What this page is: a restatement of what the official Federal Register
and manufacturer records show as of the date listed below each item. It is not
a determination that any specific aircraft or engine is, or is not, in compliance.
Under 14 CFR §91.403 and §91.417, the aircraft owner/operator is responsible
for maintaining airworthiness and required records. Always verify against the official FAA
and manufacturer sources linked below before making a maintenance or airworthiness decision.
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Airworthiness Directives
18 records · 4 superseded records nested above
AD
2026-16-02
FR doc 2026-16043
AD 2026-16-02Published 2026-08-06Effective 2026-09-10
Bell Textron Canada Limited Helicopters
Not yet effective — effective 2026-09-10
Requires a one-time visual inspection for proper installation of the washer installed on the pitch link assembly and, depending on the results of the inspection, corrective actions.
Full official abstract
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 505 helicopters. This AD was prompted by a report of a quality escape in the production installation of a washer installed on the tail rotor pitch link assembly (pitch link assembly). This AD requires a one-time visual inspection for proper installation of the washer installed on the pitch link assembly and, depending on the results of the inspection, corrective actions. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2026-16043, retrieved 2026-08-18 · not yet re-verified against the live record
Requires the inspection requirements of AD 2024-02- 55 and would limit the applicability to exclude certain serial numbered BTCL Model 505 helicopters with an improved design vertical stabilizer top end cap installed at production.
1 AD superseded by this oneretired · earliest 2024-02-28
AD
2024-02-55
FR doc 2024-04172
AD 2024-02-55Published 2024-02-28Effective 2024-03-14
Requires an initial and recurring inspections of the vertical stabilizer top end cap assembly and corrective action if a crack is found, as specified in a Transport Canada AD, which is incorporated by reference.
Full official abstract
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is adopting a new airworthiness directive (AD) for Bell Textron Canada Limited Model 505 helicopters. This AD was prompted by reports of cracked vertical stabilizer top end cap assemblies. This AD requires an initial and recurring inspections of the vertical stabilizer top end cap assembly and corrective action if a crack is found, as specified in a Transport Canada AD, which is incorporated by reference. The FAA previously sent this AD as an emergency AD to all known U.S. owners and operators of these helicopters. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2024-04172, retrieved 2026-08-18 · not yet re-verified against the live record
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is superseding Airworthiness Directive (AD) 2024-02- 55, which applies to certain Bell Textron Canada Limited (BTCL) Model 505 helicopters. AD 2024-02-55 required initial and recurring inspections of the vertical stabilizer top end cap assembly and corrective action if a crack is found. Since the FAA issued AD 2024-02- 55, the manufacturer introduced a new one- piece vertical stabilizer machined top end cap assembly, which is implemented during production, and designed a new replacement for the vertical stabilizer machined top end cap assembly currently in service. This AD continues to require the inspection requirements of AD 2024-02- 55 and would limit the applicability to exclude certain serial numbered BTCL Model 505 helicopters with an improved design vertical stabilizer top end cap installed at production. This AD also requires replacing the vertical stabilizer top end cap assembly with an improved design top end cap assembly, which constitutes a terminating action for the recurring detailed visual inspections. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2026-15365, retrieved 2026-08-18 · not yet re-verified against the live record
AD 2026-05-51Published 2026-04-01Effective 2026-04-16
Bell Textron Canada Limited Helicopters
Requires revising the Limitations section of the existing rotorcraft flight manual (RFM) for the helicopter to prohibit the use of ballast weights within the aft movable ballast box assembly.
Full official abstract
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited (Bell) Model 505 helicopters. The FAA previously sent this AD as an emergency AD to all known U.S. owners and operators of these helicopters. This AD was prompted by a failure of the hinge assembly on the aft movable ballast box assembly, which could allow the ballast weights to escape the ballast box and strike the tail rotor assembly. This AD requires revising the Limitations section of the existing rotorcraft flight manual (RFM) for the helicopter to prohibit the use of ballast weights within the aft movable ballast box assembly. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2026-06369, retrieved 2026-08-18 · not yet re-verified against the live record
Requires removing all ballast weights from the aft movable ballast box assembly and prohibits the use of ballast weights within the aft movable ballast box assembly, as specified in a Transport Canada emergency AD, which is…
Full official abstract
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited (Bell) Model 505 helicopters. The FAA previously sent this AD as an emergency AD to all known U.S. owners and operators of these helicopters. This AD was prompted by deformation and/or improper pin engagement in the knuckles of the door hinge on the aft movable ballast box assembly. This AD requires removing all ballast weights from the aft movable ballast box assembly and prohibits the use of ballast weights within the aft movable ballast box assembly, as specified in a Transport Canada emergency AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2025-06121, retrieved 2026-08-18 · not yet re-verified against the live record
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is superseding Airworthiness Directive (AD) 2025-06- 51, which applied to certain Bell Textron Canada Limited (Bell) Model 505 helicopters. AD 2025-06-51 required removing all ballast weights from the aft movable ballast box assembly and prohibited the use of ballast weights within the aft movable ballast box assembly. Since the FAA issued AD 2025-06-51, Bell has developed a modification to the ballast box door assembly and the FAA has determined that the new actions would terminate the requirements of AD 2025-06-51. This AD requires installing the modification to the aft movable ballast box door assembly. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2025-19785, retrieved 2026-08-18 · not yet re-verified against the live record
AD 2025-18-10Published 2025-09-10Effective 2025-09-25
Bell Textron Canada Limited Helicopters
Requires a one-time visual inspection for cracks on the mounting bracket on the oil cooler fan assembly housing and modification of the mounting bracket.
