Federal Aviation Administration November 4, 2005 – Federal Register Recent Federal Regulation Documents

The FAA proposes to adopt a new airworthiness directive (AD) for Turbomeca Arriel 1B, 1D and 1D1 turboshaft engines. This proposed AD would require inspecting the 2nd stage nozzle guide vanes (NGV2) for wall thickness. This proposed AD results from one instance of a fractured 2nd stage turbine blade followed by an uncommanded engine shutdown. We are proposing this AD to detect and prevent perforation of the NGV2 that could cause fracture of a turbine blade that could result in an uncommanded engine in-flight shutdown.

This notice announces the availability of and requests comments on a proposed advisory circular (AC) that provides methods acceptable to the Administrator related to the proposed certification requirements for performance and handling characteristics of transport category airplanes affected by flight in the icing conditions defined in appendix C of Title 14, Code of Federal Regulations (CFR) part 25. This notice is necessary to give all interested persons an opportunity to present their views on the proposed AC.