Safety Publications Tool
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2012-06R2 : Defective Standard Hardware – MS21042, NAS1291 and LN9338 Self-Locking Nuts, and NAS626 Bolts
EASA approval number
EASA Rotorcraft Section
/ Type Designation
Safety Information Bulletin
Revision 2 is issued to include references to additional relevant documents. Please note that, although Transport Canada CASA-2013-04 refers to particular lots of defective nuts manufactured by Airfasco, other lots and other parts manufacturers might be affected.
Publication(s) and related information
- CAA Israel AD 57-10-06-18, dated 27 July 2010. - Gulfstream Aerospace LP Service Bulletin (SB) 200-51-366, dated 30 March 2010. - AgustaWestland Information Letter GEN-11-024, dated 20 July 2011. - Bell Helicopter Textron Operation Safety Notice GEN-11-43 Revision A, dated 16 September 2011. - Robinson Helicopter Co. Service Letters R22 SL-58, R44 SL- 38 and R66 SL-01 (single document), dated 18 August 2011. - L-3 Communications, Aviation Recorder Alert Bulletins FA2100CVDR SB 015, dated 10 January 2011, FA2100CVR SB 018, dated 14 January 2011 and FA2100FDR SB 020, dated 14 January 2011. - CASA Australia Airworthiness Bulletin (AWB) 14-002, dated 12 October 2011. - CAA New Zealand Continuing Airworthiness Notice 14-001, dated 2 December 2011. - Australian Transportation Safety Board (ATSB) Investigation Report AO-2011-016, dated 30 April 2012. - Airfasco Industries “Technical Quality Notice Bulletin MS21042 & NAS1291 450 F Steel” dated 20 August 2012, which is attached as pages 6 through 9 of this SIB. - United Kingdom Ministry of Defence Report 1710NAS/ 04/130855/20298.2 “Investigation into the Conformity to Specification of Aerospace Nuts”, dated 3 September 2013. - Transport Canada Civil Aviation Safety Alert (CASA) 2013-04, dated 9 September 2013. - EASA AD 2013-0225-E, dated 20 September 2013.
Comments regarding this safety information should be referred to the Safety Information Section, Certification Directorate, EASA;
ADs [at] easa.europa [dot] eu
SIB_201206_R2_Defective_Standard_Hardware.pdf (700 kb)
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