N974RH

01 /  Registration

Filed with the Federal Aviation Administration

Every cell below is a literal field from the FAA Aircraft Registry. Click any value to open the FAA registry record for N974RH.

02 /  NTSB Records

Events on file with the National Transportation Safety Board

03 /  Airworthiness Directives

Applicable to BELL 230

Federal Aviation Administration airworthiness directives matched to make and model. Each entry links to the Federal Register publication.

• Apr 24, 2026

  Airworthiness Directives; B/E Aerospace Fischer GmbH Medical Seats

  The FAA is adopting a new airworthiness directive (AD) for certain B/E Aerospace Fischer GmbH (B/E Aerospace Fischer) Medical Seats 230/305. This AD was prompted by a determination that certain medical seats that are certified for aft facing (AF) and forward facing (FF) installations have been delivered with an incorrect version of the swivel unit. This AD…

  Federal Register →

• Sep 8, 2021

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 206, 206A, 206A-1 (OH-58A), 206B, 206B-1, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, 429, and 430 helicopters. This AD was prompted by a report of a shoulder harness seat belt comfort clip (comfort clip) interfering with the seat belt iner…

  Federal Register →

• Jul 6, 2021

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA proposes to adopt a new airworthiness directive (AD) for Bell Textron Canada Limited (Bell) Model 206, 206A, 206A-1 (OH- 58A), 206B, 206B-1, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, 429, and 430 helicopters. This proposed AD would require removing each shoulder harness seat belt comfort clip (comfort clip) from service, inspecti…

  Federal Register →

• Jun 10, 2021

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA is superseding Airworthiness Directive (AD) 2013-20-13 for certain Bell Helicopter Textron Canada Limited (now Bell Textron Canada Limited) (Bell) Model 206B and 206L helicopters. AD 2013-20-13 required installing a placard beneath the engine power dual tachometer and revising the Operating Limitations section of the existing Rotorcraft Flight Manua…

  Federal Register →

• Mar 11, 2021

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA proposes to supersede Airworthiness Directive (AD) 2013-20-13 for certain Bell Helicopter Textron Canada Limited (now Bell Textron Canada Limited) (Bell) Model 206B and 206L helicopters. AD 2013-20-13 requires installing a placard beneath the engine power dual tachometer and revising the Operating Limitations section of the existing Rotorcraft Fligh…

  Federal Register →

• Oct 31, 2019

  Airworthiness Directives; Various Experimental and Restricted Category Helicopters

  The FAA proposes to adopt a new airworthiness directive (AD) for various helicopters operating under experimental airworthiness certificates and various type certificated restricted category helicopters. This proposed AD was prompted by multiple accidents and incidents involving failure of the tail boom attachment structure and bolts. This proposed AD would…

  Federal Register →

• Apr 25, 2016

  Airworthiness Directives; Bell Helicopter Textron Canada Helicopters

  We are superseding Airworthiness Directive (AD) 2010-19-51 for Bell Helicopter Textron Canada (Bell) Model 222, 222B, 222U, 230, and 430 helicopters. AD 2010-19-51 required inspecting parts of the main rotor hydraulic servo actuator (servo actuator) for certain conditions and replacing any unairworthy parts before further flight. This new AD requires instal…

  Federal Register →

• Jun 16, 2015

  Airworthiness Directives; Bell Helicopter Textron Canada Helicopters

  We are revising an earlier proposed airworthiness directive (AD) for Bell Helicopter Textron Canada (Bell) Model 222, 222B, 222U, 230, and 430 helicopters, which proposed to require replacing certain servo actuators before further flight. The NPRM was prompted by a collective servo actuator malfunction. This action revises the NPRM by adding new actions. Si…

  Federal Register →

• Jun 9, 2015

  Airworthiness Directives; Bell Helicopter Textron Canada Limited

  We are adopting a new airworthiness directive (AD) for certain Bell Helicopter Textron Canada Limited (Bell) Model 206L-1, 206L-3, and 206L-4 helicopters. This AD requires installing a placard and revising the limitations section of the rotorcraft flight manual (RFM). This AD was prompted by several incidents of third stage engine turbine wheel failures cau…

