Airworthiness Directives; Saab Model SAAB-Fairchild SF340A (SAAB/SF340A) and SAAB 340B Airplanes, 2192-2195 [E8-375]
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Federal Register / Vol. 73, No. 9 / Monday, January 14, 2008 / Proposed Rules
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
rmajette on PROD1PC64 with PROPOSALS
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.
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15:19 Jan 11, 2008
Jkt 214001
§ 39.13
[Amended]
2. The Federal Aviation
Administration (FAA) amends § 39.13
by adding the following new
airworthiness directive (AD):
Boeing: Docket No. FAA–2008–0012;
Directorate Identifier 2007–NM–204–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 767–
200, –300, and –400ER series airplanes,
certificated in any category; as identified in
Boeing Special Attention Service Bulletin
767–35–0054, dated July 6, 2006.
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 Related Investigative/
Corrective 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 flight
attendant and lavatory oxygen boxes, as
applicable, and do the applicable related
investigative and corrective actions, by
accomplishing all of the applicable actions
specified in the Accomplishment
Instructions of Boeing Special Attention
Service Bulletin 767–35–0054, dated July 6,
2006; except where the service bulletin
specifies installing a new oxygen mask,
replace the oxygen mask with a new or
modified oxygen mask having an improved
flow indicator. The related investigative and
corrective actions 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
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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 26, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E8–378 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–2008–0017; Directorate
Identifier 2007–NM–268–AD]
RIN 2120–AA64
Airworthiness Directives; Saab Model
SAAB-Fairchild SF340A (SAAB/
SF340A) and SAAB 340B Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
SUMMARY: We propose to adopt a new
airworthiness directive (AD) for the
products listed above. This proposed
AD results from mandatory continuing
airworthiness information (MCAI)
originated by an aviation authority of
another country to identify and correct
an unsafe condition on an aviation
product. The MCAI describes the unsafe
condition as:
Subsequent to accidents involving Fuel
Tank System explosions in flight * * * and
on [the] ground, the FAA has published
Special Federal Aviation Regulation No. 88
(SFAR–88) in June 2001 [which] required
[conducting] a design review against
explosion risks.
*
*
*
*
*
The potential of ignition sources (in
certain fuel pumps, fuel switches, refuel
shutoff valves, and optical sensors/
mechanical switches), in combination
with flammable fuel vapors, could result
in fuel tank explosions and consequent
loss of the airplane. The proposed AD
would require actions that are intended
to address the unsafe condition
described in the MCAI.
DATES: We must receive comments on
this proposed AD by February 13, 2008.
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Federal Register / Vol. 73, No. 9 / Monday, January 14, 2008 / Proposed Rules
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
W12–40, 1200 New Jersey Avenue SE.,
Washington, DC, between 9 a.m. and 5
p.m., Monday through Friday, except
Federal holidays.
ADDRESSES:
Examining the AD Docket
You may examine the AD docket on
the Internet at https://
www.regulations.gov; or in person at the
Docket Operations office 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 Operations
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:
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.
SUPPLEMENTARY INFORMATION:
rmajette on PROD1PC64 with PROPOSALS
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–2008–0017; Directorate Identifier
2007–NM–268–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 based on 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.
VerDate Aug<31>2005
15:19 Jan 11, 2008
Jkt 214001
Discussion
The European Aviation Safety Agency
(EASA), which is the Technical Agent
for the Member States of the European
Community, has issued Airworthiness
Directive 2007–0248, dated September
7, 2007 (referred to after this as ‘‘the
MCAI’’), to correct an unsafe condition
for the specified products. The MCAI
states:
Subsequent to accidents involving Fuel
Tank System explosions in flight * * * and
on [the] ground, the FAA has published
Special Federal Aviation Regulation No. 88
(SFAR–88) in June 2001 [which] required
[conducting] a design review against
explosion risks.
In their Letters referenced 04/00/02/07/01–
L296, dated March 4, 2002 and 04/00/02/07/
03–L024, dated February 3, 2003 the JAA
(Joint Aviation Authorities) recommended
the application of a similar regulation to the
National Aviation Authorities (NAA).
