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Each collection by its own date: when an AD took effect, an SDR’s difficulty date, an accident’s or incident’s event date.

Airworthiness directives · 58

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