Source: https://www.federalregister.gov/documents/2012/12/10/2012-28173/airworthiness-directives-embraer-sa-airplanes
Timestamp: 2017-11-24 08:39:16
Document Index: 318036569

Matched Legal Cases: ['art 39', 'art 2', 'art 2', '§\u200939', 'art 2', 'art 2', 'art 2', 'art 2', 'art 2', 'art 2', 'art 2', 'art 2']

73270-73273 (4 pages)
Amendment 39-17265
AD 2012-23-09
Request To Incorporate New and Revised Structural Airworthiness Limitations
(g) Restated Actions: Revision and Compliance Times
https://www.federalregister.gov/d/2012-28173 https://www.federalregister.gov/d/2012-28173
The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of July 6, 2010 (75 FR 30277, June 1, 2010).
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to the specified products. That NPRM was published in the Federal Register on June 6, 2012 (77 FR 33334), and proposed to supersede AD 2010-11-14, Amendment 39-16319 (75 FR 30277, June 1, 2010). That NPRM proposed to correct an unsafe condition for the specified products. The MCAI states:
Since this condition may occur in other airplanes of the same type and affects flight safety, a corrective action is required. Thus, sufficient reason exists to request compliance with this [Agência Nacional de Aviação Civil (ANAC)] AD in the indicated time limit.
Embraer requested that we include EMBRAER Temporary Revision (TR) 5-5, dated May 24, 2012; and EMBRAER TR 5-7, dated August 12, 2012; to Appendix A, Part 2, Airworthiness Limitation Inspections (ALI)—Structures, of the EMBRAER 190 MRBR, MRB-1928, in the operators' maintenance programs. Embraer points out that those TRs include additional maintenance tasks that were approved in recent design changes, which identify and mitigate potential premature structural cracks.
We disagree. There have been numerous changes to the structural inspection requirements intended to identify potential premature cracks since the last structural airworthiness limitations (EMBRAER TR 2-5, dated December 6, 2007; and EMBRAER TR 2-6, dated February 12, 2008; to Appendix A, Part 2, Airworthiness Limitation Inspections (ALI) -Structures, of the EMBRAER 190 MRBR, MRB-1928 were mandated in FAA AD 2010-11-14, Amendment 39-16319 (75 FR 30277, June 1, 2010).
The requested changes would alter the actions currently required by this AD, so additional rulemaking would be required. We find that delaying this action would be inappropriate in light of the identified unsafe condition.
In addition, we have contacted the ANAC, the aviation authority for Brazil. ANAC has indicated it intends to mandate the maintenance actions in Appendix A, Parts I, II, and IV of EMBRAER 190 MRBR, MRB-1928, Revision 5, dated November 11, 2010; including EMBRAER TR 5-3, dated November 11, 2010; and EMBRAER TR 5-6, dated November 11, 2010, in addition to the TRs referred to by the commenter. These new maintenance actions include certification maintenance requirements (CMRs) and life-limited parts, in addition to the structural inspections from the TRs referred to by the commenter. As we stated previously, we consider that to delay this AD action would be inappropriate, since we have determined that an unsafe condition exists. When ANAC issues mandatory continued airworthiness instructions that encompass all appropriate airworthiness limitations, including the commenter's recommended action, we might consider additional rulemaking. We have not changed the AD in this regard.
We have deleted Note 1 to paragraph (g)(1) of the NPRM (77 FR 33334, June 6, 2012). Instead, we have added the same information in paragraph (g)(2) of this AD.
We also revised the compliance times specified in table 1 to paragraph (g)(1) of this AD to correctly identify the effective date of AD 2010-11-14, Amendment 39-16319 (75 FR 30277, June 1, 2010).
Are consistent with the intent that was proposed in the NPRM (77 FR 33334, June 6, 2012) for correcting the unsafe condition; and
Do not add any additional burden upon the public than was already proposed in the NPRM (77 FR 33334, June 6, 2012).
We estimate that this AD will affect about 88 products of U.S. registry.
The actions that are required by AD 2010-11-14, Amendment 39-16319 (75 FR 30277, June 1, 2010), and retained in this AD take about 1 work-hour per product, at an average labor rate of $85 per work-hour. Based on these figures, the estimated cost of the currently required actions is $85 per product.
We estimate that it will take about 1 work-hour per product to comply with the new basic requirements of this AD. The average labor rate is $85 per work-hour. Based on these figures, we estimate the cost of this AD to the U.S. operators to be $7,480, or $85 per product.
You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Operations office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains the NPRM (77 FR 33334, June 6, 2012), the regulatory evaluation, any comments received, and other information. The street address for the Docket Operations office (telephone (800) 647-5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt.
2. The FAA amends § 39.13 by removing airworthiness directive (AD) 2010-11-14, Amendment 39-16319 (
2012-23-09 Embraer S.A.: Amendment 39-17265. Docket No. FAA-2012-0590; Directorate Identifier 2011-NM-112-AD.
This AD was prompted by reports of cracks in some of the structural components of the airplane. We are issuing this AD since failure to inspect these structural components according to the new airworthiness limitation section (ALS) tasks, thresholds, and intervals could prevent a timely detection of fatigue cracking, which if not properly addressed, could result in reduced structural integrity of the airplane.
This paragraph restates the actions required by paragraph (f) of AD 2010-11-14, Amendment 39-16319 (75 FR 30277, June 1, 2010).
