federal_register: 2012-27169

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document_number title type abstract publication_date pub_year pub_month html_url pdf_url agency_names agency_ids excerpts regulation_id_numbers
2012-27169 Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines Proposed Rule We propose to adopt a new airworthiness directive (AD) for certain serial number Pratt & Whitney Canada Corp. (P&WC) PW206B, PW206B2, PW206C, PW207C, PW207D, PW207D1, PW207D2, and PW207E turboshaft engines. This proposed AD was prompted by the discovery that certain power turbine (PT) disks were made to specific heat codes that may not achieve the maximum in-service life. This proposed AD would require re-identification of the PT disk to a part number (P/N) with a lower life limit. We are proposing this AD to prevent possible uncontained PT disk failure and loss of helicopter control. 2012-11-07 2012 11 https://www.federalregister.gov/documents/2012/11/07/2012-27169/airworthiness-directives-pratt-and-whitney-canada-corp-turboshaft-engines https://www.govinfo.gov/content/pkg/FR-2012-11-07/pdf/2012-27169.pdf Transportation Department; Federal Aviation Administration 492,159 We propose to adopt a new airworthiness directive (AD) for certain serial number Pratt & Whitney Canada Corp. (P&WC) PW206B, PW206B2, PW206C, PW207C, PW207D, PW207D1, PW207D2, and PW207E turboshaft engines. This proposed AD was prompted by the...  

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