# N23LL: 1975 Smith AEROSTAR 601

- Status: Valid registration
- Airframe: [Smith AEROSTAR 601](https://openairdocs.org/model/smith-aerostar-601) (registry code 8360606, 6 seats)
- Engine: [Lycoming TI0-540 series](https://openairdocs.org/engine/lycoming-ti0-540-series) (registry code 41533)
- Data sheets: [TCDS E14EA](https://openairdocs.org/tcds/E14EA) (Lycoming Engines) (OpenAirDocs)
- Serial number: 61-0252-100
- Year built: 1975
- Type: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: September 15, 1975
- Certificate issued: June 30, 2025
- Expires: June 30, 2032
- Mode S code: A2072C
- Registered owner: [Ajca Farms LLC](https://openairdocs.org/faa-owner/AJCA%20FARMS%20LLC)
- Location: [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell)
- Owner type: LLC
- Owner's area on the map: 48.2306° N, 114.4033° W: Placed by OpenAirDocs at the center of ZIP code 59901, within about 12 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=23LL
- Page: https://openairdocs.org/aircraft/N23LL

From the FAA registry file of October 22, 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 Lycoming TI0-540 model are included.

## ADs that may apply (OpenAirDocs): 47 in force

### Matched by airframe (Smith AEROSTAR 601)

None in force.

