[Federal Register Volume 71, Number 132 (Tuesday, July 11, 2006)]
[Rules and Regulations]
[Pages 38979-38985]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 06-6051]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2006-24074; Directorate Identifier 2005-NM-213-AD; 
Amendment 39-14676; AD 2006-14-05]
RIN 2120-AA64


Airworthiness Directives; Bombardier Model CL-600-2C10 (Regional 
Jet Series 700, 701, and 702) Airplanes, Model CL-600-2D15 (Regional 
Jet Series 705) Airplanes, and Model CL-600-2D24 (Regional Jet Series 
900) 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 Bombardier Model CL-600-2C10 (Regional 
Jet Series 700 and 701) and CL-600-2D24 (Regional Jet Series 900) 
series airplanes. That AD currently requires repetitive detailed 
inspections for cracking or deformation, or pulled or missing 
fasteners, on the lower panel of the left- and right-hand main landing 
gear (MLG) doors, as applicable, and corrective actions if necessary. 
This new AD reduces the repetitive inspection interval for certain 
airplanes. This new AD also adds airplanes to the applicability. This 
AD results from a report of a MLG door departing from an airplane. We 
are issuing this AD to prevent failure of the lower panel of the MLG 
door, departure of the lower panel from the airplane, and consequent 
damage to airplane structure, which could adversely affect the 
airplane's continued safe flight and landing.

DATES: This AD becomes effective August 15, 2006.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in the AD as of August 15, 
2006.

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.

[[Page 38980]]

    Contact Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, 
Station Centre-ville, Montreal, Quebec H3C 3G9, Canada, for service 
information identified in this AD.

FOR FURTHER INFORMATION CONTACT: Richard Beckwith, Aerospace Engineer, 
Airframe and Propulsion Branch, ANE-171, FAA, New York Aircraft 
Certification Office, 1600 Stewart Avenue, suite 410, Westbury, New 
York 11590; telephone (516) 228-7302; fax (516) 794-5531.

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 2003-19-51, amendment 
39-13353 (68 FR 61615, October 29, 2003). The existing AD applies to 
certain Bombardier Model CL-600-2C10 (Regional Jet Series 700 and 701) 
and CL-600-2D24 (Regional Jet Series 900) series airplanes (originally 
issued September 17, 2003, as an emergency airworthiness directive). 
That NPRM was published in the Federal Register on March 7, 2006 (71 FR 
11335). That NPRM proposed to continue to require repetitive detailed 
inspections for cracking or deformation, or pulled or missing 
fasteners, on the lower panel of the left- and right-hand main landing 
gear (MLG) doors, as applicable, and corrective actions if necessary. 
That NPRM also proposed to reduce the repetitive inspection interval 
for certain airplanes and to add airplanes to the applicability.

Comments

    We provided the public the opportunity to participate in the 
development of this AD. No comments have been received on the NPRM or 
on the determination of the cost to the public.

Revision of Corrective Action Paragraph (i)(2)

    We have revised paragraph (i)(2) of this AD to specify that the 
replacement be done in accordance with a method approved by the 
Manager, New York Aircraft Certification Office (ACO), FAA; or 
Transport Canada Civil Aviation (TCCA) (or its delegated agent), and 
that doing the replacement in accordance with Task Cards 32-12-01-000-
801-A01 and 32-12-01-400-801-A01 of the CRJ 700/900 Series Regional Jet 
Aircraft Maintenance Manual is one approved method.

Clarification of Paragraph (k) Requirements

    We have revised paragraph (k) of this AD to clarify that 
inspections must be done on installed door(s) that have previously been 
inspected in accordance with paragraph (g).

Clarification of AFM Reference

    We have revised the AFM reference specified in paragraphs (m)(2)(i) 
and (m)(2)(ii) of this AD.

Conclusion

    We have carefully reviewed the available data, 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.

Interim Action

    We consider this AD interim action. If final action is later 
identified, we may consider further rulemaking then.

Costs of Compliance

    The following table provides the estimated costs for U.S. operators 
to comply with this AD. This affects about 213 airplanes of U.S. 
registry.

