Source: https://www.federalregister.gov/documents/2011/12/29/2011-33279/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-airplanes
Timestamp: 2017-11-22 02:36:44
Document Index: 111354021

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

76 FR 81894
81894-81897 (4 pages)
Docket No. FAA-2011-1325
Directorate Identifier 2010-NM-250-AD
2011-33279
FAA-2011-1325
Restatement of Requirements of AD 2010-11-13, Amendment 39-16318 (75 FR 30284, June 1, 2010):
(h) No Alternative Inspections for Paragraph (g) of This AD
(i) Revision of the Maintenance Program
(j) No Alternative Actions Intervals, and/or Critical Design Configuration Control Limitations (CDCCLs)
https://www.federalregister.gov/d/2011-33279 https://www.federalregister.gov/d/2011-33279
For service information identified in this proposed AD, contact Empresa Brasileira de Aeronautica S.A. (EMBRAER), Technical Publications Section (PC 060), Av. Brigadeiro Faria Lima, 2170-Putim-12227-901 São Jose dos Campos-SP-BRASIL; telephone +55 12 3927-5852 or +55 12 3309-0732; fax +55 12 3927-7546; email: distrib@embraer.com.br; Internet: http://www.flyembraer.com. You may review copies of the referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. For information on the availability of this material at the FAA, call (425) 227-1221.
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 this proposed AD, the regulatory evaluation, any comments received, and other information. The Start Printed Page 81895street 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.
Cindy Ashforth, Aerospace Engineer, International Branch, ANM-116, Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, Washington 98057-3356; telephone (425) 227-2768; fax (425) 227-1320.
We invite you to send any written relevant data, views, or arguments about this proposed AD. Send your comments to an address listed under the ADDRESSES section. Include “Docket No. FAA-2011-1325; Directorate Identifier 2010-NM-250-AD” at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD based on those comments.
On May 14, 2010, we issued AD 2010-11-13, Amendment 39-16318 (75 FR 30284, June 1, 2010). That AD required actions intended to address an unsafe condition on the products listed above.
Since we issued AD 2010-11-13, Amendment 39-16318 (75 FR 30284, June 1, 2010): The Agência Nacional de Aviação Civil (ANAC), which is the aviation authority for Brazil, has issued Brazilian Airworthiness Directive 2011-04-01, dated May 5, 2011 (referred to after this as “the MCAI”), to correct an unsafe condition for the specified products. The MCAI states:
During the airplane full scale fatigue test, cracks were found in some structural components of the airplane. Analysis of these cracks resulted in modifications on the Airworthiness Limitation Section (ALS) of Embraer ERJ 170 Maintenance Review Board Report (MRBR), to include new inspections tasks or modification of existing ones and its respective thresholds and intervals.
Failure to inspect these structural components, according to the new/revised tasks, thresholds and intervals, could prevent a timely detection of fatigue cracking. These cracks, if not properly addressed, could adversely affect the structural integrity of the airplane.
The required action is revising the maintenance program to incorporate new structural inspection requirements. You may obtain further information by examining the MCAI in the AD docket.
EMBRAER has issued Part 2—Airworthiness Limitation Inspection (ALI)—Structures, of Appendix A, Airworthiness Limitations of the EMBRAER 170 Maintenance Review Board Report (MRBR) MRB-1621, Appendix A, Part 2, Airworthiness Limitations, Revision 7, dated November 11, 2010; and Temporary Revision (TR) 7-1, dated February 11, 2011, to Part 2—Airworthiness Limitation Inspection (ALI)—Structures, of Appendix A, Airworthiness Limitations of the EMBRAER 170 MRBR MRB-1621, Revision 7, dated November 11, 2010. The actions described in this service information are intended to correct the unsafe condition identified in the MCAI.
Based on the service information, we estimate that this proposed AD would affect about 166 products of U.S. registry.
