# N175SW: 1985 Fairchild SA227-AC

- Status: Valid registration
- Airframe: [Fairchild SA227-AC](https://openairdocs.org/model/fairchild-sa227-ac) (registry code 3377509, 12 seats)
- Engine: [Honeywell TPE331-SER series](https://openairdocs.org/engine/honeywell-tpe331-ser-series) (registry code 33909)
- Data sheets: [TCDS A8SW](https://openairdocs.org/tcds/A8SW) (Ontic Engineering and Manufacturing Inc.) (OpenAirDocs)
- Serial number: AC 621-B
- Year built: 1985
- Type: Fixed wing multi engine
- Engine type: Turbo-prop
- Airworthiness: Standard, normal
- Airworthiness date: December 15, 2005
- Certificate issued: March 22, 2021
- Expires: March 31, 2028
- Mode S code: A12D65
- Registered owner: [Denaina Air Taxi LLC](https://openairdocs.org/faa-owner/DENAINA%20AIR%20TAXI%20LLC)
- Location: [Anchorage, AK](https://openairdocs.org/faa-place/AK/Anchorage)
- Owner type: LLC
- Owner's area on the map: 61.2181° N, 149.9003° W: Placed by OpenAirDocs: center of Anchorage, AK, within about 23 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=175SW
- Page: https://openairdocs.org/aircraft/N175SW

From the FAA registry file of October 20, 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 Honeywell TPE331-SER model are included.

