Airworthiness Directives; Boeing Model 737-600, -700, -700C, -800, and -900 Series Airplanes, 16019-16021 [06-2958]
Download as PDF
<![CDATA[
Federal Register / Vol. 71, No. 61 / Thursday, March 30, 2006 / Rules and Regulations
DEPARTMENT OF TRANSPORTATION
could allow flammable fluids to build
up in the cavity of the aft fairing, and
consequently could be ignited by the
engine exhaust nozzle located below the
engine strut, resulting in an explosion or
uncontrolled fire.
DATES: This AD becomes effective May
4, 2006.
The Director of the Federal Register
approved the incorporation by reference
of certain publications listed in the AD
as of May 4, 2006.
ADDRESSES: You may examine the AD
docket on the Internet at https://
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:
Doug Pegors, Aerospace Engineer,
Propulsion Branch, ANM–140S, FAA,
Seattle Aircraft Certification Office,
1601 Lind Avenue, SW., Renton,
Washington 98055–4056; telephone
(425) 917–6504; fax (425) 917–6590.
SUPPLEMENTARY INFORMATION:
Federal Aviation Administration
Examining the Docket
finalizing the interim final rules,
without change, as published in the
Federal Register (70 FR 55713,
September 23, 2005, and 70 FR 72355,
December 5, 2005) will tend to
effectuate the declared policy of the Act.
List of Subjects in 7 CFR Part 985
Marketing agreements, Oils and fats,
Reporting and recordkeeping
requirements, Spearmint oil.
PART 985—MARKETING ORDER
REGULATING THE HANDLING OF
SPEARMINT OIL PRODUCED IN THE
FAR WEST
Accordingly, the interim final rules
amending 7 CFR part 985, which were
published at 70 FR 55713 on September
23, 2005 and 70 FR 72355 on December
5, 2005, are adopted as a final rule
without change.
I
Dated: March 27, 2006.
Lloyd C. Day,
Administrator, Agricultural Marketing
Service.
[FR Doc. 06–3080 Filed 3–29–06; 8:45 am]
BILLING CODE 3410–02–P
14 CFR Part 39
[Docket No. FAA–2005–20110; Directorate
Identifier 2004–NM–114–AD; Amendment
39–14531; AD 2006–07–04]
RIN 2120–AA64
Airworthiness Directives; Boeing
Model 737–600, –700, –700C, –800, and
–900 Series Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
cprice-sewell on PROD1PC66 with RULES
AGENCY:
Discussion
SUMMARY: The FAA is adopting a new
airworthiness directive (AD) for certain
Boeing Model 737–600, –700, –700C,
–800, and –900 series airplanes. This
AD requires repetitive general visual
inspections for dirt, debris, and drain
blockage and cleaning of the aft fairing
cavities of the engine struts; and
modification of the aft fairings, which
terminates the repetitive general visual
inspections. This AD results from a
report indicating that water had
accumulated in the cavities of the
engine strut aft fairings. We are issuing
this AD to prevent drain blockage by
debris that, when combined with
leaking, flammable fluid lines passing
through the engine strut aft fairing,
VerDate Aug<31>2005
15:18 Mar 29, 2006
Jkt 208001
You may examine the airworthiness
directive (AD) docket on the Internet at
https://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.
The FAA issued a notice of proposed
rulemaking (NPRM) to amend 14 CFR
part 39 to include an AD that would
apply to certain Boeing Model 737–600,
–700, –700C, –800, and –900 series
airplanes. That NPRM was published in
the Federal Register on January 24,
2005 (70 FR 3320). That NPRM
proposed to require repetitive general
visual inspections for dirt, debris, and
drain blockage and cleaning of the aft
fairing cavities of the engine struts; and
modification of the aft fairings, which
would terminate the repetitive general
visual inspections.
Comments
We provided the public the
opportunity to participate in the
development of this AD. We have
considered the comments received.
PO 00000
Frm 00005
Fmt 4700
Sfmt 4700
16019
Support for NPRM
Southwest Airlines and AirTran
Airways support the NPRM.
