# N28HT: Bell 206B - Status: Valid registration - Airframe: [Bell 206B](https://openairdocs.org/model/bell-206b) (registry code 1181511, 5 seats) - Engine: [Allison 250-C20 series](https://openairdocs.org/engine/allison-250-c20-series) (registry code 03020) - Data sheets: [TCDS H2SW](https://openairdocs.org/tcds/H2SW) (Bell Textron Canada Limited), [TCDS E4CE](https://openairdocs.org/tcds/E4CE) (Rolls-Royce Corporation) (OpenAirDocs) - Serial number: 2840 - Type: Rotorcraft - Engine type: Turbo-shaft - Airworthiness: Standard, normal - Airworthiness date: March 7, 1988 - Certificate issued: July 22, 2025 - Expires: July 31, 2032 - Mode S code: A2CC63 - Registered owner: [L&R Investment Partners LLC](https://openairdocs.org/faa-owner/L%26R%20INVESTMENT%20PARTNERS%20LLC) - Location: [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington) - Owner type: LLC - Owner's area on the map: 39.7236° N, 75.5412° W: Placed by OpenAirDocs at the center of ZIP code 19801, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=28HT - Page: https://openairdocs.org/aircraft/N28HT 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 Allison 250-C20 model are included. ## ADs that may apply (OpenAirDocs): 95 in force ### Matched by airframe (Bell 206B) - [AD 2024-20-07](https://openairdocs.org/ad/2024-20-07): Emergency Equipment; Emergency Flotation Section · Apical Emergency Float Kit, P/N 20498 (STC SR00780LA or 12 others). Effective Dec 5, 2024 - [AD 2023-11-07](https://openairdocs.org/ad/2023-11-07): Ground Proximity System · Airbus Helicopters 47, 206, 210 and 237 more. Effective Jun 22, 2023 - [AD 2023-06-05](https://openairdocs.org/ad/2023-06-05): Tail Rotor Drive Shaft · Bell Textron Canada 206A, 206A-1 (OH-58A), 206B and 5 more. Effective May 19, 2023 - [AD 2022-20-04](https://openairdocs.org/ad/2022-20-04): Tail Rotor Drive Shaft · Bell Textron Canada 206, 206A, 206A-1 (OH-58A) and 6 more. Effective Dec 23, 2022 - [AD 2021-19-01](https://openairdocs.org/ad/2021-19-01): Cabin Equipment/Furnishings · Shoulder harness restraint system (Bell Helicopter Textron STC SH2073SO or SH2751SO). Effective Oct 13, 2021 - [AD 2021-15-06](https://openairdocs.org/ad/2021-15-06): Tail Rotor Drive · Bell Textron Canada 206A, 206B, 206L and 3 more. Effective Aug 27, 2021 - [AD 2021-11-01](https://openairdocs.org/ad/2021-11-01): Turbine Section · Bell Textron Canada 206B and 206L. Effective Jul 15, 2021 - [AD 2019-08-10](https://openairdocs.org/ad/2019-08-10): Main Rotor Drive System · Bell Helicopter Textron Canada 206A, 206B, 206L and 4 more. Effective Jun 24, 2019 - [AD 2018-25-17](https://openairdocs.org/ad/2018-25-17): Air Conditioning System Wiring · Airbus Helicopters 206A, 206B, 206L and 13 more. Effective Jan 22, 2019 - [AD 2017-05-04](https://openairdocs.org/ad/2017-05-04): Tension Torsion Strap · Bell Helicopter Textron Canada 206A, 206B, 206L and 3 more. Effective Mar 17, 2017 - [AD 2013-22-21](https://openairdocs.org/ad/2013-22-21): Emergency Flotation Section · Apical Industries, Inc. Emergency Float Kits (Dart Aerospace ULC STC SR01535LA). Effective Dec 13, 2013 - [AD 2013-18-06](https://openairdocs.org/ad/2013-18-06): Main Rotor Control · Bell Helicopter Textron Canada 206A, 206B, 206L and 10 more. Effective Oct 17, 2013 - [AD 2013-18-03](https://openairdocs.org/ad/2013-18-03): Ignition Power Supply · Bell Helicopter Textron Canada 206A, 206B and 206L. Effective Oct 11, 2013 - [AD 2012-12-11](https://openairdocs.org/ad/2012-12-11): Engine EFT/TOT Indicating System · Supplemental lighting system (Aviation Specialties Unlimited STC SR01383SE). Effective Jul 24, 2012 - [AD 2011-25-01](https://openairdocs.org/ad/2011-25-01): Liferafts · Agusta AB412, AB412 EP, 206A and 23 more. Effective Jan 17, 2012 - [AD 2010-26-51](https://openairdocs.org/ad/2010-26-51): Tail rotor blade · Bell Helicopter Textron Canada 206A, 206B, 206L and 10 more. Effective Mar 25, 2011 - [AD 2009-07-52](https://openairdocs.org/ad/2009-07-52): Cyclic control lever assembly · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 7 more. Effective May 1, 2009 - [AD 2008-14-03](https://openairdocs.org/ad/2008-14-03): Tailboom attachment · Bell Helicopter Textron Canada 206A, 206B, 206L and 3 more. Effective Aug 14, 2008 - [AD 2007-25-07](https://openairdocs.org/ad/2007-25-07): Fin support · Bell Helicopter Textron Canada 206A and 206B. Effective Jan 14, 2008 - [AD 2007-23-17](https://openairdocs.org/ad/2007-23-17): Main rotor latch bolts · Bell Helicopter Textron Canada 206A and 206B. Effective Dec 6, 2007 - [AD 2007-22-01](https://openairdocs.org/ad/2007-22-01): Spindle · Bell Helicopter Textron Canada 206A and 206B. Effective Nov 6, 2007 - [AD 2007-01-06](https://openairdocs.org/ad/2007-01-06): Tail rotor blade (blade) · Bell Helicopter Textron Canada 206A, 206B, 206L and 3 more. Effective Feb 13, 2007 - [AD 2005-21-03](https://openairdocs.org/ad/2005-21-03): Tail rotor blade (blade) root doublers (doublers) · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 5 more. Effective Nov 21, 2005 - [AD 2005-16-04](https://openairdocs.org/ad/2005-16-04): High forward crosstube · Bell Helicopter Textron Canada 206A and 206B with STC SH1392SO. Effective Sep 12, 2005 - [AD 2003-13-14](https://openairdocs.org/ad/2003-13-14): Chip detector · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 5 more. Effective Aug 12, 2003 - [AD 2002-20-05](https://openairdocs.org/ad/2002-20-05): Rescue hoists · Agusta A109, A109A, A109A II and 31 more. Effective Nov 7, 2002 - [AD 81-18-01 R1](https://openairdocs.org/ad/81-18-01-R1): Trunnion · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 3 more. Effective Jan 15, 2002 - [AD 2001-02-03](https://openairdocs.org/ad/2001-02-03): Raised Forging Boss · Bell Helicopter Textron Canada 206A, 206B, 206L and 2 more. Effective Mar 9, 2001 - [AD 96-06-04](https://openairdocs.org/ad/96-06-04): Driveshaft Assembly Inspection · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective Apr 25, 1996 - [AD 95-24-06](https://openairdocs.org/ad/95-24-06): Rfms Changes - Autorotation · Bell Helicopter Textron Canada 206B and 206L with STC SH4169NM or 2 others. Effective Dec 27, 1995 - [AD 95-11-14](https://openairdocs.org/ad/95-11-14): Crosstubes · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 5 more. Effective Jun 30, 1995 - [AD 95-09-06](https://openairdocs.org/ad/95-09-06): Fuel Valve Switch · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 4 more. Effective Jun 8, 1995 - [AD 94-24-11](https://openairdocs.org/ad/94-24-11): Tail Rotor Drive Shaft · Bell Helicopter Textron Canada 206A, 206B, 206L and 2 more. Effective Jan 6, 1995 - [AD 94-20-03](https://openairdocs.org/ad/94-20-03): Main Rotor