Airworthiness Directives; Rolls-Royce Corporation Models 250-C30, 250-C40, and 250-C47 Series Turboshaft Engines
airworthiness · Rule · Final rule. · Published 2006-09-28 · Effective 2006-11-02 · 71 FR 56864
Document
Document number
06-8230
Federal Register citation
71 FR 56864
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2006-09-28
Effective date
2006-11-02
FAA docket
Docket No. FAA-2005-23392
Abstract
The FAA is adopting a new airworthiness directive (AD) for Rolls-Royce Corporation (RRC) models 250-C30, 250-40, and 250-C47 series turboshaft engines with a third-stage turbine wheel, part number (P/N) 6898663 or P/N 23065843 installed, or a fourth-stage turbine wheel, P/N 6892764 or P/N 23066744, installed. This AD adds an additional life limit for third- and fourth-stage turbine wheels. This AD results from analysis by RRC of failures of third-stage turbine wheels. We are issuing this AD to prevent loss of power, possible engine shutdown, or uncontained engine failure.