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                Number of
                                     Work     Average                             U.S.-
              Action                 hours   labor rate    Cost per airplane    registered       Fleet cost
                                              per hour                          airplanes
----------------------------------------------------------------------------------------------------------------
Inspections (required by AD 2003-        1          $65  $65, per inspection            83  $5,395, per
 19-51).                                                  cycle.                             inspection cycle.
Inspections (new action)..........       1           65  $65, per inspection           213  $13,854, per
                                                          cycle.                             inspection cycle.
Revision (new action).............       1           65  $65, if necessary...          213  Up to $13,854.
----------------------------------------------------------------------------------------------------------------

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 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.

[[Page 38981]]

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 39-13353 (68 FR 61615, October 29, 2003) and by 
adding the following new airworthiness directive (AD):

2006-14-05 Bombardier, Inc. (Formerly Canadair): Amendment 39-14676. 
Docket No. FAA-2006-24074; Directorate Identifier 2005-NM-213-AD.

Effective Date

    (a) This AD becomes effective August 15, 2006.

Affected ADs

    (b) This AD supersedes AD 2003-19-51.

Applicability

    (c) This AD applies to Bombardier Model CL-600-2C10 (Regional 
Jet Series 700, 701, and 702) airplanes, serial numbers (S/Ns) 10003 
and subsequent; and Model CL-600-2D15 (Regional Jet Series 705) 
airplanes and Model CL-600-2D24 (Regional Jet Series 900) airplanes, 
S/Ns 15001 and subsequent; certificated in any category.

Unsafe Condition

    (d) This AD results from a report of a main landing gear (MLG) 
door departing from an airplane. We are issuing this AD to prevent 
failure of the lower panel of the MLG door, departure of the lower 
panel from the airplane, and consequent damage to airplane 
structure, which could adversely affect the airplane's continued 
safe flight and landing.

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 2003-19-51

Initial Compliance Time

    (f) For Model CL-600-2C10 (Regional Jet series 700 & 701) series 
airplanes, S/Ns 10003 through 10999 inclusive; and Model CL-600-2D24 
(Regional Jet series 900) series airplanes, S/Ns 15002 through 15990 
inclusive: Perform the initial inspection specified in paragraph (g) 
of this AD at the applicable time specified in paragraph (f)(1) or 
(f)(2) of this AD.
    (1) For airplanes with fewer than 1,500 total flight cycles as 
of November 3, 2003 (the effective date of AD 2003-19-51): Do the 
inspections before the accumulation of 1,050 total flight cycles, or 
within 50 flight cycles after the effective date of this AD, 
whichever is later.
    (2) For airplanes with 1,500 or more total flight cycles as of 
November 3, 2003: Do the inspections within 10 flight cycles after 
the effective date of this AD.

Inspections

    (g) For Model CL-600-2C10 (Regional Jet series 700 & 701) series 
airplanes, S/Ns 10003 through 10999 inclusive; and Model CL-600-2D24 
(Regional Jet series 900) series airplanes, S/Ns 15002 through 15990 
inclusive: At the applicable time specified in paragraph (f) of this 
AD, perform detailed inspections of the lower panel, part number (P/
N) CC670-10520, of the left- and right-hand MLG doors for the 
conditions and in the areas specified in paragraphs (g)(1), (g)(2), 
(g)(3), and (g)(4) of this AD; and Figures 1, 2, and 3 of this AD.

    Note 1: For the purposes of this AD, a detailed inspection is 
defined as: ``An intensive visual examination of a specific 
structural area, system, installation, or assembly to detect damage, 
failure, or irregularity. Available lighting is normally 
supplemented with a direct source of good lighting at intensity 
deemed appropriate by the inspector. Inspection aids such as mirror, 
magnifying lenses, etc., may be used. Surface cleaning and elaborate 
access procedures may be required.''

    (1) Inspect the cross member, P/N CC670-10572, of the MLG door 
lower panel for cracking or deformation, in accordance with Figure 2 
of this AD.
    (2) Inspect the inner skin, P/N CC670-10577, of the MLG door 
lower panel at the cross member (P/N CC670-10572) for cracking or 
deformation, or pulled or missing fasteners, in accordance with 
Figure 2 of this AD.
    (3) Inspect the outer skin, P/N CC670-10574, of the MLG door 
lower panel at the cross member (P/N CC670-10572) for cracking or 
deformation, or pulled or missing fasteners, in accordance with 
Figure 2 of this AD.
    (4) Inspect the forward member, P/N CC670-10570, and aft member, 
P/N CC670-10571, of the MLG door lower panel for cracking or 
deformation, or pulled or missing fasteners, in accordance with 
Figure 3 of this AD. Figures 1 through 3 of this AD follow.

