# N105DA: 1986 Air Tractor AT-301 - Status: Valid registration - Airframe: [Air Tractor AT-301](https://openairdocs.org/model/air-tractor-at-301) (registry code 0390103, 1 seats) - Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) - Data sheets: [TCDS A9SW](https://openairdocs.org/tcds/A9SW) (Air Tractor Inc.) (OpenAirDocs) - Serial number: 3010653 - Year built: 1986 - Type: Fixed wing single engine - Engine type: Reciprocating - Airworthiness: Restricted, agriculture and pest control - Airworthiness date: April 14, 2010 - Certificate issued: May 7, 2026 - Expires: May 31, 2033 - Mode S code: A01793 - Registered owner: [Kenmore Crew Leasing Inc Trustee](https://openairdocs.org/faa-owner/KENMORE%20CREW%20LEASING%20INC%20TRUSTEE) - Location: [Bellingham, WA](https://openairdocs.org/faa-place/WA/Bellingham) - Owner type: Corporation - Owner's area on the map: 48.7973° N, 122.4315° W: Placed by OpenAirDocs at the center of ZIP code 98226, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=105DA - Page: https://openairdocs.org/aircraft/N105DA 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. ## ADs that may apply (OpenAirDocs): 11 in force ### Matched by airframe (Air Tractor AT-301) - [AD 2021-05-14](https://openairdocs.org/ad/2021-05-14): TE flap control system · Air Tractor AT-250, AT-300, AT-301 and 19 more. Effective Apr 29, 2021 - [AD 2008-26-01](https://openairdocs.org/ad/2008-26-01): Overturn skid plate kit · Air Tractor AT-250, AT-300, AT-301 and 15 more. Effective Jan 28, 2009 - [AD 2008-09-10](https://openairdocs.org/ad/2008-09-10): Aluminum spar caps · Air Tractor AT-300, AT-301, AT-302 and 2 more. Effective May 8, 2008 - [AD 2005-13-12](https://openairdocs.org/ad/2005-13-12): Front and rear spar of the horizontal stabilizer · Air Tractor AT-300, AT-301, AT-302 and 11 more. Effective Aug 5, 2005 - [AD 2000-11-05](https://openairdocs.org/ad/2000-11-05): Vertical Fin Front Spar · Air Tractor AT-301, AT-401 and AT-501. Effective Jun 23, 2000 - [AD 98-25-01](https://openairdocs.org/ad/98-25-01): Flap Actuator Overtravel Stop · Air Tractor AT-300, AT-301, AT-302 and 13 more. Effective Jan 19, 1999 - [AD 97-14-05](https://openairdocs.org/ad/97-14-05): Fin Front Spar Attachment Fittings · Air Tractor AT-301, AT-302, AT-400 and 5 more. Effective Aug 25, 1997 - [AD 96-24-08](https://openairdocs.org/ad/96-24-08): Parking Brake Valve · Air Tractor AT-250, AT-300, AT-301 and 7 more. Effective Dec 23, 1996 - [AD 92-07-14](https://openairdocs.org/ad/92-07-14): Wing Structure · Air Tractor AT-300, AT-301, AT-302 and 2 more. Effective May 8, 1992 - [AD 83-18-01](https://openairdocs.org/ad/83-18-01): Fuselage Attach Fittings · Air Tractor AT-300, AT-301 and AT-302. Effective Sep 6, 1983 - [AD 82-06-12](https://openairdocs.org/ad/82-06-12): Main Landing Gear Struts · Air Tractor AT-300, AT-301, AT-302 and 2 more. Effective Mar 25, 1982 ### Matched by engine (Amateur-built UNKNOWN ENG) None in force. ### Historical (superseded or no longer in force) - [AD 2008-11-17](https://openairdocs.org/ad/2008-11-17) (historical): Overturn skid plate in the cockpit area · Air Tractor AT-250, AT-300, AT-301 and 14 more. Effective Jul 7, 2008 - [AD 2003-06-01](https://openairdocs.org/ad/2003-06-01) (historical): Wing centerline splice