### Matched by engine (Lycoming TI0-540 series)

- [AD 2026-04-11](https://openairdocs.org/ad/2026-04-11): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 605 more. Effective Apr 8, 2026
- [AD 2023-09-09](https://openairdocs.org/ad/2023-09-09): Exhaust Turbine System (Recip) · Aerostar PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P) and 292 more. Effective Jul 17, 2023
- [AD 2022-16-03](https://openairdocs.org/ad/2022-16-03): Engine (RECIPROCATING) · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-F and 236 more. Effective Aug 15, 2022
- [AD 2017-16-11](https://openairdocs.org/ad/2017-16-11): Reciprocating Engine Power Section · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-360-B1G6 and 93 more. Effective Aug 15, 2017
- [AD 2017-11-10](https://openairdocs.org/ad/2017-11-10): Engine Exhaust System · Lycoming Engines TIO-540-AJ1A. Effective Jun 28, 2017
- [AD 2015-19-07](https://openairdocs.org/ad/2015-19-07): Fuel injector fuel lines · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 187 more. Effective Nov 3, 2015
- [AD 2015-10-06](https://openairdocs.org/ad/2015-10-06): Engine exhaust pipes · Lycoming Engines TIO-540-AJ1A. Effective Jul 2, 2015
- [AD 2013-21-02](https://openairdocs.org/ad/2013-21-02): Turbochargers · Continental Motors LTSIO-360-RB, TSIO-360-MB, TSIO-360-RB and 2 more. Effective Nov 13, 2013
- [AD 2012-19-01](https://openairdocs.org/ad/2012-19-01): Crankshafts · Lycoming Engines AEIO-360-A1A, AEIO-360-A1B, AEIO-360-A1B6 and 321 more. Effective Oct 24, 2012
- [AD 71-13-01 R1](https://openairdocs.org/ad/71-13-01-R1): Rescinding an airworthiness directive · Lycoming Engines TIO-540-A1A, TIO-540-A1B, TIO-540-A1C and 13 more. Effective Mar 8, 2012
- [AD 2012-03-06](https://openairdocs.org/ad/2012-03-06): Fuel servo diaphragm · Continental Motors 6-260-A, 6-285-A, 6-285-B and 482 more. Effective Feb 24, 2012
- [AD 2011-13-03](https://openairdocs.org/ad/2011-13-03): Turbocharger Turbine · Lycoming Engines LTO-360-E1A6D, O-540-L3C5D, TIGO-541-E1A and 20 more. Effective Jul 13, 2011
- [AD 2010-07-08](https://openairdocs.org/ad/2010-07-08): Turbochargers · Kelly Aerospace Energy Systems HIO-360-E1AD, HIO-360-E1BD, HIO-360-F1AD and 137 more. Effective Apr 19, 2010
- [AD 2009-26-12](https://openairdocs.org/ad/2009-26-12): Cylinder assemblies · Engine Components Reciprocating Engine Cylinder Assemblies, AEIO-320-D1B, AEIO-320-D2B and 264 more. Effective Feb 4, 2010
- [AD 2009-02-03](https://openairdocs.org/ad/2009-02-03): Fuel injection servos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 261 more. Effective Feb 9, 2009
- [AD 2008-08-17](https://openairdocs.org/ad/2008-08-17): Turbocharger turbine housing flange and the exhaust tube flange · Teledyne Continental Motors TSIOL-550-A 'Liquid-Cooled' engines (RAM Aircraft Limited Partnership STC SA7633SW or SA7633SW-D). Effective May 6, 2008
- [AD 2006-12-07](https://openairdocs.org/ad/2006-12-07): ECi cylinder assemblies · Aerostar AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 386 more. Effective Jul 11, 2006
- [AD 2006-10-21](https://openairdocs.org/ad/2006-10-21): ECi connecting rods · Engine Components Reciprocating Engine Connecting Rods, AEIO-360-B1B, AEIO-360-B1D and 171 more. Effective Jun 22, 2006
- [AD 2005-19-11](https://openairdocs.org/ad/2005-19-11): Crankshafts · Lycoming Engines AEIO-360-A1B6, AEIO-360-A1E6, AEIO-540-D4A5 and 59 more. Effective Oct 21, 2005
- [AD 2005-12-06](https://openairdocs.org/ad/2005-12-06): Riveted-impulse coupling assemblies and snap-ring coupling assemblies · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 154 more. Effective Jul 19, 2005
- [AD 2004-10-14](https://openairdocs.org/ad/2004-10-14): Crankshaft gear · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 642 more. Effective Jun 25, 2004
- [AD 2004-05-24](https://openairdocs.org/ad/2004-05-24): Zinc-plated Crankshaft Gear Retaining Bolts · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 161 more. Effective Mar 30, 2004
