pdf Gfa ad 670 Cancelled 2018.09.13 Popular

IGNITION – MAGNETO FLYWHEEL HUB WASHER – REPLACEMENT

CANCELLED Refer EASA AD 2011-0067-E

During a production process review, a deviation in hardening of certain Part Number (P/N) 944072 washers has been detected, which exceeds the hardness of the design specification. The affected washers are part of the magneto ring flywheel hub installation and have been installed on a limited number of engines. No defective washers have been shipped as spare parts. This condition, if not corrected, could lead to cracks in the washer, loosening of the magneto flywheel hub and consequent ignition failure, possibly resulting in damage to the engine, in- flight engine shutdown and forced landing, damage to the aeroplane and injury to occupants. For the reasons described above, this AD requires, for the affected engines, the replacement of the P/N 944072 washer and associated gasket ring P/N 950141 with serviceable parts, having the same P/N. This AD also prohibits installation of an affected engine on an aeroplane, unless the washer on that engine has been replaced as required by this AD. BRP-Powertrain Mandatory SB-912-058 and SB-914-041 (same document) dated 15 April 2011. The use of later approved revisions of this document is acceptable for compliance with the requirements of this AD.