# N65DA: 1991 Messerschmitt-Boelkow-Blohm BO-105S

- Status: Valid registration
- Airframe: [Messerschmitt-Boelkow-Blohm BO-105S](https://openairdocs.org/model/messerschmitt-boelkow-blohm-bo-105s) (registry code 5626006, 5 seats)
- Engine: [Allison 250-C20B](https://openairdocs.org/engine/allison-250-c20b) (registry code 03081)
- Data sheets: [TCDS H3EU](https://openairdocs.org/tcds/H3EU) (Airbus Helicopters Deutschland GmbH (AHD)), [TCDS E4CE](https://openairdocs.org/tcds/E4CE) (Rolls-Royce Corporation) (OpenAirDocs)
- Serial number: S-854
- Year built: 1991
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard, normal
- Airworthiness date: May 16, 2013
- Certificate issued: September 23, 2020
- Expires: September 30, 2027
- Mode S code: A88AAD
- Registered owner: [Center For Vertical Studies LLC](https://openairdocs.org/faa-owner/CENTER%20FOR%20VERTICAL%20STUDIES%20LLC)
- Location: [Sheridan, WY](https://openairdocs.org/faa-place/WY/Sheridan)
- Owner type: LLC
- 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=65DA
- Page: https://openairdocs.org/aircraft/N65DA

From the FAA registry file of October 21, 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): 48 in force

### Matched by airframe (Messerschmitt-Boelkow-Blohm BO-105S)

- [AD 2025-25-05](https://openairdocs.org/ad/2025-25-05): Rotorcraft Flight Control · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105S and 6 more. Effective Dec 31, 2025
- [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 2023-03-01](https://openairdocs.org/ad/2023-03-01): Main Rotor System · ECD Superlifter Conversion Kit 105-800331 (Eurocopter Deutschland STC SR00043RD). Effective Feb 21, 2023
- [AD 2022-24-07](https://openairdocs.org/ad/2022-24-07): Main Rotor Drive System · ECD Superlifter Conversion Kit 105-800331 (Eurocopter Deutschland STC SR00043RD). Effective Jan 6, 2023
- [AD 2021-13-14](https://openairdocs.org/ad/2021-13-14): Cabin Equipment/Furnishings · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-3 and 1 more. Effective Aug 17, 2021
- [AD 2021-10-21](https://openairdocs.org/ad/2021-10-21): Main Rotor System · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-3 and 9 more. Effective Jul 7, 2021
- [AD 2021-07-08](https://openairdocs.org/ad/2021-07-08): Main Rotor Mast/Swashplate · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-1 and 2 more. Effective Apr 30, 2021
- [AD 2021-05-07](https://openairdocs.org/ad/2021-05-07): Electrical Power System Wiring · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105S and 6 more. Effective Apr 16, 2021
- [AD 2017-05-03](https://openairdocs.org/ad/2017-05-03): Main Rotor Blade · Airbus Helicopters Deutschland BO-105C, BO-105LS A-3 and BO-105S. Effective Mar 17, 2017
- [AD 2015-19-14](https://openairdocs.org/ad/2015-19-14): Main Gear Box · Airbus Helicopters Deutschland BO-105A, BO-105C and BO-105S. Effective Nov 3, 2015
- [AD 2013-20-17](https://openairdocs.org/ad/2013-20-17): Turbine Section · Airbus Helicopters Deutschland BO-105C and BO-105S. Effective Dec 13, 2013
- [AD 2013-16-13](https://openairdocs.org/ad/2013-16-13): Tail Rotor Head · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-1 and 8 more. Effective Sep 27, 2013
- [AD 2013-16-06](https://openairdocs.org/ad/2013-16-06): Main Rotor Blades · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-1 and 2 more. Effective Sep 13, 2013
- [AD 2013-11-15](https://openairdocs.org/ad/2013-11-15): Main Rotor Control · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-1 and 14 more. Effective Jul 26, 2013
- [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 2000-17-08](https://openairdocs.org/ad/2000-17-08): Tension-Torsion (TT) Strap · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-1 and 1 more. Effective Oct 2, 2000
- [AD 96-08-04](https://openairdocs.org/ad/96-08-04): Tandem Hydraulic System · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-1 and 1 more. Effective May 22, 1996
- [AD 90-23-08](https://openairdocs.org/ad/90-23-08): Continuous Ignition System · Airbus Helicopters Deutschland BO-105C and BO-105S. Effective Dec 3, 1990
- [AD 87-26-02 R1](https://openairdocs.org/ad/87-26-02-R1): Main Rotor Control Rods · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-1 and 2 more. Effective Sep 26, 1989
- [AD 87-09-03](https://openairdocs.org/ad/87-09-03): Rotor Blade Bolts · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-1 and 6 more. Effective Aug 26, 1988
- [AD 87-19-01](https://openairdocs.org/ad/87-19-01): Stc Sh479gl Labels · Lubrication oil scavenge filter is installed in the existing… (Facet Filter Products STC SH1853SO or 3 others). Effective Dec 18, 1987
- [AD 85-26-02](https://openairdocs.org/ad/85-26-02): Hydraulic Actuator · Airbus Helicopters Deutschland BO-105A, BO-105C and BO-105S. Effective Feb 25, 1986
- [AD 85-08-01](https://openairdocs.org/ad/85-08-01): Vertical Fin Spar And Skins · Airbus Helicopters Deutschland BO-105A, BO-105C and BO-105S. Effective Apr 26, 1985
- [AD 81-03-01](https://openairdocs.org/ad/81-03-01): Drive Shafts · Airbus Helicopters Deutschland BO-105A, BO-105C and BO-105S. Effective Jan 29, 1981
- [AD 80-16-01 R1](https://openairdocs.org/ad/80-16-01-R1): Engine Cowling Assemblies · Airbus Helicopters Deutschland BO-105A, BO-105C and BO-105S. Effective Sep 19, 1980
- [AD 80-10-02](https://openairdocs.org/ad/80-10-02): Tail Rotor System · Airbus Helicopters Deutschland BO-105A, BO-105C and BO-105S. Effective May 1, 1980
- [AD 79-24-06](https://openairdocs.org/ad/79-24-06): Tail Rotor Blades · Airbus Helicopters Deutschland BO-105A, BO-105C and BO-105S. Effective Dec 10, 1979
- [AD 78-19-03](https://openairdocs.org/ad/78-19-03): Safety Belts · Airbus Helicopters Deutschland BO-105A, BO-105C and BO-105S. Effective Oct 18, 1978
- [AD 77-11-02](https://openairdocs.org/ad/77-11-02): Main Rotor · Airbus Helicopters Deutschland BO-105A, BO-105C and BO-105S. Effective Jun 14, 1977
- [AD 84-16-01](https://openairdocs.org/ad/84-16-01): Tail Rotor Blade Inspection · Airbus Helicopters Deutschland BO-105A, BO-105C and BO-105S