Hub Trunnion · Bell Helicopter Textron Canada 206A, 206B, 206B-1 and 4 more. Effective Oct 11, 1994 - [AD 94-19-02](https://openairdocs.org/ad/94-19-02): Swashplate Support Assembly · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 4 more. Effective Sep 28, 1994 - [AD 94-15-07](https://openairdocs.org/ad/94-15-07): Main Rotor Blades · Bell Helicopter Textron Canada 206A, 206B, 206L and 3 more. Effective Aug 26, 1994 - [AD 92-09-07](https://openairdocs.org/ad/92-09-07): Vertical Fin Supports · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective Jun 29, 1992 - [AD 92-06-12](https://openairdocs.org/ad/92-06-12): Transmission Failure · Bell Helicopter Textron Canada 206A, 206B, 206L and 2 more. Effective Apr 13, 1992 - [AD 92-01-05](https://openairdocs.org/ad/92-01-05): Main Rotor Blades · Bell Helicopter Textron Canada 206A, 206B, 206L and 2 more. Effective Feb 5, 1992 - [AD 90-13-01 R1](https://openairdocs.org/ad/90-13-01-R1): Tail Rotor Blade Assembly · Bell Helicopter Textron Canada 206B, 206L, 206L-1 and 1 more. Effective Oct 17, 1991 - [AD 90-21-03](https://openairdocs.org/ad/90-21-03): Tail Rotor Blade Assembly · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 4 more. Effective Aug 14, 1991 - [AD 91-03-12](https://openairdocs.org/ad/91-03-12): Emergency Float Bags · Bell Helicopter Textron Canada 206A, 206B, 206L and 2 more. Effective Feb 28, 1991 - [AD 89-10-11 R1](https://openairdocs.org/ad/89-10-11-R1): Rfm Limitations · Bell Helicopter Textron Canada 206A and 206B. Effective Jul 31, 1989 - [AD 88-23-03](https://openairdocs.org/ad/88-23-03): Tail Rotor Yoke Assembly · Bell Helicopter Textron Canada 206A, 206B, 206B-1 and 3 more. Effective Jul 25, 1989 - [AD 78-11-02 R1](https://openairdocs.org/ad/78-11-02-R1): Rotor Blade Straps · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 4 more. Effective Dec 15, 1988 - [AD 87-10-11](https://openairdocs.org/ad/87-10-11): Main Rotor Mast Assemblies · Bell Helicopter Textron Canada 206A, 206B, 206L and 2 more. Effective Aug 8, 1988 - [AD 86-24-01](https://openairdocs.org/ad/86-24-01): T/R Assembly · Bell Helicopter Textron Canada 206A, 206B and 206L. Effective Dec 15, 1986 - [AD 85-26-06](https://openairdocs.org/ad/85-26-06): Tail Rotor Blades · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 4 more. Effective Jan 31, 1986 - [AD 85-25-01](https://openairdocs.org/ad/85-25-01): Cyclic Control Stick · Bell Helicopter Textron Canada 206A, 206B, 206L and 2 more. Effective Dec 30, 1985 - [AD 80-18-04 R1](https://openairdocs.org/ad/80-18-04-R1): Main Rotor Trunnion · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 3 more. Effective Nov 24, 1980 ### Matched by engine (Allison 250-C20 series) - [AD 2022-10-06](https://openairdocs.org/ad/2022-10-06): Turbine Section · Rolls-Royce 250-C20, 250-C20B, 250-C20C (T63-A-720) and 9 more. Effective Jun 28, 2022 - [AD 2018-13-01](https://openairdocs.org/ad/2018-13-01): Turbine Governor · Rolls-Royce 250-C10 (T63-A-5), 250-C18, 250-C18A and 24 more. Effective Aug 16, 2018 - [AD 2006-16-04](https://openairdocs.org/ad/2006-16-04): Inspection of the fuel nozzle screen · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 43 more. Effective Sep 7, 2006 - [AD 2006-13-06](https://openairdocs.org/ad/2006-13-06): Gas producer rotor assembly tie bolts · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 