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[Federal Register: April 2, 2010 (Volume 75, Number 63)]
[Rules and Regulations]               
[Page 16651-16655]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr02ap10-5]                         

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2009-0684; Directorate Identifier 2008-NM-149-AD; 
Amendment 39-16247; AD 2010-07-03]
RIN 2120-AA64

 
Airworthiness Directives; The Boeing Company Model 747-200C and -
200F Series Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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SUMMARY: The FAA is superseding an existing airworthiness directive 
(AD), which applies to certain Model 747-200C and -200F series 
airplanes. That AD currently requires repetitive inspections to find 
fatigue cracking in the floor panel attachment fastener holes of the 
upper chord of certain upper deck floor beams in Section 41 (i.e., body 
station 520 and forward), and repair if necessary. The existing AD also 
provides optional modifications, which extend the threshold for 
initiating certain repetitive inspections. This new AD requires 
additional repetitive inspections to find fatigue cracking in the floor 
panel attachment fastener holes of the upper chord of certain other 
upper deck floor beams in Section 41 and Section 42 (i.e., aft of body 
station 520); repetitive inspections to find fatigue cracking in the 
permanent fastener holes of the upper chord of certain upper deck floor 
beams in Section 41; and related investigative and corrective actions. 
This new AD also provides a new optional modification, which terminates 
certain repetitive inspections. This AD results from new reports of 
cracking in the upper chord of the upper deck floor beams in Sections 
41 and 42, and new analysis that shows the permanent fastener holes of 
the upper chord of certain upper deck floor beams in Section 41 are 
also susceptible to fatigue cracking. We are issuing this AD to detect 
and correct cracking in the upper chord of the upper deck floor beams. 
Such cracking could extend and sever the floor beams, which could 
result in rapid decompression and loss of controllability of the 
airplane.

DATES: This AD becomes effective May 7, 2010.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in the AD as of May 7, 2010.

ADDRESSES: For service information identified in this AD, contact 
Boeing Commercial Airplanes, Attention: Data & Services Management, 
P.O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone 206-
544-5000, extension 1; fax 206-766-5680; e-mail me.boecom@boeing.com; 
Internet https://www.myboeingfleet.com.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Management Facility 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains this AD, the regulatory evaluation, 
any comments received, and other information. The address for the 
Docket Office (telephone 800-647-5527) is the Docket Management 
Facility, U.S. Department of Transportation, Docket Operations, M-30, 
West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., 
Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Ivan Li, Aerospace Engineer, Airframe 
Branch, ANM-120S, FAA, Seattle Aircraft Certification Office, 1601 Lind 
Avenue, SW., Renton, Washington 98057-3356; telephone (425) 917-6437; 
fax (425) 917-6590.

SUPPLEMENTARY INFORMATION:

Discussion

    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 to include an AD that supersedes AD 2006-08-02, amendment 
39-14556 (70 FR 18618, April 12, 2006). The existing AD applies to 
certain Model 747-200C and -200F series airplanes. That NPRM was 
published in the Federal Register on August 12, 2009 (74 FR 40529). 
That NPRM proposed to continue to require repetitive inspections to 
find fatigue cracking in the floor panel attachment fastener

[[Page 16652]]

holes of the upper chord of certain upper deck floor beams in Section 
41 (i.e., body station 520 and forward), and repair if necessary. That 
NPRM also proposed to continue to provide optional modifications, which 
extend the threshold for the initiation of certain repetitive 
inspections. That NPRM also proposed to add repetitive inspections to 
find fatigue cracking in the floor panel attachment fastener holes of 
the upper chord of certain other upper deck floor beams in Section 41 
and Section 42 (i.e., aft of body station 520); repetitive inspections 
to find fatigue cracking in the permanent fastener holes of the upper 
chord of certain upper deck floor beams in Section 41; and related 
investigative and corrective actions. Additionally, that NPRM proposed 
to provide a new optional modification, which would terminate certain 
repetitive inspections.

Comments

    We provided the public the opportunity to participate in the 
development of this AD. We have considered the comments that have been 
received on the NPRM from the single commenter.

