# N257MC: 1986 Dornier DORNIER 228-202

- Status: Valid registration
- Airframe: [Dornier DORNIER 228-202](https://openairdocs.org/model/dornier-dornier-228-202) (registry code 2992030, 20 seats)
- Engine: [AiResearch TPE331-5-252M](https://openairdocs.org/engine/airesearch-tpe331-5-252m) (registry code 01522)
- Data sheets: [TCDS A16EU](https://openairdocs.org/tcds/A16EU) (General Atomics AeroTec Systems GmbH) (OpenAirDocs)
- Serial number: 8102
- Year built: 1986
- Type: Fixed wing multi engine
- Engine type: Turbo-prop
- Airworthiness: Standard, normal
- Airworthiness date: June 19, 2001
- Certificate issued: February 4, 1999
- Expires: July 31, 2029
- Mode S code: A27295
- Registered owner: [Bighorn Airways Inc](https://openairdocs.org/faa-owner/BIGHORN%20AIRWAYS%20INC)
- Location: [Sheridan, WY](https://openairdocs.org/faa-place/WY/Sheridan)
- Owner type: Corporation
- Owner's area on the map: 44.8325° N, 106.8963° W: Placed by OpenAirDocs at the center of ZIP code 82801, within about 13 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=257MC
- Page: https://openairdocs.org/aircraft/N257MC

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): 20 in force

### Matched by airframe (Dornier DORNIER 228-202)

- [AD 2025-07-01](https://openairdocs.org/ad/2025-07-01): Air Data Computer · Synthetic Vision Electronic Flight Information System (Arrow STC SR09595RC or ST01523WI). Effective May 15, 2025
- [AD 2016-17-05](https://openairdocs.org/ad/2016-17-05): Engine Controls · RUAG Aerospace Services Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Sep 30, 2016
- [AD 2014-10-02](https://openairdocs.org/ad/2014-10-02): Time Limits · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Jul 28, 2014
- [AD 2011-03-05](https://openairdocs.org/ad/2011-03-05): Fuselage · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Mar 14, 2011
- [AD 2009-20-07](https://openairdocs.org/ad/2009-20-07): Landing gear · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 2 more. Effective Nov 3, 2009
- [AD 2009-12-16](https://openairdocs.org/ad/2009-12-16): Standard Practices/Structures · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Jul 17, 2009
- [AD 2009-07-09](https://openairdocs.org/ad/2009-07-09): Aileron trim actuator · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective May 11, 2009
- [AD 2008-09-09](https://openairdocs.org/ad/2008-09-09): Control cables · Dornier Luftfahrt Dornier 228-200, Dornier 228-201, Dornier 228-202 and 1 more. Effective Jun 2, 2008
- [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 2003-16-17](https://openairdocs.org/ad/2003-16-17): Cockpit and Cabin Auxiliary Heating Wiring · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Oct 6, 2003
- [AD 2001-21-01](https://openairdocs.org/ad/2001-21-01): Horizontal Stabilizer Skin and Ribs · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Nov 30, 2001
- [AD 2001-04-04](https://openairdocs.org/ad/2001-04-04): Windshield Spray Nozzle · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Apr 6, 2001
- [AD 2000-06-02](https://openairdocs.org/ad/2000-06-02): Pneumatic Deicing Boots · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective May 5, 2000
- [AD 98-11-16](https://openairdocs.org/ad/98-11-16): Landing Gear Warning System · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Jul 11, 1998
- [AD 97-22-09](https://openairdocs.org/ad/97-22-09): Pilot s Operating Handbook - Power Levers · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Dec 5, 1997
- [AD 96-09-14](https://openairdocs.org/ad/96-09-14): AFM - Icing · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Jun 11, 1996
- [AD 94-19-06](https://openairdocs.org/ad/94-19-06): Crew Oxygen Masks · 328 Support Services 328-100, 328-300, 500 and 17 more. Effective Oct 6, 1994
- [AD 91-12-14](https://openairdocs.org/ad/91-12-14): AC Power Supply · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 2 more. Effective Jul 19, 1991
- [AD 91-12-13](https://openairdocs.org/ad/91-12-13): Electric Trim System · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Jul 19, 1991
- [AD 91-05-03](https://openairdocs.org/ad/91-05-03): Bonding Straps · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Mar 25, 1991

### Matched by engine (AiResearch TPE331-5-252M)

None in force.