(1) Within 90 days after July 6, 2010 (the effective date of AD 2010-11-14, Amendment 39-16319 (75 FR 30277, June 1, 2010)), revise the ALS of the Instructions for Continued Airworthiness (ICA) to include the tasks specified in table 1 to paragraph (g)(1) of this AD. These tasks are identified in EMBRAER Temporary Revision (TR) 2-5, dated December 6, 2007; and EMBRAER TR 2-6, dated February 12, 2008; to Appendix A, Part 2, Airworthiness Limitation Inspections (ALI) -Structures, of the EMBRAER 190 Maintenance Review Board Report (MRBR), MRB-1928.
Table 1 to Paragraph (g)(1) of This AD—MRBR TRs and Tasks, With Compliance Times
TR 2-5, dated December 6, 2007 Wing stub main box lower skin and splices—internal 57-01-002-0002 250 flight cycles after July 6, 2010 (the effective date of AD 2010-11-14, Amendment 39-16319 (75 FR 30277, June 1, 2010)).
TR 2-5, dated December 6, 2007 Wing stub spar 3—internal/external 57-01-008-0003 500 flight cycles after July 6, 2010 (the effective date of AD 2010-11-14, Amendment 39-16319 (75 FR 30277, June 1, 2010)).
TR 2-5, dated December 6, 2007 Wing stub spar 3—external 57-01-008-0004 500 flight cycles after July 6, 2010 (the effective date of AD 2010-11-14, Amendment 39-16319 (75 FR 30277, June 1, 2010)).
TR 2-5, dated December 6, 2007 Wing lower skin panel stringers—internal 57-10-007-0004 500 flight cycles after July 6, 2010 (the effective date of AD 2010-11-14, Amendment 39-16319 (75 FR 30277, June 1, 2010)).
TR 2-5, dated December 6, 2007 Wing main box rib 11—internal 57-10-012-0003 500 flight cycles after July 6, 2010 (the effective date of AD 2010-11-14, Amendment 39-16319 (75 FR 30277, June 1, 2010)).
TR 2-6, dated February 12, 2008 Nose landing gear wheel well metallic structure 53-10-021-0004 500 flight cycles after July 6, 2010 (the effective date of AD 2010-11-14, Amendment 39-16319 (75 FR 30277, June 1, 2010)).
(2) The actions required by paragraph (g)(1) of this AD may be done by inserting a copy of EMBRAER TR 2-5, dated December 6, 2007; and EMBRAER TR 2-6, dated February 12, 2008; to Appendix A, Part 2, Airworthiness Limitation Inspections (ALI) -Structures, of the EMBRAER 190 MRBR, MRB-1928, into the ALS of the EMBRAER 190 MRBR, MRB-1928. When these TRs have been included in general revisions of the EMBRAER 190 MRBR, MRB-1928, the general revisions may be inserted, provided the relevant information in the general revision is identical to that in EMBRAER TR 2-5, dated December 6, 2007; and EMBRAER TR 2-6, dated February 12, 2008, and these TRs may be removed.
(3) The initial compliance times for the tasks specified in EMBRAER TR 2-5, dated December 6, 2007; and EMBRAER TR 2-6, dated February 12, 2008; to Appendix A, Part 2, Airworthiness Limitation Inspections (ALI)—Structures, of the EMBRAER 190 MRBR, MRB-1928; start at the later of the times specified in paragraphs (g)(3)(i) and (g)(3)(ii) of this AD. For certain tasks, the compliance times depend on the pre-modification and post-modification condition of the associated service bulletin, as specified in the “Applicability” column of these TRs.
(i) Within the applicable threshold times specified in the TRs specified in table 1 to paragraph (g)(1) of this AD.
(ii) At the applicable compliance time specified in table 1 to paragraph (g)(1) of this AD.
(iii) Thereafter, except as provided in paragraphs (h) and (j) of this AD, no alternative replacement times or structural inspection intervals may be approved for the tasks specified in the TRs specified in table 1 to paragraph (g)(1) of this AD.
Refer to MCAI Brazilian Airworthiness Directive 2011-05-04, effective June 16, 2011, and the service information specified in paragraphs (k)(1) through (k)(4) of this AD, for related information.
(1) EMBRAER Temporary Revision (TR) 2-5, dated December 6, 2007, to Appendix A, Part 2—Airworthiness Limitation Inspections (ALI)—Structures, of the EMBRAER 190 Maintenance Review Board Report, MRB-1928.
(2) EMBRAER TR 2-6, dated February 12, 2008, to Appendix A, Part 2—Airworthiness Limitation Inspections (ALI)—Structures, of the EMBRAER 190 Maintenance Review Board Report, MRB-1928.
(3) The following service information was approved for IBR on January 14, 2013.
(i) EMBRAER Temporary Revision (TR) 5-1, dated February 11, 2011, to Part 2—Airworthiness Limitation Inspections (ALI)—Structures, of Appendix A, Airworthiness Limitations (AL), of the EMBRAER 190 Maintenance Review Board Report, MRB-1928, Revision 5, dated November 11, 2010.
(ii) Appendix A, Airworthiness Limitation (AL), of the EMBRAER 190 Maintenance Review Board Report, MRB-1928, Revision 5, dated November 11, 2010.
(4) The following service information was approved for IBR on July 6, 2012 (75 FR 30277, June 1, 2010).
(i) EMBRAER TR 2-5, dated December 6, 2007, to Appendix A, Part 2—Airworthiness Limitation Inspections (ALI)—Structures of the EMBRAER 190 Maintenance Review Board Report, MRB-1928.
(ii) EMBRAER TR 2-6, dated February 12, 2008, to Appendix A, Part 2—Airworthiness Limitation Inspections (ALI)—Structures of the EMBRAER 190 Maintenance Review Board Report, MRB-1928.
[FR Doc. 2012-28173 Filed 12-7-12; 8:45 am]