Request To Revise Dimension Between
Certain Fastener Holes
Alaska Airlines requests that we
revise the dimension between certain
fastener holes specified in Figures 3, 4,
5, and 6 of Boeing Special Attention
Service Bulletin 737–54–1041, dated
January 22, 2004. Alaska Airlines states
that the dimension between an existing
fastener hole and the new fastener hole
is called out in the ten-thousandths
(1.6772 inches); any deviation from this
exact measurement would require
approval of an alternative method of
compliance (AMOC). Alaska Airlines
suggests dimensions of 1.67 or 1.68
inches with a standard tolerance of
±0.03 inch. If we cannot revise the
dimension, the commenter instead
requests that we clarify why such a tight
tolerance would be required.
We agree with Alaska Airlines’
request, since there is no technical
justification for requiring such a tight
tolerance between fastener holes. Since
issuance of the NPRM, Boeing has
published Service Bulletin 737–54–
1041, Revision 1, dated December 1,
2005. The procedures in Revision 1 of
the service bulletin are essentially the
same as those in the original issue,
dated January 22, 2004, which we
referenced in the NPRM as the
appropriate source of service
information. Revision 1 allows a
dimension of 1.647 inches to 1.707
inches between fastener holes.
Therefore, we have revised this AD to
also allow use of Revision 1 for
accomplishing the actions specified in
this AD. We have also revised paragraph
(c) of this AD to reference Revision 1.
Since the effectivity of Revision 1 is the
same as the effectivity of the original
issue, the applicability of this AD has
not changed.
Clarification of 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 comments
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.
E:\FR\FM\30MRR1.SGM
30MRR1
16020
Federal Register / Vol. 71, No. 61 / Thursday, March 30, 2006 / Rules and Regulations
Costs of Compliance
This AD affects about 1,406 airplanes
worldwide and about 549 U.S.-
registered airplanes. The following table
provides the estimated costs for U.S.
operators to comply with this AD.
ESTIMATED COSTS
Action
Work hours
Inspection, per inspection cycle.
Modification ..................
Average
labor rate
per hour
None ...........................
5
65
$294 ............................
cprice-sewell on PROD1PC66 with RULES
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.
15:18 Mar 29, 2006
$130, per inspection
cycle.
$619 ............................
$65
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.
VerDate Aug<31>2005
Cost per
airplane
2
Authority for This Rulemaking
Jkt 208001
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Incorporation by reference,
Safety.
Adoption of the Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA amends 14 CFR part 39 as
follows:
I
PART 39—AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:
I
Authority: 49 U.S.C. 106(g), 40113, 44701.
§ 39.13
[Amended]
2. The Federal Aviation
Administration (FAA) amends § 39.13
by adding the following new
airworthiness directive (AD):
I
2006–07–04 Boeing: Amendment 39–14531.
Docket No. FAA–2005–20110;
Directorate Identifier 2004–NM–114–AD.
Effective Date
(a) This AD becomes effective May 4, 2006.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Boeing Model 737–
600, –700, –700C, –800, and –900 series
airplanes, certificated in any category; as
listed in Boeing Service Bulletin 737–54–
1041, Revision 1, dated December 1, 2005.
Unsafe Condition
(d) This AD was prompted by a report
indicating that water had accumulated in the
cavities of the engine strut aft fairings. We are
issuing this AD to prevent drain blockage by
debris that, when combined with leaking,
flammable fluid lines passing through the
engine strut aft fairing, could allow
flammable fluids to build up in the cavity of
the aft fairing, and consequently could be
ignited by the engine exhaust nozzle located
below the engine strut, resulting in an
explosion or uncontrolled fire.
Compliance
(e) You are responsible for having the
actions required by this AD performed within
PO 00000
Number of
U.S.registered
airplanes
Parts
Frm 00006
Fmt 4700
Sfmt 4700
549
549
Fleet cost
$71,370, per inspection cycle.