  Federal Register →

• Oct 3, 2014

  Airworthiness Directives; Bell Helicopter Textron Canada Limited

  We are revising and reopening the comment period for an earlier notice of proposed rulemaking (NPRM) for certain Bell Helicopter Textron Canada Limited (Bell) Model 206L-3 and 206L-4 helicopters. The NPRM proposes to require installing a placard and revising the limitations section of the rotorcraft flight manual (RFM). The NPRM was prompted by several inci…

  Federal Register →

• Nov 5, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We are adopting a new airworthiness directive (AD) for certain Bell Model 206B and 206L helicopters. This AD requires installing a placard beneath the engine power dual tachometer and revising the operating limitations section of the rotorcraft flight manual (RFM). This AD was prompted by several incidents of third stage engine turbine wheel failures, which…

  Federal Register →

• Oct 31, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We are adopting a new airworthiness directive (AD) for certain Bell Model 430 helicopters. This AD requires installing a placard on the instrument panel and revising the limitations section of the rotorcraft flight manual (RFM). This AD was prompted by several incidents of third stage engine turbine wheel failures, which were caused by excessive vibrations…

  Federal Register →

• Oct 31, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We are adopting a new airworthiness directive (AD) for Bell Model 230 helicopters. This AD requires installing a placard on the instrument panel and revising the limitations section of the rotorcraft flight manual (RFM). This AD was prompted by several incidents of third stage engine turbine wheel failures, which were caused by excessive vibrations at certa…

  Federal Register →

• Oct 31, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We are adopting a new airworthiness directive (AD) for certain Bell Model 407 helicopters. This AD requires installing a placard beneath the NR/NP dual tachometer and revising the limitations section of the rotorcraft flight manual (RFM). This AD was prompted by several incidents of third stage engine turbine wheel failures, which were caused by excessive v…

  Federal Register →

• Sep 12, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We are adopting a new airworthiness directive (AD) for Bell Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, and 430 helicopters. This AD requires inspecting each bearing to determine if it has been properly staked and replacing the bearing or assembly if it has not been properly staked. This AD was prompted by bearings not be…

  Federal Register →

• Aug 20, 2013

  Airworthiness Directives; Bell Helicopter Textron

  We propose to supersede an existing airworthiness directive (AD) for Bell Helicopter Textron (Bell) Model 222, 222B, 222U, 230, and 430 helicopters. The existing AD currently requires inspecting parts of the main rotor hydraulic servo actuator (servo actuator) for certain conditions and replacing any unairworthy parts before further flight. Since we issued…

  Federal Register →

• Jun 7, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We propose to adopt a new airworthiness directive (AD) for certain Bell Model 206L-3 and 206L-4 helicopters. This proposed AD would require installing a placard beneath the engine power dual tachometer and revising the limitations section of the rotorcraft flight manual (RFM). This proposed AD is prompted by several incidents of third stage engine turbine w…

  Federal Register →

• Jun 7, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We propose to adopt a new airworthiness directive (AD) for certain Bell Model 206B and 206L helicopters. This proposed AD would require installing a placard beneath the engine power dual tachometer and revising the operating limitations section of the rotorcraft flight manual (RFM). This proposed AD is prompted by several incidents of third stage engine tur…

  Federal Register →

• Jun 7, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We propose to adopt a new airworthiness directive (AD) for Bell Model 230 helicopters. This proposed AD would require installing a placard on the instrument panel and revising the limitations section of the rotorcraft flight manual (RFM). This proposed AD is prompted by several incidents of third stage engine turbine wheel failures, which were caused by exc…

  Federal Register →

• Jun 7, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We propose to adopt a new airworthiness directive (AD) for certain Bell Model 430 helicopters. This proposed AD would require installing a placard on the instrument panel and revising the limitations section of the rotorcraft flight manual (RFM). This proposed AD is prompted by several incidents of third stage engine turbine wheel failures, which were cause…