joint · Air Tractor AT-300, AT-301, AT-302 and 2 more. Effective Apr 4, 2003 - [AD 2002-25-09](https://openairdocs.org/ad/2002-25-09) (historical): Overturn skid plate · Air Tractor AT-250, AT-300, AT-301 and 10 more. Effective Feb 10, 2003 - [AD 96-23-19](https://openairdocs.org/ad/96-23-19) (historical): Flap Actuator Overtravel Stop · Air Tractor AT-300, AT-301, AT-302 and 13 more. Effective Dec 18, 1996 ## Information bulletins (advisory) (4 in force) - [SAIB CE-16-27](https://openairdocs.org/saib/CE-16-27): Flight Controls, Trailing Edge (TE) Flap Control System. Issued Oct 31, 2016 - [SAIB CE-11-41](https://openairdocs.org/saib/CE-11-41): Fuselage, Wing Attach Fittings. Issued Jun 29, 2011 - [SAIB CE-11-30](https://openairdocs.org/saib/CE-11-30): Aircraft Structures. Issued May 9, 2011 - [SAIB CE-04-23](https://openairdocs.org/saib/CE-04-23): . Issued Dec 2, 2003 ## NTSB investigations None matched to N105DA. ## NTSB investigations on N105DA not matched to an aircraft (1) 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 FTW97IA144](https://openairdocs.org/ntsb/FTW97IA144), Mar 27, 1997: Boeing 767-232 (N105DA), Dfw Airport, TX, incident, minor damage. Probable cause: The manufacturer's improper installation of the flap, which resulted in fatigue cracking of the flap attach bolts and separation of the flap. ## FAA accident and incident reports None matched to N105DA. ## Reports on N105DA not matched to an aircraft (3) They name N105DA, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft. - [Incident 19970824031979I](https://openairdocs.org/incident/19970824031979I), Aug 24, 1997: Boeing 767 (N105DA), Salt Lake City, UT, Minor damage. (-23) No narrative available. - [Incident 19970327007469I](https://openairdocs.org/incident/19970327007469I), Mar 27, 1997: Boeing 767232 (N105DA), Dallas-Ft Worth, TX, Minor damage. Narrative: on approach to dfw airport, as the aircraft descended through 11,000 feet and flaps were extended to 15 degrees, the flight crew felt and heard a… - [Incident 19910718034899I](https://openairdocs.org/incident/19910718034899I), Jul 18, 1991: Boeing 767232 (N105DA), Covington - Cin, OH. Flap warning annunication on takeoff power and flaps set. Returned to gate. Found a NR7 proximity box faulty. ## 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. ## Service difficulty reports on N105DA not matched to an aircraft (25) They name N105DA, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft. - [SDR DALA1214310105](https://openairdocs.org/sdr/DALA1214310105), Mar 5, 2012: BATTERY PACK. DISCHARGED. EMERGENCY LIGHTS IN F/C ARE INOPERATIVE. MAINTENANCE REPLACED THE BATTERY PACK AND RECONNECTED THE CONNECTOR. SYSTEM OPERATION IS NORMAL. - [SDR DL767040384](https://openairdocs.org/sdr/DL767040384), Apr 27, 2004: STRUCTURE. CORRODED. RIGHT I/B FLAP ATTACH BOLTS HOLES CORRODED. REPAIRED PER ERA 089397-14MA REF NRC402 404 400 403 399 401. - [SDR DL767030701](https://openairdocs.org/sdr/DL767030701), Jul 29, 2003: ACTUATOR. BROKEN. DURING A LUBE VISIT (1T188), AN AMT FOUND THE LOWER ICE SCRAPER RING FROM THE STAB TRIM ACTUATOR BALL NUT BENT AND OUT OF PLACE. IT WAS FOUND AT THE BOTTOM OF T - [SDR DL767030285](https://openairdocs.org/sdr/DL767030285), Mar 27, 2003: WEDGE. DEBONDED. RIGHT WING