Airworthiness Directives; Boeing Model 757 Airplanes, 2195-2197 [E8-376]
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Federal Register / Vol. 73, No. 9 / Monday, January 14, 2008 / Proposed Rules
switches, and if any damage is found, contact
SAAB for repair instructions and repair
before further flight.
(3) Twisting of the fuel pump wiring, fuel
level switches wiring, refuel shutoff valves
wiring, and optical sensors/mechanical
switches wiring.
(4) Installation of a shrinkable tube to the
fuel pumps wiring, fuel level switches
wiring, refuel shutoff valves wiring and
optical sensors/mechanical switches wiring.
(5) Installation of fuel pumps, the fuel level
switches, the refuel shutoff valves, and the
optical sensors/mechanical switches.
(6) Operational and functional test of the
fuel measuring/indicating system.
FAA AD Differences
Note: This AD differs from the MCAI and/
or service information as follows:
(1) The MCAI does not specify corrective
action for the inspection specified in
paragraph (f)(2) of this AD. This AD requires
contacting SAAB for repair instructions and
repairing before further flight.
(2) The MCAI does not include actions for
optical sensors/mechanical switches 13QA
and 14QA; however, paragraph (f) of this AD
includes modification of those optical
sensors/mechanical switches.
rmajette on PROD1PC64 with PROPOSALS
Other FAA AD Provisions
(g) The following provisions also apply to
this AD:
(1) Alternative Methods of Compliance
(AMOCs): The Manager, International
Branch, ANM–116, 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: Shahram
Daneshmandi, Aerospace Engineer,
International Branch, ANM–116, FAA,
Transport Airplane Directorate, 1601 Lind
Avenue, SW., Renton, Washington 98057–
3356; telephone (425) 227–1112; fax (425)
227–1149. 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.
(2) Airworthy Product: For any requirement
in this AD to obtain corrective actions from
a manufacturer or other source, use these
actions if they are FAA-approved. Corrective
actions are considered FAA-approved if they
are approved by the State of Design Authority
(or their delegated agent). You are required
to assure the product is airworthy before it
is returned to service.
(3) Reporting Requirements: For any
reporting requirement in this AD, under the
provisions of the Paperwork Reduction Act,
the Office of Management and Budget (OMB)
has approved the information collection
requirements and has assigned OMB Control
Number 2120–0056.
Related Information
(h) Refer to MCAI EASA Airworthiness
Directive 2007–0248, dated September 7,
2007, and SAAB Service Bulletin 340–28–
026, dated July 5, 2007, for related
information.
VerDate Aug<31>2005
15:19 Jan 11, 2008
Jkt 214001
Issued in Renton, Washington, on January
3, 2008.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E8–375 Filed 1–11–08; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2008–0011; Directorate
Identifier 2007–NM–203–AD]
RIN 2120–AA64
Airworthiness Directives; Boeing
Model 757 Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
SUMMARY: The FAA proposes to adopt a
new airworthiness directive (AD) for
certain Boeing Model 757 airplanes.
This proposed AD would 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. This proposed AD
results from a report that several
passenger masks with broken in-line
flow indicators were found following a
mask deployment. We are proposing
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: We must receive comments on
this proposed AD by February 28, 2008.
ADDRESSES: You may send comments by
any of the following methods:
• Federal eRulemaking Portal: Go to
https://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.
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2195
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 https://
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 Letcher, 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) 917–6474; 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–2008–0011; Directorate Identifier
2007–NM–203–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 https://
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 have received a report indicating
that several passenger masks with
broken in-line flow indicators were
found following a mask deployment on
a Boeing Model 777–200 series airplane.
Operators subsequently found several
more broken in-line flow indicators after
examining the oxygen mask assemblies
on other Model 777 series airplanes and
on Model 747–400 series airplanes.
Investigation revealed that certain flow
indicators are weaker and can fracture
because of internal residual stresses
caused by the flow indicator joint
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Federal Register / Vol. 73, No. 9 / Monday, January 14, 2008 / Proposed Rules
design and manufacturing processes.
Fractures cause the in-line flow
indicator to separate and consequently
prevent oxygen flow to the mask during
an emergency. This condition, if not
corrected, could result in exposure of
the passengers and cabin attendants to
hypoxia following a depressurization
event.
The oxygen masks on certain Model
777 airplanes and Model 747–400 series
airplanes have the same flow indicators
as those installed on certain Model 757
airplanes. Therefore, the Model 757
airplanes may be subject to the
identified unsafe condition.
rmajette on PROD1PC64 with PROPOSALS
Relevant Service Information
We have reviewed Boeing Special
Attention Service Bulletin 757–35–
0028, dated April 9, 2007. The service
bulletin describes procedures for doing
a general visual inspection to determine
the manufacturer and manufacture date
of the oxygen masks in the passenger
service units (PSUs) and the lavatory
and attendant box assemblies. The
service bulletin also describes
procedures for doing the corrective
action if necessary and other specified
action. The corrective action is to repair
any B/E Aerospace oxygen mask
assembly with a manufacturing date
after January 1, 2002, and before March
1, 2006. The service bulletin also
specifies that as an alternative to doing
the repair (rework), the oxygen mask
assembly may be replaced with a new
oxygen mask.