  Federal Register →

• Jun 7, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We propose to adopt a new airworthiness directive (AD) for certain Bell Model 407 helicopters. This proposed AD would require installing a placard beneath the NR/NP dual tachometer and revising the limitations section of the rotorcraft flight manual (RFM). This proposed AD is prompted by several incidents of third stage engine turbine wheel failures, which…

  Federal Register →

• May 13, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Model Helicopters

  We propose to adopt a new airworthiness directive (AD) for Bell Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, and 430 helicopters. This proposed AD would require inspecting each bearing to determine if it has been properly staked and replacing the bearing or assembly if it has not been staked properly. This proposed AD is p…

  Federal Register →

• Jul 19, 2012

  Airworthiness Directives; Bell Helicopter Textron Canada Helicopters

  We are adopting an airworthiness directive (AD) superseding an existing airworthiness directive for Bell Helicopter Textron Canada (Bell) Model 407 and 427 helicopters. The existing AD requires inspecting certain hydraulic servo actuators (servo) to determine whether the shaft turns independently of the nut or the clevis assembly, and additional actions bas…

  Federal Register →

• Oct 27, 2011

  Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Model 407 and 427 Helicopters

  This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2011-15-51, which was sent previously to all known U.S. owners and operators of the specified Bell Model 407 and 427 helicopters by individual letters. This AD requires inspecting certain hydraulic servo actuators to determine whether the shaft turns independe…

  Federal Register →

• Mar 10, 2011

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (BHTC) Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, and 430 Helicopters

  This document publishes in the Federal Register an amendment adopting Emergency Airworthiness Directive (AD) 2010-26-51, which was sent previously to all known U.S. owners and operators of the specified model helicopters by individual letters. This AD also supersedes existing AD 2009-08-03. This AD is prompted by another incident in which the tail rotor bla…

  Federal Register →

• Nov 24, 2010

  Airworthiness Directives; Bell Helicopter Textron Canada Model 222, 222B, 222U, 230, and 430 Helicopters

  This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2010-19-51, which was sent previously to all known U.S. owners and operators of the specified model Bell Helicopter Textron Canada (Bell) helicopters by individual letters. This AD requires inspecting parts of the main rotor hydraulic servo actuator (servo act…

  Federal Register →

• Jun 11, 2010

  Airworthiness Directives; Bell Helicopter Textron Canada Model 222, 222B, 222U, 230, and 430 Helicopters

  This amendment supersedes an existing airworthiness directive (AD) for the specified Bell Helicopter Textron Canada (BHTC) helicopters, that currently requires certain checks and inspections of the tail rotor blades. If a crack is found, the existing AD requires replacing the tail rotor blade (blade) with an airworthy blade before further flight. This amend…

  Federal Register →

• Apr 9, 2009

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, and 430 Helicopters

  We are adopting a superseding airworthiness directive (AD) for the specified Bell Helicopter Textron Canada Limited (BHTC) Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, and 430 helicopters. That AD currently requires replacing each affected tail rotor blade (blade) with an airworthy blade that has a serial number not listed…

  Federal Register →

• Sep 11, 2008

  Airworthiness Directives; Bell Helicopter Textron Canada Model 222, 222B, 222U, 230, and 430 Helicopters

  We are superseding an existing airworthiness directive (AD) for Bell Helicopter Textron Canada (Bell) Model 222, 222B, 222U, 230, and 430 helicopters. That AD currently requires visually inspecting the main rotor hydraulic actuator support (support) to verify the presence of all dowel pins and sealant between the support and transmission and verifying the p…

  Federal Register →

• Aug 11, 2008

  Airworthiness Directives; Bell Helicopter Textron Canada (BHTC) Model 230 Helicopters

  We are adopting a new airworthiness directive (AD) for BHTC Model 230 helicopters. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of Canada which indicates that the existing rigging procedures for the tail rotor pitch change mechanism have to be changed due to the possibility of parts interference…

  Federal Register →

• Jul 28, 2008

  Airworthiness Directives; Bell Helicopter Textron Canada Model 222, 222B, 222U, 230, and 430 Helicopters

