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 2007_register executive 2014-05-29 article Proposed Rules D09002ee1c80a871f D09002ee1c80a87b8 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 adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (BHTC) Model 206A and 206B helicopters, serial numbers (S/N) 0004 through 3906, with two- piece vertical stabilizer (fin) supports (fin supports) installed. This proposal would require inserting a revision into the applicable maintenance manual, verifying the torque on the fin support attachment hardware, inspecting the fin support bracket and vertical fin for paint or gaps, and inspecting the fin support bracket for cracking, and if a crack is found, replacing the two-piece vertical fin support with a one-piece casting support. This proposal is prompted by an accident in which the fin supports failed. The actions specified by this proposed AD are intended to detect improper torque of the fin support attachment hardware, gaps between the fin support bracket and the doubler, painted mating surfaces of the fin supports, vertical fin, and vertical fin inserts (fin inserts), and cracking in the fin supports, to prevent the vertical fin from rotating into the tail rotor, separation of the tail rotor, and subsequent loss of control of the helicopter. 72 FR 38527 https://www.govinfo.gov/app/details/FR-2007-07-13/E7-13607 E7-13607 fr13jy07-23 RIN 2120-AA64 4910-13-P Docket No. FAA-2007-28690 Directorate Identifier 2006-SW-21-AD https://www.govinfo.gov/app/details/FR-2007-07-13/E7-13607 https://www.govinfo.gov/content/pkg/FR-2007-07-13/html/E7-13607.htm https://www.govinfo.gov/content/pkg/FR-2007-07-13/pdf/E7-13607.pdf Air Transportation Aircraft Aviation Safety Safety 3 p. 38527 38529 72 FR 38527 Title 14 Part 39 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Bell Helicopter Textron Canada Limited Model 206A and 206B Helicopters; Federal Register Vol. 72, Issue PRORULE E7-13607 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 2007-09-11 Docket No. FAA-2007-28690 Directorate Identifier 2006-SW-21-AD 4910-13-P E7-13607 Notice of proposed rulemaking (NPRM).

This document proposes adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (BHTC) Model 206A and 206B helicopters, serial numbers (S/N) 0004 through 3906, with two- piece vertical stabilizer (fin) supports (fin supports) installed. This proposal would require inserting a revision into the applicable maintenance manual, verifying the torque on the fin support attachment hardware, inspecting the fin support bracket and vertical fin for paint or gaps, and inspecting the fin support bracket for cracking, and if a crack is found, replacing the two-piece vertical fin support with a one-piece casting support. This proposal is prompted by an accident in which the fin supports failed. The actions specified by this proposed AD are intended to detect improper torque of the fin support attachment hardware, gaps between the fin support bracket and the doubler, painted mating surfaces of the fin supports, vertical fin, and vertical fin inserts (fin inserts), and cracking in the fin supports, to prevent the vertical fin from rotating into the tail rotor, separation of the tail rotor, and subsequent loss of control of the helicopter.

Comments must be received on or before September 11, 2007. Sharon Miles, Aviation Safety Engineer, FAA, Rotorcraft Directorate, Regulations and Policy Group, Fort Worth, Texas 76193-0111, telephone (817) 222-5122, fax (817) 222- 5961. Air Transportation Aircraft Aviation Safety Safety Airworthiness directives: Bell Helicopter Textron Canada Ltd., http://dms.dot.gov http://www.regulations.gov Vol. 72, no. 134 Office of the Federal Register, National Archives and Records Administration 2007-07-13 continuing daily deposited born digital 293 p. Table of Contents: AE 2.7: GS 4.107: AE 2.106: KF70.A2 https://www.govinfo.gov/app/details/FR-2007-07-13 P0b002ee1892c72fe 0097-6326 0042-1219 0364-1406 769-004-00000-9 000582072 f:fr13jy07 https://www.govinfo.gov/app/details/FR-2007-07-13 https://www.govinfo.gov/content/pkg/FR-2007-07-13/pdf/FR-2007-07-13.pdf https://www.govinfo.gov/content/pkg/FR-2007-07-13/xml/FR-2007-07-13.xml fdlp 38463 38745 DGPO 2014-05-29 2024-06-05 FR-2007-07-13 machine generated eng FR FR-2007-07-13 72 134