SLAT T/E WEDGE DISBONDED. REPAIRED PER ER/A 422819-14. - [SDR DL767021071](https://openairdocs.org/sdr/DL767021071), Sep 12, 2002: FLASHLIGHT. INOPERATIVE. FOUND ON TRANSIT CHECK 2R DOOR FLT ATTENDANT EMERGENCY FLASHLIGHT INOP. REPLACED SAME. - [SDR DL767020849](https://openairdocs.org/sdr/DL767020849), Jul 20, 2002: MODULE. FAULTY. ABORTED TAKEOFF IN BOS FOR SPOILERS WARNING. RECYCLED SPEED BRAKE HANDLE PER BOS MTC. THROTTLED UP ON TAXIWAY WITH NO WARNING LIGHT. ATTEMPTED ANOTHER TAKEOFF. - [SDR DL767011844](https://openairdocs.org/sdr/DL767011844), Nov 22, 2001: SOCKET. DEFECTIVE. LEFT OFFWING SLIDE LIGHT INOP. REPLACED LIGHT SOCKET, OPS CHECK GOOD. - [SDR DL767011519](https://openairdocs.org/sdr/DL767011519), Sep 9, 2001: BULKHEAD. CRACKED. FUSELAGE / BULKHEAD / FS 1809.5 / RH / OUTER FWD CHORD : CRACK REPAIR INSPECTION OF THE FS 1809.5 BULKHEAD PER AD 2001-09-13 REVEALED A CRACK IN THE RH FWD OUTE - [SDR DL767011407](https://openairdocs.org/sdr/DL767011407), Aug 25, 2001: LIGHT. INOPERATIVE. ON L/O FOUND EMERGENCY LIGHTS INOP AT RT OVERWING EXIT SIGN, 2L DOOR EXIT SIGN AND AFT RT LAV RED FLOOR LIGHT. RELAMPED RT OVERWING EXIT AND 2L DOOR EXIT. REPAI - [SDR DL767001797](https://openairdocs.org/sdr/DL767001797), Sep 15, 2000: FITTING. TOOL DAMAGE. TOOLING DAMAGE OCCURRED IN THE LT AND RT WING O/B PITCH LOAD FITTINGS. THE DAMAGE WAS LOCATED ON THE THIRD FROM BOTTOM HOLE ON THE VERTICAL LEGS OF THE BACK-UP - [SDR DL767001798](https://openairdocs.org/sdr/DL767001798), Sep 13, 2000: BULKHEAD. DAMAGED. FOUR HOLES FOUND ELONGATED IN THE AFT BULKHEAD OF BOTH PYLONS. ON THE NR 1 PYLON I/B FLANGE, THE UPPER HOLE, THE SECOND FROM THE TOP, AND THE 5TH GSE FASTENER H - [SDR DL767001726](https://openairdocs.org/sdr/DL767001726), Sep 8, 2000: SKIN. WORN. PERFORMED SRM REPAIR 53-80-01-2-203. REF NR 336. REPAIR OF DAMAGE ON FUSELAGE SKIN ABOVE RT HORIZ STAB AT STA 1809.5. - [SDR DL767001664](https://openairdocs.org/sdr/DL767001664), Aug 28, 2000: CONTROL CABLE. FRAYED. FOUND RUDDER CABLES RA-4 AND RB-4 FRAYED AT AFT RUDDER QUADRANT AT CENTERING MECHANISM. REPLACED CABLES. - [SDR DL767992006](https://openairdocs.org/sdr/DL767992006), Sep 8, 1999: SKIN. CRACKED. FUSELAGE SKIN FS 1270 STRINGER 38R, CRACK REPAIR. DURING REPETITIVE HFEC INSPECTION OF AN EXISTING DENT AT FS 1270, NEAR STRINGER 38R, A CRACK WAS FOUND. THE CR - [SDR DL767992005](https://openairdocs.org/sdr/DL767992005), Sep 8, 1999: SKIN. CRACKED. FUSELAGE SKIN FS 1255-1270, STRINGER 38L-39L, CRACK REPAIR. WHILE ACCOMPLISHING REPETITIVE HFEC INSPECTION OF EXISTING SKIN DENTS BETWEEN FS 1255 AND 1260 AND B - [SDR DL767990625](https://openairdocs.org/sdr/DL767990625), Mar 20, 1999: WEDGE. DELAMINATED. THE TRAILING EDGE WEDGE OF THE NR 9 SLAT WAS FOUND WITH A 4 X 4 AREA OF DELAMINATION. THE DAMAGE AREA WAS CUT OUT AND REPAIRED PER THE B767 SRM 57-43-02. THE RE - [SDR DL767990466](https://openairdocs.org/sdr/DL767990466), Mar 4, 1999: BATTERY. DISCHARGED. EMERGENCY LIGHTS INOP LT AFT CEILING AND LT AFT SERVICE DOOR. REPLACED BATTERY PACK, OPS NORMAL. - [SDR DL767981800](https://openairdocs.org/sdr/DL767981800), Aug 30, 1998: RVDT. INTERMITTANT. AFTER TAKEOFF, L/E CAUTION AND L/E SLAT ASSY EICAS MSG. RETURNED TO LAX. REPLACED M548 RVDT PER MM, ALL OPS NORMAL. - [SDR