AD 2007-12-11

AD Final Rules - 2007-12-11.pdf
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AD Number:
2007-12-11
Document Type:
AD Final Rules
Docket Number:
FAA-2007-27525
Subject Heading:
Airworthiness Directives; Boeing Model 747-100, 747-100B, 747- 100B SUD, 747-200B, 747-200C, 747-300, 747-400, 747-400D, 747SR, and 747SP Series Airpl... ...Show more
Subject:
Main entry doors (MED)
Status:
Current
Citation:
(Federal Register: June 11, 2007 (Volume 72, Number 111))
Citation Publish Date:
06/11/2007
Effective Date:
07/16/2007
Make:
The Boeing Company
Model:
747-100 Series | 747-100B Series | 747-100B SUD Series | 747-200B Series | 747-200C Series | 747-300 Series | 747-400 Series | 747-400D Series ...Show more
Product Type:
Aircraft
Product Subtype:
Large Airplane
Affected AD:
Superseded AD:
96-23-05
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
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[Federal Register: June 11, 2007 (Volume 72, Number 111)]


[Rules and Regulations]


[Page 31984-31988]


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


[DOCID:fr11jn07-7]


––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. FAA-2007-27525; Directorate Identifier 2006-NM-159-AD; Amendment 39-15089;


AD 2007-12-11]


RIN 2120-AA64


Airworthiness Directives; Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-


200C, 747-300, 747-400, 747-400D, 747SR, and 747SP Series Airplanes


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


ACTION:
 
Final rule.


––––––––––––––––––––––––––––––––––


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


certain Boeing Model 747 airplanes. That AD currently requires repetitive inspections to detect


cracks and/or corrosion of the girt bar support fitting at certain main entry doors (MED), and repair or


replacement of the support fitting. The existing AD also provides for various terminating actions for


the repetitive inspections. This new AD requires the following additional actions: An inspection, for


certain airplanes, for correct installation of square and conical washers in the girt bar support fitting;


an inspection, for certain other airplanes, to determine if the washers are installed; and related


investigative and corrective action if necessary. This AD results from a report that the square and


conical washers may be installed incorrectly in the girt bar support fitting on airplanes on which the


support fitting was repaired or replaced in accordance with the requirements of the existing AD. We


are issuing this AD to detect and correct corrosion of the girt bar support fitting, which could result in


separation of the escape slide from the lower door sill during deployment, and subsequently prevent


proper operation of the escape slides at the main entry doors during an emergency. We are also


issuing this AD to detect and correct incorrect installation of the square and conical washers in the


girt bar support fitting, which could result in failure of the escape slide when deployed.


DATES:
 
This AD becomes effective July 16, 2007.


The Director of the Federal Register approved the incorporation by reference of a certain


publication listed in the AD as of July 16, 2007.


On December 16, 1996 (61 FR 58318, November 14, 1996), the Director of the Federal Register


approved the incorporation by reference of Boeing Service Bulletin 747-53A2378, Revision 1, dated


March 10, 1994.
2


ADDRESSES:
 
You may examine the AD docket on the Internet at http://dms.dot.gov or in person at


the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW.,


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


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


service information identified in this AD.


FOR FURTHER INFORMATION CONTACT:
 
Patrick Gillespie, Aerospace Engineer, Cabin


Safety and Environmental Systems Branch, ANM-150S, FAA, Seattle Aircraft Certification Office,


1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 917-6429; fax (425) 917-


6590.


SUPPLEMENTARY INFORMATION:


Examining the Docket


You may examine the airworthiness directive (AD) docket on the Internet at http://dms.dot.gov


or in person at the Docket Management Facility office between 9 a.m. and 5 p.m., Monday through


Friday, except Federal holidays. The Docket Management Facility office (telephone (800) 647-5227)


is located on the plaza level of the Nassif Building at the street address stated in the ADDRESSES


section.


Discussion


The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include


an AD that supersedes AD 96-23-05, amendment 39-9810 (61 FR 58318, November 14, 1996). The


existing AD applies to certain Boeing Model 747 airplanes. That NPRM was published in the Federal


Register on March 15, 2007 (72 FR 12136). That NPRM proposed to continue to require repetitive


inspections to detect cracks and/or corrosion of the girt bar support fitting at certain main entry doors


(MED), and repair or replacement of the support fitting. The existing AD also provides for various


terminating actions for the repetitive inspections. The NPRM also proposed to require the following


additional actions: An inspection, for certain airplanes, for correct installation of square and conical


washers in the girt bar support fitting; an inspection, for certain other airplanes, to determine if the


washers are installed; and related investigative and corrective action if necessary.


Comments


We provided the public the opportunity to participate in the development of this AD. We have


considered the single comment that has been received on the NPRM. The commenter, Boeing,


supports the NPRM.


Clarification of Alternative Method of Compliance (AMOC) Paragraph


We have revised this action to clarify the appropriate procedure for notifying the principal


inspector before using any approved AMOC on any airplane to which the AMOC applies.


Conclusion


We have carefully reviewed the available data, including the comment that has been received,


and determined that air safety and the public interest require adopting the AD with the change


described previously. We have determined that this change will neither increase the economic burden


on any operator nor increase the scope of the AD.