Request To Revise Procedure Location Specified in Step (5) of Table 2 
of the NPRM

    Boeing requests that we revise Table 2 of the NPRM to update the 
location in the referenced service bulletin for the modification 
provided in Step (5) of Table 2 of the NPRM. Boeing points out that the 
modification referred to in paragraph (h)(2) of AD 2006-08-02, provided 
in Step (5) in Table 2 of the NPRM, was defined in Figure 5 of the 
original issue of Boeing Alert Service Bulletin 747-53A2439, dated July 
5, 2001. Boeing further points out that the instructions for this 
modification were moved to Part 3 and Part 4 of the Work Instructions 
of Revision 2, dated July 17, 2008, of Boeing Alert Service Bulletin 
747-53A2439.
    We do not agree to revise Table 2 of this AD. Step (5) of Table 2 
references paragraph (i)(2) of this AD, and requires only the fastener 
hole modification per Figure 5 and the open-hole high-frequency eddy 
current (HFEC) inspection per Part 1 of the Work Instructions of Boeing 
Alert Service Bulletin 747-53A2439, Revision 2, dated July 17, 2008. 
The fastener hole slot repair per Part 4 of the Work Instructions of 
Boeing Alert Service Bulletin 747-53A2439, Revision 2, dated July 17, 
2008, is not required by paragraph (i)(2) of this AD. We note that the 
fastener hole slot repair per Part 4 of the Work Instructions of Boeing 
Alert Service Bulletin 747-53A2439, Revision 2, dated July 17, 2008, 
which is referenced in Part 2 of the Work Instructions of Boeing Alert 
Service Bulletin 747-53A2439, Revision 2, dated July 17, 2008, is 
required by paragraph (i)(1) of this AD. We have made no change to the 
final rule in this regard.

Request To Update Name of Boeing's Delegation Option Authorization 
Organization

    Boeing requests that we revise paragraphs (h)(1) and (o)(4) of the 
NPRM to change ``Boeing Commercial Airplanes Delegation Option 
Authorization Organization'' to ``Boeing Commercial Airplanes 
Organization Designation Authorization Organization.'' Boeing points 
out that they changed the name of this organization at the end of 
August 2009.
    We partially agree. Boeing Commercial Airplanes has received an 
Organization Designation Authorization (ODA), which replaces their 
previous designation as a Delegation Option Authorization holder. We 
have revised paragraph (o)(4) of this AD to delegate the authority to 
approve an alternative method of compliance for any repair required by 
this AD to the Boeing Commercial Airplanes ODA rather than an 
Authorized Representative under the former Delegation Option 
Authorization (DOA) program. However, we have also revised paragraph 
(h)(1) of this AD to reference paragraph (o) of this AD and to continue 
to provide allowance for those operators that have used a repair 
approved by a Boeing Company Designated Engineering Representative 
(DER) or by an Authorized Representative for the Boeing Commercial 
Airplanes DOA.

Explanation of Changes Made to This AD

    We have revised this AD to identify the legal name of the 
manufacturer as published in the most recent type certificate data 
sheet for the affected airplane models.

Conclusion

    We have carefully reviewed the available data, including the 
comments that have been received, and determined that air safety and 
the public interest require adopting the AD with the changes described 
previously. We have determined that these changes will neither increase 
the economic burden on any operator nor increase the scope of the AD.

Explanation of Change to Costs of Compliance

    Since issuance of the original NPRM, we have increased the labor 
rate used in the Costs of Compliance from $80 per work-hour to $85 per 
work-hour. The Costs of Compliance information, below, reflects this 
increase in the specified hourly labor rate.

Costs of Compliance

    There are about 68 airplanes of the affected design in the 
worldwide fleet. The following table provides the estimated costs for 
U.S. operators to comply with this AD.

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                Average                        Number of U.S.-
             Action               Work hours   labor rate   Cost per airplane    registered        Fleet cost
                                                per hour                          airplanes
----------------------------------------------------------------------------------------------------------------
Inspections (required by AD               29          $85  $2,465 per                      25  $61,625 per
 2006-08-02).                                               inspection cycle.                   inspection
                                                                                                cycle.
Inspection of Area 5 and                  78           85  $6,630 per                      25  $165,750 per
 permanent fastener hole in                                 inspection cycle.                   inspection
 Areas 1, 2, 3, and 4 (new                                                                      cycle.
 required action).
----------------------------------------------------------------------------------------------------------------

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, Section 106, describes the 
authority of the FAA Administrator. Subtitle VII, Aviation Programs, 
describes in more detail the scope of the Agency's authority.