$339,831.
the compliance times specified, unless the
actions have already been done.
Service Bulletin Reference
(f) The term ‘‘service bulletin,’’ as used in
this AD, means the Accomplishment
Instructions of Boeing Special Attention
Service Bulletin 737–54–1041, dated January
22, 2004; or Boeing Service Bulletin 737–54–
1041, Revision 1, dated December 1, 2005.
Repetitive Inspections of the Engine Strut Aft
Fairings
(g) Within 4,000 flight cycles or within 30
months after the effective date of this AD,
whichever occurs first: Do the actions
specified in paragraphs (g)(1) and (g)(2) of
this AD.
(1) Do a general visual inspection for dirt,
debris, and drain blockage and clean the aft
fairing cavity of the left engine strut, in
accordance with Part I of the service bulletin,
except as provided by paragraph (h) of this
AD. Thereafter at intervals not to exceed
4,000 flight cycles or 30 months, whichever
occurs first: Repeat the inspection until the
aft fairing of the left engine strut has been
modified in accordance with paragraph (i)(1)
of this AD.
(2) Do a general visual inspection for dirt,
debris, and drain blockage and clean the aft
fairing cavity of the right engine strut, in
accordance with Part II of the service
bulletin, except as provided by paragraph (h)
of this AD. Thereafter at intervals not to
exceed 4,000 flight cycles or 30 months,
whichever occurs first: Repeat the inspection
until the aft fairing of the right engine strut
has been modified in accordance with
paragraph (i)(2) of this AD.
Note 1: 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.’’
E:\FR\FM\30MRR1.SGM
30MRR1
Federal Register / Vol. 71, No. 61 / Thursday, March 30, 2006 / Rules and Regulations
Approved Equivalent Procedure
(h) If the service bulletin specifies that the
general visual inspection and cleaning of the
aft fairing cavity of the left or right engine
strut may be accomplished per an ‘‘approved
equivalent procedure’’: The general visual
inspection or cleaning must be accomplished
in accordance with the chapter of the Boeing
737–600/700/800/900 Airplane Maintenance
Manual specified in the service bulletin.
Modification of the Engine Strut Aft Fairings
(i) Within 9,000 flight cycles after the
effective date of this AD, do the actions
specified in paragraphs (i)(1) and (i)(2) of this
AD.
(1) Modify the aft fairing of the left engine
strut, in accordance with Part III of the
service bulletin; and after accomplishing the
modification but before further flight, inspect
and clean the drain system of the aft fairing
in accordance with Part I of the service
bulletin. This modification terminates the
repetitive inspections required by paragraph
(g)(1) of this AD.
(2) Modify the aft fairing of the right engine
strut, in accordance with Part IV of the
service bulletin; and after accomplishing the
modification but before further flight, inspect
and clean the drain system of the aft fairing
in accordance with Part II of the service
bulletin. This modification terminates the
repetitive inspections required by paragraph
(g)(2) of this AD.
Alternative Methods of Compliance
(AMOCs)
(j)(1) The Manager, Seattle Aircraft
Certification Office, 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 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.
cprice-sewell on PROD1PC66 with RULES
Material Incorporated by Reference
(k) You must use Boeing Special Attention
Service Bulletin 737–54–1041, dated January
22, 2004; or Boeing Service Bulletin 737–54–
1041, Revision 1, dated December 1, 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 these
documents in accordance with 5 U.S.C.
552(a) and 1 CFR part 51. Contact Boeing
Commercial Airplanes, P.O. Box 3707,
Seattle, Washington 98124–2207, 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
https://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 https://www.archives.gov/
federal_register/code_of_federal_regulations/
ibr_locations.html.