The actions that are required by AD 2010-11-13, Amendment 39-16318 (75 FR 30284, June 1, 2010) and retained in this proposed 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 would take about 1 work-hour per product to comply with the new basic requirements of this proposed AD. The average labor rate is $85 per work-hour. Based on these figures, we estimate the cost of the proposed AD on U.S. operators to be $14,110, or $85 per product.
Start Printed Page 81896 Authority: 49 U.S.C. 106(g), 40113, 44701.
2. The FAA amends § 39.13 by removing Amendment 39-16318 (75 FR 30284, June 1, 2010) and adding the following new AD:
Empresa Brasileira de Aeronautica S.A. (EMBRAER): Docket No. FAA-2011-1325; Directorate Identifier 2010-NM-250-AD.
This AD supersedes AD 2010-11-13, Amendment 39-16318 (75 FR 30284, June 1, 2010)
This AD applies to all Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170-100 LR, -100 STD, -100 SE, and -100 SU airplanes; and Model ERJ 170-200 LR, -200 SU, and -200 STD airplanes; certificated in any category.
This AD requires revisions to certain operator maintenance documents to include new actions (e.g., inspections). Compliance with these actions is required by 14 CFR 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by these inspections, the operator may not be able to accomplish the actions described in the revisions. In this situation, to comply with 14 CFR 91.403(c), the operator must request approval for an alternative method of compliance according to paragraph (k) of this AD. The request should include a description of changes to the required inspections that will ensure the continued damage tolerance of the affected structure. The FAA has provided guidance for this determination in Advisory Circular (AC) 25.1529-1A.
Air Transport Association (ATA) of America Code 53: Fuselage; 57: Wings.
This AD was prompted by cracks found in certain structural components during full scale fatigue testing of the airplane. Analysis of these cracks resulted in manufacturer modifications of the ALS of Embraer ERJ 170 Maintenance Review Board Report (MRBR), which include new inspections tasks, or modification of the current tasks and their respective thresholds and intervals. We are issuing this AD to detect and correct fatigue cracking which could result in the loss of structural integrity of the airplane.
Within 90 days after July 6, 2010 (the effective date of AD 2010-11-13, Amendment 39-16318 (75 FR 30284, June 1, 2010)), revise the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness (ICA) to incorporate the inspection tasks identified in the EMBRAER temporary revisions (TRs) to Appendix A—Part 2 of the EMBRAER 170 Maintenance Review Board Report (MRBR) MRB-1621 listed in table 1 of this AD. The initial compliance times for the tasks start from the applicable threshold times specified in the TRs for the corresponding tasks of the maintenance review board report or within 500 flight cycles after July 6, 2010, whichever occurs later. For certain tasks, the compliance times depend on the pre-modification and post-modification status of the actions specified in the associated service bulletin, as specified in the “Applicability” column of the applicable TRs identified in table 1 of this AD. The threshold values stated in the TRs referenced in table 1 of this AD are total flight cycles on the airplane since the date of issuance of the original Brazilian airworthiness certificate or the date of issuance of the original Brazilian export certificate of airworthiness.
Table 1—Inspection Tasks
TR 4-1 October 15, 2007 Ram air turbine compartment, support structure and cutout structure-internal Nose landing gear wheel well metallic structure 53-10-012-0002 53-10-012-0003 53-10-021-0005 53-10-021-0006
TR 4-3 December 6, 2007 Wing stub spar 3 side fitting—internal Wing upper skin panels—external Fixed trailing edge lower skin panel—external Fixed trailing edge rib 4A—external Fixed trailing edge rib 6—internal 57-01-012-001 57-10-010-0002 57-50-002-0002 57-50-005-0003 57-50-005-0004
Except as required by paragraph (i) of this AD, after accomplishing the actions specified in paragraph (g) of this AD, no alternative inspections or inspection intervals may be used unless the inspection or inspection interval is approved by the Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, or the Agência Nacional de Aviação Civil (ANAC) (or its delegated agent); or unless the inspection or interval is approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (k)(1) of this AD.