## ADs that may apply (OpenAirDocs): 93 in force

### Matched by airframe (Fairchild SA227-AC)

- [AD 2017-07-01](https://openairdocs.org/ad/2017-07-01): Propellers/Propulsors · M7 Aerospace SA226-AT, SA226-T, SA226-T(B) and 7 more. Effective May 5, 2017
- [AD 2016-25-12](https://openairdocs.org/ad/2016-25-12): Horizontal Stabilizer Structure · M7 Aerospace SA226-AT, SA226-T, SA226-T(B) and 7 more. Effective Jan 12, 2017
- [AD 2016-15-02](https://openairdocs.org/ad/2016-15-02): Flight Controls · M7 Aerospace SA226-AT, SA226-T, SA226-T(B) and 9 more. Effective Aug 26, 2016
- [AD 2016-10-01](https://openairdocs.org/ad/2016-10-01): Elevator Control System · M7 Aerospace SA226-AT, SA226-T, SA226-T(B) and 7 more. Effective Jun 15, 2016
- [AD 2015-19-10](https://openairdocs.org/ad/2015-19-10): Flight Controls · M7 Aerospace SA226-AT, SA226-T, SA226-T(B) and 9 more. Effective Nov 3, 2015
- [AD 2014-15-01](https://openairdocs.org/ad/2014-15-01): Fuselage Main, Structure · M7 Aerospace SA227-AC (C-26A), SA227-AT, SA227-BC (C-26A) and 2 more. Effective Aug 27, 2014
- [AD 2014-09-02](https://openairdocs.org/ad/2014-09-02): Flight Controls · M7 Aerospace SA226-AT, SA226-T, SA226-T(B) and 9 more. Effective Jun 5, 2014
- [AD 2014-06-01](https://openairdocs.org/ad/2014-06-01): Fuselage Main, Bulkhead · M7 Aerospace SA226-AT, SA226-T, SA226-T(B) and 9 more. Effective Apr 25, 2014
- [AD 2012-18-01](https://openairdocs.org/ad/2012-18-01): Wing, Fuselage Attach Fitting · M7 Aerospace SA226-AT, SA226-T, SA226-T(B) and 7 more. Effective Sep 21, 2012
- [AD 2011-02-04](https://openairdocs.org/ad/2011-02-04): Flight Compartment Windows · M7 Aerospace SA226-AT, SA226-T, SA226-T(B) and 9 more. Effective Jan 24, 2011
- [AD 2009-11-06](https://openairdocs.org/ad/2009-11-06): Hydraulic tube assemblies · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 5 more. Effective Jul 2, 2009
- [AD 2007-16-03](https://openairdocs.org/ad/2007-16-03): Pitch trim actuators · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 8 more. Effective Sep 7, 2007
- [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 2005-06-13](https://openairdocs.org/ad/2005-06-13): Wing spar center web cutout · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 7 more. Effective May 2, 2005
- [AD 2005-01-19](https://openairdocs.org/ad/2005-01-19): Mode S transponders · GARMIN International GTX 330D, GTX 330, GTX 33D and 830 more. Effective Feb 23, 2005
- [AD 2003-19-10](https://openairdocs.org/ad/2003-19-10): Fuel boost pump · M7 Aerospace SA226-AT, SA226-T, SA226-T(B) and 8 more. Effective Nov 7, 2003
- [AD 2002-08-02](https://openairdocs.org/ad/2002-08-02): Brake Shuttle Valves · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 4 more. Effective Jun 6, 2002
- [AD 2002-08-01](https://openairdocs.org/ad/2002-08-01): Brake Master Cylinders · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 4 more. Effective Jun 6, 2002
- [AD 2002-01-16](https://openairdocs.org/ad/2002-01-16): Dual Engine Flameout · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 5 more. Effective Mar 11, 2002
- [AD 2000-17-01](https://openairdocs.org/ad/2000-17-01): Brake System · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 4 more. Effective Oct 6, 2000
- [AD 2000-17-11](https://openairdocs.org/ad/2000-17-11): Main Landing Gear (MLG) Assemblies · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 4 more. Effective Sep 22, 2000
- [AD 2000-06-04](https://openairdocs.org/ad/2000-06-04): Pneumatic Deicing Boots · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 8 more. Effective May 5, 2000
- [AD 98-08-20](https://openairdocs.org/ad/98-08-20): Autopilot Servo Actuators · Alliedsignal Avionics Autopilot Servo Actuators, Mystere-Falcon 20 - C5, Mystere-Falcon 20 - D5 and 17 more. Effective Jun 2, 1998
- [AD 98-06-25](https://openairdocs.org/ad/98-06-25): Cargo Door Lower Belt Frames · M7 Aerospace SA226-AT, SA226-TC, SA227-AC (C-26A) and 1 more. Effective Apr 27, 1998
- [AD 97-11-13](https://openairdocs.org/ad/97-11-13): Generator Fault Transformer Wiring · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 4 more. Effective Jul 11, 1997
- [AD 97-10-13](https://openairdocs.org/ad/97-10-13): Elevator Torque Tube Arm · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 5 more. Effective Jul 8, 1997