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

- [AD 2009-13-04](https://openairdocs.org/ad/2009-13-04) (historical): Engine controls · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Jul 24, 2009
- [AD 2008-08-15](https://openairdocs.org/ad/2008-08-15) (historical): Internal of the elevator and rudder · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective May 27, 2008
- [AD 2007-11-03](https://openairdocs.org/ad/2007-11-03) (historical): Centre section of fuselage frame 19 · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Jun 26, 2007
- [AD 2006-11-19](https://openairdocs.org/ad/2006-11-19) (historical): Flight deck overhead panels (locations 5VE and 6VE) · Dornier Luftfahrt Dornier 228-100, Dornier 228-101, Dornier 228-200 and 3 more. Effective Jul 14, 2006

## Information bulletins (advisory) (1 in force)

- [SAIB CE-08-25](https://openairdocs.org/saib/CE-08-25): Propellers/Propulsion - Controlling. Issued May 23, 2008

## NTSB investigations

None matched to N257MC.

## FAA accident and incident reports

None matched to N257MC.

## Service difficulty reports (2)

As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR BIGA20200609001](https://openairdocs.org/sdr/BIGA20200609001), Jun 3, 2020: RESTRICTOR VALVE. LEAKING. THE RESTRICTOR VALVE ASSEMBLY (ATTACHED TO THE SHUTTLE VALVE ON THE NOSE LANDING GEAR ACTUATOR) BLEW OUT IT'S BODY SEALING O-RING LEADING TO COMPLETE HYDRAULIC 
- [SDR BIGA20150406001](https://openairdocs.org/sdr/BIGA20150406001), Apr 6, 2015: CONTROL ROD. WORN. DURING INSPECTION, THE AILERON CONTROL ROD WAS FOUND TO BE WORN APPROX 15% OF THE THICKNESS. THE ROD WAS WORN FROM THE AILERON GUST LOCK SYS & SEEMS ONLY WEAR O

## STCs that may be installed (OpenAirDocs) (42)

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 (Dornier DORNIER 228-202)