Under this regulation, all holders of type
certificates for passenger transport aircraft
with either a passenger capacity of 30 or
more, or a payload capacity of 7,500 pounds
(3402 kg) or more, which have received their
certification since January 1, 1958, are
required to conduct a design review against
explosion risks.
As a consequence of the design review
mentioned above, this Airworthiness
Directive (AD) requires a modification to
install extra protection of wiring installed in
fuel tank conduits.
The modification includes an
inspection for any damage of the wiring
to the fuel pumps, fuel level switches,
the refuel shut off valves, and optical
sensors/mechanical switches, and if any
damage is found, contacting SAAB for
repair and repair. These fuel pumps,
fuel switches, refuel shutoff valves, and
optical sensors/mechanical switches are
potential ignition sources. You may
obtain further information by examining
the MCAI in the AD docket.
The FAA has examined the
underlying safety issues involved in fuel
tank explosions on several large
transport airplanes, including the
adequacy of existing regulations, the
service history of airplanes subject to
those regulations, and existing
maintenance practices for fuel tank
systems. As a result of those findings,
we issued a regulation titled ‘‘Transport
Airplane Fuel Tank System Design
Review, Flammability Reduction and
Maintenance and Inspection
Requirements’’ (66 FR 23086, May 7,
2001). In addition to new airworthiness
standards for transport airplanes and
new maintenance requirements, this
rule included Special Federal Aviation
Regulation No. 88 (‘‘SFAR 88,’’
Amendment 21–78, and subsequent
Amendments 21–82 and 21–83).
Among other actions, SFAR 88
requires certain type design (i.e., type
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2193
certificate (TC) and supplemental type
certificate (STC)) holders to substantiate
that their fuel tank systems can prevent
ignition sources in the fuel tanks. This
requirement applies to type design
holders for large turbine-powered
transport airplanes and for subsequent
modifications to those airplanes. It
requires them to perform design reviews
and to develop design changes and
maintenance procedures if their designs
do not meet the new fuel tank safety
standards. As explained in the preamble
to the rule, we intended to adopt
airworthiness directives to mandate any
changes found necessary to address
unsafe conditions identified as a result
of these reviews.
In evaluating these design reviews, we
have established four criteria intended
to define the unsafe conditions
associated with fuel tank systems that
require corrective actions. The
percentage of operating time during
which fuel tanks are exposed to
flammable conditions is one of these
criteria. The other three criteria address
the failure types under evaluation:
single failures, single failures in
combination with a latent condition(s),
and in-service failure experience. For all
four criteria, the evaluations included
consideration of previous actions taken
that may mitigate the need for further
action.
The Joint Aviation Authorities (JAA)
has issued a regulation that is similar to
SFAR 88. (The JAA is an associated
body of the European Civil Aviation
Conference (ECAC) representing the
civil aviation regulatory authorities of a
number of European States who have
agreed to co-operate in developing and
implementing common safety regulatory
standards and procedures.) Under this
regulation, the JAA stated that all
members of the ECAC that hold type
certificates for transport category
airplanes are required to conduct a
design review against explosion risks.
We have determined that the actions
identified in this AD are necessary to
reduce the potential of ignition sources
inside fuel tanks, which, in combination
with flammable fuel vapors, could result
in fuel tank explosions and consequent
loss of the airplane.
Relevant Service Information
SAAB has issued Service Bulletin
340–28–026, dated July 5, 2007. The
actions described in this service
information are intended to correct the
unsafe condition identified in the
MCAI.
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Federal Register / Vol. 73, No. 9 / Monday, January 14, 2008 / Proposed Rules
FAA’s Determination and Requirements
of This Proposed AD
This product has been approved by
the aviation authority of another
country, and is approved for operation
in the United States. Pursuant to our
bilateral agreement with the State of
Design Authority, we have been notified
of the unsafe condition described in the
MCAI and service information
referenced above. We are proposing this
AD because we evaluated all pertinent
information and determined an unsafe
condition exists and is likely to exist or
develop on other products of the same
type design.
Differences Between This AD and the
MCAI or Service Information
We have reviewed the MCAI and
related service information and, in
general, agree with their substance. But
we might have found it necessary to use
different words from those in the MCAI
to ensure the AD is clear for U.S.
operators and is enforceable. In making
these changes, we do not intend to differ
substantively from the information
provided in the MCAI and related
service information.
