# Search: 427

Airworthiness directives: 58 matches in release 2026-11-04. Page 1.

- [AD 2019-23-09](https://openairdocs.org/ad/2019-23-09.md): Empennage Structure · Bell Helicopter Textron Canada 427 · Effective Jan 10, 2020
  > This AD applies to Bell Helicopter Textron Canada Limited Model **427** helicopters with a vertical fin…
- [AD 95-24-10](https://openairdocs.org/ad/95-24-10.md): Tires · Cessna 650 and Tires · Effective Feb 21, 1996
  > …**4279N00339** **4279N00340** **4279N00341** **4279N00342** **4279N00343** **4279N00597** **4279N00598** **4279N00599** **4279N00600** **4279N00601** 4280N00075 4280N00199 4280N00200 4280N00201 4280N00203 4280N00204…
- [AD 2009-07-51](https://openairdocs.org/ad/2009-07-51.md): Lever assembly bearing · Bell Helicopter Textron 206A, 206A-1 (OH-58A), 206B and 7 more · superseded or historical
  > Bell Model 206A series, 206B series, 206L series, 407, and **427** helicopters
- [AD 2003-04-12](https://openairdocs.org/ad/2003-04-12.md): Auxiliary Fin Assemblies and Limitations Section of the Rotorcraft Flight Manual (RFM) · Bell Helicopter Textron Canada 427 · Effective Apr 4, 2003
  > Model **427** helicopters, serial numbers 56001 through 56030 with auxiliary fin assemblies, part numbers **427**-035…
- [AD 2003-04-14](https://openairdocs.org/ad/2003-04-14.md): Hydraulic Solenoid Tee Fitting and Tubes · Bell Helicopter Textron Canada 427 · Effective Apr 4, 2003
  > Model **427** helicopters, serial numbers 56001 through 56031, with hydraulic solenoid tee fitting, part number (P…
- [AD 2012-10-01](https://openairdocs.org/ad/2012-10-01.md): Rotorcraft tailboom · Bell Helicopter Textron Canada 427 · Effective Jun 29, 2012
  > ["**427**"]
- [AD 2011-03-03](https://openairdocs.org/ad/2011-03-03.md): Tail Rotor Drive · Bell Helicopter Textron Canada 427 · Effective Apr 14, 2011
  > This AD applies to Bell Helicopter Textron Canada Limited Model **427** helicopters, all serial numbers (SNs…
- [AD 2010-26-51](https://openairdocs.org/ad/2010-26-51.md): Tail rotor blade · Bell Helicopter Textron Canada 206A, 206B, 206L and 10 more · Effective Mar 25, 2011
  > Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, **427**…
- [AD 2009-25-08](https://openairdocs.org/ad/2009-25-08.md): Hydraulic pump driveshaft assembly · Bell Helicopter Textron Canada 407 and 427 · Effective Dec 28, 2009
  > We are adopting a new airworthiness directive (AD) for the BHTC Model 407 and Model **427**…
- [AD 2013-18-06](https://openairdocs.org/ad/2013-18-06.md): Main Rotor Control · Bell Helicopter Textron Canada 206A, 206B, 206L and 10 more · Effective Oct 17, 2013
  > …Model **427** with Swashplate Lateral Link Assembly (upper and lower bearing), P/N **427**-001-021…
- [AD 2001-13-51](https://openairdocs.org/ad/2001-13-51.md): Driveshafts · Bell Helicopter Textron Canada 206L-4, 407 and 427 · Effective Oct 9, 2001 · superseded or historical
  > Model 206L-4, 407, and **427** helicopters, with engine-to-transmission driveshaft assembly (driveshaft), part number…
- [AD 2007-19-52](https://openairdocs.org/ad/2007-19-52.md): Tail rotor blade (blade) · Bell Helicopter Textron 206A, 206B, 206L and 10 more · Effective Dec 5, 2007 · superseded or historical
  > Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, **427**…
- [AD 2025-25-01](https://openairdocs.org/ad/2025-25-01.md): Main Rotor Drive System · Bell Textron Canada 427 · Effective Jan 16, 2026
  > This AD applies to Bell Textron Canada Limited Model **427** helicopters, serial numbers 56001 through 56084…
- [AD 2009-22-11](https://openairdocs.org/ad/2009-22-11.md): Swashplate link assembly bearing · Bell Helicopter Textron Canada 407 and 427 · Effective Nov 16, 2009
  > Airworthiness Directives; Bell Helicopter Textron Canada Model 407 and **427** Helicopters
- [AD 2009-15-15](https://openairdocs.org/ad/2009-15-15.md): Vertical Stabilizer, Attach Fittings · Bell Helicopter Textron Canada 427 · Effective Sep 8, 2009
  > We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model **427**…
- [AD 2016-20-01](https://openairdocs.org/ad/2016-20-01.md): Engine and Transmission Lubrication System · Bell Helicopter Textron Canada 427 and 429 · Effective Oct 17, 2016
  > We are adopting a new airworthiness directive (AD) for Bell Model **427** and Model 429 helicopters…
- [AD 2009-08-03](https://openairdocs.org/ad/2009-08-03.md): Tail rotor blade (blade) · Bell Helicopter Textron 206A, 206B, 206L and 10 more · Effective Apr 24, 2009 · superseded or historical
  > …September 19, 2007 | 407. | | **427**-07-18 | A | September 19, 2007 | **427**. | | 430-07-41 | C…
- [AD 2015-17-02](https://openairdocs.org/ad/2015-17-02.md): Main Rotor Drive System · Bell Helicopter Textron Canada 206L-4, 407, 427 and 1 more · Effective Sep 24, 2015
  > This AD applies to Model 206L-4, 407, **427**, and 429 helicopters with an engine-to…
- [AD 2025-13-01](https://openairdocs.org/ad/2025-13-01.md): Main Rotor Blades · Bell Textron Canada 407 and 427 · Effective Jul 8, 2025
  > This AD applies to Bell Textron Canada Limited Model 407 and **427** helicopters, certificated in any…
- [AD 2009-07-52](https://openairdocs.org/ad/2009-07-52.md): Cyclic control lever assembly · Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 7 more · Effective May 1, 2009
  > …Bell Helicopter Textron Canada Limited Model 206A Series, 206B Series, 206L Series, 407, and **427** Helicopters

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