Regulacje i polityka gospodarcza · 12.09.2016

Airworthiness Directives; Embraer S.A. Airplanes

We are revising an earlier proposed airworthiness directive (AD) for certain Embraer S.A. Model ERJ 170 airplanes. The NPRM proposed to supersede AD 2012-07-08, which requires revising the maintenance or inspection program to incorporate structural inspection requirements. The NPRM was prompted by a determination that more restrictive maintenance requirements and airworthiness limitations are necessary. Since the NPRM was issued, a new revision of the airworthiness limitations section (ALS) of the EMBRAER S.A. ERJ 170/175 Maintenance Review Board Report (MRBR) was issued, which contains more restrictive airworthiness limitations. This action revises the NPRM by proposing to require revising the maintenance or inspection program, as applicable, to incorporate the new ALS of the MRBR. This supplemental NPRM (SNPRM) would also remove certain airplanes from the applicability. In addition, we propose to supersede AD 2006-06-09, AD 2012-05-08, and AD 2012-07-08, which require tasks that are now included in the new revision of the MRBR. We are proposing this SNPRM to detect and correct fatigue cracking of various principal structural elements; such cracking could result in reduced structu