canada PT6A-114A and PT6A-25C. Effective Nov 5, 2001
- [AD 97-04-12](https://openairdocs.org/ad/97-04-12): Compressor Bleed-off Valve · Pratt & Whitney Canada PT6A-11, PT6A-110, PT6A-112 and 52 more. Effective Mar 14, 1997
- [AD 95-13-08](https://openairdocs.org/ad/95-13-08): Compressor Turbine Disk · Pratt & Whitney Canada PT6A-67D. Effective Jul 12, 1995
- [AD 93-23-06](https://openairdocs.org/ad/93-23-06): Airframe Chip Detector Flag System · Pratt & Whitney Canada PT6A-50. Effective Jan 26, 1994
- [AD 92-15-11](https://openairdocs.org/ad/92-15-11): Compressor Delivery Air Line (P3) Filter Assembly · Pratt & Whitney Canada PT6A-20, PT6A-20A, PT6A-21 and 7 more. Effective Aug 17, 1992
- [AD 90-12-05](https://openairdocs.org/ad/90-12-05): Engine Overhaul · Pratt & Whitney Canada PT6A-15AG, PT6A-27, PT6A-28 and 3 more. Effective May 30, 1990
- [AD 86-10-05](https://openairdocs.org/ad/86-10-05): First Stage Compressor Hub · Pratt & Whitney Canada PT6A-42. Effective Jun 5, 1986
- [AD 80-08-12](https://openairdocs.org/ad/80-08-12): Fuel Pump Drive Coupling Splines · Pratt & Whitney Canada PT6A-11, PT6A-112, PT6A-135 and 24 more. Effective Apr 18, 1980
- [AD 80-04-02](https://openairdocs.org/ad/80-04-02): Push-Pull Control Terminal · Pratt & Whitney Canada PT6A-20, PT6A-6A, PT6A-6B and 1 more. Effective Feb 8, 1980
- [AD 78-17-07](https://openairdocs.org/ad/78-17-07): Fuel Control Unit · Pratt & Whitney Canada PT6A-38, PT6A-41 and PT6A-45A. Effective Aug 31, 1978
- [AD 78-12-04](https://openairdocs.org/ad/78-12-04): No. 2 Bearing Pressure Oil Transfer Tube Assembly · Pratt & Whitney Canada PT6A-38, PT6A-41 and PT6A-45A. Effective Jun 19, 1978
- [AD 75-06-01](https://openairdocs.org/ad/75-06-01): Gearbox Deterioration · Pratt & Whitney Canada PT6A-20, PT6A-20A, PT6A-20B and 11 more. Effective Apr 1, 1977
- [AD 75-11-04](https://openairdocs.org/ad/75-11-04): Reduction Gearbox Engine Distress · Pratt & Whitney Canada PT6A-20, PT6A-20A, PT6A-20B and 8 more. Effective May 20, 1975
- [AD 70-16-01](https://openairdocs.org/ad/70-16-01): Turbo Propeller Governors · Pratt & Whitney Canada PT6A-11, PT6A-11AG, PT6A-15AG and 5 more. Effective Aug 4, 1970
- [AD 69-23-06](https://openairdocs.org/ad/69-23-06): Fuel Pumps · Pratt & Whitney Canada PT6A-20, PT6A-27, PT6A-28 and 4 more. Effective Nov 15, 1969
- [AD 68-05-03](https://openairdocs.org/ad/68-05-03): Reverse Mode · Pratt & Whitney Canada PT6A-20 and PT6A-6B. Effective Feb 28, 1968