  This document proposes superseding an existing airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) helicopters. That AD currently requires certain checks and inspections of the tail rotor blades. If a crack is found, the existing AD requires replacing the tail rotor blade (blade) with an airworthy blade before further flight. This action…

  Federal Register →

• Jul 10, 2008

  Airworthiness Directives; Bell Helicopter Textron Canada Model 222, 222B, 222U, 230 and 430 Helicopters

  This amendment adopts a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 222, 222B, 222U, 230 and 430 helicopters that requires rewiring and testing the fuel valve switch on each engine and testing the ignitor system. This amendment is prompted by an in-flight incident in which a fuel valve switch failed, causing the fuel val…

  Federal Register →

• Apr 23, 2008

  Airworthiness Directives; Bell Helicopter Textron Canada (BHTC) Model 230 Helicopters

  We propose to adopt a new airworthiness directive (AD) for BHTC Model 230 helicopters. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The aviation authority of Canada, with which we have a bilateral…

  Federal Register →

• Apr 23, 2008

  Airworthiness Directives; Bell Helicopter Textron Canada Model 222, 222B, 222U, 230, and 430 Helicopters

  This document proposes superseding an existing airworthiness directive (AD) for Bell Helicopter Textron Canada (Bell) Model 222, 222B, 222U, 230, and 430 helicopters. That AD currently requires visually inspecting the main rotor hydraulic actuator support (support) to verify the presence of all dowel pins and sealant between the support and transmission and…

  Federal Register →

• Jan 23, 2008

  Airworthiness Directives; Bell Helicopter Textron Canada Model 222, 222B, 222U, 230 and 430 Helicopters

  This document proposes adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 222, 222B, 222U, 230 and 430 helicopters. This proposal would require rewiring and testing the fuel valve switch on each engine and testing the ignitor system. This proposal is prompted by an in-flight incident in which a fuel valve switch fail…

  Federal Register →

• Nov 20, 2007

  Airworthiness Directives; Bell Helicopter Textron, Inc. Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412EP, and 412CF Helicopters

  This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2007-19-53, which was sent previously to all known U.S. owners and operators of the specified Bell Helicopter Textron, Inc. (BHTI) model helicopters by individual letters. This AD requires replacing each affected tail rotor blade (blade) with an airworthy blad…

  Federal Register →

• Nov 20, 2007

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, and 430 Helicopters

  This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2007-19-52, which was sent previously to all known U.S. owners and operators of the specified Bell Helicopter Textron Canada Limited (BHTC) model helicopters by individual letters. This AD requires replacing each affected tail rotor blade (blade) with an airwo…

  Federal Register →

• Sep 28, 2006

  Airworthiness Directives; Rolls-Royce Corporation Models 250-C30, 250-C40, and 250-C47 Series Turboshaft Engines

  The FAA is adopting a new airworthiness directive (AD) for Rolls-Royce Corporation (RRC) models 250-C30, 250-40, and 250-C47 series turboshaft engines with a third-stage turbine wheel, part number (P/N) 6898663 or P/N 23065843 installed, or a fourth-stage turbine wheel, P/N 6892764 or P/N 23066744, installed. This AD adds an additional life limit for third-…

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• Aug 3, 2006

  Airworthiness Directives; Rolls-Royce Corporation (Formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) (RRC) 250-B and 250-C Series Turboshaft and Turboprop Engines

  The FAA is superseding an existing airworthiness directive (AD) for RRC 250-B and 250-C series turboshaft and turboprop engines. That AD currently requires a onetime inspection of the fuel nozzle screen for contamination, and if contamination is found, inspection and cleaning of the entire aircraft fuel system before further flight. That AD also requires re…

  Federal Register →

• Jun 26, 2006

  Airworthiness Directives; Bell Helicopter Textron Canada Model 222, 222B, 222U, 230, and 430 Helicopters

  This amendment adopts a new airworthiness directive (AD) for the specified Bell Helicopter Textron Canada (BHTC) model helicopters. This action requires initial and repetitive inspections of each tail rotor counterweight bellcrank (bellcrank) with a specified part number and serial number. If external damage, a crack, roughness, or looseness between the bea…