Full official abstract
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 505 helicopters. This AD was prompted by a report of a crack on the mounting bracket on the oil cooler fan assembly housing. This AD requires a one-time visual inspection for cracks on the mounting bracket on the oil cooler fan assembly housing and modification of the mounting bracket. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2025-17384, retrieved 2026-08-18 · not yet re-verified against the live record
AD 2025-09-01Published 2025-04-28Effective 2025-05-13
Bell Textron Canada Limited Helicopters
Requires repetitively inspecting the wire harnesses at certain locations for damage, and if any wire damage is found, repairing the damaged wire/bundles, as specified in a Transport Canada AD, which is incorporated by reference.
Full official abstract
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited (BTCL) Model 505 helicopters. This AD was prompted by reports of possible chafing in certain locations between the basic and supplemental helicopter wiring and the structure. This AD requires repetitively inspecting the wire harnesses at certain locations for damage, and if any wire damage is found, repairing the damaged wire/bundles, as specified in a Transport Canada AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2025-07274, retrieved 2026-08-18 · not yet re-verified against the live record
AD 2024-15-10Published 2024-09-16Effective 2024-10-21
Bell Textron Canada Limited Helicopters
Requires installing a grommet around the sump drain port fitting airframe hole, as specified in a Transport Canada AD, which is incorporated by reference.
Full official abstract
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 505 helicopters. This AD was prompted by a fuel leakage discovered during fuel system crash impact testing activity. This AD requires installing a grommet around the sump drain port fitting airframe hole, as specified in a Transport Canada AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2024-20843, retrieved 2026-08-18 · not yet re-verified against the live record
Requires revising the existing Rotorcraft Flight Manual (RFM) for your helicopter.
Full official abstract
Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited (type certificate previously held by Bell Helicopter Textron Canada Limited) Model 505 helicopters. This AD was prompted by the determination that reducing the pressure altitude limitations for certain fuel types is necessary. This AD requires revising the existing Rotorcraft Flight Manual (RFM) for your helicopter. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2021-26605, retrieved 2026-08-18 · not yet re-verified against the live record
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is superseding Airworthiness Directive (AD) 2021-24- 04, which applied to certain Bell Helicopter Textron Canada Limited (type certificate previously held by Bell Helicopter Textron Canada Limited) Model 505 helicopters. AD 2021-24-04 required revising the existing Rotorcraft Flight Manual (RFM) for your helicopter. Since the FAA issued AD 2021-24-04, Bell Textron Canada Limited revised the RFM to incorporate more restrictive operating limitations. This AD is prompted by the determination that the existing altitude limitations were not valid for certain fuel types and that revising the existing RFM for your helicopter to align with the limitations of the Safran Helicopter Engines, S.A. Model ARRIUS 2R engine is necessary. This AD requires revising the existing RFM for your helicopter, as specified in a Transport Canada AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2023-14321, retrieved 2026-08-18 · not yet re-verified against the live record
AD 2022-24-08Published 2022-11-21Effective 2022-12-06
Bell Textron Canada Limited Helicopters
Requires inspecting the collective control system rigging and depending on the results, rigging the collective and cyclic control systems, as specified in a Transport Canada emergency AD, which is incorporated by reference.
Full official abstract
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 505 helicopters. This AD was prompted by the discovery of a potential fouling condition between the rotating swashplate outer ring and the non-rotating collective lever. This AD requires inspecting the collective control system rigging and depending on the results, rigging the collective and cyclic control systems, as specified in a Transport Canada emergency AD, which is incorporated by reference. This AD also requires reporting certain information. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2022-25404, retrieved 2026-08-18 · not yet re-verified against the live record
Requires repetitive FPIs of the pilot collective stick, and requires revising the existing Rotorcraft Flight Manual (RFM) for your helicopter.