VerDate Aug<31>2005
15:18 Mar 29, 2006
Jkt 208001
Issued in Renton, Washington, on March
17, 2006.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. 06–2958 Filed 3–29–06; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2005–22456; Directorate
Identifier 2005–NM–128–AD; Amendment
39–14530; AD 2006–07–03]
RIN 2120–AA64
Airworthiness Directives; Airbus Model
A321–100 and –200 Series Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
AGENCY:
SUMMARY: The FAA is adopting a new
airworthiness directive (AD) for certain
Airbus Model A321–100 and –200 series
airplanes. This AD requires replacing
the crashworthiness pins on the sidestay of the main landing gear (MLG)
with new pins having an increased
internal notch diameter. This AD results
from testing on the side-stay
crashworthiness pins on the MLG,
which revealed that, in the case of an
emergency landing, the crashworthiness
pins installed will not ensure a correct
MLG collapse. We are issuing this AD
to prevent a punctured fuel tank, which
could cause damage to the airplane or
injury to passengers.
DATES: This AD becomes effective May
4, 2006.
The Director of the Federal Register
approved the incorporation by reference
of a certain publication listed in the AD
as of May 4, 2006.
ADDRESSES: You may examine the AD
docket on the Internet at https://
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 Airbus, 1 Rond Point Maurice
Bellonte, 31707 Blagnac Cedex, France,
for service information identified in this
AD.
FOR FURTHER INFORMATION CONTACT: Dan
Rodina, Aerospace Engineer,
International Branch, ANM–116, FAA,
Transport Airplane Directorate, 1601
Lind Avenue, SW., Renton, Washington
98055–4056; telephone (425) 227–2125;
fax (425) 227–1149.
PO 00000
Frm 00007
Fmt 4700
Sfmt 4700
16021
SUPPLEMENTARY INFORMATION:
Examining the Docket
You may examine the airworthiness
directive (AD) docket on the Internet at
https://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 would
apply to certain Airbus Model A321–
100 and –200 series airplanes. That
NPRM was published in the Federal
Register on September 19, 2005 (70 FR
54854). That NPRM proposed to require
replacing the crashworthiness pins on
the side-stay of the main landing gear
(MLG) with new pins having an
increased internal notch diameter.
Comments
We provided the public the
opportunity to participate in the
development of this AD. We have
considered the comments received.
Request To Refer to Parts Manufacturer
Approval (PMA) Parts
One commenter requests that we
change the language in the proposed AD
to permit installation of PMA equivalent
parts. The commenter notes that it is
possible that a new and improved PMA
version of the defective original part
may already exist in the marketplace.
The commenter states that the mandated
installation of a certain part number
‘‘places the AD in conflict with existing
law (FAR 21.303),’’ which permits the
installation of other (PMA) parts.
We infer that the commenter would
like the AD to permit installation of any
equivalent PMA parts so that it would
not be necessary for an operator to
request approval of an alternative
method of compliance (AMOC) in order
to install an ‘‘equivalent’’ PMA part.
Whether an alternative part is
‘‘equivalent’’ in adequately resolving the
unsafe condition can be determined
only on a case-by-case basis based on a
complete understanding of the unsafe
condition. We are not currently aware of
any such parts. According to our policy,
in order for operators to replace a part
with one that is not specified in the AD,
they must request an AMOC. This is
necessary so that we can make a specific
determination that an alternative part is
E:\FR\FM\30MRR1.SGM
30MRR1
]]>Agencies
[Federal Register Volume 71, Number 61 (Thursday, March 30, 2006)]
[Rules and Regulations]
[Pages 16019-16021]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 06-2958]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2005-20110; Directorate Identifier 2004-NM-114-AD;
Amendment 39-14531; AD 2006-07-04]
RIN 2120-AA64
Airworthiness Directives; Boeing Model 737-600, -700, -700C, -
800, and -900 Series Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain Boeing Model 737-600, -700, -700C, -800, and -900 series
airplanes. This AD requires repetitive general visual inspections for
dirt, debris, and drain blockage and cleaning of the aft fairing
cavities of the engine struts; and modification of the aft fairings,
which terminates the repetitive general visual inspections. This AD
results from a report indicating that water had accumulated in the
cavities of the engine strut aft fairings. We are issuing this AD to
prevent drain blockage by debris that, when combined with leaking,
flammable fluid lines passing through the engine strut aft fairing,
could allow flammable fluids to build up in the cavity of the aft
fairing, and consequently could be ignited by the engine exhaust nozzle
located below the engine strut, resulting in an explosion or
uncontrolled fire.