- [AD 2003-14-03](https://openairdocs.org/ad/2003-14-03): Rotary fuel pumps · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 262 more. Effective Aug 14, 2003
- [AD 2002-19-03](https://openairdocs.org/ad/2002-19-03): Crankshaft · Lycoming Engines IO-540-A1A5, IO-540-AA1A5, IO-540-AA1B5 and 81 more. Effective Sep 20, 2002
- [AD 2002-12-07](https://openairdocs.org/ad/2002-12-07): Oil Filter Converter Plate Gasket or the Converter Plate Kit · Lycoming Engines HIO-360-E1AD, HIO-360-E1BD, HIO-360-F1AD and 95 more. Effective Jul 3, 2002
- [AD 98-17-11](https://openairdocs.org/ad/98-17-11): Crankshafts · Continental Motors A-65-3, A-65-8, A75-8 and 90 more. Effective Oct 19, 1998
- [AD 97-15-11](https://openairdocs.org/ad/97-15-11): Cylinder kits · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 538 more. Effective Aug 12, 1997
- [AD 97-01-04](https://openairdocs.org/ad/97-01-04): Cylinder assemblies · Lycoming Engines IO-540-M1B5D, LTIO-540-F2BD, LTIO-540-J2B and 10 more. Effective Apr 22, 1997
- [AD 91-21-01 R1](https://openairdocs.org/ad/91-21-01-R1): Exhaust System Flanges · Lycoming Engines TIO-540-S1AD. Effective Jun 27, 1996
- [AD 95-26-02](https://openairdocs.org/ad/95-26-02): Aviation Gasoline · Lycoming Engines IO-320-B1A, IO-320-B1B, IO-320-B1C and 182 more. Effective Jan 24, 1996
- [AD 95-07-01](https://openairdocs.org/ad/95-07-01): Connecting Rod Bolt · Lycoming Engines AEIO-360-A1E, AEIO-360-B1G6, AEIO-360-H1A and 177 more. Effective Apr 12, 1995
- [AD 92-12-05](https://openairdocs.org/ad/92-12-05): Piston Pins · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 532 more. Effective Jul 10, 1992
- [AD 91-10-04](https://openairdocs.org/ad/91-10-04): Exhaust Transition Flange Bolts · Lycoming Engines TIO-540-AE2A. Effective May 21, 1991
- [AD 91-08-07](https://openairdocs.org/ad/91-08-07): Fuel Pump · Lycoming Engines TIO-360-A1A, TIO-360-A1B, TIO-360-A3B6 and 51 more. Effective May 6, 1991
- [AD 89-15-10](https://openairdocs.org/ad/89-15-10): Nozzle Vent Manifold · Lycoming Engines TIO-540-AE2A. Effective Nov 30, 1989
- [AD 87-10-06 R1](https://openairdocs.org/ad/87-10-06-R1): Rocker Arm Assembly · Lycoming Engines IO-360-B4, IVO-360-A1A, O-340-A1A and 243 more. Effective Sep 1, 1989
- [AD 84-19-03 R1](https://openairdocs.org/ad/84-19-03-R1): Cylinder Assemblies · Lycoming Engines LTIO-540-V2AD and TIO-540-V2AD. Effective Sep 20, 1984
- [AD 83-22-04](https://openairdocs.org/ad/83-22-04): Injector Fuel Diaphragm Stem · Lycoming Engines AEIO-540-L1B5D, IO-540-AA1A5, IO-540-G1B5 and 30 more. Effective Nov 4, 1983
- [AD 81-12-06 R1](https://openairdocs.org/ad/81-12-06-R1): Magnetos · Bendix Magnetos, LTIO-540-J2BD and TIO-540-J2BD. Effective Nov 12, 1981
- [AD 80-17-10](https://openairdocs.org/ad/80-17-10): Transition Wastegate Assembly · Lycoming Engines TIO-540-S1AD. Effective Aug 18, 1980
- [AD 79-04-05](https://openairdocs.org/ad/79-04-05): Regulator Diaphragm Stem Assembly · Lycoming Engines AEIO-320-D1B, AEIO-320-E1A, AEIO-320-E1B and 215 more. Effective Sep 26, 1979
- [AD 79-12-07](https://openairdocs.org/ad/79-12-07): Magnetos · Bendix Magnetos, TIO-540-F2BD, TIO-540-N2BD and 3 more. Effective Jun 19, 1979
- [AD 78-23-10](https://openairdocs.org/ad/78-23-10): Center Body Bellows Seal Assembly · Lycoming Engines AEIO-320-D1B, AEIO-320-E1A, AEIO-320-E1B and 218 more. Effective Nov 7, 1978
- [AD 73-23-01](https://openairdocs.org/ad/73-23-01): Piston Pin Assembly · Lycoming Engines AIO-360-A1A, AIO-360-A1B, AIO-360-A2A and 215 more. Effective Jan 13, 1977
- [AD 75-09-15](https://openairdocs.org/ad/75-09-15): Fuel Starvation To The Engine · Lycoming Engines AIO-320-A1A, AIO-320-A1B, AIO-320-A2A and 130 more. Effective Apr 30, 1975
- [AD 73-10-02](https://openairdocs.org/ad/73-10-02): Bendix Fuel Injectors · Bendix Fuel Injectors, AIO-320-A1A, AIO-320-A1B and 88 more. Effective May 16, 1973
- [AD 66-06-03](https://openairdocs.org/ad/66-06-03): Connecting Rod Assemblies · Lycoming Engines GO-435-C2 (O-435-17), GO-435-C2A, GO-435-C2A2 and 317 more. Effective Jan 16, 1969