### Matched by engine (Allison 250-C20B)

- [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 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 2021-10-14](https://openairdocs.org/ad/2021-10-14) (historical): Main Rotor System · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-3 and 1 more. Effective Jun 24, 2021
- [AD 2019-07-07](https://openairdocs.org/ad/2019-07-07) (historical): Main Rotor System · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-3 and 9 more. Effective May 24, 2019
- [AD 2002-13-06](https://openairdocs.org/ad/2002-13-06) (historical): Tension-torsion (T-T) straps · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-1 and 1 more. Effective Jul 15, 2002
- [AD 99-19-22](https://openairdocs.org/ad/99-19-22) (historical): TT Strap · Eurocopter Deutschland BO-105A, BO-105C, BO-105LS A-1 and 1 more. Effective Oct 25, 1999
- [AD 97-26-02](https://openairdocs.org/ad/97-26-02) (historical): Main Rotor Mast Flange Crack Inspection · Airbus Helicopters Deutschland BO-105A, BO-105C, BO-105LS A-1 and 2 more. Effective Dec 31, 1997
- [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

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

- [SAIB SW-08-42](https://openairdocs.org/saib/SW-08-42): Emergency Float with Liferaft Kits (kits). Issued Aug 27, 2008

## NTSB investigations

None matched to N65DA.

## FAA accident and incident reports

None matched to N65DA.

## Service difficulty reports

None filed for this aircraft. Reports filed since May 18, 1995, when the mark's previous registration was cancelled.

## Earlier aircraft with N65DA

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N65DA before.

- [Cancelled 1995-05-18](https://openairdocs.org/deregistered/N65DA-1995-05-18): Embraer EMB-110P1, S/N 110389. Triennial form not returned. Owner: [Atlantic Southeast Airlines Inc](https://openairdocs.org/faa-owner/ATLANTIC%20SOUTHEAST%20AIRLINES%20INC), [Atlanta, GA](https://openairdocs.org/faa-place/GA/Atlanta)

## Related

- Other Messerschmitt-Boelkow-Blohm BO-105S aircraft: https://openairdocs.org/model/messerschmitt-boelkow-blohm-bo-105s/aircraft.md
- STCs for the Messerschmitt-Boelkow-Blohm BO-105S: https://openairdocs.org/model/messerschmitt-boelkow-blohm-bo-105s/stcs.md
- The Allison 250-C20B engine: https://openairdocs.org/engine/allison-250-c20b.md

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