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 2000_register executive 2010-09-23 article Rules and Regulations D09002ee1c81ebd40 D09002ee1c81ebe04 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 publishes in the Federal Register an amendment adopting superseding Airworthiness Directive (AD) 2000-18-51 which was sent previously to all known U.S. owners and operators of 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 by individual letters. This AD requires recurring liquid penetrant or eddy current inspections of the main rotor blade grip (grip) threads for a crack. If a crack is detected, this AD requires, before further flight, replacing the cracked grip with an airworthy grip. This AD also establishes a retirement life of 1,200 hours time- in-service (TIS) for each grip. This amendment is prompted by the results of an investigation of an August 1998 accident in which a grip failed on a BHTI Model 47G-2 helicopter due to a fatigue crack. An analysis of the field service data revealed fatigue cracks in 70 percent of the grips inspected. 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. 65 FR 68884 https://www.govinfo.gov/app/details/FR-2000-11-15/00-29049 00-29049 fr15no00-8 RIN 2120-AA64 4910-13-U Docket No. 2000-SW-35-AD Amendment 39-11983 AD 2000-18-51 https://www.govinfo.gov/app/details/FR-2000-11-15/00-29049 https://www.govinfo.gov/content/pkg/FR-2000-11-15/html/00-29049.htm https://www.govinfo.gov/content/pkg/FR-2000-11-15/pdf/00-29049.pdf Air Transportation Aircraft Aviation Safety Safety 2 p. 68884 68885 65 FR 68884 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. 65, Issue RULE 00-29049 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 2000-11-30 Docket No. 2000-SW-35-AD Amendment 39-11983 AD 2000-18-51 4910-13-U 00-29049 Final rule; request for comments.

This document publishes in the Federal Register an amendment adopting superseding Airworthiness Directive (AD) 2000-18-51 which was sent previously to all known U.S. owners and operators of 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 by individual letters. This AD requires recurring liquid penetrant or eddy current inspections of the main rotor blade grip (grip) threads for a crack. If a crack is detected, this AD requires, before further flight, replacing the cracked grip with an airworthy grip. This AD also establishes a retirement life of 1,200 hours time- in-service (TIS) for each grip. This amendment is prompted by the results of an investigation of an August 1998 accident in which a grip failed on a BHTI Model 47G-2 helicopter due to a fatigue crack. An analysis of the field service data revealed fatigue cracks in 70 percent of the grips inspected. 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.

Effective November 30, 2000, to all persons except those persons to whom it was made immediately effective by Emergency AD 2000-18-51, issued on August 31, 2000, which contained the requirements of this amendment. 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 Vol. 65, no. 221 Office of the Federal Register, National Archives and Records Administration 2000-11-15 continuing daily deposited born digital 376 p. Table of Contents: AE 2.7: GS 4.107: AE 2.106: KF70.A2 https://www.govinfo.gov/app/details/FR-2000-11-15 P0b002ee1809ec6d3 0097-6326 0042-1219 0364-1406 769-004-00000-9 000582072 f:fr15no00 https://www.govinfo.gov/app/details/FR-2000-11-15 https://www.govinfo.gov/content/pkg/FR-2000-11-15/pdf/FR-2000-11-15.pdf https://www.govinfo.gov/content/pkg/FR-2000-11-15/xml/FR-2000-11-15.xml fdlp 68871 69236 DGPO 2010-09-23 2024-06-08 FR-2000-11-15 machine generated eng FR FR-2000-11-15 65 221