Boeing Special Attention Service
Bulletin 757–35–0028 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 repairing the oxygen
mask assembly. B/E Aerospace Service
Bulletin 174080–35–01 describes
procedures for modifying the oxygen
mask assembly by replacing the flow
indicator, part number (P/N) 118023–02,
with an improved flow indicator, P/N
118023–12. B/E Aerospace Service
Bulletin 174080–35–01 also specifies
that, as an alternative to modifying the
oxygen mask, operators may replace the
oxygen mask with a new oxygen mask
having the improved flow indicator.
Accomplishing the actions specified
in the service information is intended to
adequately address the unsafe
condition.
FAA’s Determination and Requirements
of the Proposed AD
We have evaluated all pertinent
information and identified an unsafe
condition that is likely to exist or
develop on other airplanes of this same
VerDate Aug<31>2005
15:19 Jan 11, 2008
Jkt 214001
type design. For this reason, we are
proposing this AD, which would require
accomplishing the actions specified in
the service information described
previously.
Clarification Between the Proposed AD
and Service Bulletin
Although Boeing Special Attention
Service Bulletin 757–35–0028 specifies
to repair the oxygen mask assembly, the
intent of the service bulletin is to
replace it with either a new or modified
oxygen mask assembly having an
improved flow indicator. Therefore, this
proposed AD would require replacing
the oxygen mask assembly with a new
or modified oxygen mask assembly
having an improved flow indicator.
Costs of Compliance
There are about 1,035 airplanes of the
affected design in the worldwide fleet.
This proposed AD would affect about
640 airplanes of U.S. registry. The
proposed actions would 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 proposed 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
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
PO 00000
Frm 00010
Fmt 4702
Sfmt 4702
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 proposed 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, 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.
§ 39.13
[Amended]
2. The Federal Aviation
Administration (FAA) amends § 39.13
by adding the following new
airworthiness directive (AD):
Boeing: Docket No. FAA–2008–0011;
Directorate Identifier 2007–NM–203–AD.
Comments Due Date
(a) The FAA must receive comments on
this AD action by February 28, 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.
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Federal Register / Vol. 73, No. 9 / Monday, January 14, 2008 / Proposed Rules
Compliance
DEPARTMENT OF TRANSPORTATION
(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.
Federal Aviation Administration
14 CFR Part 39
Inspection and Corrective/Other Specified
Actions if Necessary
[Docket No. FAA–2008–0018; Directorate
Identifier 2007–NM–145–AD]
(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.
RIN 2120–AA64
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.
Issued in Renton, Washington, on
December 21, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E8–376 Filed 1–11–08; 8:45 am]
rmajette on PROD1PC64 with PROPOSALS
BILLING CODE 4910–13–P
VerDate Aug<31>2005
15:19 Jan 11, 2008
Jkt 214001
Airworthiness Directives; Airbus Model
A310 Series Airplanes and A300–600
Series Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
SUMMARY: The FAA proposes to
supersede two existing airworthiness
directives (ADs). One existing AD
applies to certain Airbus Model A310
series airplanes and requires repetitive
inspections for cracking of the flap
transmission shafts, and replacing the
transmission shafts if necessary. That
existing AD also provides an optional
terminating action for the repetitive
inspections. The other existing AD
applies to all Airbus Model A310 and
A300–600 series airplanes and requires
a one-time inspection of the trimmable
horizontal stabilizer actuator (THSA),
corrective actions if necessary, and
follow-on repetitive tasks. This
proposed AD would require revising the
Airworthiness Limitations Section of
the Instructions for Continued
Airworthiness to incorporate new
limitations and maintenance tasks for
aging systems maintenance. This
proposed AD results from the
manufacturer’s determination that life
limitations and maintenance tasks are
necessary in order to ensure continued
operational safety of the affected
airplanes. We are proposing this AD to
prevent reduced structural integrity of
these airplanes due to the failure of
system components.
DATES: We must receive comments on
this proposed AD by February 13, 2008.
ADDRESSES: You may send comments by
any of the following methods:
• Federal eRulemaking Portal: Go to
https://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
PO 00000
Frm 00011
Fmt 4702
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2197
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 AD, contact Airbus, 1 Rond Point
Maurice Bellonte, 31707 Blagnac Cedex,
France.
Examining the AD Docket
You may examine the AD docket on
the Internet at https://
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: Tom
Stafford, Aerospace Engineer,
International Branch, ANM–116,
Transport Airplane Directorate, FAA,
1601 Lind Avenue, SW., Renton,
Washington 98057–3356; telephone
(425) 227–1622; fax (425) 227–1149.