- [AD 97-01-12](https://openairdocs.org/ad/97-01-12): Ground Proximity Warning System · Airtell International Ground Proximity Warning System, Mystere-Falcon 200, EMB-110P1 and 20 more. Effective Feb 25, 1997
- [AD 96-20-08](https://openairdocs.org/ad/96-20-08): Replace Side Cockpit Window · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 7 more. Effective Nov 14, 1996
- [AD 96-19-05](https://openairdocs.org/ad/96-19-05): Main Landing Gear or Nose Landing Gear Assemblies or Yokes · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 7 more. Effective Oct 1, 1996
- [AD 96-09-16](https://openairdocs.org/ad/96-09-16): Airplane Flight Manual (AFM) - Icing · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 7 more. Effective Jun 11, 1996
- [AD 95-17-09 R1](https://openairdocs.org/ad/95-17-09-R1): Essential Bus Current Limiters · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 7 more. Effective May 13, 1996
- [AD 94-07-10 R1](https://openairdocs.org/ad/94-07-10-R1): Upper Wing Skin Inspection · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 7 more. Effective Mar 25, 1996
- [AD 96-03-03](https://openairdocs.org/ad/96-03-03): Power Control Cable Safety Wire Nuts · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 7 more. Effective Mar 15, 1996
- [AD 95-24-11](https://openairdocs.org/ad/95-24-11): Foreign Object Damage Barriers In Floorboards · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 7 more. Effective Jan 3, 1996
- [AD 95-01-07](https://openairdocs.org/ad/95-01-07): Lower Wing Skin Panels · M7 Aerospace SA227-AC (C-26A) and SA227-AT. Effective Feb 17, 1995
- [AD 93-15-01](https://openairdocs.org/ad/93-15-01): Horizontal Stabilizer Pivot Fitting Fasteners · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 5 more. Effective Sep 16, 1993
- [AD 93-09-05](https://openairdocs.org/ad/93-09-05): Elevator Return Spring · M7 Aerospace SA226-AT, SA226-TC, SA227-AC (C-26A) and 1 more. Effective Jun 18, 1993
- [AD 93-07-12](https://openairdocs.org/ad/93-07-12): Horizontal Stabilizer Rear Spar Inspection · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 4 more. Effective May 28, 1993
- [AD 93-08-09](https://openairdocs.org/ad/93-08-09): Airplane Flight Manual (AFM) Change - Nose Wheel · M7 Aerospace SA227-AC (C-26A), SA227-AT, SA227-BC (C-26A) and 2 more. Effective May 14, 1993
- [AD 92-19-08](https://openairdocs.org/ad/92-19-08): Rudder Pedal Link Attachment · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 4 more. Effective Oct 16, 1992
- [AD 92-18-07](https://openairdocs.org/ad/92-18-07): Power Lever Detent Arms · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 5 more. Effective Oct 2, 1992
- [AD 90-14-01](https://openairdocs.org/ad/90-14-01): Passenger Seat · M7 Aerospace SA226-AT, SA226-TC, SA227-AC (C-26A) and 1 more. Effective Feb 11, 1991
- [AD 90-24-03](https://openairdocs.org/ad/90-24-03): Rudder Trim Link Assemblies · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 10 more. Effective Jan 25, 1991
- [AD 85-22-06 R1](https://openairdocs.org/ad/85-22-06-R1): Stall Avoidance System (SAS) · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 4 more. Effective Oct 19, 1990
- [AD 90-03-19 R1](https://openairdocs.org/ad/90-03-19-R1): Electrical System · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 4 more. Effective Aug 15, 1990
- [AD 90-05-06 R1](https://openairdocs.org/ad/90-05-06-R1): Main Landing Gear Doors · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 4 more. Effective Aug 13, 1990
- [AD 87-02-02](https://openairdocs.org/ad/87-02-02): Primary Control Cables · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 4 more. Effective Jan 27, 1987
- [AD 86-10-08](https://openairdocs.org/ad/86-10-08): Elevator Gust Lock System · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 4 more. Effective May 28, 1986
- [AD 84-13-01](https://openairdocs.org/ad/84-13-01): Generator Control J-Box · M7 Aerospace SA226-TC, SA227-AC (C-26A), SA227-AT and 1 more. Effective Jul 5, 1984
- [AD 83-15-09](https://openairdocs.org/ad/83-15-09): Nose Wheel Steering System Modification · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 4 more. Effective Sep 8, 1983

