# N40173: 1980 Ayres S2R-T11 - Status: Valid registration - Airframe: [Ayres S2R-T11](https://openairdocs.org/model/ayres-s2r-t11) (registry code 0970107, 1 seats) - Engine: [Pratt & Whitney Canada PT6A-60A](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-60a) (registry code 52043) - Data sheets: [TCDS E4EA](https://openairdocs.org/tcds/E4EA) (Pratt & Whitney Canada Corp.) (OpenAirDocs) - Serial number: T11-002 - Year built: 1980 - Type: Fixed wing single engine - Engine type: Turbo-prop - Airworthiness: Restricted, agriculture and pest control - Airworthiness date: February 1, 1980 - Certificate issued: August 8, 1998 - Expires: January 31, 2028 - Mode S code: A4B3C1 - Registered owner: [Tri County Sprayers Inc](https://openairdocs.org/faa-owner/TRI%20COUNTY%20SPRAYERS%20INC) - Location: [Hamlin, TX](https://openairdocs.org/faa-place/TX/Hamlin) - Owner type: Corporation - Owner's area on the map: 32.8770° N, 100.1278° W: Placed by OpenAirDocs at the center of ZIP code 79520, within about 9 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=40173 - Page: https://openairdocs.org/aircraft/N40173 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): 2 in force ### Matched by airframe (Ayres S2R-T11) None in force. ### Matched by engine (Pratt & Whitney Canada PT6A-60A) - [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 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 Effective Mar 14, 1997 ### Historical (superseded or no longer in force) - [AD 97-17-03](https://openairdocs.org/ad/97-17-03) (historical): Lower Spar Cap Bolt Hole Areas · Ayres 600 S-2D, S-2R, S2R-G1 and 12 more. Effective Sep 5, 1997 - [AD 97-13-11](https://openairdocs.org/ad/97-13-11) (historical): Lower Spar Cap Bolt Hole Areas · Ayres 600-S-2C, S-2R, S2R-G1 and 12 more. Effective Jul 23, 1997 ## Information bulletins (advisory) (3 in force) - [SAIB ACE-98-17](https://openairdocs.org/saib/ACE-98-17): . Issued Dec 16, 1997 - [SAIB NE-15-21](https://openairdocs.org/saib/NE-15-21): Fuel Injector Nozzle. Issued Aug 19, 2015 - [SAIB CE-03-24](https://openairdocs.org/saib/CE-03-24): . Issued Feb 19, 2003 ## NTSB investigations (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 FTW01LA207](https://openairdocs.org/ntsb/FTW01LA207), Sep 19, 2001: Ayres S2R-T11 (N40173), Spur, TX, substantial damage. Probable cause: the loss of engine power while in cruise flight for undetermined reasons. A contributing factor was the lack of suitable terrain for the forced landing. ## 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 20010919023909A](https://openairdocs.org/incident/20010919023909A), Sep 19, 2001: N40173, Spur, TX, No damage. (-23) The pilot reported that he had departed hamlin, TX (14F) enroute to crosbyton, TX (8F3) at approximately 0900 CDT in an ayers aircraft, model S2R,… ## 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) (6) 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 engine (Pratt & Whitney Canada PT6A-60A) - [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 - [STC SE00014EN](https://openairdocs.org/stc/SE00014EN): Installation of the Pratt & Whitney Engine Services, Inc. CrossCheck Engine Monitor Kit P/N HUMS-K-071-1, Rev. A on the specified PT6A engine models and kit P/N HUMS-K-071-2 on the specified A250 engine models. Pratt & Whitney Engine Services Inc - [STC SE00020EN](https://openairdocs.org/stc/SE00020EN): Installation of the Pratt & Whitney Engine Services, Inc. TrendCheck/ TrendCheck Plus Engine Monitor Kit P/N TREND-K-010-1. Pratt & Whitney Engine Services Inc - [STC SE01805NY](https://openairdocs.org/stc/SE01805NY): Installation of Fuel Nozzle Adapters using studs and nuts. Atlantic Turbines International Inc - [STC SE09257SC](https://openairdocs.org/stc/SE09257SC): Convert P&W Engine Models PT6A-15AG, -27, and -28, into PT6A-34 configuration. Covington Aircraft Engines, Inc - [STC SE659NE](https://openairdocs.org/stc/SE659NE): Installation of oil tank filler neck check valve, P/N TSA-76A. Aviation Components Support ## Related - Other Ayres S2R-T11 aircraft: https://openairdocs.org/model/ayres-s2r-t11/aircraft.md - The Pratt & Whitney Canada PT6A-60A engine: https://openairdocs.org/engine/pratt-whitney-canada-pt6a-60a.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.