16 more. Effective Jul 26, 2006 - [AD 2005-10-13](https://openairdocs.org/ad/2005-10-13): Turbine energy absorbing ring · Rolls-Royce 250-B17B, 250-B17C, 250-B17D and 7 more. Effective Jun 22, 2005 - [AD 2004-26-09](https://openairdocs.org/ad/2004-26-09): Compressor Adaptor Couplings · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 8 more. Effective Feb 8, 2005 - [AD 2001-24-12](https://openairdocs.org/ad/2001-24-12): Helical Torquemeter Gearshaft Assembly · Rolls-Royce 250-B17, 250-B17C, 250-B17D and 13 more. Effective Dec 19, 2001 - [AD 98-24-28](https://openairdocs.org/ad/98-24-28): Main Fuel Control Bellows · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 36 more. Effective Jan 7, 1999 - [AD 96-19-01](https://openairdocs.org/ad/96-19-01): Superior Air Parts Manufacture Approval (PMA) Bearings · Rolls-Royce 250-B15G, 250-B17F, 250-B17F/1 and 17 more. Effective Sep 26, 1996 - [AD 93-25-05](https://openairdocs.org/ad/93-25-05): Driveshaft Flex Coupling Bolts, Bushings, and Nuts · Rolls-Royce 250-C20S with STC SE2352NM. Effective Feb 22, 1994 - [AD 88-17-01](https://openairdocs.org/ad/88-17-01): Fuel Controls · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 26 more. Effective Mar 1, 1989 - [AD 83-03-02 R1](https://openairdocs.org/ad/83-03-02-R1): Slotted Third Stage Turbine Wheels · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 5 more. Effective Feb 28, 1984 - [AD 82-24-05](https://openairdocs.org/ad/82-24-05): Control Assembly and Power Turbine Governor Assembly · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 43 more. Effective Nov 26, 1982 - [AD 82-13-03](https://openairdocs.org/ad/82-13-03): Modify Engine High Pressure Fuel Control Filter Assembly · Rolls-Royce 250-C20 and 250-C20B. Effective Jul 1, 1982 - [AD 79-21-01 R1](https://openairdocs.org/ad/79-21-01-R1): Third Stage Turbine Wheel Blade · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 3 more. Effective Jun 3, 1981 - [AD 78-14-08](https://openairdocs.org/ad/78-14-08): Fuel Pump Drive Spline · Rolls-Royce 250-C18, 250-C18A, 250-C18B and 3 more. Effective Oct 24, 1979 - [AD 77-15-12](https://openairdocs.org/ad/77-15-12): Power Turbine Coupling Nut · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 23 more. Effective Sep 23, 1977 - [AD 77-09-08](https://openairdocs.org/ad/77-09-08): Bleed Valve Diaphragm · Rolls-Royce 250-B17, 250-B17B, 250-C20 and 2 more. Effective Jul 18, 1977 - [AD 74-14-03](https://openairdocs.org/ad/74-14-03): Fuel Control Rigging · Rolls-Royce 250-C20. Effective Jul 10, 1974 - [AD 73-19-07](https://openairdocs.org/ad/73-19-07): Turbine Governor-To-Fuel Control Tube · Rolls-Royce 250-C20. Effective Sep 14, 1973 - [AD 72-03-06](https://openairdocs.org/ad/72-03-06): Turbine Wheels · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 9 more. Effective Feb 8, 1972 ### Historical (superseded or no longer in force) - [AD 2021-26-08](https://openairdocs.org/ad/2021-26-08) (historical): Tail Rotor Drive Shaft · Bell Textron Canada 206, 206A, 206A-1 and 7 more. Effective Jan 27, 2022 - [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13) (historical): Ground Proximity System · Airbus Helicopters K-225, K-190A, K-240 and 237 more. Effective Dec 9, 2021 - [AD 2013-20-13](https://openairdocs.org/ad/2013-20-13) (historical): Turbine Section · Bell Helicopter