[Federal Register Volume 72, Number 43 (Tuesday, March 6, 2007)]
[Proposed Rules]
[Pages 9880-9884]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E7-3841]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2006-25658; Directorate Identifier 2006-NM-054-AD]
RIN 2120-AA64


Airworthiness Directives; Airbus Model A318, A319, A320, and A321 
Airplanes

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

ACTION: Supplemental notice of proposed rulemaking (NPRM); reopening of 
comment period.

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SUMMARY: The FAA is revising an earlier NPRM for an airworthiness 
directive (AD) that applies to certain Airbus Model A318, A319, A320, 
and A321 airplanes. The original NPRM would have superseded an existing 
AD that currently requires repetitive detailed inspections of the 
inboard flap trunnions for any wear marks and of the sliding panels for 
any cracking at the long edges, and corrective actions if necessary. 
The original NPRM proposed to add airplanes to the applicability in the 
existing AD and change the inspection type. The original NPRM resulted 
from a determination that certain airplanes must be included in the 
applicability of the AD, and that the inspection type must be revised. 
This new action revises the original NPRM by including airplanes that 
were inadvertently excluded from the applicability. We are proposing 
this supplemental NPRM to detect and correct wear of the inboard flap 
trunnions, which could lead to loss of flap surface control and 
consequently result in the flap detaching from the airplane. A detached 
flap could result in damage to the tail of the airplane.

DATES: We must receive comments on this supplemental NPRM by April 2, 
2007.

ADDRESSES: Use one of the following addresses to submit comments on 
this proposed AD.
     DOT Docket web site: Go to http://dms.dot.gov and follow 
the instructions for sending your comments electronically.

[[Page 9881]]

     Government-wide rulemaking web site: Go to http://www.regulations.gov and follow the instructions for sending your 
comments electronically.
     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 Airbus, 1 Rond Point Maurice Bellonte, 31707 Blagnac Cedex, 
France, for service information identified in this supplemental NPRM.

FOR FURTHER INFORMATION CONTACT: Dan Rodina, Aerospace Engineer, 
International Branch, ANM-116, Transport Airplane Directorate, FAA, 
1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 
227-2125; fax (425) 227-1149.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to submit any relevant written data, views, or 
arguments regarding this proposal. Send your comments to an address 
listed in the ADDRESSES section. Include the docket number ``Docket No. 
FAA-2006-25658; Directorate Identifier 2006-NM-054-AD'' at the 
beginning of your comments. We specifically invite comments on the 
overall regulatory, economic, environmental, and energy aspects of this 
supplemental NPRM. We will consider all comments received by the 
closing date and may amend this supplemental NPRM in light of those 
comments.
    We will post all comments submitted, without change, to http://dms.dot.gov, including any personal information you provide. We will 
also post a report summarizing each substantive verbal contact with FAA 
personnel concerning this supplemental NPRM. Using the search function 
of that web site, anyone can find and read the comments in any of our 
dockets, including the name of the individual who sent the comment (or 
signed the comment on behalf of an association, business, labor union, 
etc.). You may review the DOT's complete Privacy Act Statement in the 
Federal Register published on April 11, 2000 (65 FR 19477-78), or you 
may visit http://dms.dot.gov.

Examining the Docket

    You may examine the 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 DOT 
street address stated in ADDRESSES. Comments will be available in the 
AD docket shortly after the Docket Management System receives them.

Discussion

    The FAA issued a notice of proposed rulemaking (NPRM) (the 
``original NPRM'') to amend 14 CFR part 39 to include an AD that 
supersedes AD 2006-04-06, amendment 39-14487 (71 FR 8439, February 17, 
2006). The original NPRM applies to certain Airbus Model A318, A319, 
A320, and A321-100 airplanes. The original NPRM was published in the 
Federal Register on August 22, 2006 (71 FR 48838). The original NPRM 
proposed to continue to require repetitive detailed inspections of the 
inboard flap trunnions for any wear marks and of the sliding panels for 
any cracking at the long edges, and corrective actions if necessary. 
The original NPRM also proposed to add airplanes to the applicability 
in the existing AD and change the inspection type.