### Historical (superseded or no longer in force)

- [AD 2008-22-21](https://openairdocs.org/ad/2008-22-21) (historical): Main tubular spar · Allied Ag Cat Productions G-164, G-164A, G-164B and 7 more. Effective Dec 19, 2008
- [AD 82-07-04](https://openairdocs.org/ad/82-07-04) (historical): Fuel Shutoff Valve Modification · Allied Ag Cat Productions G-164A, G-164B, G-164B-15T and 6 more. Effective Apr 6, 1982
- [AD 78-08-09](https://openairdocs.org/ad/78-08-09) (historical): Rudder Assembly · Allied Ag Cat Productions G-164, G-164A, G-164B and 4 more. Effective Apr 21, 1978
- [AD 2014-17-08](https://openairdocs.org/ad/2014-17-08) (historical): Compressor turbine (CT) blades · Pratt & Whitney Canada PT6A-114 and PT6A-114A. Effective Oct 8, 2014
- [AD 88-24-02](https://openairdocs.org/ad/88-24-02) (historical): Airframe Chip Detector Flag System · Pratt & Whitney Canada PT6A-50

## Information bulletins (advisory) (6 in force)

- [SAIB CE-11-40](https://openairdocs.org/saib/CE-11-40): Flight Controls: Rudder. Issued Jun 10, 2011
- [SAIB NE-15-21](https://openairdocs.org/saib/NE-15-21): Fuel Injector Nozzle. Issued Aug 19, 2015
- [SAIB NE-12-04](https://openairdocs.org/saib/NE-12-04): Turbine/ Turboprop Engine: Reduction Gearbox. Issued Nov 1, 2011
- [SAIB NE-10-47](https://openairdocs.org/saib/NE-10-47): Turbine Engine Compressor Section. Issued Aug 30, 2010
- [SAIB NE-06-34](https://openairdocs.org/saib/NE-06-34): . Issued Mar 21, 2006
- [SAIB CE-03-24](https://openairdocs.org/saib/CE-03-24): . Issued Feb 19, 2003

## NTSB investigations

None matched to N7500S.

## FAA accident and incident reports

None matched to N7500S.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs) (87, first 50)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Schweizer G-164B-20T)

