AD 97-15-05 Amendment 39-10078

This amendment adopts a new airworthiness directive (AD) that is applicable to certain British Aerospace (Jetstream) Model 4101 airplanes. This action requires an inspection to determine the data on the label of certain hose assemblies, and replacement of all hose assemblies from any discrepant batch with certain new hose assemblies. This amendment is prompted by a report of failure of a hose assembly in the fire extinguisher system of the engine nacelle due to cracks, caused during manfacture of the hose assemblies, in the swaged ferrule that attaches the hose to the end fitting. The actions specified in this AD are intended to ensure that such discrepant hose assemblies are replaced. Discrepant hose assemblies could fail and consequently prevent the proper distribution of fire extinguishing agent within the engine nacelle in the event of a fire.