Federal Aviation Administration March 22, 2010 – Federal Register Recent Federal Regulation Documents

The FAA proposes to revise an existing airworthiness directive (AD) for Turbomeca Arriel 2B1 turboshaft engines. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: Since the issuance of AD 2007-0126 Turbom[eacute]ca has released modification TU157 which consists in modifying the pressure relief valve of the HMU by introducing a damping device into the valve. Introduction of this device has demonstrated to decrease the pressure fluctuations in the system, therefore reducing significantly the risk of wear of the delta-P diaphragm fabric. This will delete the need for a periodical replacement of the delta-P diaphragm before overhaul of the HMU. The modification TU157 is therefore considered as the terminating action for this AD.

The Federal Aviation Administration (FAA) will hold an informational meeting to discuss the content and comments received regarding proposed advisory circular (AC) 20-42D, Hand Fire Extinguishers for use in Aircraft.