Textron Canada 206A, 206B and 206L. Effective Dec 10, 2013 - [AD 2009-08-03](https://openairdocs.org/ad/2009-08-03) (historical): Tail rotor blade (blade) · Bell Helicopter Textron 206A, 206B, 206L and 10 more. Effective Apr 24, 2009 - [AD 2009-07-51](https://openairdocs.org/ad/2009-07-51) (historical): Lever assembly bearing · Bell Helicopter Textron 206A, 206A-1 (OH-58A), 206B and 7 more - [AD 2007-19-52](https://openairdocs.org/ad/2007-19-52) (historical): Tail rotor blade (blade) · Bell Helicopter Textron 206A, 206B, 206L and 10 more. Effective Dec 5, 2007 - [AD 2004-24-08](https://openairdocs.org/ad/2004-24-08) (historical): Tail rotor blade (blade) · Bell Helicopter Textron 206A, 206B, 206L and 3 more. Effective Dec 16, 2004 - [AD 81-18-01](https://openairdocs.org/ad/81-18-01) (historical): Main Rotor Trunnions · Bell Helicopter Textron 206A, 206A-1 (OH-58A), 206B and 3 more. Effective Sep 22, 1981 - [AD 2017-18-14](https://openairdocs.org/ad/2017-18-14) (historical): Turbine Section · Rolls-Royce 250-C20, 250-C20B, 250-C20F and 8 more. Effective Oct 13, 2017 - [AD 2015-02-22](https://openairdocs.org/ad/2015-02-22) (historical): Repetitive visual inspections · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 15 more. Effective Mar 9, 2015 - [AD 2012-14-06](https://openairdocs.org/ad/2012-14-06) (historical): Released turbine blades and shrouds · Rolls-Royce 250-C20, 250-C20B and 250-C20R/2. Effective Aug 14, 2012 - [AD 2004-24-09](https://openairdocs.org/ad/2004-24-09) (historical): Fuel nozzle · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 40 more. Effective Jan 5, 2005 - [AD 2001-20-51](https://openairdocs.org/ad/2001-20-51) (historical): Helical Torquemeter Gearshaft Assembly · 250-B17, 250-B17C, 250-B17D and 12 more All 108: https://openairdocs.org/aircraft/N28HT/ads.md ## Information bulletins (advisory) (9 in force) - [SAIB SW-18-02](https://openairdocs.org/saib/SW-18-02): Loss of Hardware Tail Rotor Drive Shaft Couplings. Issued Nov 2, 2017 - [SAIB SW-12-45](https://openairdocs.org/saib/SW-12-45): Garmin Model 400W/500W Series GPS-WAAS Navigation System. Issued Oct 3, 2012 - [SAIB SW-10-42R1](https://openairdocs.org/saib/SW-10-42R1): Emergency Float Kits. Issued Aug 11, 2010 - [SAIB SW-08-42](https://openairdocs.org/saib/SW-08-42): Emergency Float with Liferaft Kits (kits). Issued Aug 27, 2008 - [SAIB SW-05-87](https://openairdocs.org/saib/SW-05-87): . Issued Sep 30, 2005 - [SAIB SW-05-25](https://openairdocs.org/saib/SW-05-25): . Issued Jan 10, 2005 - [SAIB SW-05-24](https://openairdocs.org/saib/SW-05-24): . Issued Dec 22, 2004 - [SAIB SW-04-92](https://openairdocs.org/saib/SW-04-92): . Issued Sep 30, 2004 - [SAIB CE-01-10](https://openairdocs.org/saib/CE-01-10): . Issued Jan 24, 2001 - [SAIB SW-10-42](https://openairdocs.org/saib/SW-10-42) (historical): Emergency Float Kits. Issued Aug 5, 2010 ## NTSB investigations None matched to N28HT. ## FAA accident and incident reports None matched to N28HT. ## Service difficulty reports None filed for this aircraft. ## Related - Other Bell 206B aircraft: https://openairdocs.org/model/bell-206b/aircraft.md - STCs for the Bell 206B: https://openairdocs.org/model/bell-206b/stcs.md - The Allison 250-C20 series engine: https://openairdocs.org/engine/allison-250-c20-series.md --- 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.