federal_register: 2018-19862
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2018-19862 | Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines | Proposed Rule | We propose to supersede airworthiness directive (AD) 2015-20- 04, which applies to certain Pratt & Whitney Canada Corp. (P&WC) PT6B- 37A turboshaft engines. AD 2015-20-04 requires initial and repetitive inspections until replacement of the No. 10 bearing, and eventual replacement of the No. 9 bearing, both located in the engine reduction gearbox (RGB) assembly. Since we issued AD 2015-20-04, P&WC has determined that the repetitive inspection of the bearings has an associated risk of gearbox damage or contamination and that the bearing installation required by AD 2015-20-04 does not adequately address the issue of bearing axial movement. This proposed AD would require removal from service and replacement of the No. 9 and No. 10 position bearings. We are proposing this AD to address the unsafe condition on these products. | 2018-09-17 | 2018 | 9 | https://www.federalregister.gov/documents/2018/09/17/2018-19862/airworthiness-directives-pratt-and-whitney-canada-corp-turboshaft-engines | https://www.govinfo.gov/content/pkg/FR-2018-09-17/pdf/2018-19862.pdf | Transportation Department; Federal Aviation Administration | 492,159 | We propose to supersede airworthiness directive (AD) 2015-20- 04, which applies to certain Pratt & Whitney Canada Corp. (P&WC) PT6B- 37A turboshaft engines. AD 2015-20-04 requires initial and repetitive inspections until replacement of the No. 10... |