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Repetitive Inspections

    (h) If no cracking or deformation, or pulled or missing 
fastener, as applicable, is found during any inspection required by 
paragraph (g) or (h) of this AD, repeat the inspections thereafter 
at intervals not to exceed 100 flight cycles.

Corrective Actions

    (i) If any cracking or deformation, or pulled or missing 
fastener, as applicable, is found during any inspection done in 
accordance with paragraph (g) or (h) of this AD: Before further 
flight, accomplish paragraph (i)(1), (i)(2), or (i)(3) of this AD.
    (1) Repair the damage in accordance with a method approved by 
either the Manager, New York Aircraft Certification Office (ACO), 
FAA; or Transport Canada Civil Aviation (TCCA) (or its delegated 
agent); and accomplish repetitive inspections in accordance with a 
method and at a repetitive interval approved by same.
    (2) Replace the lower panel assembly, P/N CC670-10520, of the 
affected MLG door with a new or serviceable lower panel assembly 
having the same P/N, according to a method approved by either the 
Manager, New York ACO, FAA; or TCCA (or its delegated agent). Task 
Cards 32-12-01-000-801-A01 and 32-12-01-400-801-A01 of the CRJ 700/
900 Series Regional Jet Aircraft Maintenance Manual are one approved 
method of doing the replacement. Repeat the inspections specified in 
paragraph (g) of this AD at intervals not to exceed 100 flight 
cycles.
    (3) Remove the lower panel assembly, P/N CC670-10520, of the 
affected MLG door, and accomplish paragraph (i)(3)(i) or (i)(3)(ii), 
as applicable.
    (i) For Model CL600-2C10 (Regional Jet series 700 & 701) series 
airplanes: Revise the Configuration Deviation List (CDL), Appendix 
1, of the airplane flight manual (AFM), to include the following 
limitations. This may be accomplished by inserting a copy of this AD 
into the CDL of the AFM.
    ``For Model CL600-2C10 series airplanes: If one or both door 
panel assemblies, part number CC670-10520, is missing:
    (1) Take-off Weight is reduced by 202.5 kg/door, or 450 lb/door
    (2) Enroute Climb Weight is reduced by 445.5 kg/door, or 990 lb/
door
    (3) Landing Weight is reduced by 202.5 kg/door, or 450 lb/door
    (4) Fuel Consumption is increased by +3.42% on fuel used/door
    (5) Cruise Airspeed is limited to not more than 0.78 Mach.''
    (ii) For Model CL-600-2D24 (Regional Jet series 900) series 
airplanes: Revise the CDL, Appendix 1, of the AFM, to include the 
following limitations. This may be accomplished by inserting a copy 
of this AD into the CDL of the AFM.
    ``For Model CL600-2D24 series airplanes: If one or both door 
panel assemblies, part number CC670-10520, is missing:
    (1) Take-off Weight is reduced by 245 kg/door, or 540 lb/door
    (2) Enroute Climb Weight is reduced by 551 kg/door, or 1,215 lb/
door
    (3) Landing Weight is reduced by 245 kg/door, or 540 lb/door
    (4) Fuel Consumption is increased by +3.42% on fuel used/door
    (5) Cruise Airspeed is limited to not more than 0.78 Mach.''