- [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 SA5581SW](https://openairdocs.org/stc/SA5581SW): Installation of ALCOR true-flow/ totalizer system. Alcor LLC. Lists G-164 Series
- [STC SA01240SE](https://openairdocs.org/stc/SA01240SE): Installation of secondary voltage indication system. Visual Instruments LLC
- [STC SA1151NW](https://openairdocs.org/stc/SA1151NW): Installation of the Flight Grip Model 135 Control Stick Grip. Air Products & Parts LLC
- [STC SA01027CH](https://openairdocs.org/stc/SA01027CH): Installation of GE Aviation Czech s.r.o. Model M601E-11, M601D-11, H75-100, H75-200, H80, H80-100 and H80-200, Pratt & Whitney Canada Corp. Models PT6A-34, PT6A-34AG, PT6A-42 and PT6A-42AG, the AVIA Propeller Ltd. Models V510, V510AG and V508E-AG and Hartzell Propellers Models HC-B4TW-3, HC-B3TN-3AE and HC-B3TN-3 in accordance with Turbine Conversions Drawing List, Report 3000, Revision C, dated September 27, 2018, or later FAA approved revision. Turbine Conversions Ltd
- [STC SA5190NM](https://openairdocs.org/stc/SA5190NM): Installation of Gustin Aviation chip detector light system. A & L Aircraft Parts 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 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 ST03554CH](https://openairdocs.org/stc/ST03554CH): Installation of Rotary Gatekeeper and provisions equipment. Turbine Conversions Ltd
- [STC SA02985CH](https://openairdocs.org/stc/SA02985CH): Installation of a Cool Start System in accordance with Installation Instructions , Revision A, dated April 14, 2011, or later FAA Approved revision. Turbine Conversions Ltd
- [STC SA3528SW](https://openairdocs.org/stc/SA3528SW): Installation of airfoiled horizontal stabilizer and straightening of the vertical fin in accordance with Frakes Drawing List 70002 dated 10/31/85, or later FAA approved revision. Turbine Conversions Ltd. Lists G-164 Series
- [STC SA00068SE](https://openairdocs.org/stc/SA00068SE): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1). Electronics International Inc
- [STC SA02786CH](https://openairdocs.org/stc/SA02786CH): Installation of a Single Point Ground Fueling System. Turbine Conversions Ltd
- [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc
- [STC SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc
- [STC SA01639NY](https://openairdocs.org/stc/SA01639NY): Replacement of 12 refrigerant in air conditioning system with Enviro Refrigerant Hotshot R414B. Scale Modelbuilders Inc
- [STC SA01258SE](https://openairdocs.org/stc/SA01258SE): Installation of the Automatic Flagman Dispenser Models in accordance with Automatic Flagman Master Drawing Lists specified in attached AML, or later FAA approved revision.This STC supercedes several existing STC s as listed in the notes on the attached AML. R-S Sales 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 SA2687NM](https://openairdocs.org/stc/SA2687NM): Installation of Truboplus/ Electronics Int'l gauges and switches. Aero Manufacturing Inc
- [STC SA1626NM PAGE 1](https://openairdocs.org/stc/SA1626NM%20PAGE%201): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International
- [STC ST0000SAT](https://openairdocs.org/stc/ST0000SAT): Installation of a chemical rinsing system. Paul S Woods. Lists G-164 Series
- [STC SA2350NM PAGE 1](https://openairdocs.org/stc/SA2350NM%20PAGE%201): Installation of Electronics International Inc digital carburetor/outside air temperature gauges. Electronics International
- [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International
- [STC SA3862NM PAGE 1](https://openairdocs.org/stc/SA3862NM%20PAGE%201): Installation of Electronics International Primary TIT/EGT/CHT instruments, remote switches and associated accessories. Electronics International
- [STC SA2159SO](https://openairdocs.org/stc/SA2159SO): Installation of chemical evacuation system to remove residue from the agricultural spray dispersal system. (G-164 SERIES RESTRICTED CATEGORY). Paul S Woods. Lists G-164 Series
- [STC SA2190NM PAGE 1](https://openairdocs.org/stc/SA2190NM%20PAGE%201): Installation of electronics International Digital Volt/Amp Gauges and Accessories. Electronics International
- [STC SA2350NM](https://openairdocs.org/stc/SA2350NM) (historical): Installation of Electronics International Inc digital carburetor/outside air temperature gauges listed on the attached continuation sheet and the associated accessories. Electronics International