DL767972491](https://openairdocs.org/sdr/DL767972491), Nov 28, 1997: BULB. MISSING. EMERGENCY TRACK LIGHT BULB AND LENS MISSING AT ROW 34B. INSTALLED BULB, LENS, AND O-RING AT EMERGENCY LIGHT 34B. - [SDR DL767971116](https://openairdocs.org/sdr/DL767971116), Jun 10, 1997: LIGHT. MISSING. IRREG: 3RD WHITE EEPLS LGT MISSING F/C LT SIDE. REPLACED LGT MODULE, CKS GOOD. - [SDR DL767970467](https://openairdocs.org/sdr/DL767970467), Mar 9, 1997: SKIN. CORRODED. THE FUSELAGE SKIN AND STRINGERS WERE FOUND CORRODED BETWEEN STA 1540 AND STA 1562, LOCATED BETWEEN STR 39R AND STR 39L. THE FUSELAGE SKIN IS CORRODED NEAR AN EX - [SDR DL767962733](https://openairdocs.org/sdr/DL767962733), Dec 18, 1996: HYD FILTER. CRACKED. ON TAXI OUT, LOSS OF CENTER HYDR QTY WENT TO ZERO AND SYS PRESS LIGHT CAME ON. FOUND C-SYS HYD MODULE AFT BLEW ELEMENT CASE CAUSING HYD FAILURE OF C-SYS. REPLAC - [SDR DL767961119](https://openairdocs.org/sdr/DL767961119), May 10, 1996: TRACK LIGHTS. DAMAGED. EMERGENGY FLOOR TRACK DAMAGED IN SEVERAL AREAS OF CABIN, AT SEATS 28FG, 30FG AND 13FG. REPLACED FLOOR TRACK AT SEATS 28FG, 30FG AND 13FG, TESTS GOOD. - [SDR DL767950665](https://openairdocs.org/sdr/DL767950665), Feb 16, 1995: SKIN. LIGHTNING STRIKE. DURING LETTER CHECK, FOUND LIGHTNING STRIKES TOP OF FUSELAGE LOCATED FWD AND AFT OF PRODUCTION SPLICE FWD OF VERTICAL STABLIZER 3 FWD AND 3 AFT, BURNISHED OUT A - [SDR DL767950664](https://openairdocs.org/sdr/DL767950664), Feb 16, 1995: DOOR. DAMAGED. DURING LETTER CHECK INSP, FOUND FWD CARGO DOOR HAS TWO AREAS OF DAMAGE ON SUPPORT STRUCTURE FOR LOWER HOOKS MARKED BETWEEN FWD AND MID HOOK AND BETWEEN MID AND ## STCs that may be installed (OpenAirDocs) (71, 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 (Air Tractor AT-301) - [STC SA01800SE](https://openairdocs.org/stc/SA01800SE): Fabrication and installation of new or replacement of existing instrument panel lights dimmer control. TCW Technologies, LLC - [STC SA01861SE](https://openairdocs.org/stc/SA01861SE): Fabrication and installation of Landing Light Controller. TCW Technologies, 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 SA7965SW](https://openairdocs.org/stc/SA7965SW): Application of fabric and polyurethane finishing system. Shady Aviation LLC - [STC SA01240SE](https://openairdocs.org/stc/SA01240SE): Installation of secondary voltage indication system. Visual Instruments LLC - [STC SA4503NM](https://openairdocs.org/stc/SA4503NM): Remove original cloth covering and install Ceconite covering. Ceconite Division of Poly-Fiber Inc - [STC SA02266SE](https://openairdocs.org/stc/SA02266SE): Installation of a Lever Throttle Quadrant. Kawak Aviation Technologies Inc - [STC SA04776NY](https://openairdocs.org/stc/SA04776NY): The HIPEC Covering and Finishing System must be performed and maintained. HIPEC Aircraft Coatings Inc - [STC SA03819NY](https://openairdocs.org/stc/SA03819NY): Installation and maintenance of Oratex 6000 Covering and Coating System. Lanitz-Prena Folien Factory GmbH - [STC SA1151NW](https://openairdocs.org/stc/SA1151NW): Installation of the Flight Grip Model 135 Control Stick Grip. Air Products & Parts LLC - [STC SA00401BO](https://openairdocs.org/stc/SA00401BO): Installation of a SkyTrax100B UAT receiver. Avidyne Corporation - [STC