### Matched by engine (Honeywell TPE331-SER series)

- [AD 2018-22-01](https://openairdocs.org/ad/2018-22-01): Turbine Section · Honeywell International TPE331-10, TPE331-10N, TPE331-10R and 8 more. Effective Dec 10, 2018
- [AD 2018-17-15](https://openairdocs.org/ad/2018-17-15): Turbine Engine Combustion Section · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 39 more. Effective Oct 22, 2018
- [AD 2018-13-05](https://openairdocs.org/ad/2018-13-05): Turbine Engine Reduction Gear · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 18 more. Effective Jul 26, 2018
- [AD 2016-21-07](https://openairdocs.org/ad/2016-21-07): Fuel control drive · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 26 more. Effective Nov 28, 2016
- [AD 2016-18-17](https://openairdocs.org/ad/2016-18-17): Compressor impeller · Honeywell International TPE331-10, TPE331-10AV, TPE331-10GP and 22 more. Effective Nov 4, 2016
- [AD 2015-18-03](https://openairdocs.org/ad/2015-18-03): Engine propeller shaft coupling failures · Honeywell International TPE331-10, TPE331-10R, TPE331-10U and 8 more. Effective Nov 13, 2015
- [AD 2012-02-06](https://openairdocs.org/ad/2012-02-06): First stage turbine disks · Honeywell International TPE331-10, TPE331-10AV, TPE331-10GP and 12 more. Effective Mar 15, 2012
- [AD 2011-18-51 R1](https://openairdocs.org/ad/2011-18-51-R1): Main shaft bearing · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 82 more. Effective Oct 19, 2011
- [AD 2009-17-05](https://openairdocs.org/ad/2009-17-05): First stage turbine disks · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 20 more. Effective Sep 1, 2009
- [AD 2006-14-03](https://openairdocs.org/ad/2006-14-03): New flight cycle counting method for first, second, and third-stage turbine rotors · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 48 more. Effective Aug 9, 2006
- [AD 2004-09-29](https://openairdocs.org/ad/2004-09-29): First Stage Turbine Disks · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 20 more. Effective Jun 15, 2004
- [AD 2002-25-02](https://openairdocs.org/ad/2002-25-02): First stage compressors implellers · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 35 more. Effective Jan 21, 2003
- [AD 2002-21-15](https://openairdocs.org/ad/2002-21-15): Second stage turbine stator inner seal support · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 9 more. Effective Nov 26, 2002
- [AD 2002-12-09](https://openairdocs.org/ad/2002-12-09): Spectrometric Oil Analysis Program (SOAP) Sampling of Oil and Filter, Gearbox Components · Honeywell International TPE331-11U, TPE331-12B, TPE331-12JR and 3 more. Effective Jul 3, 2002
- [AD 2001-21-02](https://openairdocs.org/ad/2001-21-02): Airplane Flight Manual--Electronic Engine Controls · Honeywell International TPE331-10N, TPE331-12B and TPE331-8. Effective Nov 19, 2001
- [AD 98-12-09](https://openairdocs.org/ad/98-12-09): Fuel Manifold · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 29 more. Effective Aug 7, 1998
- [AD 98-04-15](https://openairdocs.org/ad/98-04-15): Turbine Stators · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 9 more. Effective Apr 27, 1998
- [AD 97-15-10](https://openairdocs.org/ad/97-15-10): Engine Inlet Ice Protection · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 39 more. Effective Sep 22, 1997
- [AD 96-06-11](https://openairdocs.org/ad/96-06-11): Engine Compressor Components · Honeywell International TPE331-14A, TPE331-14B, TPE331-14F and 1 more. Effective May 28, 1996
- [AD 95-16-08](https://openairdocs.org/ad/95-16-08): Life Limited Turbine Components · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 62 more. Effective Sep 5, 1995
