N50RP

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 N50RP.

02 /  NTSB Records

Events on file with the National Transportation Safety Board

03 /  Airworthiness Directives

Applicable to BELL 427

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

• Dec 12, 2025

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited (Bell) Model 427 helicopters. This AD was prompted by a report of a cracked transmission oil check valve (check valve). This AD requires inspecting and measuring certain check valves and, depending on the results, repetitively inspecting and removing the check val…

  Federal Register →

• Aug 5, 2025

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA proposes to adopt a new airworthiness directive (AD) for certain Bell Textron Canada Limited (Bell) Model 427 helicopters. This proposed AD was prompted by a report of a cracked transmission oil check valve (check valve). This proposed AD would require inspecting and measuring certain check valves and, depending on the results, repetitively inspecti…

  Federal Register →

• Jun 23, 2025

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA is adopting a new airworthiness directive (AD) for all Bell Textron Canada Limited (BTCL) Model 407 and 427 helicopters. This AD was prompted by a report that certain expandable blade bolts installed on the main rotor blade may not have received the correct heat treatment, which could result in stress corrosion cracking of the expandable blade bolts…

  Federal Register →

• Dec 13, 2021

  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 re…

  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 →

• Dec 6, 2019

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters

  The FAA is adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (BHTC) Model 427 helicopters. This AD requires inspecting the inboard skin of the vertical fin around the four tailboom attachment points. This AD was prompted by reports of cracked vertical fin skins that resulted from metal fatigue. The actions of this AD are…

  Federal Register →

• May 20, 2019

  Airworthiness Directives; Bell Helicopter Textron, Inc. (Bell) Helicopters

  We are superseding Airworthiness Directive (AD) 2018-17-01 for Bell Model 212, 412, 412CF, and 412EP helicopters. AD 2018-17-01 required replacing certain oil and fuel check valves and prohibited installing these valves on any helicopter. This AD retains the requirements of AD 2018-17-01 but expands those requirements for all model helicopters. This AD was…

  Federal Register →

• Oct 23, 2018

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters

  We are superseding Airworthiness Directive (AD) 2017-13-03 for Bell Helicopter Textron Canada Limited (Bell) Model 429 helicopters. AD 2017-13-03 required adding an identification number to life-limited rod ends that do not have a serial number (S/N). Since we issued AD 2017- 13-03, an additional life-limited rod end was identified that is affected by the s…

  Federal Register →

• Aug 21, 2018

  Airworthiness Directives; Bell Helicopter Textron, Inc. (Bell) Helicopters

  We are superseding Airworthiness Directive (AD) 2017-15-02 for Bell Model 212 and 412 helicopters. AD 2017-15-02 required replacing certain oil and fuel check valves and prohibited installing them on any helicopter. This AD retains the requirements of AD 2017-15-02 and adds certain model helicopters to the applicability. This AD was prompted by the discover…

  Federal Register →

• Jun 1, 2018

  Airworthiness Directives; Bell Helicopter Textron Canada Helicopters

  We propose to adopt a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 427 helicopters. This proposed AD would require inspecting the inboard skin of the vertical fin around the four tailboom attachment points. This proposed AD is prompted by reports of cracked vertical fin skins that resulted from metal fatigue. The actions…

  Federal Register →

• Apr 5, 2018

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters

  We propose to supersede Airworthiness Directive (AD) 2017-13- 03 for Bell Helicopter Textron Canada Limited (Bell) Model 429 helicopters. AD 2017-13-03 requires adding an identification number to life-limited rod ends that do not have a serial number (S/N). Since we issued AD 2017-13-03, an additional life-limited rod end was identified that is affected by…

  Federal Register →

• Jan 11, 2018

  Airworthiness Directives; Air Comm Corporation Air Conditioning Systems

  We propose to adopt a new airworthiness directive (AD) for Air Comm Corporation (Air Comm) air conditioning systems installed on various model helicopters. This proposed AD would require replacing electrical connectors and would prohibit the installation of other parts. This proposed AD is prompted by reports of overheated connectors. The proposed actions a…

  Federal Register →

• Jul 20, 2017

  Airworthiness Directives; Bell Helicopter Textron, Inc. (Bell) Helicopters

  We are adopting a new airworthiness directive (AD) for Bell Model 212 and Model 412 helicopters. This AD requires replacing certain oil and fuel check valves and prohibits installing them on any helicopter. This AD is prompted by a report of cracked or leaking check valves. These actions are intended to address an unsafe condition on these helicopters.