New Requirements of This AD

Inboard MLG Door Inspections

    (j) For all airplanes on which an inspection has not been done 
in accordance with paragraph (g) of this AD on or before the 
effective date of this AD: At the applicable time specified in 
paragraph (j)(1) or (j)(2) of this AD, do the inspections of the 
left- and right-hand inboard MLG doors for damage in accordance with 
Part A of the Accomplishment Instructions of Bombardier Alert 
Service Bulletin A670BA-32-016, Revision A, dated June 7, 2005, 
excluding Appendix A, dated June 2, 2005, and including Appendix B, 
dated June 2, 2005. Doing the inspections required by this

[[Page 38984]]

paragraph terminates the actions required by paragraphs (f) through 
(i) of this AD.
    (1) For airplanes that have accumulated fewer than 1,500 total 
flight cycles as of the effective date of this AD: Before the 
accumulation of 1,000 total flight cycles or within 50 flight cycles 
after the effective date of this AD, whichever occurs later.
    (2) For airplanes that have accumulated 1,500 flight cycles or 
more as of the effective date of this AD: Within 10 flight cycles 
after the effective date of this AD.
    (k) For airplanes on which an inspection has been done in 
accordance with paragraph (g) of this AD on or before the effective 
date of this AD: At the applicable time specified in paragraph 
(k)(1) or (k)(2) of this AD, inspect installed door(s) as specified 
in paragraph (j) of this AD. Doing the inspections required by this 
paragraph terminates the actions required by paragraphs (f) through 
(i) of this AD.
    (1) For airplanes that are not subject to an approved 
alternative method of compliance (AMOC) that extends the inspection 
interval to 450 flight cycles: Within 100 flight cycles since the 
last inspection done in accordance with paragraph (g) of this AD.
    (2) For airplanes that are subject to an approved AMOC that 
extends the inspection interval to 450 flight cycles: At the earlier 
of the times specified in paragraphs (k)(2)(i) and (k)(2)(ii) of 
this AD:
    (i) Within 450 flight cycles since the last inspection done in 
accordance with paragraph (g) of this AD.
    (ii) Within 100 flight cycles since the last inspection done in 
accordance with paragraph (g) of this AD or within 50 cycles after 
the effective date of this AD, whichever occurs later.
    (l) If no damage is found during any inspection done in 
accordance with paragraph (j) of this AD, repeat the inspections 
specified in paragraph (j) of this AD thereafter at intervals not to 
exceed 100 flight cycles.

Corrective Action--Replace or Remove MLG Door

    (m) If any damage is found during any inspection done in 
accordance with paragraph (j) of this AD, before further flight, do 
the actions in paragraph (m)(1) or (m)(2) of this AD. Repeat the 
inspections specified in paragraph (j) of this AD thereafter at 
intervals not to exceed 100 flight cycles.
    (1) Replace the inboard MLG door with a new or repaired door in 
accordance with Part B of the Accomplishment Instructions of the 
Bombardier Alert Service Bulletin A670BA-32-016, Revision A, dated 
June 7, 2005, excluding Appendix A, dated June 2, 2005, and 
including Appendix B, dated June 2, 2005; except where the service 
bulletin specifies to contact the manufacturer for repair if no 
generic repair engineering order (REO) is available, before further 
flight, repair using a method approved by either the Manager, New 
York ACO, FAA; or the TCCA (or its delegated agent).
    (2) Remove the inboard MLG door in accordance with Part B of the 
Accomplishment Instructions of the Bombardier Alert Service Bulletin 
A670BA-32-016, Revision A, dated June 7, 2005, excluding Appendix A, 
dated June 2, 2005, and including Appendix B, dated June 2, 2005; 
and accomplish paragraph (m)(2)(i) or (m)(2)(ii), as applicable.
    (i) For Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) 
airplanes and Model CL-600-2D15 (Regional Jet Series 705) airplanes: 
Revise the Configuration Deviation List (CDL), Appendix 1, of the 
Bombardier Canadair Regional Jet AFM, to include the following 
limitations. This may be accomplished by inserting a copy of this AD 
into the CDL of the AFM. Remove any existing CDL limitation required 
by paragraph (i)(3)(i) of this AD from the AFM.
    ``For Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) 
airplanes and Model CL-600-2D15 (Regional Jet Series 705) airplanes: 
If one or both door panel assemblies, part number CC670-10520, is 
missing:
    (1) Take-off Weight is reduced by 202.5 kg/door, or 450 lb/door
    (2) Enroute Climb Weight is reduced by 445.5 kg/door, or 990 lb/
door
    (3) Landing Weight is reduced by 202.5 kg/door, or 450 lb/door
    (4) Fuel Consumption is increased by +2.5% on fuel used/door
    (5) Cruise Airspeed is limited to not more than 0.78 Mach
    (6) The climb ceiling obtained from the Flight Planning and 
Cruise Control Manual (FPCCM) must be reduced by 1,000 ft/door.''

