federal_register: E8-18811

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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
E8-18811 Airworthiness Directives; Pratt & Whitney (P&W) PW4000 Series 94-Inch Fan Turbofan Engines Proposed Rule The FAA proposes to adopt a new airworthiness directive (AD) for P&W PW4052, PW4056, PW4060, PW4062, PW4152, PW4156A, PW4158, PW4460, and PW4462 turbofan engines. This proposed AD would require a onetime visual inspection of all EEC-131 model electronic engine controls (EECs). This proposed AD would require the EECs to be identified, categorized by group number, marked, and replaced using a fleet management plan. This proposed AD results from a report of an uncommanded engine in-flight shutdown due to defective EEC pulse width modulator (PWM) microcircuits. We are proposing this AD to prevent uncommanded in-flight engine shutdowns which could result in loss of thrust and prevent continued safe flight or landing. 2008-08-14 2008 8 https://www.federalregister.gov/documents/2008/08/14/E8-18811/airworthiness-directives-pratt-and-whitney-pandw-pw4000-series-94-inch-fan-turbofan-engines https://www.govinfo.gov/content/pkg/FR-2008-08-14/pdf/E8-18811.pdf Transportation Department; Federal Aviation Administration 492,159 The FAA proposes to adopt a new airworthiness directive (AD) for P&W PW4052, PW4056, PW4060, PW4062, PW4152, PW4156A, PW4158, PW4460, and PW4462 turbofan engines. This proposed AD would require a onetime visual inspection of all EEC-131 model...  

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