  Federal Register →

• Jun 22, 2017

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters

  We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (Bell) Model 429 helicopters. This AD requires adding an identification number to life-limited rod ends that do not have a serial number (S/N). The actions of this AD are intended to address an unsafe condition on these products.

  Federal Register →

• Feb 17, 2017

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters

  We propose to adopt a new airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (Bell) Model 429 helicopters. This proposed AD would require adding an identification number to life- limited rod ends that do not have a serial number (S/N). The proposed actions are intended to address an unsafe condition on these products.

  Federal Register →

• Sep 30, 2016

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

  We are adopting a new airworthiness directive (AD) for Bell Model 427 and Model 429 helicopters. This AD requires replacing certain engine and transmission oil check valves. This AD also prohibits installing the affected check valves on any helicopter. This AD is prompted by a report of several cracked or leaking check valves. These actions are intended to…

  Federal Register →

• Aug 20, 2015

  Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Helicopters

  We are superseding Airworthiness Directive (AD) 2001-13-51 for Bell Model 206L-4, 407, and 427 helicopters. AD 2001-13-51 required inspecting certain driveshafts for a crack, a loose bolt or nut, or red powder residue and replacing a driveshaft if there is a crack, a loose bolt or nut, or red powder residue. AD 2001-13-51 also required notifying the FAA wit…

  Federal Register →

• Sep 15, 2014

  Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Helicopters

  We propose to supersede airworthiness directive (AD) 2001-13- 51 for Bell Model 206L-4, 407, and 427 helicopters. AD 2001-13-51 currently requires inspecting certain driveshafts for a crack, a loose bolt or nut, or red powder residue and replacing a driveshaft if there is a crack, a loose bolt or nut, or red powder residue. AD 2001-13-51 also requires notif…

  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 →

• 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 →

• May 25, 2012

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters

  We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (BHTC) Model 427 helicopters which requires replacing certain tailboom attachment hardware and at certain intervals thereafter, determining the torque of that tailboom attachment hardware. This AD was prompted by a review of the tailboom attachment installation, wh…

  Federal Register →

• Feb 3, 2012

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters

  We propose to adopt a new airworthiness directive (AD) for the Bell Helicopter Textron Canada Limited (BHTC) Model 427 helicopters. This proposed AD is prompted by a review of the tailboom attachment installation, which revealed that the torque value of the bolts specified in the BHTC Model 427 Maintenance Manual and applied during manufacturing was incorre…

  Federal Register →

• Dec 13, 2011

  Airworthiness Directives; Apical Industries, Inc., (Apical) Emergency Float Kits

  This amendment adopts a new airworthiness directive (AD) for the Apical emergency float kits installed on certain model helicopters under supplemental type certificates. This AD requires adding placards on each side of the fuselage to identify the location and operation of the liferaft external inflation handle. This AD also requires replacing each liferaft…

  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 Model 427 Helicopters

  We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

  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 →

• Dec 7, 2010

  Airworthiness Directives; Apical Industries Inc. (Apical) Emergency Float Kits

  This document proposes adopting a new airworthiness directive (AD) for the Apical emergency float kits installed on certain model helicopters under supplemental type certificates. This proposal would require adding placards on each side of the fuselage to identify the location and operation of the liferaft external inflation handle. The proposal would also…

  Federal Register →

• Aug 30, 2010

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Model 427 Helicopters

  We propose to adopt a new airworthiness directive (AD) for the products listed above. 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 MCAI describes the unsafe condition as:

  Federal Register →

• Dec 11, 2009

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

  We are adopting a new airworthiness directive (AD) for the BHTC Model 407 and Model 427 helicopters. This AD results from mandatory continuing airworthiness information (MCAI) ADs issued by the aviation authority of Canada. The MCAI ADs state that some hydraulic pump driveshaft assemblies may have been delivered with a missing internal plug or fastening riv…

  Federal Register →

• Oct 30, 2009

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

  We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada (Bell) Model 407 and 427 helicopters. This AD results from a mandatory continuing airworthiness information (MCAI) AD issued by the aviation authority of Canada. The MCAI AD states that, during a preflight check, it was observed that the swashplate link assembly bearing ha…