Actions Since Original NPRM Was Issued

    We have determined that the original NPRM should have applied to 
certain Airbus Model A318 airplanes, and all Airbus Model A319, A320, 
and A321-111, -112, and -131 airplanes. In the original NPRM, we stated 
that we were adding Model A321-211 and -231 airplanes; however, the 
applicability was inadvertently changed to Model A318, A319, A320, and 
A321 airplanes on which Airbus Modification 26495 has been incorporated 
in production. The change resulted in the airplanes identified in 
paragraph (f) of the original NPRM (Model A319-111, -112, -113, -114, -
115, -131, -132, and -133 airplanes; Model A320-111 airplanes; Model 
A320-211, -212, -214, -231, -232, and -233 airplanes; and Model A321-
111, -112, and -131 airplanes; except those on which Airbus 
Modification 26495 has been accomplished in production) being excluded 
from the applicability of the original NPRM. We have changed the 
applicability in this supplemental NPRM to certain Airbus Model A318 
airplanes, and ``all'' Airbus Model A319-111, -112, -113, -114, -115, -
131, -132, and -133 airplanes; Model A320-111 airplanes; Model A320-
211, -212, -214, -231, -232, and -233 airplanes; and Model A321-111, -
112, -131, -211, and -231 airplanes.

Relevant Service Information

    Airbus has issued Service Bulletins A320-27-1117, Revision 03, 
dated August 24, 2001; and Revision 04, dated November 6, 2001. (Airbus 
Service Bulletin A320-27-1117, Revision 02, dated January 18, 2000, was 
referenced in the original NPRM as the appropriate source of service 
information for accomplishing the modification.) Airbus has also issued 
Airbus Service Bulletin A320-57-1133, Revision 01, dated August 7, 
2006. (Airbus Service Bulletin A320-57-1133, dated July 28, 2005, was 
referenced in the original NPRM as the appropriate source of service 
information for accomplishing the inspections.) The changes in these 
revisions are minor and no additional work is necessary for airplanes 
modified by the previous issues. We have changed the AD to refer to 
this revised service information as the appropriate source of service 
information for accomplishing the required actions. In addition, we 
have added new paragraphs (k) and (l) to this AD to provide credit for 
accomplishing the actions before the effective date of this AD in 
accordance with the service information referenced in the original 
NPRM. Subsequent paragraphs have been re-identified accordingly. 
Accomplishing the actions specified in the service information is 
intended to adequately address the unsafe condition.

Comments

    We have considered the following comments on the original NPRM.

Support for the NPRM

    Airbus supports the original NPRM.

Request To Incorporate/Publish Certain Information

    The Modification and Replacement Parts Association (MARPA) states 
that, frequently, airworthiness directives are based on service 
information originating with the type certificate holder or its 
suppliers. MARPA adds that manufacturer service documents are privately 
authored instruments generally having copyright protection against 
duplication and distribution. MARPA notes that when a service document 
is incorporated by reference into a public document, such as an 
airworthiness directive, it loses its private, protected status and 
becomes a public document. MARPA adds that if a service document is 
used as a mandatory element of compliance, it should not simply be 
referenced, but should be incorporated into the regulatory document; by 
definition, public laws must be public, which

[[Page 9882]]

means they cannot rely upon private writings. MARPA notes that since 
the interpretation of a document is a question of law, and not fact, a 
service document not incorporated by reference will not be considered 
in a legal finding of the meaning of an airworthiness directive. MARPA 
is concerned that the failure to incorporate essential service 
information could result in a court decision invalidating the 
airworthiness directive.
    MARPA adds that incorporated by reference service documents should 
be made available to the public by publication in the Docket Management 
System (DMS), keyed to the action that incorporates them. MARPA notes 
that the stated purpose of the incorporation by reference method is 
brevity, to keep from expanding the Federal Register needlessly by 
publishing documents already in the hands of the affected individuals; 
traditionally, ``affected individuals'' means aircraft owners and 
operators, who are generally provided service information by the 
manufacturer. MARPA adds that a new class of affected individuals has 
emerged, since the majority of aircraft maintenance is now performed by 
specialty shops instead of aircraft owners and operators. MARPA notes 
that this new class includes maintenance and repair organizations, 
component servicing and repair shops, parts purveyors and distributors, 
and organizations manufacturing or servicing alternatively certified 
parts under section 21.303 (``Replacement and modification parts'') of 
the Federal Aviation Regulations (14 CFR 21.303). MARPA adds that the 
distribution to owners may, when the owner is a financing or leasing 
institution, not actually reach the persons responsible for 
accomplishing the airworthiness directive. Therefore, MARPA asks that 
the service documents deemed essential to the accomplishment of the 
NPRM be incorporated by reference into the regulatory instrument, and 
published in the DMS.
    We do not agree that documents should be incorporated by reference 
during the NPRM phase of rulemaking. The Office of the Federal Register 
(OFR) requires that documents that are necessary to accomplish the 
requirements of the AD be incorporated by reference during the final 
rule phase of rulemaking. We intend that the final rule in this action 
will incorporate by reference the documents necessary for the 
accomplishment of the proposed requirements mandated by this AD. 
Further, we point out that while documents that are incorporated by 
reference do become public information, they do not lose their 
copyright protection. For that reason, we advise the public to contact 
the manufacturer to obtain copies of the referenced service 
information.
    Additionally, we do not publish service documents in DMS. We are 
currently reviewing our practice of publishing proprietary service 
information. Once we have thoroughly examined all aspects of this 
issue, and have made a final determination, we will consider whether 
our current practice needs to be revised. However, we consider that to 
delay this AD action for that reason would be inappropriate, since we 
have determined that an unsafe condition exists and that the 
requirements in this AD must be accomplished to ensure continued 
safety. Therefore, we have not changed the supplemental NPRM in this 
regard.