DATES: This AD becomes effective May 4, 2006.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in the AD as of May 4, 2006.
ADDRESSES: You may examine the AD docket on the Internet at https://
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: Doug Pegors, Aerospace Engineer,
Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification
Office, 1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone
(425) 917-6504; fax (425) 917-6590.
SUPPLEMENTARY INFORMATION:
Examining the Docket
You may examine the airworthiness directive (AD) docket on the
Internet at https://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 would apply to certain Boeing Model
737-600, -700, -700C, -800, and -900 series airplanes. That NPRM was
published in the Federal Register on January 24, 2005 (70 FR 3320).
That NPRM proposed to require repetitive general visual inspections for
dirt, debris, and drain blockage and cleaning of the aft fairing
cavities of the engine struts; and modification of the aft fairings,
which would terminate the repetitive general visual inspections.
Comments
We provided the public the opportunity to participate in the
development of this AD. We have considered the comments received.
Support for NPRM
Southwest Airlines and AirTran Airways support the NPRM.
Request To Revise Dimension Between Certain Fastener Holes
Alaska Airlines requests that we revise the dimension between
certain fastener holes specified in Figures 3, 4, 5, and 6 of Boeing
Special Attention Service Bulletin 737-54-1041, dated January 22, 2004.
Alaska Airlines states that the dimension between an existing fastener
hole and the new fastener hole is called out in the ten-thousandths
(1.6772 inches); any deviation from this exact measurement would
require approval of an alternative method of compliance (AMOC). Alaska
Airlines suggests dimensions of 1.67 or 1.68 inches with a standard
tolerance of 0.03 inch. If we cannot revise the dimension,
the commenter instead requests that we clarify why such a tight
tolerance would be required.
We agree with Alaska Airlines' request, since there is no technical
justification for requiring such a tight tolerance between fastener
holes. Since issuance of the NPRM, Boeing has published Service
Bulletin 737-54-1041, Revision 1, dated December 1, 2005. The
procedures in Revision 1 of the service bulletin are essentially the
same as those in the original issue, dated January 22, 2004, which we
referenced in the NPRM as the appropriate source of service
information. Revision 1 allows a dimension of 1.647 inches to 1.707
inches between fastener holes. Therefore, we have revised this AD to
also allow use of Revision 1 for accomplishing the actions specified in
this AD. We have also revised paragraph (c) of this AD to reference
Revision 1. Since the effectivity of Revision 1 is the same as the
effectivity of the original issue, the applicability of this AD has not
changed.
Clarification of 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
comments 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.
[[Page 16020]]
Costs of Compliance
This AD affects about 1,406 airplanes worldwide and about 549 U.S.-
registered airplanes. The following table provides the estimated costs
for U.S. operators to comply with this AD.
Estimated Costs
--------------------------------------------------------------------------------------------------------------------------------------------------------
Number of
Average U.S.-
Action Work hours labor rate Parts Cost per airplane registered Fleet cost
per hour airplanes
--------------------------------------------------------------------------------------------------------------------------------------------------------
Inspection, per inspection cycle..... 2 $65 None.................... $130, per inspection 549 $71,370, per inspection
cycle. cycle.
Modification......................... 5 65 $294.................... $619................... 549 $339,831.
--------------------------------------------------------------------------------------------------------------------------------------------------------
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.
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
adding the following new airworthiness directive (AD):
2006-07-04 Boeing: Amendment 39-14531. Docket No. FAA-2005-20110;
Directorate Identifier 2004-NM-114-AD.
Effective Date
(a) This AD becomes effective May 4, 2006.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Boeing Model 737-600, -700, -700C, -800,
and -900 series airplanes, certificated in any category; as listed
in Boeing Service Bulletin 737-54-1041, Revision 1, dated December
1, 2005.
