Transportation Department, Federal Aviation Administration
The FAA proposes to supersede an existing airworthiness directive (AD) for Honeywell International Inc. TPE331-10 and TPE331-11 series turboprop engines. That AD currently requires removing certain first stage turbine disks from service. This proposed AD would require the same actions, and would also require performing fluorescent penetrant inspections (FPI) and eddy current inspections (ECI) on certain first stage turbine disks that have a serial number (S/N) listed in this proposed AD. This proposed AD results from our determination that we need to expand the affected population to include other disks from the same heat lot as the failed first stage turbine disk, and that certain inspections are also required. We are proposing this AD to prevent uncontained failure of the first stage turbine disk and damage to the airplane.
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-2009-0555; Directorate Identifier 2009-NE-18-AD] RIN 2120-AA64 AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: The FAA proposes to supersede an existing airworthiness directive (AD) for Honeywell International Inc. TPE331-10 and TPE331-11 series turboprop engines. That AD currently requires removing certain first stage turbine disks from service. This proposed AD would require the same actions, and would also require performing fluorescent penetrant inspections (FPI) and eddy current inspections (ECI) on certain first stage turbine disks that have a serial number (S/N) listed in this proposed AD. This proposed AD results from our determination that we need to expand the affected population to include other disks from the same heat lot as the failed first stage turbine disk, and that certain inspections are also required. We are proposing this AD to prevent uncontained failure of the first stage turbine disk and damage to the airplane. DATES: We must receive any comments on this proposed AD by August 23, 2010. ADDRESSES: Use one of the following addresses to comment on this proposed AD. Federal eRulemaking Portal: Go to http://www.regulations.gov and follow the instructions for sending your comments electronically. Mail: Docket Management Facility, U.S. Department of Transportation, 1200 New Jersey Avenue, SE., West Building Gro…
Other Federal Register documents from the same docket.
Citation: 75 FR 35354