Clarification of Compliance Times and Applicability of Paragraphs (g) 
and (j)(2) of This Supplemental NPRM

    We have changed paragraphs (g) and (j)(2) of this supplemental NPRM 
(paragraph (i)(2) of the original NPRM) to specify the ``applicable'' 
compliance times in the subparagraphs. Paragraphs (g)(2) and (j)(2)(ii) 
of this supplemental NPRM are applicable only to airplanes that have 
not had Airbus Modification 26495 done in production.

Revised Applicability in Paragraph (g) of This Supplemental NPRM

    We have changed the applicability in paragraph (g) of this 
supplemental NPRM for clarity and we have added Model A320-111 
airplanes, which were inadvertently excluded from that paragraph in the 
original NPRM. Paragraph (g) is applicable to all airplanes identified 
in the existing AD, and Model A320-111 airplanes are included in that 
applicability.

FAA's Determination and Proposed Requirements of the Supplemental NPRM

    The changes discussed above expand the scope of the original NPRM; 
therefore, we have determined that it is necessary to reopen the 
comment period to provide additional opportunity for public comment on 
this supplemental NPRM.

Costs of Compliance

    The following table provides the estimated costs for U.S. operators 
to comply with this supplemental NPRM.

                                                                     Estimated Costs
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                                                                                                                   Number of U.S.-
               Action                  Work hours     Average labor          Parts            Cost per airplane      registered          Fleet cost
                                                      rate per hour                                                   airplanes
--------------------------------------------------------------------------------------------------------------------------------------------------------
Modification in AD 2006-04-06......              14             $80  The manufacturer       $1,120...............             755  $845,600.
                                                                      states that it will
                                                                      supply required
                                                                      parts to operators
                                                                      at no cost.
Detailed inspection in AD 2006-04-                2              80  None.................  $160, per inspection              755  $120,800, per
 06.                                                                                         cycle.                                 inspection cycle.
General visual inspection (new                    1              80  None.................  $80, per inspection               741  $59,280, per
 action).                                                                                    cycle.                                 inspection cycle.
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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.
    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

[[Page 9883]]

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 proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would 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 the proposed 
regulation:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the 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 supplemental NPRM 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, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

    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]

    2. The Federal Aviation Administration (FAA) amends Sec.  39.13 by 
removing amendment 39-14487 (71 FR 8439, February 17, 2006) and adding 
the following new airworthiness directive (AD):

Airbus: Docket No.: FAA-2006-25658; Directorate Identifier 2006-NM-
054-AD.

Comments Due Date

    (a) The FAA must receive comments on this AD action by April 2, 
2007.

Affected ADs

    (b) This AD supersedes AD 2006-04-06.

Applicability

    (c) This AD applies to the airplanes identified in paragraphs 
(c)(1) and (c)(2) of this AD, certificated in any category.
    (1) Airbus Model A318-111 and -112 airplanes on which Airbus 
Modification 26495 has been incorporated in production.
    (2) All Airbus Model A319-111, -112, -113, -114, -115, -131, -
132, and -133 airplanes; Model A320-111 airplanes; Model A320-211, -
212, -214, -231, -232, and -233 airplanes; and Model A321-111, -112, 
-131, -211, and -231 airplanes.

Unsafe Condition

    (d) This AD results from a determination that certain airplanes 
must be included in the applicability of the AD, and that the 
inspection type must be revised. We are issuing this AD to detect 
and correct wear of the inboard flap trunnions, which could lead to 
loss of flap surface control and consequently result in the flap 
detaching from the airplane. A detached flap could result in damage 
to the tail of the airplane.

