federal_register: 2012-12354
Data license: Public Domain (U.S. Government data) · Data source: Federal Register API & Regulations.gov API
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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2012-12354 | Airworthiness Directives; Agusta S.p.A. Helicopters | Proposed Rule | We propose to adopt a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model A109E and Model A109S helicopters with certain lower semichannel assemblies installed. This proposed AD results from reported cases of damage to the main drive shaft caused by improperly secured metallic spacers on some A109 model helicopters. This proposed AD would require a one-time inspection of the lower semichannel assemblies to determine if metallic spacers are installed. If the metallic spacers are installed, this proposed AD would require an inspection for the correct installation of the metallic spacers on the semichannels and for the correct seating of the gaskets. If the metallic spacers are not installed with rivets, the lower semichannel assemblies would be required to be modified, and the main drive shaft would be inspected for damage. The actions specified by this proposed AD are intended to detect missing spacer rivets, which could allow the metallic spacers to rotate and lead to damage and failure of the main drive shaft, and subsequent loss of helicopter control. | 2012-05-22 | 2012 | 5 | https://www.federalregister.gov/documents/2012/05/22/2012-12354/airworthiness-directives-agusta-spa-helicopters | https://www.govinfo.gov/content/pkg/FR-2012-05-22/pdf/2012-12354.pdf | Transportation Department; Federal Aviation Administration | 492,159 | We propose to adopt a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model A109E and Model A109S helicopters with certain lower semichannel assemblies installed. This proposed AD results from reported cases of damage to the main drive... |