[[Page 16653]]

    We are issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701, ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We have determined that this AD will not have federalism 
implications under Executive Order 13132. This AD will not have a 
substantial direct effect on the States, on the relationship between 
the national government and the States, or on the distribution of power 
and responsibilities among the various levels of government.
    For the reasons discussed above, I certify that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866;
    (2) Is not a ``significant rule'' under DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979); and
    (3) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this AD and placed it in the AD docket. See the ADDRESSES 
section for a location to examine the regulatory evaluation.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

0
Accordingly, under the authority delegated to me by the Administrator, 
the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The Federal Aviation Administration (FAA) amends Sec.  39.13 by 
removing amendment 39-14556 (70 FR 18618, April 12, 2006) and by adding 
the following new airworthiness directive (AD):

2010-07-03 The Boeing Company: Amendment 39-16247. Docket No. FAA-
2009-0684; Directorate Identifier 2008-NM-149-AD.

Effective Date

    (a) This AD becomes effective May 7, 2010.

Affected ADs

    (b) This AD supersedes AD 2006-08-02, Amendment 39-14556.

Applicability

    (c) This AD applies to The Boeing Company Model 747-200C and -
200F series airplanes, certificated in any category, as identified 
in Boeing Alert Service Bulletin 747-53A2439, Revision 2, dated July 
17, 2008.

Subject

    (d) Air Transport Association (ATA) of America Code 53: 
Fuselage.

Unsafe Condition

    (e) This AD results from new reports of cracking in the upper 
chord of the upper deck floor beams in Sections 41 and 42, and new 
analysis that shows the permanent fastener holes of the upper chord 
of certain upper deck floor beams in Section 41 are also susceptible 
to fatigue cracking. We are issuing this AD to detect and correct 
cracking in the upper chord of the upper deck floor beams. Such 
cracking could extend and sever the floor beams, which could result 
in rapid decompression and loss of controllability of the airplane.

Compliance

    (f) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

Requirements of AD 2006-08-02

Initial Compliance Time at a New Reduced Threshold

    (g) At the earliest of the times specified in paragraphs (g)(1) 
through (g)(3) of this AD, do the inspection required by paragraph 
(h) of this AD.
    (1) Before the accumulation of 22,000 total flight cycles, or 
within 1,000 flight cycles after March 15, 2004 (the effective date 
of AD 2004-03-11, which was superseded by AD 2006-08-02), whichever 
occurs later.
    (2) For airplanes with 17,000 or more total flight cycles as of 
May 17, 2006 (the effective date of AD 2006-08-02): Before the 
accumulation of 18,000 total flight cycles, or within 90 days after 
May 17, 2006, whichever occurs later.
    (3) For airplanes with fewer than 17,000 total flight cycles as 
of May 17, 2006: Before the accumulation of 15,000 total flight 
cycles, or within 1,000 flight cycles after May 17, 2006, whichever 
occurs later.

Inspections at Reduced Intervals for Certain Floor Beams and Repair

    (h) Do the applicable inspection to find fatigue cracking in the 
upper chord of the upper deck floor beams as specified in Part 1 
(Open-Hole High Frequency Eddy Current (HFEC) Inspection Method) or 
Part 2 (Surface HFEC Inspection Method) of the Work Instructions of 
Boeing Alert Service Bulletin 747-53A2439, dated July 5, 2001. Do 
the inspections per the Boeing Alert Service Bulletin 747-53A2439, 
dated July 5, 2001, except as provided by paragraph (k) of this AD. 
Any combination of the applicable inspection methods specified in 
Parts 1 and 2 may be used, provided that the corresponding 
repetitive inspection interval is used.
    (1) If any crack is found, before further flight, repair per 
Part 3 (Upper Chord Repair) of the Work Instructions of Boeing Alert 
Service Bulletin 747-53A2439, dated July 5, 2001; except where 
Boeing Alert Service Bulletin 747-53A2439, dated July 5, 2001, 
specifies to contact Boeing for appropriate action, before further 
flight, repair using a method approved in accordance with the 
procedures specified in paragraph (o) of this AD or repair according 
to data meeting the certification basis of the airplane approved by 
a Boeing Company Designated Engineering Representative (DER) or by 
an Authorized Representative for the Boeing Commercial Airplanes 
Delegation Option Authorization Organization. For a repair method to 
be approved by the Manager, Seattle Aircraft Certification Office 
(ACO), FAA, as required by this paragraph, the Manager's approval 
letter must specifically reference this AD. Do the applicable 
inspection of the repaired area per Part 1 of the Work Instructions 
of Boeing Alert Service Bulletin 747-53A2439, dated July 5, 2001, at 
the applicable time per Part 3 of the Work Instructions of Boeing 
Alert Service Bulletin 747-53A2439, dated July 5, 2001, and repeat 
the applicable inspection at the applicable interval per Figure 1 of 
Boeing Alert Service Bulletin 747-53A2439, dated July 5, 2001.
    (2) If no crack is found, repeat the applicable inspection per 
paragraph (h) of this AD at the applicable time specified in 
paragraphs (h)(2)(i) through (h)(2)(iii) of this AD. As an option to 
the repetitive inspections, accomplishment of paragraph (i)(1) or 
(i)(2) of this AD, before further flight, extends the threshold for 
the initiation of the repetitive inspections required by this 
paragraph.
    (i) If the immediately preceding inspection was conducted using 
an open-hole HFEC inspection method: Conduct the next inspection of 
that area within 3,000 flight cycles of the last inspection.
    (ii) If the immediately preceding inspection was conducted using 
a surface HFEC inspection method at stations 340 through 420 
inclusive and station 500: Conduct the next inspection of that area 
within 750 flight cycles of the last inspection.
    (iii) If the immediately preceding inspection was conducted 
using a surface HFEC inspection method at stations 440 and 520: 
Conduct the next inspection of that area at the earlier of the times 
specified in paragraphs (h)(2)(iii)(A) and (h)(2)(iii)(B) of this 
AD, and thereafter at intervals not to exceed 250 flight cycles.
    (A) Within 750 flight cycles since the last surface HFEC 
inspection required by paragraph (h) of this AD.
    (B) Within 250 flight cycles after May 17, 2006.