- [STC SA02019SE-D](https://openairdocs.org/stc/SA02019SE-D): Installation of Garmin Model GTN 625/635/650; 725/750 Navigation System. Garmin International Inc
- [STC SA12370NY](https://openairdocs.org/stc/SA12370NY): Installation of a Garmin G700 Avionics System. Bighorn Airways, Inc
- [STC SA11158SC](https://openairdocs.org/stc/SA11158SC): Demonstration of aircraft tolerance to potential electromagnetic interference from certain Transmitting Potable Electronic Devices (T-PEDS). Liberty Partners Inc
- [STC SA02738CH](https://openairdocs.org/stc/SA02738CH): Installation of L-3 Communications Avionics Systems. Acron Aviation Inc
- [STC SA09887AC](https://openairdocs.org/stc/SA09887AC): Installation of an Avionica MK-III mini Quick Access Recorder (QAR) and optional 4G or LTE Avionica Cellular Module (avCM. Aircraft Systems and Manufacturing Inc
- [STC SA04051CH](https://openairdocs.org/stc/SA04051CH): Certification of Automatic Dependent Surveillance - Broadcast (ADS-B) Out System with Rockwell Collins TDR-94/-94D Transponders. CMD Flight Solutions LLC
- [STC SA02658SE](https://openairdocs.org/stc/SA02658SE): Installation of Garmin GI 275 Multi-Function Display System. Garmin International Inc
- [STC SA02010WI](https://openairdocs.org/stc/SA02010WI): Installation of the Mid-Continent Instruments & Avionics MD23 FLEX Custom Function Display (CFD). Mid-Continent Instruments and Avionics
- [STC SA00076IB](https://openairdocs.org/stc/SA00076IB): Installation of Photo luminescent Safety Systems. STG AEROSPACE GERMANY GmbH
- [STC SA02075SE](https://openairdocs.org/stc/SA02075SE): Installation of a Mid-Continent MD835( ) Lithium Ion Battery. Mid-Continent Instrument Co. Inc
- [STC SA04514NY](https://openairdocs.org/stc/SA04514NY): Single/Dual Transponder System ADS-B Upgrade. Scandinavian Avionics Design ApS
- [STC SA02677LA](https://openairdocs.org/stc/SA02677LA): Modification to upgrade the existing Mode S Transponder system by installing the ACSS NXT-700 Transponder with ADS-B Out and optionally install the ACSS NXG-900 GPS as the position source for ADS-B Out. Aviation Communication and Surveillance Systems (ACSS) LLC
- [STC SA02678LA](https://openairdocs.org/stc/SA02678LA): Modification to upgrade the existing Mode S Transponder system by installing the ACSS NXT-600 Transponder with ADS-B Out and optionally install the ACSS NXG-900 GPS as the position source for ADS-B Out. Aviation Communication and Surveillance Systems (ACSS) LLC
- [STC SA01714WI](https://openairdocs.org/stc/SA01714WI): Installation of a Garmin transponders: (a) GTX 330/330D/33/33D with ADS-B Out functionality; (b) GTX 335/335R/345/345R with ADS-B Out and In functionality; or (c) GTX 335R/345R with ADS-B Out functionality in select airplanes installed with G950/G1000 systems. Garmin International Inc
- [STC SA03973NY](https://openairdocs.org/stc/SA03973NY): Replacement of existing TCAS 7.0 by TCAS 7.1. Scandinavian Avionics Design ApS
- [STC SA00845DE](https://openairdocs.org/stc/SA00845DE): Installation of two Ferno Advanced Life Support Litters (ALSL) with equipment mounts and medical electrical power. Bighorn Airways Inc
- [STC SA329CH-D](https://openairdocs.org/stc/SA329CH-D): Installation of AlliedSignal Engines Models TPE 331-10T-511D, TPE-331-10GT-511D, TPE 331-10GP-511D, or TPE 331-10P-511D. StandardAero Business Aviation Services, LLC
- [STC SA01969SE](https://openairdocs.org/stc/SA01969SE): Installation of a Mid-Continent MD302 Standby Attitude Module. Mid-Continent Instruments and Avionics
- [STC SA00478CH](https://openairdocs.org/stc/SA00478CH): Installation of Cooper Superflite 102 Fabric. Aviation Products Systems Inc
- [STC SA02434SE](https://openairdocs.org/stc/SA02434SE): Installation of a Supplemental Lighting System. Aviation Specialties Unlimited Inc
- [STC SA02121SE](https://openairdocs.org/stc/SA02121SE): Installation of Garmin GTS 825 (TAS) or GTS 855 (TCAS I) Traffic System. Garmin International Inc