    Note 2: When a statement with the information specified in 
paragraph (m)(2)(i) of this AD has been included in the general 
revisions of the AFM, the general revisions may be inserted into the 
AFM, and the copy of this AD may be removed from the AFM.

    (ii) For Model CL-600-2D24 (Regional Jet Series 900) airplanes: 
Revise the CDL, Appendix 1, of the Bombardier Canadair Regional Jet 
AFM, to include the following limitations. This may be accomplished 
by inserting a copy of this AD into the CDL of the AFM. Remove any 
existing CDL limitation required by paragraph (i)(3)(ii) of this AD 
from the AFM.
    ``For Model CL-600-2D24 (Regional Jet Series 900) airplanes: If 
one or both door panel assemblies, part number CC670-10520, is 
missing:
    (1) Take-off Weight is reduced by 245 kg/door, or 540 lb/door
    (2) Enroute Climb Weight is reduced by 551 kg/door, or 1,215 lb/
door
    (3) Landing Weight is reduced by 245 kg/door, or 540 lb/door
    (4) Fuel Consumption is increased by +2.5% on fuel used/door
    (5) Cruise Airspeed is limited to not more than 0.78 Mach
    (6) The climb ceiling obtained from the Flight Planning and 
Cruise Control Manual (FPCCM) must be reduced by 1,000 ft/door.''

    Note 3: When a statement with the information specified in 
paragraph (m)(2)(ii) of this AD has been included in the general 
revisions of the AFM, the general revisions may be inserted into the 
AFM, and the copy of this AD may be removed from the AFM.

Revise CDL

    (n) For airplanes on which the door(s) have been removed in 
accordance with paragraph (i)(3) of this AD: Within 30 days after 
the effective date of this AD, do the revision specified in 
paragraph (m)(2)(i) or (m)(2)(ii) of this AD, as applicable, and 
remove any revision required by paragraph (i)(3)(i) or (i)(3)(ii) of 
this AD.

No Reporting Required

    (o) Although Bombardier Alert Service Bulletin A670BA-32-016, 
Revision A, dated June 7, 2005, specifies to submit certain 
information to the manufacturer, this AD does not include that 
requirement.

Actions Accomplished According to Previous Issue of Service 
Bulletin

    (p) Actions accomplished before the effective date of this AD 
according to Bombardier Alert Service Bulletin A670BA-32-016, dated 
June 2, 2005, are considered acceptable for compliance with the 
corresponding action specified in this AD.

Alternative Methods of Compliance (AMOCs)

    (q)(1) The Manager, New York ACO, FAA, 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 Sec.  
39.19 on any airplane to which the AMOC applies, notify the 
appropriate principal inspector in the FAA Flight Standards 
Certificate Holding District Office.
    (3) AMOCs approved previously in accordance with AD 2003-19-51 
are not approved as AMOCs with this AD.

Related Information

    (r) Canadian airworthiness directive CF-2003-23R2, dated July 
27, 2005, also addresses the subject of this AD.

Material Incorporated by Reference

    (s) You must use Bombardier Alert Service Bulletin A670BA-32-
016, Revision A, dated June 7, 2005, excluding Appendix A, dated 
June 2, 2005, and including Appendix B, dated June 2, 2005, to 
perform the actions that are required by this AD, unless the AD 
specifies otherwise. The Director of the Federal Register approved 
the incorporation by reference of this document in accordance with 5 
U.S.C. 552(a) and 1 CFR part 51. Contact Bombardier, Inc., Canadair, 
Aerospace Group, P.O. Box 6087, Station Centre-ville, Montreal, 
Quebec H3C 3G9, Canada, for a copy of this service information. You 
may review copies at the Docket Management Facility, U.S. Department 
of Transportation, 400 Seventh Street, SW., Room PL-401, Nassif 
Building, Washington, DC; on the Internet at http://dms.dot.gov; or 
at the National Archives and Records Administration (NARA). For 
information on the availability of this material at the NARA, call 
(202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.


[[Page 38985]]


    Issued in Renton, Washington, on June 28, 2006.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 06-6051 Filed 7-10-06; 8:45 am]
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