Within 60 days after the effective date of this AD: Revise the maintenance program to incorporate the new or revised tasks specified in Part 2—Airworthiness Limitation Inspection (ALI)—Structures, of Appendix A, Airworthiness Limitations of the EMBRAER 170 MRBR MRB-1621, Appendix A, Part 2, Airworthiness Limitations, Revision 7, dated November 11, 2010; and Temporary Revision (TR) 7-1, dated February 11, 2011, to Part 2—Airworthiness Limitation Inspection (ALI)—Structures, of Appendix A, Airworthiness Limitations of the EMBRAER 170 MRBR MRB-1621, Revision 7, dated November 11, 2010, with the initial compliance times and intervals stated in these documents. The initial compliance times for the tasks start from the date of issuance of the original Brazilian airworthiness certificate or the date of issuance of the original Brazilian export certificate of airworthiness of the applicable airplane at the applicable time specified in the tasks, or within 600 flight cycles after revising the maintenance program, whichever occurs later. For certain tasks, the compliance times depend on the pre-modification and post-modification status of the actions specified in the associated service bulletin, as specified in the “Applicability” column of Part 2—Airworthiness Limitation Inspection (ALI)—Structures, of Appendix A, Airworthiness Limitations of the EMBRAER 170 MRBR MRB-1621, Appendix A, Part 2, Airworthiness Limitations, Revision 7, dated November 11, 2010; and Temporary Revision (TR) 7-1, dated February 11, 2011, to Part 2—Airworthiness Limitation Inspection (ALI)—Structures, of Appendix A, Airworthiness Limitations of the EMBRAER 170 MRBR MRB-1621, Revision 7, dated November 11, 2010. For tasks identified in the documents identified in this paragraph, doing the initial task required by this paragraph terminates the requirements of paragraph (g) of this AD for that task.Start Printed Page 81897
After accomplishing the revisions required by paragraph (i) of this AD, no alternative actions (e.g., inspections), intervals, and/or CDCCLs may be used other than those specified in Part 2—Airworthiness Limitation Inspection (ALI)—Structures, of Appendix A, Airworthiness Limitations of the EMBRAER 170 MRBR MRB-1621, Appendix A, Part 2, Airworthiness Limitations, Revision 7, dated November 11, 2010; and Temporary Revision (TR) 7-1, dated February 11, 2011, to Part 2—Airworthiness Limitation Inspection (ALI)—Structures, of Appendix A, Airworthiness Limitations of the EMBRAER 170 MRBR MRB-1621, Revision 7, dated November 11, 2010, unless the actions, intervals, and/or CDCCLs are approved as an AMOC in accordance with the procedures specified in paragraph (k)(1) of this AD.
(1) Alternative Methods of Compliance (AMOCs): The Manager, International Branch, ANM-116, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the International Branch, send it to ATTN: Cindy Ashforth, Aerospace Engineer, International Branch, ANM-116, Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, Washington 98057-3356; telephone (425) 227-2768; fax (425) 227-1320. Information may be emailed to: 9-ANM-116-AMOC-REQUESTS@faa.gov. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office. The AMOC approval letter must specifically reference this AD.
Refer to MCAI Brazilian Airworthiness Directive 2011-04-01, dated May 5, 2011; and Part 2—Airworthiness Limitation Inspection (ALI)—Structures, of Appendix A, Airworthiness Limitations of the EMBRAER 170 MRBR MRB-1621, Appendix A, Part 2, Airworthiness Limitations, Revision 7, dated November 11, 2010; and Temporary Revision (TR) 7-1, dated February 11, 2011, to Part 2—Airworthiness Limitation Inspection (ALI)—Structures, of Appendix A, Airworthiness Limitations of the EMBRAER 170 MRBR MRB-1621, Revision 7, dated November 11, 2010; for related information.
[FR Doc. 2011-33279 Filed 12-28-11; 8:45 a.m.]