EASA SIB 2012-06R2
Defective Standard Hardware — MS21042, NAS1291 and LN9338 Self-Locking Nuts, and NAS626 Bolts
EASA Safety Information Bulletin 2012-06R2 addresses defective standard hardware, specifically MS21042, NAS1291, and LN9338 self-locking nuts, as well as NAS626 bolts. These defective parts have been installed on various rotorcraft, aeroplanes, appliances, and engines, including Gulfstream 200, GALAXY (Israel Aircraft Industries), and AgustaWestland A109 helicopters. The bulletin provides information on reported occurrences of cracked nuts and broken bolts and highlights ongoing investigations by EASA and other aviation authorities.
Safety Information BulletinMaintenanceSafety MgmtGulfstream 200Israel Aircraft Industries GALAXYAgustaWestland A109