[Federal Register Volume 75, Number 212 (Wednesday, November 3, 2010)]
[Proposed Rules]
[Pages 67637-67639]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-27745]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-1042; Directorate Identifier 2010-NM-094-AD]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Model 737-700, -
700C, -800, and -900ER Series Airplanes, Model 747-400F Series
Airplanes, and Model 767-200 and -300 Series Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: We propose to adopt a new airworthiness directive (AD) for
certain Model 737-700, -700C, -800, and -900ER series airplanes, Model
747-400F series airplanes, and Model 767-200 and -300 series airplanes.
This proposed AD would require an inspection for affected serial
numbers of the crew oxygen mask stowage box units; and replacement of
the crew oxygen mask stowage box unit with a new crew oxygen mask
stowage unit, if necessary. This proposed AD results
[[Page 67638]]
from reports indicating that certain crew oxygen mask stowage box units
were possibly delivered with a burr in the inlet fitting. The burr may
break loose during test or operation and may pose an ignition source or
cause an inlet valve to jam. We are proposing this AD to prevent an
ignition source, which could result in an oxygen-fed fire; or could
cause an inlet valve to jam in a crew oxygen mask stowage box unit,
which could result in restricted flow of oxygen.
DATES: We must receive comments on this proposed AD by December 20,
2010.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
Fax: 202-493-2251.
Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue, SE., Washington, DC 20590.
Hand Delivery: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays.
For service information identified in this proposed 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 [email protected];
Internet https://www.myboeingfleet.com. You may review copies of the
referenced 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.
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 proposed AD, the regulatory
evaluation, any comments received, and other information. The street
address for the Docket Office (telephone 800-647-5527) is in the
ADDRESSES section. Comments will be available in the AD docket shortly
after receipt.
FOR FURTHER INFORMATION CONTACT: Susan L. Monroe, Aerospace Engineer,
Cabin Safety and Environmental Systems Branch, ANM-150S, FAA, Seattle
Aircraft Certification Office (ACO), 1601 Lind Avenue, SW., Renton,
Washington 98057-3356; telephone (425) 917-6457; fax (425) 917-6590.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written relevant data, views, or
arguments about this proposed AD. Send your comments to an address
listed under the ADDRESSES section. Include ``Docket No. FAA-2010-1042;
Directorate Identifier 2010-NM-094-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD because of those comments.
We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this proposed AD.
Discussion
We received reports indicating that crew oxygen mask stowage box
units having part number (P/N) MXP147, MXP147-2, MXP147-3, MXP147-5,
MXP402, and MXP410-1, that were manufactured between July 12, 2007, and
November 20, 2007, were possibly delivered with a burr in the inlet
fitting. If not corrected, the burr may break loose during test or
operation and may pose an ignition source, which could result in an
oxygen-fed fire; or could cause an inlet valve to jam in an oxygen mask
stowage box unit, which could result in restricted flow of oxygen.
Relevant Service Information
We have reviewed Boeing Alert Service Bulletins 737-35A1121, dated
December 14, 2009; 747-35A2126, dated October 8, 2009; and 767-35A0057,
dated October 8, 2009. The service bulletins describe procedures for a
general visual inspection for affected serial numbers of the crew
oxygen mask stowage box units, and replacement of the affected crew
oxygen mask stowage box unit with a new crew oxygen mask stowage box
unit.
The service information refers to Intertechnique Service Bulletin
MXP1/4-35-175, dated September 11, 2009, for inspecting the serial
numbers of the crew oxygen mask stowage box units.
FAA's Determination and Requirements of This Proposed AD
We are proposing this AD because we evaluated all relevant
information and determined the unsafe condition described previously is
likely to exist or develop in other products of these same type
designs. This proposed AD would require accomplishing the actions
specified in the service information described previously.
