United States Government Publishing Office publisher pbl distributor dst United States National Archives and Records Administration Office of the Federal Register author aut Government Organization text government publication eng FR Regulatory Information 2001_register executive 2010-09-24 article Proposed Rules D09002ee1c81dee10 D09002ee1c81deeb2 United States Department of Transportation originator org United States Government Agency or Subagency United States Federal Aviation Administration originator org United States Government Agency or Subagency This document proposes superseding an existing airworthiness directive (AD) for Bell Helicopter Textron, Inc. (BHTI) Model 47B, 47B- 3, 47D, 47D-1, 47G, 47G-2, 47G2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-4, 47G-4A, 47G-5, 47G-5A, 47H-1, 47J, 47J-2, 47J-2A, and 47K helicopters. That AD currently requires either recurring liquid penetrant or eddy current inspections of the main rotor blade grip (grip) threads for a crack. If a crack is detected, that AD requires, before further flight, replacing the cracked grip with an airworthy grip. That AD also establishes a retirement life of 1200 hours time-in-service (TIS) for each grip. This AD contains the same requirements but adds two part numbers (P/N) to the applicability and requires only recurring eddy current inspections of the grip threads. This AD also requires reporting any results of the grip inspections to the FAA Rotorcraft Certification Office. This proposal is prompted by the results of an accident investigation, an operator survey conducted by a trade association, various comments concerning the current AD, and a further analysis of field service data. The actions specified by this AD are intended to prevent failure of a grip, loss of a main rotor blade, and subsequent loss of control of the helicopter. 66 FR 17105 https://www.govinfo.gov/app/details/FR-2001-03-29/01-7741 01-7741 fr29mr01-19 RIN 2120-AA64 4910-13-U Docket No. 2001-SW-13-AD https://www.govinfo.gov/app/details/FR-2001-03-29/01-7741 https://www.govinfo.gov/content/pkg/FR-2001-03-29/html/01-7741.htm https://www.govinfo.gov/content/pkg/FR-2001-03-29/pdf/01-7741.pdf Air Transportation Aircraft Aviation Safety Safety 11 p. 17105 17115 66 FR 17105 Title 14 Part 39 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Bell Helicopter Textron, Inc. Model 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, 47G2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-4, 47G-4A, 47G-5, 47G-5A, 47H-1, 47J, 47J-2, 47J-2A, and 47K Helicopters; Federal Register Vol. 66, Issue PRORULE 01-7741 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 2001-05-29 Docket No. 2001-SW-13-AD 4910-13-U 01-7741 Notice of proposed rulemaking.

This document proposes superseding an existing airworthiness directive (AD) for Bell Helicopter Textron, Inc. (BHTI) Model 47B, 47B- 3, 47D, 47D-1, 47G, 47G-2, 47G2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-4, 47G-4A, 47G-5, 47G-5A, 47H-1, 47J, 47J-2, 47J-2A, and 47K helicopters. That AD currently requires either recurring liquid penetrant or eddy current inspections of the main rotor blade grip (grip) threads for a crack. If a crack is detected, that AD requires, before further flight, replacing the cracked grip with an airworthy grip. That AD also establishes a retirement life of 1200 hours time-in-service (TIS) for each grip. This AD contains the same requirements but adds two part numbers (P/N) to the applicability and requires only recurring eddy current inspections of the grip threads. This AD also requires reporting any results of the grip inspections to the FAA Rotorcraft Certification Office. This proposal is prompted by the results of an accident investigation, an operator survey conducted by a trade association, various comments concerning the current AD, and a further analysis of field service data. The actions specified by this AD are intended to prevent failure of a grip, loss of a main rotor blade, and subsequent loss of control of the helicopter.

Comments must be received on or before May 29, 2001. Marc Belhumeur, Aviation Safety Engineer, FAA, Rotorcraft Directorate, Rotorcraft Certification Office, Fort Worth, Texas 76193-0170, telephone (817) 222-5177, fax (817) 222- 5783. Air Transportation Aircraft Aviation Safety Safety Airworthiness directives: Bell, 9-asw-adcomments@faa.gov www.metchemtesting.com Vol. 66, no. 61 Office of the Federal Register, National Archives and Records Administration 2001-03-29 continuing daily deposited born digital 257 p. Table of Contents: AE 2.7: GS 4.107: AE 2.106: KF70.A2 https://www.govinfo.gov/app/details/FR-2001-03-29 P0b002ee180a1b8a8 0097-6326 0042-1219 0364-1406 769-004-00000-9 000582072 f:fr29mr01 https://www.govinfo.gov/app/details/FR-2001-03-29 https://www.govinfo.gov/content/pkg/FR-2001-03-29/pdf/FR-2001-03-29.pdf https://www.govinfo.gov/content/pkg/FR-2001-03-29/xml/FR-2001-03-29.xml fdlp 17073 17320 DGPO 2010-09-24 2024-06-08 FR-2001-03-29 machine generated eng FR FR-2001-03-29 66 61