# N555NB: 1977 Bell 206B

- Status: Valid registration
- Airframe: Bell 206B (registry code 1181511, TCDS H2SW (OpenAirDocs match))
- Engine: Allison 250-C20B (registry code 03081, TCDS E4CE (OpenAirDocs match))
- Serial number: 2306
- Year built: 1977
- Type: Rotorcraft
- Airworthiness: Restricted, agriculture and pest control
- Airworthiness date: May 27, 2017
- Certificate issued: May 5, 2017
- Expires: May 31, 2027
- Mode S code: A7132C
- Registered owner: Helicopter Services Of Illinois LLC
- Location: Fisher, IL
- Owner's area on the map: 40.3172° N, 88.3739° W: Placed by OpenAirDocs at the center of ZIP code 61843, within about 3 miles (OpenAirDocs)
- Page: https://openairdocs.org/aircraft/N555NB

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 matched by airframe (Bell 206B) (OpenAirDocs)

- [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
- [AD 80-17-05](https://openairdocs.org/ad/80-17-05): Tail Rotor Blades · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 2 more. Effective Sep 10, 1980
- [AD 80-08-04](https://openairdocs.org/ad/80-08-04): Auxiliary Fuel System · Chadwick C-20 auxiliary fuel system (Phoenix Air-Atlanta STC SH129WE or SH139WE). Effective Apr 17, 1980
- [AD 79-10-01](https://openairdocs.org/ad/79-10-01): External Load Carrying Devices · Bell Helicopter Textron Canada 206A and 206B with STC SH474AL or SH515AL. Effective May 14, 1979
- [AD 78-16-01](https://openairdocs.org/ad/78-16-01): Tail Rotor Drive Shaft · Bell Helicopter Textron Canada 206A and 206B. Effective Sep 14, 1978
- [AD 77-10-06](https://openairdocs.org/ad/77-10-06): Tail Rotor Drive Shaft · Bell Helicopter Textron Canada 206A and 206B. Effective May 13, 1977
- [AD 76-15-03](https://openairdocs.org/ad/76-15-03): Main Rotor Blade Tension-Torsion Straps · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective Jul 29, 1976
- [AD 76-05-01](https://openairdocs.org/ad/76-05-01): Inboard Ribs · Bell Helicopter Textron Canada 206B. Effective Apr 5, 1976
- [AD 76-04-09](https://openairdocs.org/ad/76-04-09): Main Rotor Hub Yokes · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective Mar 30, 1976
- [AD 75-06-03](https://openairdocs.org/ad/75-06-03): Pitch Link Assembly · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective Oct 20, 1975
- [AD 75-18-07](https://openairdocs.org/ad/75-18-07): Rotor Blade Pillow Block Assemblies · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective Sep 19, 1975
- [AD 75-09-09](https://openairdocs.org/ad/75-09-09): Tail Rotor Control Tube · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective Apr 23, 1975
- [AD 75-06-10](https://openairdocs.org/ad/75-06-10): Cabin Roof Straps · Bell Helicopter Textron Canada 206A and 206B. Effective Apr 15, 1975
- [AD 74-25-10](https://openairdocs.org/ad/74-25-10): Rotor Brake Disc · Bell Helicopter Textron Canada 206A and 206B. Effective Dec 16, 1974
- [AD 74-24-01](https://openairdocs.org/ad/74-24-01): Main Rotor Blade Grips · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective Nov 15, 1974
- [AD 74-19-03](https://openairdocs.org/ad/74-19-03): Horizontal Stabilizer Ribs · Bell Helicopter Textron Canada 206A and 206B. Effective Oct 13, 1974
- [AD 74-08-12](https://openairdocs.org/ad/74-08-12): Tail Boom Skin Splice · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective May 14, 1974
- [AD 73-21-03](https://openairdocs.org/ad/73-21-03): Vertical Fin Support Forgings · Bell Helicopter Textron Canada 206A and 206B. Effective Nov 15, 1973
- [AD 73-19-09](https://openairdocs.org/ad/73-19-09): Pitch Link Assemblies · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective Sep 17, 1973
- [AD 73-19-08](https://openairdocs.org/ad/73-19-08): Strap Fittings and Pins · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective Sep 15, 1973
- [AD 71-18-04](https://openairdocs.org/ad/71-18-04): Main Rotor Blade Spar · Bell Helicopter Textron Canada 206A and 206B. Effective Sep 3, 1973
- [AD 73-12-01](https://openairdocs.org/ad/73-12-01): Vertical Fin Skin Cracks · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective Jul 1, 1973
- [AD 73-08-03](https://openairdocs.org/ad/73-08-03): Pylon Support Link · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective Apr 18, 1973
- [AD 72-19-01](https://openairdocs.org/ad/72-19-01): Main Rotor Retention Straps · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 1 more. Effective Sep 15, 1972
- [AD 89-22-01 R1 L](https://openairdocs.org/ad/89-22-01-R1-L): Main Rotor Blades · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 4 more

Historical (superseded or no longer in force): AD 2021-26-08, AD 2021-23-13, AD 2013-20-13, AD 2009-08-03, AD 2009-07-51, AD 2007-19-52, AD 2004-24-08, AD 81-18-01

## ADs matched by engine (Allison 250-C20B) (OpenAirDocs)

- [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 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

Historical (superseded or no longer in force): AD 2017-18-14, AD 2015-02-22, AD 2012-14-06, AD 2004-24-09, AD 2001-20-51

## Information bulletins (advisory)

- [SAIB SW-18-02](https://openairdocs.org/saib/SW-18-02): Loss of Hardware  Tail Rotor Drive Shaft Couplings
- [SAIB SW-12-45](https://openairdocs.org/saib/SW-12-45): Garmin Model 400W/500W Series GPS-WAAS Navigation System
- [SAIB SW-10-42R1](https://openairdocs.org/saib/SW-10-42R1): Emergency Float Kits
- [SAIB SW-10-42](https://openairdocs.org/saib/SW-10-42): Emergency Float Kits
- [SAIB SW-08-42](https://openairdocs.org/saib/SW-08-42): Emergency Float with Liferaft Kits (kits)
- [SAIB SW-05-87](https://openairdocs.org/saib/SW-05-87): 
- [SAIB SW-05-25](https://openairdocs.org/saib/SW-05-25): 
- [SAIB SW-05-24](https://openairdocs.org/saib/SW-05-24): 
- [SAIB SW-04-92](https://openairdocs.org/saib/SW-04-92): 

## Service difficulty reports (1)

- [SDR 2010FA0000047](https://openairdocs.org/sdr/2010FA0000047), Jul 24, 2009: ATTACH FITTING. DURING ANNUAL INSP, DISCOVERED CRACK IN THE TAILBOOM ATTACH FITTING. REMOVED AND REPLACED WITH NEW FITTING.  NO OTHER DEFECTS NOTED.

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CEN12LA141](https://openairdocs.org/ntsb/CEN12LA141), Jan 22, 2012: Bell 206B (N555NB), Irving, TX, substantial damage. Probable cause: A total loss of engine power due to fuel exhaustion as a result of the pilot’s inadequate fuel planning.

## 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; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20120122000489A](https://openairdocs.org/incident/20120122000489A), Jan 22, 2012: Bell 206B (N555NB), Irving, TX, Substantial damage. The pilot took off in this aircraft from kdto (denton airport) with 75 gallons of fuel. He picked up three passengers at dal, landmark aviation. He took these…

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