AD 2005-04-14 R1

AD Final Rules - 2005-04-14 R1.pdf
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AD Number:
2005-04-14 R1
Document Type:
AD Final Rules
Docket Number:
FAA-2005-22054
Subject Heading:
Airworthiness Directives; Boeing Model 757-200, 757-200CB, and 757-200PF Series Airplanes Equipped W...Show more
Subject:
Shims
Status:
Current
Citation:
(Federal Register: August 11, 2005 (Volume 70, Number 154))
Citation Publish Date:
08/11/2005
Effective Date:
03/15/2005
Make:
The Boeing Company
Model:
757-200 Series | 757-200CB Series | 757-200PF Series
Product Type:
Aircraft
Product Subtype:
Large Airplane
Affected AD:
Superseded AD:
2005-04-14
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
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[Federal Register: August 11, 2005 (Volume 70, Number 154)]


[Rules and Regulations]


[Page 46747-46752]


From the Federal Register Online via GPO Access [wais.access.gpo.gov]


[DOCID:fr11au05-2]


–––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. FAA-2005-22054; Directorate Identifier 2005-NM-137-AD; Amendment 39-14216;


AD 2005-04-14 R1]


RIN 2120-AA64


Airworthiness Directives; Boeing Model 757-200, 757-200CB, and 757-200PF Series Airplanes


Equipped With Rolls Royce Model RB211 Engines


AGENCY:
 
Federal Aviation Administration (FAA), Department of Transportation (DOT).


ACTION:
 
Final rule; request for comments.


–––––––––––––––––––––––––––––––––––


SUMMARY:
 
The FAA is revising an existing airworthiness directive (AD), which applies to certain


Boeing Model 757-200, 757-200CB, and 757-200PF series airplanes. That AD currently requires


repetitive inspections to detect horizontal or vertical movement of the shims at the joint of the mid-


bulkhead and the upper link fittings; repetitive inspections for cracking of the mid-bulkhead; and


corrective action if necessary. That AD also provides optional terminating action for the repetitive


inspections. This AD continues to require the existing requirements and optional actions and clarifies


certain terminating actions. This AD results from comments received in response to an existing AD,


requesting clarification. We are issuing this AD to detect and correct migration of shims at the joint


of the mid-bulkhead and the upper link fittings and cracking of the mid-bulkhead, which could result


in cracking of the strut and consequent loss of the strut and engine.


DATES:
 
Effective March 15, 2005.


On March 15, 2005 (70 FR 9511, February 28, 2005), the Director of the Federal Register


approved the incorporation by reference of Boeing Service Bulletin 757-54A0039, Revision 2, dated


December 2, 2004; and Boeing Service Bulletin 757-54A0039, Revision 3, dated January 13, 2005.


On April 18, 2003 (68 FR 16200, April 3, 2003), the Director of the Federal Register approved


the incorporation by reference of Boeing Alert Service Bulletin 757-54A0039, Revision 1, dated June


20, 2002.


We must receive any comments on this AD by October 11, 2005.


ADDRESSES:
 
Use one of the following addresses to submit comments on this AD:


•
 
DOT Docket Web site: Go to
 
http://dms.dot.gov
 
and follow the instructions for sending your


comments electronically.


•
 
Government-wide rulemaking Web site: Go to
 
http://www.regulations.gov
 
and follow the


instructions for sending your comments electronically.
2


•
 
Mail: Docket Management Facility; U.S. Department of Transportation, 400 Seventh Street,


SW., Nassif Building, Room PL-401, Washington, DC 20590.


•
 
Fax: (202) 493-2251.


•
 
Hand Delivery: Room PL-401 on the plaza level of the Nassif Building, 400 Seventh Street,


SW., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays.


Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-2207, for


service information identified in this AD.


FOR FURTHER INFORMATION CONTACT:
 
Dennis Stremick, Aerospace Engineer, Airframe


Branch, ANM-120S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton,


Washington 98055-4056; telephone (425) 917-6450; fax (425) 917-6590.


SUPPLEMENTARY INFORMATION:


Discussion


On February 14, 2005, we issued AD 2005-04-14, amendment 39-13986 (70 FR 9511, February


28, 2005). That AD applies to certain Boeing Model 757-200, 757-200CB, and 757-200PF series


airplanes. That AD requires repetitive detailed inspections to detect horizontal or vertical movement


of the shims at the joint of the mid-bulkhead and the upper link fittings; repetitive detailed


inspections for cracking of the mid-bulkhead; and corrective action if necessary. That AD also


provides optional terminating action for the repetitive inspections. That AD resulted from reports of


cracks in the mid-bulkhead lower vertical flange common to the lower chord and stiffener and reports


of cracking at other locations on the mid-bulkhead. The actions specified in that AD are intended to


detect and correct migration of shims at the joint of the mid-bulkhead and the upper link fittings and


cracking of the mid-bulkhead, which could result in cracking of the strut and consequent loss of the


strut and engine.


Comments


We provided the public the opportunity to submit any relevant written data, views, or arguments


about AD 2005-04-14. We have considered the comments received. We have revised AD 2005-04-14


based on the following comments:


Requests To Clarify Terminating Actions


One commenter, the airplane manufacturer, requests that paragraph (k) of AD 2005-04-14 be


revised to clarify that accomplishing the optional one-time high frequency eddy current (HFEC)


inspection specified only in paragraph (m) ends the repetitive inspections required by paragraph


(j)(1). The commenter notes that those repetitive inspections are only applicable to airplanes on


which the actions specified in Boeing Alert Service Bulletin (ASB) 757-54A0039, dated November


2, 2000, have been accomplished prior to April 18, 2003. The commenter states that operators of


those airplanes have already done the shim replacement specified in paragraph (l), making that action


redundant.


We agree and have revised paragraph (k) of AD 2005-04-14 in this AD accordingly.


The same commenter also requests that paragraphs (k) and (s) of AD 2005-04-14 be revised to


clarify that accomplishing the optional one-time HFEC inspection specified in paragraphs (m) and


(u), as applicable, ends the repetitive detailed inspections required by paragraph (r)(1). The


commenter notes that, in paragraph (k), similar repetitive detailed inspections required by paragraph


(j)(1) are terminated by accomplishing the optional actions specified in paragraphs (l) and (m). The


commenter also states that the optional one-time HFEC inspection in paragraph (m) is equivalent to


that in paragraph (u).