2020-05996

Document Headings Document headings vary by document type but may contain the following: • the agency or agencies that issued and signed a document • the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to • the agency docket number / agency internal file number • the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Department of Transportation Federal Aviation Administration • 14 CFR Part 39 • [Docket No. FAA-2017-1125; Product Identifier 2017-SW-078-AD; Amendment 39-19880; AD 2020-06-11] • RIN 2120-AA64 AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: The FAA is adopting a new airworthiness directive (AD) for MD Helicopters Inc. (MDHI) Model 600N helicopters. This AD requires establishing a life limit for the main rotor (M/R) blade upper control collective/longitudinal link assembly (link assembly). This AD was prompted by the discovery that the life limit was omitted from the maintenance manual. The actions of this AD are intended to prevent an unsafe condition on these products. DATES: This AD is effective April 28, 2020. ADDRESSES: For service information related to this final rule, contact MD Helicopters, Inc., Attn: Customer Support Division, 4555 E. McDowell Rd., Mail Stop M615, Mesa, AZ 85215-9734; telephone 1-800-388-3378; fax 480-346-6813; or at https://www.mdhelicopters.com. You may review this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N-321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call 817-222-5110. Examining the AD Docket You may examine the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2017-1125; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this AD, any comments received, and other information. The street address for Docket Operations is U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Payman Soltani, Aerospace Engineer, Airframe Section, Los Angeles ACO Branch, Compliance and Airworthiness Division, FAA, 3960 Paramount Blvd., Lakewood, California 90712; telephone 562-627-5313; email payman.soltani@faa.gov. SUPPLEMENTARY INFORMATION: Discussion The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to MDHI Model 600N helicopters with a yaw stability augmentation system and with an M/R link assembly part number (P/N) 600N7617-1 installed. The NPRM published in the Federal Register on September 10, 2018 (83 FR 45580). The NPRM was prompted by a report from MDHI that during a review of the Airworthiness Limitations section of the applicable maintenance manual, MDHI discovered that it did not include a life limit for link assemblies installed on MDHI Model 600N helicopters with a yaw stability augmentation system. Link assembly P/N 600N7617-1, which is made of aluminum, is a life-limited part with a life limit of 15,000 hours time-in-service (TIS). MDHI subsequently revised the Airworthiness Limitations section of the maintenance manual to include the life limit. The NPRM proposed to require creating a component history card or equivalent record for each affected link assembly, if one does not exist, and recording a life limit of 15,000 hours TIS. This NPRM also proposed to require determining the hours TIS of the link assembly and removing the link assembly from service acc…

Fonte: Federal Register (federalregister.gov). Texto original em inglês. Conteúdo sanitizado por segurança.