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

- [AD 2024-21-02](https://openairdocs.org/ad/2024-21-02) (historical): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 548 more. Effective Dec 5, 2024
- [AD 2012-24-09](https://openairdocs.org/ad/2012-24-09) (historical): Turbocharger turbine wheel · Continental Motors TSIO-360-MB, TSIO-360-RB, TSIO-360-SB and 1 more. Effective Dec 20, 2012
- [AD 2011-26-04](https://openairdocs.org/ad/2011-26-04) (historical): Externally mounted fuel injector fuel lines · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 186 more. Effective Jan 25, 2012
- [AD 2011-15-10](https://openairdocs.org/ad/2011-15-10) (historical): Fuel servos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 256 more. Effective Aug 16, 2011
- [AD 2008-19-05](https://openairdocs.org/ad/2008-19-05) (historical): Parallel Valve'' reciprocating engines · Engine Components Reciprocating Engine Cylinder Assemblies, AEIO-320-D1B, AEIO-320-D2B and 262 more. Effective Oct 20, 2008
- [AD 2008-14-07](https://openairdocs.org/ad/2008-14-07) (historical): Externally mounted fuel injector fuel lines · Textron Lycoming, AVCO AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 185 more. Effective Aug 14, 2008
- [AD 2008-08-14](https://openairdocs.org/ad/2008-08-14) (historical): Fuel injection servo plugs · Superior Air Parts AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 242 more. Effective Apr 29, 2008
- [AD 2008-06-51](https://openairdocs.org/ad/2008-06-51) (historical): Fuel injection servo plugs · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 235 more
- [AD 2006-20-09](https://openairdocs.org/ad/2006-20-09) (historical): Certain crankshafts replacing · Lycoming Engines AEIO-360-A1B6, AEIO-360-A1E6, AEIO-540-D4A5 and 82 more. Effective Nov 3, 2006
- [AD 2005-26-10](https://openairdocs.org/ad/2005-26-10) (historical): ECi cylinder assemblies. · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 413 more. Effective Jan 31, 2006
- [AD 2002-26-01](https://openairdocs.org/ad/2002-26-01) (historical): Fuel injector fuel lines · Textron Lycoming, AVCO IGO-480-A1B6, IGO-540-B1A, IGO-540-B1C and 178 more. Effective Jan 31, 2003
- [AD 2002-23-06](https://openairdocs.org/ad/2002-23-06) (historical): Crankshaft gear retaining bolts · Textron Lycoming, AVCO AEIO-540, AEIO-540-D4A5, AEIO-540-D4B5 and 46 more. Effective Nov 19, 2002
- [AD 2002-20-51](https://openairdocs.org/ad/2002-20-51) (historical): Crankshaft gear retaining bolts · Textron Lycoming, AVCO AEIO-540, IO-540 Series (all), LTIO-540-F2BD and 39 more
- [AD 2002-17-53](https://openairdocs.org/ad/2002-17-53) (historical): Crankshaft · Lycoming Engines LTIO-540-F2BD, LTIO-540-J2B, LTIO-540-J2BD and 36 more
- [AD 2002-04-51](https://openairdocs.org/ad/2002-04-51) (historical): Crankshaft · Lycoming Engines LTIO-540-F2BD, LTIO-540-J2B, LTIO-540-J2BD and 8 more
- [AD 98-18-12](https://openairdocs.org/ad/98-18-12) (historical): Fuel Pump · Textron Lycoming, AVCO AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 249 more. Effective Sep 28, 1998
- [AD 93-05-22](https://openairdocs.org/ad/93-05-22) (historical): Fuel Injector Fuel Lines · Lycoming Engines TIO-540-S1AD. Effective May 11, 1993
- [AD 92-12-10](https://openairdocs.org/ad/92-12-10) (historical): Lycoming Engines TIO-540-S1AD. Effective Jun 5, 1992
- [AD 71-13-01](https://openairdocs.org/ad/71-13-01) (historical): Fuel Injector Manifold To Nozzle Tube Assemblies · Lycoming Engines TIO-540-A1A, TIO-540-A1B, TIO-540-A1C and 3 more. Effective Jun 22, 1971

## Information bulletins (advisory) (9 in force)

- [SAIB NE-19-08](https://openairdocs.org/saib/NE-19-08): Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders. Issued May 2, 2019
- [SAIB NE-08-32R1](https://openairdocs.org/saib/NE-08-32R1): Propeller Governor  Idler Gear Shaft Set Screw. Issued May 13, 2016
- [SAIB NE-14-13](https://openairdocs.org/saib/NE-14-13): Reciprocating Engine - Cylinder Mounting Studs. Issued Mar 24, 2014
- [SAIB NE-08-26R3](https://openairdocs.org/saib/NE-08-26R3): Magneto/Distributor. Issued Mar 31, 2011
- [SAIB NE-09-04](https://openairdocs.org/saib/NE-09-04): Fuel Control/Reciprocating Engines. Issued Jan 10, 2009
- [SAIB NE-06-32R1](https://openairdocs.org/saib/NE-06-32R1): Reciprocating Engine - Crankshaft. Issued Sep 10, 2008
- [SAIB NE-03-18](https://openairdocs.org/saib/NE-03-18): . Issued Jan 22, 2003
- [SAIB NE-03-12](https://openairdocs.org/saib/NE-03-12): . Issued Dec 30, 2002
- [SAIB NE-01-37](https://openairdocs.org/saib/NE-01-37): . Issued Aug 16, 2001
- [SAIB NE-08-26R1](https://openairdocs.org/saib/NE-08-26R1) (historical): Dual Magnetos. Issued Jul 8, 2008
- [SAIB NE-08-32](https://openairdocs.org/saib/NE-08-32) (historical): Propeller Governor Set Screw. Issued Jul 3, 2008

## 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 LAX05LA089](https://openairdocs.org/ntsb/LAX05LA089), Feb 5, 2005: Smith Aerostar 601 (N23LL), Murrieta, CA, substantial damage. Probable cause: The pilot's misjudgment of distance/altitude on final approach, which resulted in an undershoot of the runway.