[[Page 16654]]

Optional Repair/Modification

    (i) For areas on which the inspection required by paragraph (h) 
of this AD is done per Part 1 of the Work Instructions of Boeing 
Alert Service Bulletin 747-53A2439, dated July 5, 2001; and on which 
no cracking is found: Accomplishment of the actions specified in 
either paragraph (i)(1) or (i)(2) of this AD extends the threshold 
for the initiation of the repetitive inspections required by 
paragraph (h)(2) of this AD. For areas on which the inspection 
required by paragraph (h) of this AD is done per Part 2 of Boeing 
Alert Service Bulletin 747-53A2439, dated July 5, 2001; and on which 
no cracking is found: Accomplishment of the actions specified in 
paragraph (i)(1) of this AD extends the threshold for the initiation 
of the repetitive inspections required by paragraph (h)(2) of this 
AD.
    (1) Do the applicable repair per Part 3 of the Work Instructions 
of Boeing Alert Service Bulletin 747-53A2439, dated July 5, 2001, 
except as provided by paragraph (k) of this AD. At the applicable 
time specified in Table 1 of Part 3 of the Work Instructions of 
Boeing Alert Service Bulletin 747-53A2439, dated July 5, 2001, do 
the applicable inspection of the repaired area per Part 1 of the 
Work Instructions of Boeing Alert Service Bulletin 747-53A2439, 
dated July 5, 2001. Repeat the inspection thereafter within the 
applicable interval of 3,000 flight cycles per Figure 1 of Boeing 
Alert Service Bulletin 747-53A2439, dated July 5, 2001.
    (2) Do the modification of the attachment hole of the floor 
panel per Figure 5 of Boeing Alert Service Bulletin 747-53A2439, 
dated July 5, 2001, except as provided by paragraph (k) of this AD. 
Within 10,000 flight cycles after accomplishment of the 
modification, do the inspection of the modified area per Part 1 of 
the Work Instructions of Boeing Alert Service Bulletin 747-53A2439, 
dated July 5, 2001. Repeat the inspection thereafter within the 
applicable interval of 3,000 flight cycles per Figure 1 of Boeing 
Alert Service Bulletin 747-53A2439, dated July 5, 2001.

Determining the Number of Flight Cycles for Compliance Time

    (j) For the purposes of calculating the compliance threshold and 
repetitive intervals for actions required by paragraph (g), (h), or 
(i) of this AD: As of May 17, 2006 (the effective date of AD 2006-
08-02), all flight cycles, including the number of flight cycles in 
which cabin differential pressure is at 2.0 pounds per square inch 
(psi) or less, must be counted when determining the number of flight 
cycles that have occurred on the airplane.