Costs of Compliance
We estimate that this proposed AD would affect 40 airplanes of U.S.
registry. We also estimate that it would take about 1 work-hour per
product to comply with this proposed AD. The average labor rate is $85
per work-hour. Based on these figures, we estimate the cost of this
proposed AD to the U.S. operators to be $3,400, or $85 per product.
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 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 this 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,
[[Page 67639]]
on a substantial number of small entities under the criteria of the
Regulatory Flexibility Act.
You can find our regulatory evaluation and the estimated costs of
compliance in the AD Docket.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, 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 FAA amends Sec. 39.13 by adding the following new AD:
The Boeing Company: Docket No. FAA-2010-1042; Directorate Identifier
2010-NM-094-AD.
Comments Due Date
(a) We must receive comments by December 20, 2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to The Boeing Company airplanes,
certificated in any category, as identified in paragraphs (c)(1),
(c)(2), and (c)(3) of this AD.
(1) Model 737-700, -700C, -800, -900ER series airplanes, as
identified in Boeing Alert Service Bulletin 737-35A1121, dated
December 14, 2009.
(2) Model 747-400F series airplanes, as identified in Boeing
Alert Service Bulletin 747-35A2126, dated October 8, 2009.
(3) Model 767-200 and -300 series airplanes, as identified in
Boeing Alert Service Bulletin 767-35A0057, dated October 8, 2009.
Subject
(d) Air Transport Association (ATA) of America Code 35: Oxygen.
Unsafe Condition
(e) This AD results from reports indicating that certain crew
oxygen mask stowage box units were possibly delivered with a burr in
the inlet fitting. The Federal Aviation Administration is issuing
this AD to prevent an ignition source, which could result in an
oxygen-fed fire; or could cause an inlet valve to jam in an oxygen
mask stowage box unit, which could result in restricted flow of
oxygen.
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.
Inspection and Corrective Action
(g) Within 24 months after the effective date of this AD: Do a
general visual inspection to determine if the serial number of the
crew oxygen mask stowage box units is identified in the Appendix of
Intertechnique Service Bulletin MXP1/4-35-175, dated September 11,
2009, in accordance with the Accomplishment Instructions of the
applicable Boeing Alert Service Bulletin listed in Table 1 of this
AD. A review of airplane maintenance records is acceptable in lieu
of this inspection if the serial number of the crew oxygen mask
stowage box units can be conclusively determined from that review.
If any crew oxygen mask stowage box unit has a serial number
identified in the Appendix of Intertechnique Service Bulletin MXP1/
4-35-175, dated September 11, 2009: Before further flight, replace
the crew oxygen mask stowage box unit with a new unit, in accordance
with the Accomplishment Instructions of the applicable Boeing alert
service bulletin listed in Table 1 of this AD.
Table 1--Service Information
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Boeing airplane model Document Date
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737-700, -700C, -800, -900ER series Boeing Alert Service Bulletin December 14, 2009.
airplanes. 737-35A1121.
747-400F series airplanes............... Boeing Alert Service Bulletin October 8, 2009.
747-35A2126.
767-200 and -300 series airplanes....... Boeing Alert Service Bulletin October 8, 2009.
767-35A0057.
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Parts Installation
(h) As of the effective date of this AD, no person may install a
crew oxygen mask stowage box unit identified in the Appendix of
Intertechnique Service Bulletin MXP1/4-35-175, dated September 11,
2009, on any airplane.
Alternative Methods of Compliance (AMOCs)
(i)(1) The Manager, Seattle Aircraft Certification Office (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: Susan L. Monroe, Aerospace Engineer, Cabin Safety and
Environmental Systems Branch, ANM-150S, FAA, Seattle ACO, 1601 Lind
Avenue, SW., Renton, Washington 98057-3356; telephone (425) 917-
6457; fax (425) 917-6590. Information may be e-mailed to: [email protected].
(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.
Issued in Renton, Washington, on October 26, 2010.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2010-27745 Filed 11-2-10; 8:45 am]
BILLING CODE 4910-13-P