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–2008–0018; Directorate Identifier
2007–NM–145–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 https://
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
On May 8, 2006, we issued AD 2006–
10–11, amendment 39–14595 (71 FR
28254, May 16, 2006), for certain Airbus
Model A310 series airplanes. That AD
requires repetitive inspections for
cracking of the flap transmission shafts,
and replacing the transmission shafts if
necessary. That AD also provides an
optional terminating action for the
repetitive inspections. That AD resulted
from reports of longitudinal cracks due
to stress corrosion in the transmission
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]]>Agencies
[Federal Register Volume 73, Number 9 (Monday, January 14, 2008)]
[Proposed Rules]
[Pages 2195-2197]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E8-376]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2008-0011; Directorate Identifier 2007-NM-203-AD]
RIN 2120-AA64
Airworthiness Directives; Boeing Model 757 Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain Boeing Model 757 airplanes. This proposed AD would 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. This
proposed AD results from a report that several passenger masks with
broken in-line flow indicators were found following a mask deployment.
We are proposing 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: We must receive comments on this proposed AD by February 28,
2008.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Portal: Go to https://
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 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 https://
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 Letcher, 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) 917-6474; 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-2008-0011;
Directorate Identifier 2007-NM-203-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 https://
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 have received a report indicating that several passenger masks
with broken in-line flow indicators were found following a mask
deployment on a Boeing Model 777-200 series airplane. Operators
subsequently found several more broken in-line flow indicators after
examining the oxygen mask assemblies on other Model 777 series
airplanes and on Model 747-400 series airplanes. Investigation revealed
that certain flow indicators are weaker and can fracture because of
internal residual stresses caused by the flow indicator joint
[[Page 2196]]
design and manufacturing processes. Fractures cause the in-line flow
indicator to separate and consequently prevent oxygen flow to the mask
during an emergency. This condition, if not corrected, could result in
exposure of the passengers and cabin attendants to hypoxia following a
depressurization event.
The oxygen masks on certain Model 777 airplanes and Model 747-400
series airplanes have the same flow indicators as those installed on
certain Model 757 airplanes. Therefore, the Model 757 airplanes may be
subject to the identified unsafe condition.
Relevant Service Information
We have reviewed Boeing Special Attention Service Bulletin 757-35-
0028, dated April 9, 2007. The service bulletin describes procedures
for doing a general visual inspection to determine the manufacturer and
manufacture date of the oxygen masks in the passenger service units
(PSUs) and the lavatory and attendant box assemblies. The service
bulletin also describes procedures for doing the corrective action if
necessary and other specified action. The corrective action is to
repair any B/E Aerospace oxygen mask assembly with a manufacturing date
after January 1, 2002, and before March 1, 2006. The service bulletin
also specifies that as an alternative to doing the repair (rework), the
oxygen mask assembly may be replaced with a new oxygen mask.
Boeing Special Attention Service Bulletin 757-35-0028 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 repairing the oxygen mask assembly. B/E Aerospace
Service Bulletin 174080-35-01 describes procedures for modifying the
oxygen mask assembly by replacing the flow indicator, part number (P/N)
118023-02, with an improved flow indicator, P/N 118023-12. B/E
Aerospace Service Bulletin 174080-35-01 also specifies that, as an
alternative to modifying the oxygen mask, operators may replace the
oxygen mask with a new oxygen mask having the improved flow indicator.
Accomplishing the actions specified in the service information is
intended to adequately address the unsafe condition.
FAA's Determination and Requirements of the Proposed AD
We have evaluated all pertinent information and identified an
unsafe condition that is likely to exist or develop on other airplanes
of this same type design. For this reason, we are proposing this AD,
which would require accomplishing the actions specified in the service
information described previously.
Clarification Between the Proposed AD and Service Bulletin
Although Boeing Special Attention Service Bulletin 757-35-0028
specifies to repair the oxygen mask assembly, the intent of the service
bulletin is to replace it with either a new or modified oxygen mask
assembly having an improved flow indicator. Therefore, this proposed AD
would require replacing the oxygen mask assembly with a new or modified
oxygen mask assembly having an improved flow indicator.
Costs of Compliance
There are about 1,035 airplanes of the affected design in the
worldwide fleet. This proposed AD would affect about 640 airplanes of
U.S. registry. The proposed actions would 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 proposed 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
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 proposed 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, 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
adding the following new airworthiness directive (AD):
Boeing: Docket No. FAA-2008-0011; Directorate Identifier 2007-NM-
203-AD.
Comments Due Date
(a) The FAA must receive comments on this AD action by February
28, 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.
[[Page 2197]]
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.
Issued in Renton, Washington, on December 21, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E8-376 Filed 1-11-08; 8:45 am]
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