New Requirements of This AD

Applicable Revisions of Service Bulletins

    (k) Use the information in Tables 1 and 2 of this AD, at the 
applicable time specified in paragraphs (k)(1) and (k)(2) of this 
AD, to determine the part of the applicable service bulletin to use 
to accomplish the actions required by this AD.
    (1) On or after May 17, 2006, but before the effective date of 
this AD, use only the service information listed in Table 1 or Table 
2 of this AD.

Table 1--Service Information Given in Boeing Alert Service Bulletin 747-
                53A2439, Revision 1, Dated March 10, 2005
------------------------------------------------------------------------
             Do--                         In accordance with--
------------------------------------------------------------------------
(1) The actions required by    Parts 1 and 2 of the Work Instructions of
 paragraph (h) of this AD.      Boeing Alert Service Bulletin 747-
                                53A2439, Revision 1, dated March 10,
                                2005; as applicable.
(2) The applicable inspection  Parts 1 and 6 of the Work Instructions of
 of the repaired area           Boeing Alert Service Bulletin 747-
 required by paragraph (h)(1)   53A2439, Revision 1, dated March 10,
 of this AD.                    2005; as applicable; at the applicable
                                time specified in Table 1 of Part 3 of
                                the Work Instructions of that service
                                bulletin.
(3) The actions required by    Parts 1, 3, and 6 of the Work
 paragraph (i)(1) of this AD.   Instructions of Boeing Alert Service
                                Bulletin 747-53A2439, Revision 1, dated
                                March 10, 2005; as applicable.
(4) The actions required by    Figure 5 and Part 1 of the Work
 paragraph (i)(2) of this AD.   Instructions of Boeing Alert Service
                                Bulletin 747-53A2439, Revision 1, dated
                                March 10, 2005; as applicable.
------------------------------------------------------------------------

    (2) On or after the effective date of this AD, use only the 
service information listed in Table 2 of this AD.

Table 2--Service Information Given in Boeing Alert Service Bulletin 747-
                53A2439, Revision 2, Dated July 17, 2008
------------------------------------------------------------------------
             Do--                         In accordance with--
------------------------------------------------------------------------
(1) The actions required by    Part 1 (open-hole or surface HFEC
 paragraph (h) and (l) of       inspection, as applicable) of the Work
 this AD.                       Instructions of Boeing Alert Service
                                Bulletin 747-53A2439, Revision 2, dated
                                July 17, 2008.
(2) The applicable inspection  Part 1 (open-hole HFEC inspection only)
 of the repaired area           and Part 5 of the Work Instructions of
 required by paragraph (h)(1)   Boeing Alert Service Bulletin 747-
 of this AD.                    53A2439, Revision 2, dated July 17,
                                2008; at the applicable time specified
                                in Table 1 of Part 2 of the Work
                                Instructions of that service bulletin.
(3) The applicable repair      Part 2 (upper chord repair at floor panel
 required by paragraph (h)(1)   attach holes) of the Work Instructions
 of this AD.                    of Boeing Alert Service Bulletin 747-
                                53A2439, Revision 2, dated July 17,
                                2008.
(4) The actions required by    Part 1 (open-hole HFEC inspection only),
 paragraph (i)(1) of this AD.   Part 2, and Part 5 of the Work
                                Instructions of Boeing Alert Service
                                Bulletin 747-53A2439, Revision 2, dated
                                July 17, 2008.
(5) The actions required by    Figure 5 and Part 1 (open-hole HFEC
 paragraph (i)(2) of this AD.   inspection only) of the Work
                                Instructions of Boeing Alert Service
                                Bulletin 747-53A2439, Revision 2, dated
                                July 17, 2008.
------------------------------------------------------------------------

New Inspections and Related Investigative and Corrective Actions

    (l) For all airplanes, except as provided by paragraphs (k)(1) 
and (k)(2) of this AD: At the applicable time specified in Paragraph 
1.E., ``Compliance,'' of Boeing Alert Service Bulletin 747-53A2439, 
Revision 2, dated July 17, 2008, do the applicable open-hole or 
surface HFEC inspections for fatigue cracking in the upper chord of 
the upper deck floor beams in Area 5, and the inspection for fatigue 
cracking in the permanent fastener holes of the upper chord of 
certain upper deck floor beams in Areas 1, 2, 3, and 4, in 
accordance with the Accomplishment Instructions of Boeing Alert 
Service Bulletin 747-53A2439, Revision 2, dated July 17, 2008. Do 
all applicable related investigative and corrective actions before 
further flight. Repeat the applicable inspection thereafter at the 
applicable interval specified in Paragraph 1.E., ``Compliance,'' of 
Boeing Alert Service Bulletin 747-53A2439, Revision 2, dated July 
17, 2008.