- [AD 94-26-07](https://openairdocs.org/ad/94-26-07): Fuel Control Governor Drive · Honeywell International TPE331-10, TPE331-10A, TPE331-10B and 32 more. Effective Apr 18, 1995
- [AD 94-09-08](https://openairdocs.org/ad/94-09-08): Third Stage Stator Turbine Assemblies · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 7 more. Effective May 20, 1994
- [AD 93-15-11](https://openairdocs.org/ad/93-15-11): Propeller Pitch Control (PPC) Gasket · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 58 more. Effective Sep 7, 1993
- [AD 92-26-08](https://openairdocs.org/ad/92-26-08): Third Stage Stator Assemblies · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 7 more. Effective Jul 15, 1993
- [AD 93-05-09](https://openairdocs.org/ad/93-05-09): Third Stage Turbine Stator Assemblies · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 9 more. Effective Jun 28, 1993
- [AD 93-02-01](https://openairdocs.org/ad/93-02-01): Stratoflex Fuel Manifold Assemblies · Honeywell International TPE331-10, TPE331-10A, TPE331-10B and 21 more. Effective Mar 18, 1993
- [AD 89-07-07 R1](https://openairdocs.org/ad/89-07-07-R1): Oil Scavenge Pump Assembly · Honeywell International TPE331-1, TPE331-10, TPE331-10R and 26 more. Effective Oct 30, 1989
- [AD 86-08-06 R1](https://openairdocs.org/ad/86-08-06-R1): Second Stage Turbine Rotor Assembly · Honeywell International TPE331-25AA, TPE331-25AB, TPE331-25DA and 7 more. Effective Dec 21, 1987
- [AD 84-10-06 R1](https://openairdocs.org/ad/84-10-06-R1): Fuel Pump Assemblies · Honeywell International TPE331-1, TPE331-10, TPE331-10B and 45 more. Effective Dec 26, 1984
- [AD 84-01-04](https://openairdocs.org/ad/84-01-04): Third Stage Turbine Wheels · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 11 more. Effective Jan 25, 1984
- [AD 73-26-07 R3](https://openairdocs.org/ad/73-26-07-R3): Fuel Pump Shaft Internal Drive Splines · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 39 more. Effective Jul 31, 1980
- [AD 78-25-08 R3](https://openairdocs.org/ad/78-25-08-R3): Turbine Rotor · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 11 more. Effective Jun 12, 1980
- [AD 79-12-04](https://openairdocs.org/ad/79-12-04): Forged Third Stage Turbine Wheel Blade · Honeywell International TPE331-10. Effective May 10, 1979
- [AD 78-05-02](https://openairdocs.org/ad/78-05-02): Propeller Pitch Control Cam Follower Pin · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 11 more. Effective Apr 5, 1979
- [AD 76-16-01](https://openairdocs.org/ad/76-16-01): Bearing Oil Transfer Tube · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 11 more. Effective Aug 6, 1976
- [AD 75-10-05](https://openairdocs.org/ad/75-10-05): Torque Sensor Assembly Mounting Arm · Honeywell International TPE331-1, TPE331-2, TPE331-3U and 3 more. Effective Jul 11, 1975
- [AD 74-10-10](https://openairdocs.org/ad/74-10-10): Fuel Control Assembly Support Bracket · Honeywell International TPE331-1, TPE331-2, TPE331-3U and 2 more. Effective Jul 11, 1975
- [AD 74-24-05](https://openairdocs.org/ad/74-24-05): Propeller Pitch Control Sleeve Assembly · Honeywell International TPE331-3U, TPE331-3UW, TPE331-5 and 1 more. Effective Nov 26, 1974
- [AD 70-19-02](https://openairdocs.org/ad/70-19-02): High Speed Pinion Bearings · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 3 more. Effective Feb 20, 1974
- [AD 71-05-07](https://openairdocs.org/ad/71-05-07): High Speed Pinion Assembly · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 30 more. Effective Apr 8, 1972
- [AD 70-16-09](https://openairdocs.org/ad/70-16-09): High Speed Pinion Assembly · Honeywell International TPE331-3W
- [AD 70-04-04](https://openairdocs.org/ad/70-04-04): High Speed Pinion Retaining Nut · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 3 more