SA00888SE](https://openairdocs.org/stc/SA00888SE): Option 1: Install Walter M601-E11S engine and a Hartzell HC-B3TW-3/T10282N+4 propeller or a Walter M601-E11 engine and an Avia V508-E-AG 106/A propeller per the Master Drawing List and Installation Instructions given in Approved Model List SA00888SE. (Note: Prior to July 17, 2002, the model M601-E11S engine was designated as the model M601-E11 engine). Option 2: Install a Walter M601-D11 engine and Avia V508-E-AG 106/A propeller per Cascade Flying Service Master Drawing List CFS-MDL-0001 Rev G, dated June 15, 2004, and Cascade Flying Service Document CFS-IM-107, Rev A, dated July 29, 2003, “Installation Instructions for Walter Turbine Installation on Air Tractor 300 & 400 Series Ag Aircraft,” or later FAA-approved revisions to these documents. NOTE: The Air Tractor model AT-400, AT-402B, AT-502, AT-502B, and AT-503A airplanes are not eligible for modification under option 2. Cascade Flying Service LLC - [STC SA02268CH](https://openairdocs.org/stc/SA02268CH): Installation of Airwolf Filter Corp. Air Oil Separator. Airwolf Filter Corporation - [STC SA5190NM](https://openairdocs.org/stc/SA5190NM): Installation of Gustin Aviation chip detector light system. A & L Aircraft Parts Inc - [STC SA04165NY](https://openairdocs.org/stc/SA04165NY): Installation of Latitude Technologies Skynode S200 Satcom system must be performed. Latitude Technologies Corporation - [STC SA01435SE](https://openairdocs.org/stc/SA01435SE): Installation of J.P. Instruments (JPI) Primary Engine Data Management System. J. P. Instruments - [STC SA722GL](https://openairdocs.org/stc/SA722GL): Installation of Model 200 scavenge oil filter system in Air Tractor AT-301 aircraft with Pratt & Whitney R-1340 engine. Airwolf Filter Corp - [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 SA02205SE](https://openairdocs.org/stc/SA02205SE): Installation of a replacement airframe fuel pump in accordance with Cascade Flying Service Master Drawing List FW-CFS545-90, Rev. B, dated October 19, 2011, or later FAA approved revision. Cascade Aircraft conversions LLC - [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 SA01745WI](https://openairdocs.org/stc/SA01745WI): Installation of a Cable Cutter System on the Main Landing Gear. Hershey Flying Service Inc - [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 SA02276AK](https://openairdocs.org/stc/SA02276AK): Installation of AMSAFE Aviation Inflatable Restraints. AMSAFE Inc - [STC SA00478CH](https://openairdocs.org/stc/SA00478CH): Installation of Cooper Superflite 102 Fabric. Aviation Products Systems Inc - [STC SA00489LA](https://openairdocs.org/stc/SA00489LA): Installation of winglets. Aero Spraying Service Inc - [STC SA02283SE PAGE 1](https://openairdocs.org/stc/SA02283SE%20PAGE%201): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P. Electronics International Inc - [STC ST03554CH](https://openairdocs.org/stc/ST03554CH): Installation of Rotary Gatekeeper and provisions equipment. Turbine Conversions Ltd - [STC SA02402SE PAGE 1](https://openairdocs.org/stc/SA02402SE%20PAGE%201): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) CGR-30C. Electronics International Inc - [STC SA00403SE](https://openairdocs.org/stc/SA00403SE): Installation of Vortex Generators on