### Approved for the engine (Pratt & Whitney PT6A series)

- [STC SE12225AC](https://openairdocs.org/stc/SE12225AC): This STC will incorporate P&W 1700 rpm propeller reduction gearbox on P&WC engines to allow 1700 rpm propeller installation. High Cotton Aircraft Conversions, LLC. Lists PT6A-41
- [STC SE00010EN](https://openairdocs.org/stc/SE00010EN): Instructions for Continued Airworthiness for the PT6A-25, and, -25A engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. MORE Company Inc. Lists PT6A-25
- [STC SE000010EN](https://openairdocs.org/stc/SE000010EN): Instructions for Continued Airworthiness for the PT6A-25 and PT6A-25A engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. MORE Company, Inc. Lists PT6A-25
- [STC SE000011EN](https://openairdocs.org/stc/SE000011EN): Instructions for Continued Airworthiness for the PT6A-25C engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. MORE Company, Inc. Lists PT6A-25C
- [STC SE00001EN](https://openairdocs.org/stc/SE00001EN): Engines will be maintained IAW 'Maintenance or Reliable Engines(MORE) Program,' Rev 2, 8/16/95. MORE Company Inc. Lists PT6A-38
- [STC SE00002EN](https://openairdocs.org/stc/SE00002EN): Instructions for Continued Airworthiness for the PT6A-34, -34AG, -34B, -36, -114, -114A, -116, -135, and -135A engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. MORE Company Inc. Lists PT6A-114
- [STC SE00003EN](https://openairdocs.org/stc/SE00003EN): Instructions for Continued Airworthiness for the PT6A-6/C20, -20, -20A and, -20B engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. MORE Company Inc. Lists PT6A-20
- [STC SE00004EN](https://openairdocs.org/stc/SE00004EN): Instructions for Continued Airworthiness for the PT6A-11, -11AG, -15AG, -110 and-112 engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. MORE Company Inc. Lists PT6A-11
- [STC SE00006EN](https://openairdocs.org/stc/SE00006EN): Instructions for Continued Airworthiness for the PT6A-45A, -45B, and, -45R engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. MORE Company Inc. Lists PT6A-45A
- [STC SE00011EN](https://openairdocs.org/stc/SE00011EN): Instructions for Continued Airworthiness for the PT6A-25C engine model that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. MORE Company Inc. Lists PT6A-25C
- [STC SE000EN](https://openairdocs.org/stc/SE000EN): Engines will be maintained IAW 'Maintenance or Reliable Engines(MORE) Program,' Rev 4, dated 8/16/95. MORE Company Inc. Lists PT6A-21
- [STC SE10947SC](https://openairdocs.org/stc/SE10947SC): The conversion of the Pratt & Whitney Canada, Model PT6A-21 to a PT6A-28 turboprop engine. Prime Turbines. Lists PT6A-21
- [STC SE00482SE](https://openairdocs.org/stc/SE00482SE): Incorporation of turbine engine into a twin power section turboprop assembly. Fifty-Ten-Yankee LLC. Lists PT6A-114A
- [STC SE10552SC](https://openairdocs.org/stc/SE10552SC): Conversion of Pratt & Whitney Canada Corp. Model PT6A-27 or -28 to a Model PT6A-34 turboprop engine. Prime Turbines LLC. Lists PT6A-27
- [STC SE11139SC](https://openairdocs.org/stc/SE11139SC): The conversion of the Pratt & Whitney Canada, Model PT6A-135 to a PT6A-135A turboprop engine. Airforce Turbine Service. Lists PT6A-135
- [STC SE11141SC](https://openairdocs.org/stc/SE11141SC): The conversion of the Pratt & Whitney Canada, Model PT6A-15AG to a PT6A-34AG turboprop engine. RT Turbines Inc. Lists PT6A-15AG
- [STC SE02170AT](https://openairdocs.org/stc/SE02170AT): Installation of Pc Safety Valve Kit. Bell Helicopter Textron Inc. Lists PT6A-27
- [STC SE11095SC](https://openairdocs.org/stc/SE11095SC): The conversion of the Pratt & Whitney Canada, Model PT6A-27 to a PT6A-34 turboprop engine. R.T. Turbines, Inc. Lists PT6A-27
- [STC SE01624WI](https://openairdocs.org/stc/SE01624WI): Conversion of Pratt & Whitney Canada, Model PT6A-60A to a North Star Aviation PT6A-60AG turboprop engine. Data required: 1. A copy of this certificate 2. North Star Aviation document, NSA No. 1200, Turboprop Engine Conversion of PT6A-60A Model to PT6A-60AG Configuration per FAA Approved STC , dated March 15, 2011, or later FAA approved revision 3. The ICA supplement for North Star Aviation PT6A-60AG models, Instructions for Continued Airworthiness, NSA No. 1200-ICA, Rev NC, dated March 9, 2011 or later applicable revision. North Star Aviation Inc. Lists PT6A-60A
- [STC SE02837NY](https://openairdocs.org/stc/SE02837NY): The conversion of the Pratt & Whitney Canada PT6A-21 engine to operate as a PT6A-28 engine to be done. Rocky Mountain Aircraft. Lists PT6A-21

All 87: https://openairdocs.org/aircraft/N7500S/stcs.md

## Related

- Other Schweizer G-164B-20T aircraft: https://openairdocs.org/model/schweizer-g-164b-20t/aircraft.md
- The Pratt & Whitney PT6A series engine: https://openairdocs.org/engine/pratt-whitney-pt6a-series.md

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