Full official abstract
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is superseding Emergency Airworthiness Directive (AD) 2021-05-52 which applied to certain Bell Textron Canada Limited (Bell) Model 505 helicopters. Emergency AD 2021-05-52 required a one-time visual inspection of the pilot collective stick and grip assembly (pilot collective stick), a fluorescent penetrant inspection (FPI) if no crack was found during the visual inspection, and depending on the inspection results, removing the pilot collective stick from service and reporting certain information to Bell. Emergency AD 2021-05-52 also prohibited installing any pilot collective stick on any helicopter unless the inspections had been accomplished. This AD removes the visual inspection of the pilot collective stick, requires repetitive FPIs of the pilot collective stick, and requires revising the existing Rotorcraft Flight Manual (RFM) for your helicopter. This AD retains the reporting requirement and expands the prohibition. This AD was prompted by the determination that visual inspections do not adequately detect a crack and additional findings that a crack may occur sooner than previously expected. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2021-05513, retrieved 2026-08-18 · not yet re-verified against the live record
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is superseding Airworthiness Directive (AD) 2021-06- 06, which applied to certain Bell Textron Canada Limited Model 505 helicopters. AD 2021-06-06 required repetitive fluorescent penetrant inspections (FPIs) of the pilot collective stick and grip assembly and revising the existing Rotorcraft Flight Manual (RFM) for your helicopter. Since the FAA issued AD 2021-06-06, the pilot collective stick and grip assembly has been redesigned. This AD retains certain requirements of AD 2021-06-06, requires modifying your helicopter to include the improved pilot collective stick tube and adds a terminating action for the repetitive FPIs. This AD also prohibits installing any pilot collective stick and grip assembly unless certain requirements of this AD are met. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2022-04159, retrieved 2026-08-18 · not yet re-verified against the live record
AD 2021-26-01Published 2021-12-13Effective 2021-12-28
Bell Textron Canada Limited Helicopters
Requires inspecting the right forward T/R cable and, depending on the results, removing the cable assembly from service.
Full official abstract
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 505 helicopters. This AD was prompted by a report of chafing of the right forward tail rotor (T/R) control cable. This AD requires inspecting the right forward T/R cable and, depending on the results, removing the cable assembly from service. This AD also requires measuring the clearance between the right forward T/R control cable and the roller bracket cut out and, depending on the results, adjusting the height of the roller bracket assembly position. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2021-27008, retrieved 2026-08-18 · not yet re-verified against the live record
AD 2021-16-12Published 2021-09-08Effective 2021-10-13
Bell Textron Canada Limited Helicopters
Requires replacing a certain part- numbered relay panel assembly.
Full official abstract
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 505 helicopters. This AD was prompted by three occurrences of metallic debris in the engine oil lubrication system causing the 12 volts direct current (VDC) reference voltage to be shorted to ground and loss of important flight information to the pilot. This AD requires replacing a certain part- numbered relay panel assembly. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2021-19251, retrieved 2026-08-18 · not yet re-verified against the live record
AD 2021-11-19Published 2021-06-11Effective 2021-07-16
Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters
Requires inspecting the transmission restraint aft attachment hardware installation for a gap and corrective action depending on the inspection results.
Full official abstract
Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters
The FAA is adopting a new airworthiness directive (AD) for Bell Textron Canada Limited (type certificate previously held by Bell Helicopter Textron Canada Limited) (Bell) Model 505 helicopters. This AD was prompted by the discovery of a gap between the transmission restraint assembly aft attachment hardware lower washer and mating airframe truss assembly (truss assembly) clevis lower lug. This AD requires inspecting the transmission restraint aft attachment hardware installation for a gap and corrective action depending on the inspection results. The FAA is issuing this AD to address the unsafe condition on these products.
Source: Federal Register document 2021-12229, retrieved 2026-08-18 · not yet re-verified against the live record
AD 2020-19-05Published 2020-09-23Effective 2020-10-08
Bell Helicopter Textron Canada Limited Helicopters
Requires inspecting each swashplate assembly bearing (bearing), and depending on the inspection results, removing the bearing from service.
Full official abstract
Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Helicopter Textron Canada Limited (Bell) Model 505 helicopters. This AD requires inspecting each swashplate assembly bearing (bearing), and depending on the inspection results, removing the bearing from service. This AD was prompted by a report of a bearing that migrated out of the swashplate inner ring. The actions of this AD are intended to address an unsafe condition on these products.
Source: Federal Register document 2020-20911, retrieved 2026-08-18 · not yet re-verified against the live record