  Federal Register →

• Aug 3, 2009

  Airworthiness Directives; Bell Helicopter Textron Canada Model 427 Helicopters

  We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 427 helicopters. This AD results from mandatory continuing airworthiness information (MCAI) originated by the aviation authority of Canada to identify and correct an unsafe condition on an aviation product. Transport Canada, the aviation authority of Canada, w…

  Federal Register →

• Apr 16, 2009

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Model 206A Series, 206B Series, 206L Series, 407, and 427 Helicopters

  This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2009-07-52 and supersedes Emergency AD 2009-07-51, issued March 17, 2009, which was sent previously to all known U.S. owners and operators of Bell Helicopter Textron Canada Limited (Bell) Model 206A series, 206B series, 206L series, 407, and 427 helicopters by…

  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 →

• Mar 23, 2009

  Airworthiness Directives; Bell Helicopter Textron Canada Model 427 Helicopters

  We propose to adopt a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 427 helicopters. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by the aviation authority of Canada to identify and correct an unsafe condition on an aviation product. Transport Canada, the aviation authority…

  Federal Register →

• Feb 20, 2009

  Airworthiness Directives; Pratt & Whitney Canada PW206A, PW206B, PW206B2, PW206C, PW206E, PW207C, PW207D, and PW207E Turboshaft Engines

  We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

  Federal Register →

• Jun 25, 2008

  Airworthiness Directives; Pratt & Whitney Canada PW206A, PW206B, PW206B2, PW206C, PW206E, PW207C, PW207D, and PW207E Turboshaft Engines

  We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

  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 →

• Jul 19, 2004

  Airworthiness Directives; Pratt & Whitney Canada PW206B, PW206C, PW206E, PW207D, and PW207E Turboshaft Engines

  The FAA is adopting a new airworthiness directive (AD) for Pratt & Whitney Canada (PWC) PW206B engines that have incorporated PWC Service Bulletin (SB) No. 28119, and PW206C, PW206E, PW207D, and PW207E turboshaft engines. This AD requires checking the automatic low-cycle- fatigue (LCF) counting data made by the engine Data Collection Unit (DCU) on installed…

  Federal Register →

• Feb 28, 2003

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Model 427 Helicopters

  This amendment adopts a new airworthiness directive (AD) for the specified Bell Helicopter Textron Canada (Bell) model helicopters that requires modifying the auxiliary fin assemblies and revising the Limitations section of the Rotorcraft Flight Manual (RFM) to reduce the never-exceed speed (Vne) for a tail rotor pedal stop failure. This amendment is prompt…

  Federal Register →

• Feb 28, 2003

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

  This amendment adopts a new airworthiness directive (AD) for the specified Bell model helicopters that requires replacing the hydraulic solenoid tee fitting (tee fitting) and tubes. This amendment is prompted by the manufacturer's discovery that tee fittings may be installed improperly and restrict hydraulic fluid flow. The actions specified by this AD are…

  Federal Register →

• Oct 18, 2002

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Model 427 Helicopters

  This document revises an earlier proposed airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (Bell) Model 427 helicopters that would have required modifying each auxiliary fin (fin) by relocating the upper tuning weights to a lower position. That proposal was prompted by several incidents of main rotor blades contacting the top of the f…

  Federal Register →

• Oct 18, 2002

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Model 427 Helicopters

  This document proposes adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (Bell) Model 427 helicopters. This proposal would require replacing the hydraulic solenoid tee fitting (tee fitting) and tubes. This proposal is prompted by the manufacturer's discovery that tee fittings may be installed improperly and restrict hydr…

  Federal Register →

• Nov 28, 2001

  Airworthiness Directives; Bell Helicopter Textron Canada Model 427 Helicopters

  This document proposes adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 427 helicopters. This proposal would require modifying each auxiliary fin (fin) by relocating the upper tuning weights to a lower position. This proposal is prompted by several incidents of main rotor blades contacting the top of the fin. The u…

  Federal Register →

• Sep 21, 2001

  Airworthiness Directives; Bell Helicopter Textron Canada Model 206L-4, 407, and 427 Helicopters

  This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2001-13-51, which was sent previously to all known U.S. owners and operators of Bell Helicopter Textron Canada (BHTC) Model 206L-4, 407, and 427 helicopters by individual letters. This AD requires visually inspecting certain driveshafts for a crack, a loose bo…

  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.