## 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 20050204004059A](https://openairdocs.org/incident/20050204004059A), Feb 4, 2005: Piper PA60601 (N23LL), Murrieta/Temecu, CA, Substantial damage. (-23) The pilot [privacy data omitted] and his wife [privacy data omitted] departed chino airport chino, CA on February 4, 2005 with an intended destination of…

## 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) (39)

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 (Lycoming TI0-540 series)

- [STC SE00825WI](https://openairdocs.org/stc/SE00825WI): Installation of Specialty Products Spin-on oil filter on Lycoming Engines. B & C Specialty Products Inc. Lists TIO-540-A1A
- [STC SE04349CH](https://openairdocs.org/stc/SE04349CH): Installation of SureFly electronic ignition. SureFly Partners Ltd. Lists TIO-540-A1A
- [STC SE01954SE](https://openairdocs.org/stc/SE01954SE): Installation of engine crankcase seal. Ly-Con Rebuilding Company. Lists TIO-540-A1A
- [STC SE02352CH](https://openairdocs.org/stc/SE02352CH): Installation of Challenger cleanable oil filter assembly. Challenger Aviation Products Inc. Lists TIO-540-A1A
- [STC SE00939WI](https://openairdocs.org/stc/SE00939WI): Installation of B&C Specialty Products Model BC 315-( ) Starter on Lycoming engines. B & C Specialty Products Inc. Lists TIO-540-A1A
- [STC SE2667CE](https://openairdocs.org/stc/SE2667CE): Installation of B&C Specialty Products lightweight (10.2 pounds) engine starter PN BC315-100-2(12 volt) or PN BC315-100-4 (24 volt). B & C Specialty Products Inc. Lists TIO-540-A1A
- [STC SE03309CH](https://openairdocs.org/stc/SE03309CH): Installation of Engine Preheat Kit, p/n TSP6CYL-2927-115 for 115 volt application. Hartzell Propeller Inc. Lists TIO-540-A1A
- [STC SE01436LA](https://openairdocs.org/stc/SE01436LA): Installation of Firewall Forward Technologies LLC modified camshaft. Centri-lube Technologies LLC. Lists TIO-540-A1A
- [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp. Lists TIO-540-A1A
- [STC SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc. Lists TIO-540-A1A
- [STC SE8628SW](https://openairdocs.org/stc/SE8628SW): Installation of oil nozzles for lubrication of cam and filters. Cygnet Aerospace Corp. Lists TIO-540-A1A
- [STC SE04445AT](https://openairdocs.org/stc/SE04445AT): Installation of Continental Motors, Inc. (CMI) S-1200 Series Magnetos (10-349290-1 and 10-349310-1) and associated hardware. Continental Motors Inc. Lists TIO-540-AE2A
- [STC SE09445SC](https://openairdocs.org/stc/SE09445SC): Installation of fuel injector nozzles. General Aviation Modifications Inc
- [STC SE7503SW](https://openairdocs.org/stc/SE7503SW): Installation of any or all parts listed on Airmotive Engineering Drawing List No. 852-1, Rev. 1, dated 10/4/88, or later FAA approved revision. Continental Motors, Inc
- [STC SE7668SW](https://openairdocs.org/stc/SE7668SW): Installation of parts listed on Drawing List 8810-3, Rev 6. Continental Motors, Inc
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc
- [STC SE00226NY](https://openairdocs.org/stc/SE00226NY): Replacement of Lycoming starter with SKY-TEC 24-volt starter Models 149-24HT and 122-24HT. Approval limited to 24-volt DC source available to the starter. Hartzell Engine Technologies, LLC. Lists TIO-540-A1A
- [STC SE3329NM](https://openairdocs.org/stc/SE3329NM): Lycoming valve cover gasket. Real Gaskets Tennessee. Lists TIO-540-A1A
- [STC SE01211SE](https://openairdocs.org/stc/SE01211SE): Installation of the Merlyn Products Inc. turbocharger system. Merlyn Products Inc. Lists TIO-540-AE2A