We might also have proposed
different actions in this AD from those
in the MCAI in order to follow FAA
policies. Any such differences are
highlighted in a NOTE within the
proposed AD.
Costs of Compliance
Based on the service information, we
estimate that this proposed AD would
affect about 218 products of U.S.
registry. We also estimate that it would
take about 80 work-hours per product to
comply with the basic requirements of
this proposed AD. The average labor
rate is $80 per work-hour. Required
parts would cost about $0 per product.
Where the service information lists
required parts costs that are covered
under warranty, we have assumed that
there will be no charge for these costs.
As we do not control warranty coverage
for affected parties, some parties may
incur costs higher than estimated here.
Based on these figures, we estimate the
cost of the proposed AD on U.S.
operators to be $1,395,200, or $6,400 per
product.
rmajette on PROD1PC64 with PROPOSALS
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.
VerDate Aug<31>2005
15:19 Jan 11, 2008
Jkt 214001
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,
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.
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 FAA amends § 39.13 by adding
the following new AD:
Saab Aircraft AB: Docket No. FAA–2008–
0017; Directorate Identifier 2007–NM–
268–AD.
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Frm 00008
Fmt 4702
Sfmt 4702
Comments Due Date
(a) We must receive comments by February
13, 2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Saab Model SAABFairchild SF340A (SAAB/SF340A) and
SAAB 340B airplanes, all serial numbers,
certificated in any category.
Subject
(d) Air Transport Association (ATA) of
America Code 28: Fuel.
Reason
(e) The mandatory continuing
airworthiness information (MCAI) states:
Subsequent to accidents involving Fuel
Tank System explosions in flight *** and on
[the] ground, the FAA has published Special
Federal Aviation Regulation No. 88 (SFAR–
88) in June 2001 [which] required
[conducting] a design review against
explosion risks.
In their Letters referenced 04/00/02/07/01–
L296, dated March 4, 2002 and 04/00/02/07/
03–L024, dated February 3, 2003 the JAA
(Joint Aviation Authorities) recommended
the application of a similar regulation to the
National Aviation Authorities (NAA).
Under this regulation, all holders of type
certificates for passenger transport aircraft
with either a passenger capacity of 30 or
more, or a payload capacity of 7,500 pounds
(3402 kg) or more, which have received their
certification since January 1, 1958, are
required to conduct a design review against
explosion risks.
As a consequence of the design review
mentioned above, this Airworthiness
Directive (AD) requires a modification to
install extra protection of wiring installed in
fuel tank conduits.
The potential of ignition sources (in certain
fuel pumps, fuel switches, refuel shutoff
valves, and optical sensors/mechanical
switches), in combination with flammable
fuel vapors, could result in fuel tank
explosions and consequent loss of the
airplane. The modification includes an
inspection for any damage of the wiring to
the fuel pumps, fuel level switches, the refuel
shut off valves, and optical sensors/
mechanical switches, and if any damage is
found, contacting SAAB for repair.
Actions and Compliance
(f) Within 72 months after the effective
date of this AD, unless already done, perform
Modification No. 3164 (right-hand wing) and
Modification No. 3165 (left-hand wing) in
accordance with SAAB Service Bulletin 340–
28–026, dated July 5, 2007. The
modifications include the following actions.
(1) Removal of the fuel pumps 5QM and
6QM, the fuel switches 31EB, 32EB, 9QA,
10QA, 11QA, and 12QA, and the refuel
shutoff valves 15QA and 16QA, and the
optical sensors/mechanical switches 13QA
and 14QA.
(2) Inspection of the wiring to the fuel
pumps, fuel level switches, the refuel shutoff
valves, and optical sensors/mechanical
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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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14JAP1
]]>Agencies
[Federal Register Volume 73, Number 9 (Monday, January 14, 2008)]
[Proposed Rules]
[Pages 2192-2195]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E8-375]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2008-0017; Directorate Identifier 2007-NM-268-AD]
RIN 2120-AA64
Airworthiness Directives; Saab Model SAAB-Fairchild SF340A (SAAB/
SF340A) and SAAB 340B 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 the
products listed above. This proposed AD results from mandatory
continuing airworthiness information (MCAI) originated by an aviation
authority of another country to identify and correct an unsafe
condition on an aviation product. The MCAI describes the unsafe
condition as:
Subsequent to accidents involving Fuel Tank System explosions in
flight * * * and on [the] ground, the FAA has published Special
Federal Aviation Regulation No. 88 (SFAR-88) in June 2001 [which]
required [conducting] a design review against explosion risks.