- [STC SA00674WI-D](https://openairdocs.org/stc/SA00674WI-D): Modification of Collins VHF-22A/VHF-22B VHF COMM Receiver Transmitter with CTL-22 Control Pro Line II System Installation to a Collins VHF-22C/VHF-22D VHF COMM Receiver Transmitter with CTL-22C Control 8.33 kHz Pro Line II system installation. Rockwell Collins Inc
- [STC SA03052NY](https://openairdocs.org/stc/SA03052NY): Installation of Model MTV-27-1-E-C-F-R(G)/CFRL250-55b full feathering and reversing 5-bladed propellers. MT- Propeller Entwicklung GmbH
- [STC SA02392AK](https://openairdocs.org/stc/SA02392AK): Limit the maximum passenger seating capacity to 9. Bighorn Airways Inc
- [STC SA01636WI-D](https://openairdocs.org/stc/SA01636WI-D): Modification of Rockwell Collins, Inc. VHF-4000 and VHF-4000E installations. Rockwell Collins Inc
- [STC SA00681WI-D](https://openairdocs.org/stc/SA00681WI-D): Modification of Collins VHF-20/VHF-20A/VHF-20B VHF COMM Receiver Transmitter with CTL-20 Control Pro Line I System Installation to a Collins VHF-22C/VHF-22D VHF COMM Receiver Transmitter with CTL-22C Control 8.33 kHz Pro Line II System Installation. Rockwell Collins Inc
- [STC SA00068SE](https://openairdocs.org/stc/SA00068SE): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1). Electronics International Inc
- [STC ST02540AT-D](https://openairdocs.org/stc/ST02540AT-D): Installation of replacement fuel tank sealant system. FFC Manufacturing
- [STC SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc
- [STC SA02383NY](https://openairdocs.org/stc/SA02383NY): Installation of KTA 970 TCAS I. Western Avionics
- [STC SA01306WI-D](https://openairdocs.org/stc/SA01306WI-D): Modification of a Collins ALT-50A or ALT-55B Radio Altimeter system installation to a Collins ALT-1000 or ALT-4000 Radio Altimeter system installation. Rockwell Collins Inc
- [STC SA02335NY](https://openairdocs.org/stc/SA02335NY): The installation of Honeywell EGPWS. Western Avionics
- [STC SA01141WI-D](https://openairdocs.org/stc/SA01141WI-D): Modification of a single or dual Collins TDR-94 or TDR-94D Mode S Transponder System installation with CTL-92 control head to a Flight ID capable Collins TDR-94 or TDR-94 Mode S Transponder System installation with CTL-92E control head. Rockwell Collins Inc
- [STC SA10499SC](https://openairdocs.org/stc/SA10499SC): Revised airplane performance data previously modified by installation of Honeywell International Inc. TPE331-10 engines. Bighorn Airways Inc
- [STC SA01157LA](https://openairdocs.org/stc/SA01157LA): Installation of Electronics International Model FP-5 or FP-5L fuel flow/fuel pressure instrument as a replacement instrument. Electronics International Inc
- [STC ST01167NY](https://openairdocs.org/stc/ST01167NY): Installation of an AlliedSignal MKVI ground proximity warning system. Innotech Aviation
- [STC ST01179NY](https://openairdocs.org/stc/ST01179NY): Installation of BFGoodrich Aerospace TCAS 791, TCAS I Traffic Alert Collision Avoidance System. Innotech Aviation
- [STC SA3824SW](https://openairdocs.org/stc/SA3824SW): Installation of a freon air conditioner system. AAR Airframe and Accessories Group
- [STC SA7831SW](https://openairdocs.org/stc/SA7831SW): Installation of dual Marathon TSP-280 nickel cadmium batteries. Marathon Power Tech Co
- [STC SA3496SW-D](https://openairdocs.org/stc/SA3496SW-D): Installation of a Century Automatic Flight System model AK1003. Century Flight Systems Inc
- [STC SA3497SW-D](https://openairdocs.org/stc/SA3497SW-D): Installation of Century Automatic Flight System model YK 1004. Century Flight Systems Inc
- [STC SA463NE](https://openairdocs.org/stc/SA463NE): Installation of Aviation Instrument Model 510-24P and510-29B gyro horizons. Castleberry Instruments & Avionics, Inc

## Related

- Other Dornier DORNIER 228-202 aircraft: https://openairdocs.org/model/dornier-dornier-228-202/aircraft.md
- The AiResearch TPE331-5-252M engine: https://openairdocs.org/engine/airesearch-tpe331-5-252m.md

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