- [STC SE2569NM](https://openairdocs.org/stc/SE2569NM): Relocation of Turbocharger, intercooler, fuel control unit, and upper engine mounts plus associated changes. Javelin Conversions Inc. Lists TIO-540-V2AD
- [STC SE02436AT](https://openairdocs.org/stc/SE02436AT): Installation of 200F series fuel pump assembly. Kelly Aerospace Energy Systems LLC. Lists TIO-540-A1A
- [STC SE02555AT](https://openairdocs.org/stc/SE02555AT): Consolidated Fuel Systems 201F series fuel pump assembly on various Textron Lycoming engine models. Kelly Aerospace Energy Systems LLC. Lists TIO-540-A2B
- [STC SE8193SW](https://openairdocs.org/stc/SE8193SW): Grind nitriden high compression cylinder barrles to plus .010 oversize and install SL75089 P10 piston, SL74242 P10 compression ring, and SL73857 P10 oil ring. Superior Air Parts Inc. Lists TIO-540-G1A
- [STC SE445GL](https://openairdocs.org/stc/SE445GL): Incorporation of a fuel flow transducer. Shadin Avionics. Lists TIO-540-A1A
- [STC SE01930NY](https://openairdocs.org/stc/SE01930NY): Installation of Casper Labs 90 degree oil filter housing adapter. Casper Labs Inc. Lists TIO-540-A1A
- [STC SE1779NM](https://openairdocs.org/stc/SE1779NM): Installation of Precise Flight, Inc. Standby Vacuum System SVS III. Precise Flight Inc. Lists TIO-540-A1A
- [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation. Lists TIO-540-A1A
- [STC SE3177NM](https://openairdocs.org/stc/SE3177NM): Installation of Machin, Inc. intercooler & associated systems. American Aviation Inc. Lists TIO-540-A1A
- [STC SE978NW](https://openairdocs.org/stc/SE978NW): Installation of a Garrett AiResearch Model T18A21 or T18A95 turbocharger with Machen Inc intercooler and associated systems. Machen Inc. Lists TIO-540-J2BD
- [STC SE09492SC](https://openairdocs.org/stc/SE09492SC): Installation and usage of Exxon 20W50 multigrade aircraft engine oil conforming to Exxon Oil formulation WS-3013. Exxon Company USA
- [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation. Lists TIO-540-A1A
- [STC SE7674SW](https://openairdocs.org/stc/SE7674SW): Grind nitrided cylinder barrels plus .010 over size pistons, to .010 and install SL10545P10 SL74241P10 compression rings and SL73857P10 Oil Control rings. Superior Air Parts, Inc. Lists TIO-540-A1A
- [STC SE8023SW](https://openairdocs.org/stc/SE8023SW): Installation and usage of AEROSHELL. Shell Development Co
- [STC SE3762NM](https://openairdocs.org/stc/SE3762NM): Installation of modified oil filter adapter. Enhance, Inc. Lists TIO-540-J2BD
- [STC SE5879SW](https://openairdocs.org/stc/SE5879SW): Use of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP. Phillips Petroleum Co
- [STC SE244NE](https://openairdocs.org/stc/SE244NE): Installation of Mattituck plasma flame sprayed cylinder barrels in Teledyne reciprocating engines. Mattituck Airbase, Inc
- [STC SE80NE](https://openairdocs.org/stc/SE80NE): Installation and usage of Bel-Ray synthetic aviation oil, Bel-Ray Aero 1, (nonsupercharged), horizontally opposed direct drive, aircraft engines of 350 hp. or less. Bel-Ray Company, Inc
- [STC SE128NE](https://openairdocs.org/stc/SE128NE): Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines. AMS/OIL
- [STC SA01436DE](https://openairdocs.org/stc/SA01436DE) (historical): Installation of Firewall Forward Technologies, LLC modified camshaft. Centri-Lube Technologies LLC. Lists TIO-540-A1A

## Related

- Other Smith AEROSTAR 601 aircraft: https://openairdocs.org/model/smith-aerostar-601/aircraft.md
- The Lycoming TI0-540 series engine: https://openairdocs.org/engine/lycoming-ti0-540-series.md

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