Document ID: FAA-2008-0011-0004
Agency: faa
Document Type: Rule
Title: Airworthiness Directives; Boeing Model 757 Airplanes
Posted Date: 2008-04-14T04:00Z

[Federal Register: April 14, 2008 (Volume 73, Number 72)]
[Rules and Regulations]               
[Page 19982-19983]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr14ap08-11]                         

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2008-0011; Directorate Identifier 2007-NM-203-AD; 
Amendment 39-15460; AD 2008-08-08]
RIN 2120-AA64

 
Airworthiness Directives; Boeing Model 757 Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: We are adopting a new airworthiness directive (AD) for certain 
Boeing Model 757 airplanes. This AD requires an inspection to determine 
the manufacturer and manufacture date of the oxygen masks in the 
passenger service units and the lavatory and attendant box assemblies, 
and corrective action if necessary. This AD results from a report that 
several passenger masks with broken in-line flow indicators were found 
following a mask deployment. We are issuing this AD to prevent the in-
line flow indicators of the passenger oxygen masks from fracturing and 
separating, which could inhibit oxygen flow to the masks and 
consequently result in exposure of the passengers and cabin attendants 
to hypoxia following a depressurization event.

DATES: This AD is effective May 19, 2008.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of May 19, 
2008.

ADDRESSES: For service information identified in this AD, contact 
Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-
2207.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://
www.regulations.gov; or in person at the Docket Management Facility 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains this AD, the regulatory evaluation, 
any comments received, and other information. The address for the 
Docket Office (telephone 800-647-5527) is the Document Management 
Facility, U.S. Department of Transportation, Docket Operations, M-30, 
West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., 
Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Robert Hettman, Aerospace Engineer, 
Cabin Safety and Environmental Systems Branch, ANM-150S, FAA, Seattle 
Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, 
Washington 98057-3356; telephone (425) 917-6457; fax (425) 917-6590.

SUPPLEMENTARY INFORMATION: 

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to include an airworthiness directive (AD) that would apply to 
certain Boeing Model 757 airplanes. That NPRM was published in the 
Federal Register on January 14, 2008 (73 FR 2195). That NPRM proposed 
to require an inspection to determine the manufacturer and manufacture 
date of the oxygen masks in the passenger service units and the 
lavatory and attendant box assemblies, and corrective action if 
necessary.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We considered the comment received. Boeing supports the NPRM.

Conclusion

    We reviewed the relevant data, considered the comments received, 
and determined that air safety and the public interest require adopting 
the AD as proposed.

Costs of Compliance

    There are about 1,035 airplanes of the affected design in the 
worldwide fleet. This AD affects about 640 airplanes of U.S. registry. 
The required actions take about 20 work hours per airplane, for an 
average of 240 oxygen masks per airplane, at an average labor rate of 
$80 per work hour. Based on these figures, the estimated cost of the AD 
for U.S. operators is $1,024,000, or $1,600 per airplane.

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

    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.
    You can find our regulatory evaluation and the estimated costs of 
compliance in the AD Docket.

[[Page 19983]]

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 FAA amends Sec.  39.13 by adding the following new AD:

2008-08-08 Boeing: Amendment 39-15460. Docket No. FAA-2008-0011; 
Directorate Identifier 2007-NM-203-AD.

Effective Date

    (a) This airworthiness directive (AD) is effective May 19, 2008.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Boeing Model 757-200, -200CB, -200PF, and 
-300 series airplanes, certificated in any category; as identified 
in Boeing Special Attention Service Bulletin 757-35-0028, dated 
April 9, 2007.

Unsafe Condition

    (d) This AD results from a report that several passenger masks 
with broken in-line flow indicators were found following a mask 
deployment. We are issuing this AD to prevent the in-line flow 
indicators of the passenger oxygen masks from fracturing and 
separating, which could inhibit oxygen flow to the masks and 
consequently result in exposure of the passengers and cabin 
attendants to hypoxia following a depressurization event.

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.

Inspection and Corrective/Other Specified Actions if Necessary

    (f) Within 60 months after the effective date of this AD, do a 
general visual inspection to determine the manufacturer and 
manufacture date of the oxygen masks in the passenger service units 
and the lavatory and attendant box assemblies, and do the applicable 
corrective action, by accomplishing all of the applicable actions 
specified in the Accomplishment Instructions of Boeing Special 
Attention Service Bulletin 757-35-0028, dated April 9, 2007; except 
where the service bulletin specifies repairing the oxygen mask 
assembly, replace it with a new or modified oxygen mask assembly 
having an improved flow indicator. The corrective action and other 
specified action must be done before further flight.

    Note 1: The service bulletin refers to B/E Aerospace Service 
Bulletin 174080-35-01, dated February 6, 2006; and Revision 1, dated 
May 1, 2006; as additional sources of service information for 
modifying the oxygen mask assembly by replacing the flow indicator 
with an improved flow indicator.

Alternative Methods of Compliance (AMOCs)

    (g)(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) 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 appropriate principal inspector (PI) in the FAA 
Flight Standards District Office (FSDO), or lacking a PI, your local 
FSDO.

Material Incorporated by Reference

    (h) You must use Boeing Special Attention Service Bulletin 757-
35-0028, dated April 9, 2007, to do the actions required by this AD, 
unless the AD specifies otherwise.
    (1) The Director of the Federal Register approved the 
incorporation by reference of this service information under 5 
U.S.C. 552(a) and 1 CFR part 51.
    (2) For service information identified in this AD, contact 
Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 
98124-2207.
    (3) You may review copies of the service information 
incorporated by reference at the FAA, Transport Airplane 
Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the 
National Archives and Records Administration (NARA). For information 
on the availability of this material at NARA, call 202-741-6030, or 
go to: http://www.archives.gov/federal_register/code_of_federal_
regulations/ibr_locations.html.

    Issued in Renton, Washington, on March 31, 2008.
Dionne Palermo,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E8-7297 Filed 4-11-08; 8:45 am]

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