[[Page 16655]]

    (1) Where Boeing Alert Service Bulletin 747-53A2439, Revision 2, 
dated July 17, 2008, specifies a compliance time relative to the 
date of issuance of that service bulletin, this AD requires 
compliance within the specified compliance time after the effective 
date of this AD.
    (2) Where Boeing Alert Service Bulletin 747-53A2439, Revision 2, 
dated July 17, 2008, specifies contacting Boeing for repair data: 
Before further flight, repair using a method approved in accordance 
with the procedures specified in paragraph (o) of this AD.

Optional New Modification for Areas 1, 2, 3, and 4

    (m) For areas 1, 2, 3, and 4 as defined in Boeing Alert Service 
Bulletin 747-53A2439, Revision 2, dated July 17, 2008: Doing the 
modification and post-modification actions specified in Boeing Alert 
Service Bulletin 747-53A2696, dated October 16, 2008, terminates the 
repetitive inspection requirements of paragraphs (g) and (h) of this 
AD. Doing the modification and post-modification actions specified 
in Boeing Alert Service Bulletin 747-53A2696, dated October 16, 
2008, terminates the repetitive inspection requirements of paragraph 
(l) of this AD, except at the upper deck floor beam at body station 
(BS) 460 and 480 and the upper deck floor beams aft of BS 520.

No Reporting Requirement

    (n) Although Boeing Alert Service Bulletin 747-53A2439, Revision 
1, dated March 10, 2005; and Boeing Alert Service Bulletin 747-
53A2439, Revision 2, dated July 17, 2008; specify to submit certain 
information to the manufacturer, this AD does not include that 
requirement.

Alternative Methods of Compliance (AMOCs)

    (o)(1) The Manager, Seattle ACO, FAA, has the authority to 
approve AMOCs for this AD, if requested using the procedures found 
in 14 CFR 39.19. Send information to ATTN: Ivan Li, Aerospace 
Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft 
Certification Office, 1601 Lind Avenue, SW., Renton, Washington 
98057-3356; telephone (425) 917-6437; fax (425) 917-6590. Or, e-mail 
information to 9-ANM-Seattle-ACO-AMOC-Requests@faa.gov.
    (2) To request a different method of compliance or a different 
compliance time for this AD, follow the procedures in 14 CFR 39.19. 
Before using any approved AMOC on any airplane to which the AMOC 
applies, notify your principal maintenance inspector (PMI) or 
principal avionics inspector (PAI), as appropriate, or lacking a 
principal inspector, your local Flight Standards District Office. 
The AMOC approval letter must specifically reference this AD.
    (3) AMOCs approved previously in accordance with AD 2006-08-02, 
are approved as AMOCs for the corresponding provisions of this AD.
    (4) An AMOC that provides an acceptable level of safety may be 
used for any repair required by this AD if it is approved by the 
Boeing Commercial Airplanes Organization Designation Authorization 
(ODA) that has been authorized by the Manager, Seattle ACO to make 
those findings. For a repair method to be approved, the repair must 
meet the certification basis of the airplane, and the approval must 
specifically refer to this AD.

Material Incorporated by Reference

    (p) You must use Boeing Alert Service Bulletin 747-53A2439, 
Revision 2, dated July 17, 2008, to do the actions required by this 
AD, unless the AD specifies otherwise. If you accomplish the new 
optional actions specified by this AD, you must use Boeing Alert 
Service Bulletin 747-53A2696, dated October 16, 2008, to perform 
those actions, unless the AD specifies otherwise.
    (1) The Director of the Federal Register approved the 
incorporation by reference of this service information under 5 
U.S.C. 552(a) and 1 CFR part 51.
    (2) For service information identified in this AD, contact 
Boeing Commercial Airplanes, Attention: Data & Services Management, 
P.O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone 
206-544-5000, extension 1, fax 206-766-5680; e-mail 
me.boecom@boeing.com; Internet https://www.myboeingfleet.com.
    (3) You may review copies of the 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.
    (4) You may also review copies of the service information that 
is incorporated by reference at the National Archives and Records 
Administration (NARA). For information on the availability of this 
material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

    Issued in Renton, Washington, on March 17, 2010.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2010-6546 Filed 4-1-10; 8:45 am]
BILLING CODE 4910-13-P
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