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

- [AD 2008-12-16](https://openairdocs.org/ad/2008-12-16) (historical): Left-hand (LH) and right-hand (RH) inboard wing leading edge/battery box areas · M7 Aerospace LP SA226-AT, SA226-T, SA226-TC and 4 more. Effective Jul 23, 2008
- [AD 2001-20-14](https://openairdocs.org/ad/2001-20-14) (historical): Brake Shuttle Valves · M7 Aerospace LP SA226-AT, SA226-T, SA226-TC and 4 more. Effective Nov 21, 2001
- [AD 2000-03-17](https://openairdocs.org/ad/2000-03-17) (historical): Pitch Trim Actuator · M7 Aerospace LP SA226-AT, SA226-T, SA226-TC and 8 more. Effective Apr 10, 2000
- [AD 98-19-15 R1](https://openairdocs.org/ad/98-19-15-R1) (historical): Pitch Trim Actuator · M7 Aerospace LP SA226-AT, SA226-T, SA226-TC and 7 more. Effective Mar 3, 2000
- [AD 99-06-02](https://openairdocs.org/ad/99-06-02) (historical): Wing Spar Center Web · M7 Aerospace LP SA226-AT, SA226-T, SA226-TC and 7 more. Effective Apr 16, 1999
- [AD 98-19-15](https://openairdocs.org/ad/98-19-15) (historical): Pitch Trim Actuator · M7 Aerospace LP SA226-AT, SA226-T, SA226-TC and 7 more. Effective Sep 25, 1998
- [AD 97-23-01](https://openairdocs.org/ad/97-23-01) (historical): Pitch Trim Actuator · M7 Aerospace LP SA226-AT, SA226-T, SA226-TC and 8 more. Effective Dec 1, 1997
- [AD 97-02-02](https://openairdocs.org/ad/97-02-02) (historical): Control Column Pitch Bearing Attaching Nuts · M7 Aerospace SA226-AT, SA226-T, SA226-TC and 9 more. Effective Feb 6, 1997
- [AD 93-15-02 R2](https://openairdocs.org/ad/93-15-02-R2) (historical): Pitch Trim Actuator · M7 Aerospace LP SA226-AT, SA226-T, SA226-TC and 8 more. Effective Jul 25, 1996
- [AD 94-07-10](https://openairdocs.org/ad/94-07-10) (historical): Upper Wing Skin Inspection · M7 Aerospace LP SA226-AT, SA226-T, SA226-TC and 7 more. Effective May 27, 1994
- [AD 92-01-02](https://openairdocs.org/ad/92-01-02) (historical): Parking Brake System · M7 Aerospace LP SA226-AT, SA226-T, SA226-TC and 4 more. Effective Jan 16, 1992
- [AD 86-25-04](https://openairdocs.org/ad/86-25-04) (historical): POH/AFM Appendix - Icing · M7 Aerospace LP SA227-AC (C-26A), SA227-AT, SA227-BC (C-26A) and 4 more. Effective Dec 15, 1986
- [AD 2018-02-14](https://openairdocs.org/ad/2018-02-14) (historical): Turbine Engine Combustion Section · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 38 more. Effective Feb 28, 2018
- [AD 2015-12-04](https://openairdocs.org/ad/2015-12-04) (historical): Fuel control unit (FCU) · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 26 more. Effective Jul 22, 2015
- [AD 2011-18-51](https://openairdocs.org/ad/2011-18-51) (historical): Main shaft bearing · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 82 more
- [AD 2006-15-08](https://openairdocs.org/ad/2006-15-08) (historical): Woodward fuel control unit (FCU) assemblies · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 26 more. Effective Aug 24, 2006