the wings. Micro AeroDynamics 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 SA01583CH](https://openairdocs.org/stc/SA01583CH): Installation of a Trace Engines, LP OE600A model engine, McCauley 3FF34C529/106AW[X]-0 model propeller and associated systems. Trace Engines LP - [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 SA4294SW](https://openairdocs.org/stc/SA4294SW): Installation of freon air conditioning unit (wind-driven compressor). Collins Aircraft Dynamics Inc - [STC SA00770CH](https://openairdocs.org/stc/SA00770CH): Replace front 30 inches of fiberglass canopy top with L.P. Aero Plastics Inc. acrylic top in accordance with Reabe Aircraft Improvement Inc. Installation Instructions as listed on AML No. SA00770CH, amended January 14, 2011, or later FAA approved revisions. Reabe Aircraft Improvement Inc - [STC SA00068SE](https://openairdocs.org/stc/SA00068SE): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1). Electronics International Inc - [STC SA02110CH](https://openairdocs.org/stc/SA02110CH): Installation of a Time Trac Data Recorder. P2 Incorporated - [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc - [STC SA01988SE](https://openairdocs.org/stc/SA01988SE): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) MVP-50P. Electronics International Inc - [STC SA02033AT](https://openairdocs.org/stc/SA02033AT): Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line. M-20 Oil Separators LLC - [STC SA2385NM](https://openairdocs.org/stc/SA2385NM): Installation of Pacific Propeller Inc 22D40/AG200-2 and 12D40/AG100-2 propellers, governors, and associated systems. Pacific Propeller International LLC - [STC SA2505NM](https://openairdocs.org/stc/SA2505NM): Installation of Pheromone aerial application system. (AT-400A RESTRICTED CATEGORY). Herculite Products 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 SA943NW](https://openairdocs.org/stc/SA943NW): Installation of Pacific Propellers EAC-12D40-425/AG-100-4S or EAC-22D40/AG-200-4S propeller assemblies using P&W 600 hp R-1340-S1H series engines. Pacific Propeller International LLC - [STC SA8075SW](https://openairdocs.org/stc/SA8075SW): Installation of fiberglass covering. (M-62 SERIES PT-19) (G-73 SCHWEIZER). Razorback Fabrics Inc - [STC SA4137NM](https://openairdocs.org/stc/SA4137NM): Installation of a Model 6 Automatic Flagman dispensor system on the upper surface of the right wing root. Automatic Flagman Company - [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 SA01295LA](https://openairdocs.org/stc/SA01295LA): Installation of modified Pratt & Whitney R-1340 engine. This mod must be done concurrently with STC SE01200LA which modifies R-1340 engine. Aircraft Cylinder & Turbine Inc - [STC SA1008WE](https://openairdocs.org/stc/SA1008WE): Installation of Poly-Fiber covering material. Poly-Fiber Inc - [STC SA190CH](https://openairdocs.org/stc/SA190CH): Installation of Goodyear 29X11-10, 8 ply or 10 ply tires and 8.50X10 tubes. Reabe Aircraft Improvement Inc All 71: https://openairdocs.org/aircraft/N105DA/stcs.md ## Related - Other Air Tractor AT-301 aircraft: https://openairdocs.org/model/air-tractor-at-301/aircraft.md - The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md --- 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.