Compliance

    (e) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

Restatement of Requirements of AD 2006-04-06

Modification

    (f) For Model A319-111, -112, -113, -114, -115, -131, -132, and 
-133 airplanes; Model A320-111 airplanes; Model A320-211, -212, -
214, -231, -232, and -233 airplanes; and Model A321-111, -112, and -
131 airplanes; except those on which Airbus Modification 26495 has 
been accomplished in production: Within 18 months after January 8, 
2001 (the effective date of AD 2000-24-02, amendment 39-12009), 
modify the sliding panel driving mechanism of the flap drive 
trunnions, in accordance with Airbus Service Bulletin A320-27-1117, 
Revision 02, dated January 18, 2000; or Revision 04, dated November 
6, 2001. As of the effective date of this AD, only Revision 04 may 
be used.

    Note 1: Accomplishment of the modification required by paragraph 
(f) of this AD before January 8, 2001, in accordance with Airbus 
Service Bulletin A320-27-1117, dated July 31, 1997; or Revision 01, 
dated June 25, 1999; is acceptable for compliance with that 
paragraph.

Detailed Inspections

    (g) For Model A318-111 and -112 airplanes; Model A319-111, -112, 
-113, -114, -115, -131, -132, and -133 airplanes; Model A320-111 
airplanes; Model A320-211, -212, -214, -231, -232, and -233 
airplanes; and Model A321-111, -112, and -131 airplanes: At the 
latest of the applicable times specified in paragraphs (g)(1), 
(g)(2), and (g)(3) of this AD, do a detailed inspection of the 
inboard flap trunnions for any wear marks and of the sliding panels 
for any cracking at the long edges, and do any corrective actions, 
as applicable, by accomplishing all of the applicable actions 
specified in the Accomplishment Instructions of Airbus Service 
Bulletin A320-57-1133, dated July 28, 2005; or Revision 01, dated 
August 7, 2006; except as provided by paragraph (p) of this AD. As 
of the effective date of this AD, only Revision 01 may be used. Any 
corrective actions must be done at the compliance times specified in 
Figures 5 and 6, as applicable, of the service bulletin; except as 
provided by paragraphs (m), (n), and (o) of this AD. Repeat the 
inspection thereafter at intervals not to exceed 4,000 flight hours 
until the inspection required by paragraph (j) of this AD is done.

    Note 2: For the purposes of this AD, a detailed inspection is: 
``An intensive examination of a specific item, installation, or 
assembly to detect damage, failure, or irregularity. Available 
lighting is normally supplemented with a direct source of good 
lighting at an intensity deemed appropriate. Inspection aids such as 
mirror, magnifying lenses, etc., may be necessary. Surface cleaning 
and elaborate procedures may be required.''

    (1) Before accumulating 4,000 total flight hours on the inboard 
flap trunnion since new.
    (2) Within 4,000 flight hours after accomplishing paragraph (f) 
of this AD.
    (3) Within 600 flight hours after March 24, 2006 (the effective 
date of AD 2006-04-06).

New Requirements of This AD

Modification

    (h) For Model A321-211 and -231 airplanes, except those on which 
Airbus Modification 26495 has been accomplished in production: 
Within 18 months after the effective date of this AD, modify the 
sliding panel driving mechanism of the flap drive trunnions, in 
accordance with Airbus Service Bulletin A320-27-1117, Revision 04, 
dated November 6, 2001.
    (i) Accomplishing the modification specified in paragraph (h) of 
this AD is acceptable for compliance with the requirements of that 
paragraph if done before the effective date of this AD in accordance 
with the applicable service bulletin identified in Table 1 of this 
AD.

                                       Table 1.--Airbus Service Bulletins
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           Service Bulletin                        Revision level                            Date
----------------------------------------------------------------------------------------------------------------
A320-27-1117..........................  Original...........................  July 31, 1997.
A320-27-1117..........................  Revision 01........................  June 25, 1999.
A320-27-1117..........................  Revision 02........................  January 18, 2000.

[[Page 9884]]

 
A320-27-1117..........................  Revision 03........................  August 24, 2001.
----------------------------------------------------------------------------------------------------------------

General Visual Inspections

    (j) For all airplanes: At the time specified in paragraph (j)(1) 
or (j)(2) of this AD, as applicable, do a general visual inspection 
of the inboard flap trunnions for any wear marks and of the sliding 
panels for any cracking at the long edges, and do all applicable 
corrective actions, by accomplishing all of the applicable actions 
specified in the Accomplishment Instructions of Airbus Service 
Bulletin A320-57-1133, Revision 01, dated August 7, 2006; except as 
provided by paragraph (p) of this AD. All corrective actions must be 
done at the compliance times specified in Figures 5 and 6, as 
applicable, of the service bulletin; except as provided by 
paragraphs (m), (n), and (o) of this AD. Repeat the inspection 
thereafter at intervals not to exceed 4,000 flight hours. 
Accomplishment of the general visual inspection required by this 
paragraph terminates the detailed inspection requirement of 
paragraph (g) of this AD.