  Federal Register →

• Jan 25, 2006

  Airworthiness Directives; Rolls-Royce Corporation (Formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) Models 250-C30, 250-C40, and 250-C47 Series Turboshaft Engines

  The FAA proposes to adopt a new airworthiness directive (AD) for Rolls-Royce Corporation (formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) (RRC) models 250-C30, 250-40, and 250-C47 series turboshaft engines. This proposed AD would add an additional life limit for third- and fourth-stage turbine wheels. This proposed…

  Federal Register →

• Oct 18, 2005

  Airworthiness Directives; Rolls-Royce Corporation (Formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) (RRC) 250-B and 250-C Series Turboshaft and Turboprop Engines

  The FAA proposes to supersede an existing airworthiness directive (AD) for certain RRC 250-B and 250-C series turboshaft and turboprop engines. That AD currently requires a onetime inspection of the fuel nozzle screen for contamination, and if contamination is found, inspection and cleaning of the entire aircraft fuel system before further flight. That AD a…

  Federal Register →

• Oct 3, 2005

  Airworthiness Directives; Rolls-Royce Corporation (RRC) (formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) Models 250-C28, -C28B, and -C28C Turboshaft Engines

  The FAA is adopting a new airworthiness directive (AD) for Rolls-Royce Corporation (formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) (RRC) Models 250-C28, - C28B, and -C28C turboshaft engines. This AD requires a onetime visual inspection of the seal joint in each passage between airfoils at the hub and shroud of thi…

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• May 18, 2005

  Airworthiness Directives; Rolls-Royce Corporation (Formerly Allison Engine Company) 250-B17B, -B17C, -B17D, -B17E, -C20, -C20B, -C20F, -C20J, -C20S, and -C20W Turboprop and Turboshaft Engines

  The FAA is adopting a new airworthiness directive (AD) for Rolls- Royce Corporation (RRC) (formerly Allison Engine Company) 250-B17B, - B17C, -B17D, -B17E, -C20, -C20B, -C20F, -C20J, -C20S, and -C20W turboprop and turboshaft engines that do not have turbine energy absorbing ring, RRC part number (P/N) 23035175, or an equivalent FAA- approved serviceable tur…

  Federal Register →

• Feb 17, 2005

  Airworthiness Directives; Bell Helicopter Textron Canada Model 222, 222B, 222U, 230, and 430 Helicopters

  This amendment supersedes an existing airworthiness directive (AD) for the specified Bell Helicopter Textron Canada (BHTC) model helicopters that currently requires certain checks and inspections of the tail rotor blades. If a crack is found, the existing AD requires replacing the tail rotor blade (blade) with an airworthy blade before further flight. This…

  Federal Register →

• Feb 11, 2005

  Airworthiness Directives; Bell Helicopter Textron, A Division of Textron Canada Model 222, 222B, 222U and 230 Helicopters

  This amendment supersedes an existing airworthiness directive (AD) for Bell Helicopter Textron, A Division of Textron Canada (BHTC) Model 222, 222B, 222U, and 230 helicopters, that currently requires a visual check of each main rotor grip (grip) and pitch horn assembly without disassembling the main rotor hub assembly (hub assembly), and a visual inspection…

  Federal Register →

04 /  Service Difficulty Reports

FAA SDR filings

The FAA does not currently expose a public API for Service Difficulty Reports. We do not back-fill or paraphrase. Search the FAA SDR portal directly →

05 /  Sources & Methodology

Every fact on this page links to its primary US-government source

• FAA Aircraft Registry →

  Refreshed May 5, 2026

  Available

• NTSB CAROL →

  Refreshed May 5, 2026

  Available

• Federal Register (FAA Airworthiness Directives) →

  Refreshed May 5, 2026

  Available

• FAA Service Difficulty Reports →

  Refreshed May 5, 2026

  Unavailable

We render only what the agency publishes. Found a factual error? Report it → We acknowledge within 5 business days and resolve within 14.