- [AD 88-12-10](https://openairdocs.org/ad/88-12-10) (historical): Turbine Rotor · Honeywell International TPE331-10, TPE331-10R, TPE331-10U and 6 more. Effective Jun 6, 1988
- [AD 92-02-19 PL](https://openairdocs.org/ad/92-02-19-PL) (historical): Fuel Manifold Assembly Leak · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 29 more
- [AD 91-04-02](https://openairdocs.org/ad/91-04-02) (historical): Third stage stator assembly · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 7 more
- [AD 90-21-01](https://openairdocs.org/ad/90-21-01) (historical): Third stage stator assembly · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 7 more

All 113: https://openairdocs.org/aircraft/N175SW/ads.md

## Information bulletins (advisory) (18 in force)

- [SAIB 2026-15](https://openairdocs.org/saib/2026-15): Forward Pressure Bulkhead. Issued Sep 9, 2026
- [SAIB 2026-14](https://openairdocs.org/saib/2026-14): Rudder Control System, Brake. Issued Aug 25, 2026
- [SAIB CE-20-09](https://openairdocs.org/saib/CE-20-09): Nacelle/Pylon, Frame/Spar/Rib. Issued May 13, 2020
- [SAIB CE-18-11](https://openairdocs.org/saib/CE-18-11): Flight Controls, Elevator Control System. Issued Feb 9, 2018
- [SAIB CE-17-04](https://openairdocs.org/saib/CE-17-04): Landing Gear, Main Landing Gear. Issued Dec 16, 2016
- [SAIB CE-16-06](https://openairdocs.org/saib/CE-16-06): Flight Controls, Rudder Control System. Issued Nov 20, 2015
- [SAIB CE-16-04](https://openairdocs.org/saib/CE-16-04): Engine Controls, Power Lever. Issued Nov 2, 2015
- [SAIB CE-15-09](https://openairdocs.org/saib/CE-15-09): Windows; Flight Compartment Windows. Issued Feb 24, 2015
- [SAIB CE-15-05R1](https://openairdocs.org/saib/CE-15-05R1): Flight Controls, Aileron Control System. Issued Nov 26, 2014
- [SAIB CE-13-42](https://openairdocs.org/saib/CE-13-42): Wings, Ailerons. Issued Aug 1, 2013
- [SAIB CE-13-41](https://openairdocs.org/saib/CE-13-41): Landing Gear, Landing Gear Actuator. Issued Jul 23, 2013
- [SAIB CE-13-10](https://openairdocs.org/saib/CE-13-10): Windshield/Door Rain/Ice Removal. Issued Dec 21, 2012
- [SAIB CE-12-08](https://openairdocs.org/saib/CE-12-08): Flight Controls, Elevator Control System. Issued Nov 8, 2011
- [SAIB CE-11-26](https://openairdocs.org/saib/CE-11-26): Wings: Wing Skin. Issued Mar 30, 2011
- [SAIB NE-16-19](https://openairdocs.org/saib/NE-16-19): Turbine Engine Compressor Section  Stator Nozzle Distress. Issued Jul 22, 2016
- [SAIB NE-16-18](https://openairdocs.org/saib/NE-16-18): Power Lever  Loss of Power Control. Issued Jul 11, 2016
- [SAIB NE-06-70](https://openairdocs.org/saib/NE-06-70): . Issued Sep 25, 2006
- [SAIB NE-06-69](https://openairdocs.org/saib/NE-06-69): . Issued Sep 20, 2006
- [SAIB CE-15-05](https://openairdocs.org/saib/CE-15-05) (historical): Flight Controls, Aileron Control System. Issued Nov 25, 2014