    Note 3: For the purposes of this AD, a general visual inspection 
is: ``A visual examination of an interior or exterior area, 
installation, or assembly to detect obvious damage, failure, or 
irregularity. This level of inspection is made from within touching 
distance unless otherwise specified. A mirror may be necessary to 
ensure visual access to all surfaces in the inspection area. This 
level of inspection is made under normally available lighting 
conditions such as daylight, hangar lighting, flashlight, or 
droplight and may require removal or opening of access panels or 
doors. Stands, ladders, or platforms may be required to gain 
proximity to the area being checked.''

    (1) For airplanes on which the detailed inspection required by 
paragraph (g) of this AD has been done before the effective date of 
this AD: Inspect before accumulating 4,000 total flight hours on the 
inboard flap trunnion since new, or within 4,000 flight hours after 
accomplishing the most recent inspection required by paragraph (g) 
of this AD, whichever occurs later.
    (2) For airplanes other than those identified in paragraph 
(j)(1) of this AD: Inspect at the latest of the applicable times 
specified in paragraphs (j)(2)(i), (j)(2)(ii), and (j)(2)(iii) of 
this AD.
    (i) Before accumulating 4,000 total flight hours on the inboard 
flap trunnion since new.
    (ii) Within 4,000 flight hours after accomplishing paragraph (f) 
or (h) of this AD.
    (iii) Within 600 flight hours after the effective date of this 
AD.

Actions Accomplished According to Previous Issue of Service 
Bulletins

    (k) Accomplishment of the modification required by paragraph (f) 
of this AD before the effective date of this AD, in accordance with 
Airbus Service Bulletin A320-27-1117, Revision 03, dated August 24, 
2001, is acceptable for compliance with the requirements of that 
paragraph.
    (l) Accomplishment of the inspections required by paragraph (j) 
of this AD before the effective date of this AD, in accordance with 
Airbus Service Bulletin A320-57-1133, dated July 28, 2005, is 
acceptable for compliance with the requirements of that paragraph.

Compliance Times

    (m) Where Airbus Service Bulletins A320-57-1133, dated July 28, 
2005; and Revision 01, dated August 7, 2006; specify replacing the 
sliding panel at the next opportunity if damaged, replace it within 
600 flight hours after the inspection required by paragraph (g) or 
(j) of this AD, as applicable.
    (n) If any damage to the trunnion is found during any inspection 
required by paragraph (g) or (j) of this AD, before further flight, 
do the corrective actions specified in Airbus Service Bulletin A320-
57-1133, dated July 28, 2005; or Revision 01, dated August 7, 2006. 
As of the effective date of this AD, only Revision 01 may be used.

Grace Period Assessment

    (o) Where Airbus Service Bulletins A320-57-1133, dated July 28, 
2005; and Revision 01, dated August 7, 2006; specify contacting the 
manufacturer for a grace period assessment after replacing the 
trunnion or flap, contact the Manager, International Branch, ANM-
116, Transport Airplane Directorate, FAA; the Direction 
Ge[acute]ne[acute]rale de l'Aviation Civile; or the European 
Aviation Safety Agency (or its delegated agent); for the grace 
period assessment.

No Reporting Requirement

    (p) Although Airbus Service Bulletins A320-57-1133, dated July 
28, 2005; and Revision 01, dated August 7, 2006; specify to submit 
certain information to the manufacturer, this AD does not include 
that requirement.

Alternative Methods of Compliance (AMOCs)

    (q)(1) The Manager, International Branch, ANM-116, has the 
authority to approve AMOCs for this AD, if requested in accordance 
with the procedures found in 14 CFR 39.19.
    (2) Before using any AMOC approved in accordance with 14 CFR 
39.19 on any airplane to which the AMOC applies, notify the 
appropriate principal inspector in the FAA Flight Standards 
Certificate Holding District Office.

Related Information

    (r) French airworthiness directive F-2005-139, dated August 3, 
2005, also addresses the subject of this AD.

    Issued in Renton, Washington, on February 23, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.

[FR Doc. E7-3841 Filed 3-5-07; 8:45 am]
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