Unsafe Condition
(d) This AD was prompted by a report indicating that water had
accumulated in the cavities of the engine strut aft fairings. We are
issuing this AD to prevent drain blockage by debris that, when
combined with leaking, flammable fluid lines passing through the
engine strut aft fairing, could allow flammable fluids to build up
in the cavity of the aft fairing, and consequently could be ignited
by the engine exhaust nozzle located below the engine strut,
resulting in an explosion or uncontrolled fire.
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.
Service Bulletin Reference
(f) The term ``service bulletin,'' as used in this AD, means the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 737-54-1041, dated January 22, 2004; or Boeing Service
Bulletin 737-54-1041, Revision 1, dated December 1, 2005.
Repetitive Inspections of the Engine Strut Aft Fairings
(g) Within 4,000 flight cycles or within 30 months after the
effective date of this AD, whichever occurs first: Do the actions
specified in paragraphs (g)(1) and (g)(2) of this AD.
(1) Do a general visual inspection for dirt, debris, and drain
blockage and clean the aft fairing cavity of the left engine strut,
in accordance with Part I of the service bulletin, except as
provided by paragraph (h) of this AD. Thereafter at intervals not to
exceed 4,000 flight cycles or 30 months, whichever occurs first:
Repeat the inspection until the aft fairing of the left engine strut
has been modified in accordance with paragraph (i)(1) of this AD.
(2) Do a general visual inspection for dirt, debris, and drain
blockage and clean the aft fairing cavity of the right engine strut,
in accordance with Part II of the service bulletin, except as
provided by paragraph (h) of this AD. Thereafter at intervals not to
exceed 4,000 flight cycles or 30 months, whichever occurs first:
Repeat the inspection until the aft fairing of the right engine
strut has been modified in accordance with paragraph (i)(2) of this
AD.
Note 1: 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.''
[[Page 16021]]
Approved Equivalent Procedure
(h) If the service bulletin specifies that the general visual
inspection and cleaning of the aft fairing cavity of the left or
right engine strut may be accomplished per an ``approved equivalent
procedure'': The general visual inspection or cleaning must be
accomplished in accordance with the chapter of the Boeing 737-600/
700/800/900 Airplane Maintenance Manual specified in the service
bulletin.
Modification of the Engine Strut Aft Fairings
(i) Within 9,000 flight cycles after the effective date of this
AD, do the actions specified in paragraphs (i)(1) and (i)(2) of this
AD.
(1) Modify the aft fairing of the left engine strut, in
accordance with Part III of the service bulletin; and after
accomplishing the modification but before further flight, inspect
and clean the drain system of the aft fairing in accordance with
Part I of the service bulletin. This modification terminates the
repetitive inspections required by paragraph (g)(1) of this AD.
(2) Modify the aft fairing of the right engine strut, in
accordance with Part IV of the service bulletin; and after
accomplishing the modification but before further flight, inspect
and clean the drain system of the aft fairing in accordance with
Part II of the service bulletin. This modification terminates the
repetitive inspections required by paragraph (g)(2) of this AD.
Alternative Methods of Compliance (AMOCs)
(j)(1) The Manager, Seattle Aircraft Certification Office, 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 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.
Material Incorporated by Reference
(k) You must use Boeing Special Attention Service Bulletin 737-
54-1041, dated January 22, 2004; or Boeing Service Bulletin 737-54-
1041, Revision 1, dated December 1, 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 these documents in accordance with 5 U.S.C. 552(a) and
1 CFR part 51. Contact Boeing Commercial Airplanes, P.O. Box 3707,
Seattle, Washington 98124-2207, 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 https://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 https://
www.archives.gov/federal_register/code_of_federal_regulations/
ibr_locations.html.
Issued in Renton, Washington, on March 17, 2006.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 06-2958 Filed 3-29-06; 8:45 am]
BILLING CODE 4910-13-P