## NTSB investigations

None matched to N175SW.

## FAA accident and incident reports

None matched to N175SW.

## Service difficulty reports (18)

As reported by operators and repair stations.

- [SDR 2024FA0000372](https://openairdocs.org/sdr/2024FA0000372), Apr 21, 2024: BEARING. FAILED. TORQUE SENSOR BEARING FAILED (PN: 3103585AL-1, SN: TA43-0510123, TSN: 2,125.4). SPECTROMETRIC OIL ANALYSIS PROGRAM RESULT REPORT DISCOVERED M50 PLATELETS, SHINY
- [SDR OWFR2018071200216](https://openairdocs.org/sdr/OWFR2018071200216), Feb 28, 2018: SPAR. CRACKED. CRACKED AILERON SPAR AT BOTTOM OF CENTER HINGE BRACKET. DISCREPANCY OCCURRED UNDER NORMAL WEAR AND UTILIZATION. RECOMMEND CLOSE EXAMINATION OF THIS AREA AND THE
- [SDR HKGA20171127007](https://openairdocs.org/sdr/HKGA20171127007), Nov 22, 2017: TAB. CRACKED. DURING INSPECTION THE RT AILERON TRIM TAB HINGE SUPPORT ANGLE WAS FOUND TO BE CRACKED. REMOVED AND REPLACED THE RT AILERON AND TRIM TAB IAW MM.
- [SDR HKGA20170207002](https://openairdocs.org/sdr/HKGA20170207002), Feb 7, 2017: SKIN. CORRODED. DURING A ROUTINE INSPECTION, CORROSION WAS LOCATED ON THE RT WING LOWER SKIN JUST AFT OF THE REAR SPAR WS 236.1, IN THE AILERON WING COVE. THE CORROSION WAS REM
- [SDR HKGA20160118001](https://openairdocs.org/sdr/HKGA20160118001), Jan 18, 2016: RIB. CRACKED. WHILE PERFORMING A FUEL LEAK REPAIR, TWO CRACKS WERE NOTICED ON A LT WING RIB, AT WS 131.889. CRACKED RIB REPAIRED IAW LAR 16-BRY-006 REVISION A, BY CUTTING OUT
- [SDR HKGA20141113001](https://openairdocs.org/sdr/HKGA20141113001), Oct 31, 2014: ANGLE. CRACKED. A CRACK WAS FOUND IN THE RT BATTERY BOX LOWER ANGLE DURING THE ABCD INSPECTION. FABRICATED A DOUBLER, FILLERS & ANGLE FOR REPAIR. ALL WORK WAS PERFORMED IAW SA2
- [SDR 2013F00005](https://openairdocs.org/sdr/2013F00005), Jan 2, 2013: ATTACH BRACKET. CRACKED. WHILE PERFOMING AD 2012-18-01, FOUND A CRACK ON THE LT FWD ATTACH FITTING BRACKET - CRACK LENGTH .5"
- [SDR HKGR175SW6211](https://openairdocs.org/sdr/HKGR175SW6211), Jun 1, 2011: BEARING. UNSECURE. DURING ELEVATOR REMOVAL AND INSPECTION, FOUND RT OTBD HINGE BEARING WITH ALL MOUNTING RIVET HEADS MISSING. NO EVIDENCE OF SHEARING, APPEARS TO BE METAL FATIGUE/
- [SDR PNSA990701](https://openairdocs.org/sdr/PNSA990701), Jul 6, 1999: SEAL. WORN. WHILE TAXIING TO RUNWAY WITH LT ENGINE RPM AT LOW, OIL TEMPURATURE CLIMBED TO RED LINE. AIRCRAFT RETURNED TO GATE. REPLACED ASPIRATOR SEAL. AIRCRAFT RETURNED TO
- [SDR PNSA990604](https://openairdocs.org/sdr/PNSA990604), Jun 2, 1999: BATTERY. FAILED. RT BATTERY INDICATED OVERHEAT CONDITION AFTER TAKEOFF. AIRCRAFT RETURNED TO BASE BATTERY WAS REPLACED. AIRCRAFT RELEASED FOR SERVICE.
- [SDR PNSA980301](https://openairdocs.org/sdr/PNSA980301), Mar 3, 1998: RETRACT MECH. LACK OF LUBE. NOSE GEAR WOULD NOT EXTEND. EMERGENCY EXTENTION PERFORMED LANDING UNEVENTFUL. LUBED AND ADJUSTED NOSE GEAR, OPS CHECK OK.
- [SDR PNSA971005](https://openairdocs.org/sdr/PNSA971005), Oct 16, 1997: TRANSDUCER. FAILED. BEFORE TAXI, DE-ICE PRESSURE DID NOT SHOW ON GAGE. REPLACED PRESSURE TRANSDUCER, OPS CHECK OK.
- [SDR PNSA970811](https://openairdocs.org/sdr/PNSA970811), Aug 27, 1997: CONNECTOR. FAILED. FIRE DETECTION SYSTEM WOULD NOT TEST CORRECTLY. REPLACED TERMINAL END ON PROBE, CHECKS OK.
- [SDR PNSA970809](https://openairdocs.org/sdr/PNSA970809), Aug 27, 1997: FUEL CONTROL. MALFUNCTIONED. ENGINE WOULD NOT REACH TARGET TORQUE. FUEL LIMITED, REPLACED FCU.
- [SDR PNSA970703](https://openairdocs.org/sdr/PNSA970703), Jul 1, 1997: TIRE. CUT. NR 1 MAIN TIRE CUT TO CORD. REPLACED WHEEL ASSY.
- [SDR PNSA970602](https://openairdocs.org/sdr/PNSA970602), Jun 17, 1997: CB PANEL. SHORTED. RT CB LUMINESENT PANEL SHORTED, INTERNALLY WARM TO TOUCH. SHUT OFF SYSTEM. REPLACED PANEL.
- [SDR PNSA960728](https://openairdocs.org/sdr/PNSA960728), Jul 28, 1996: ENGINE. FLAMED OUT. ENGINE INLET BUILT UP ICE, INLET HEAT TURNED ON, ENGINE FLAMED OUT. AIR RESTART ACCOMPLISHED. LANDING UNEVENTFUL.
- [SDR SWIA95540](https://openairdocs.org/sdr/SWIA95540), Mar 7, 1995: AIR TUBE. OUT OF POSITION. EXPERIENCED RAPID DEPRESSURIZATION AT 15000 FEET. UNABLE TO CONTROL PRESSURIZATION IN EITHER NORMAL OR AUTO MODES. RAN NR 2 ENGINE. CHECKED CABIN AND CARGO DOOR

## Related

- Other Fairchild SA227-AC aircraft: https://openairdocs.org/model/fairchild-sa227-ac/aircraft.md
- STCs for the Fairchild SA227-AC: https://openairdocs.org/model/fairchild-sa227-ac/stcs.md
- The Honeywell TPE331-SER series engine: https://openairdocs.org/engine/honeywell-tpe331-ser-series.md

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From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.