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 2013_register executive 2013-03-22 article Rules and Regulations D09002ee1c7fbb63a D09002ee1c7fbb73c 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 We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron, Inc. (Bell), Model 412 and 412EP helicopters. This AD requires establishing a lower life limit on certain swashplate outer ring assemblies (outer ring), revising the retirement life on the components' history card or equivalent record, and revising the maintenance manual or Instructions for Continued Airworthiness (ICA). This AD also prohibits installing these outer rings on any helicopter. This AD was prompted by reports of cracking in the outer rings. The actions are intended to prevent failure of an outer ring because of cracking, which could lead to the loss of main rotor (M/R) blade pitch control and subsequent loss of helicopter control. 78 FR 17593 https://www.govinfo.gov/app/details/FR-2013-03-22/2013-05875 2013-05875 fr22mr13-2 RIN 2120-AA64 4910-13-P Docket No. FAA-2012-1016 Directorate Identifier 2010-SW-009-AD Amendment 39-17386 AD 2013-05-14 https://www.govinfo.gov/app/details/FR-2013-03-22/2013-05875 https://www.govinfo.gov/content/pkg/FR-2013-03-22/html/2013-05875.htm https://www.govinfo.gov/content/pkg/FR-2013-03-22/pdf/2013-05875.pdf Air Transportation Aircraft Aviation Safety Incorporation by Reference Safety 2 p. 17593 17594 78 FR 17593 Title 14 Part 39 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Bell Helicopter Textron, Inc.; Federal Register Vol. 78, Issue RULE 2013-05875 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 2013-04-26 Docket No. FAA-2012-1016 Directorate Identifier 2010-SW-009-AD Amendment 39-17386 AD 2013-05-14 4910-13-P 2013-05875 Final rule.

We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron, Inc. (Bell), Model 412 and 412EP helicopters. This AD requires establishing a lower life limit on certain swashplate outer ring assemblies (outer ring), revising the retirement life on the components' history card or equivalent record, and revising the maintenance manual or Instructions for Continued Airworthiness (ICA). This AD also prohibits installing these outer rings on any helicopter. This AD was prompted by reports of cracking in the outer rings. The actions are intended to prevent failure of an outer ring because of cracking, which could lead to the loss of main rotor (M/R) blade pitch control and subsequent loss of helicopter control.

This AD is effective April 26, 2013. Michael Kohner, Aviation Safety Engineer, Rotorcraft Certification Office, Rotorcraft Directorate, FAA, 2601 Meacham Blvd., Fort Worth, TX 76137; telephone (817) 222-5447; email 7-avs-asw-170@faa.gov. Air Transportation Aircraft Aviation Safety Incorporation by Reference Safety Airworthiness Directives: Bell Helicopter Textron, Inc. , 7-avs-asw-170@faa.gov http://www.bellcustomer.com/files/ http://www.regulations.gov Vol. 78, no. 56 Office of the Federal Register, National Archives and Records Administration 2013-03-22 continuing daily deposited born digital 284 p. Table of Contents: AE 2.7: GS 4.107: AE 2.106: KF70.A2 https://www.govinfo.gov/app/details/FR-2013-03-22 P0b002ee183f4fd17 0097-6326 0042-1219 0364-1406 769-004-00000-9 000582072 f:fr22mr13 https://www.govinfo.gov/app/details/FR-2013-03-22 https://www.govinfo.gov/content/pkg/FR-2013-03-22/pdf/FR-2013-03-22.pdf https://www.govinfo.gov/content/pkg/FR-2013-03-22/xml/FR-2013-03-22.xml fdlp 17591 17864 DGPO 2013-03-22 2024-06-03 FR-2013-03-22 machine generated eng FR FR-2013-03-22 78 56