* * * * *
The potential of ignition sources (in certain fuel pumps, fuel
switches, refuel shutoff valves, and optical sensors/mechanical
switches), in combination with flammable fuel vapors, could result in
fuel tank explosions and consequent loss of the airplane. The proposed
AD would require actions that are intended to address the unsafe
condition described in the MCAI.
DATES: We must receive comments on this proposed AD by February 13,
2008.
[[Page 2193]]
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 W12-40, 1200 New
Jersey Avenue SE., Washington, DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
Examining the AD Docket
You may examine the AD docket on the Internet at https://
www.regulations.gov; or in person at the Docket Operations office
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 Operations 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: 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.
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-2008-0017;
Directorate Identifier 2007-NM-268-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 based on 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
The European Aviation Safety Agency (EASA), which is the Technical
Agent for the Member States of the European Community, has issued
Airworthiness Directive 2007-0248, dated September 7, 2007 (referred to
after this as ``the MCAI''), to correct an unsafe condition for the
specified products. The MCAI states:
Subsequent to accidents involving Fuel Tank System explosions in
flight * * * and on [the] ground, the FAA has published Special
Federal Aviation Regulation No. 88 (SFAR-88) in June 2001 [which]
required [conducting] a design review against explosion risks.
In their Letters referenced 04/00/02/07/01-L296, dated March 4,
2002 and 04/00/02/07/03-L024, dated February 3, 2003 the JAA (Joint
Aviation Authorities) recommended the application of a similar
regulation to the National Aviation Authorities (NAA).
Under this regulation, all holders of type certificates for
passenger transport aircraft with either a passenger capacity of 30
or more, or a payload capacity of 7,500 pounds (3402 kg) or more,
which have received their certification since January 1, 1958, are
required to conduct a design review against explosion risks.
As a consequence of the design review mentioned above, this
Airworthiness Directive (AD) requires a modification to install
extra protection of wiring installed in fuel tank conduits.
The modification includes an inspection for any damage of the
wiring to the fuel pumps, fuel level switches, the refuel shut off
valves, and optical sensors/mechanical switches, and if any damage is
found, contacting SAAB for repair and repair. These fuel pumps, fuel
switches, refuel shutoff valves, and optical sensors/mechanical
switches are potential ignition sources. You may obtain further
information by examining the MCAI in the AD docket.
The FAA has examined the underlying safety issues involved in fuel
tank explosions on several large transport airplanes, including the
adequacy of existing regulations, the service history of airplanes
subject to those regulations, and existing maintenance practices for
fuel tank systems. As a result of those findings, we issued a
regulation titled ``Transport Airplane Fuel Tank System Design Review,
Flammability Reduction and Maintenance and Inspection Requirements''
(66 FR 23086, May 7, 2001). In addition to new airworthiness standards
for transport airplanes and new maintenance requirements, this rule
included Special Federal Aviation Regulation No. 88 (``SFAR 88,''
Amendment 21-78, and subsequent Amendments 21-82 and 21-83).
Among other actions, SFAR 88 requires certain type design (i.e.,
type certificate (TC) and supplemental type certificate (STC)) holders
to substantiate that their fuel tank systems can prevent ignition
sources in the fuel tanks. This requirement applies to type design
holders for large turbine-powered transport airplanes and for
subsequent modifications to those airplanes. It requires them to
perform design reviews and to develop design changes and maintenance
procedures if their designs do not meet the new fuel tank safety
standards. As explained in the preamble to the rule, we intended to
adopt airworthiness directives to mandate any changes found necessary
to address unsafe conditions identified as a result of these reviews.
In evaluating these design reviews, we have established four
criteria intended to define the unsafe conditions associated with fuel
tank systems that require corrective actions. The percentage of
operating time during which fuel tanks are exposed to flammable
conditions is one of these criteria. The other three criteria address
the failure types under evaluation: single failures, single failures in
combination with a latent condition(s), and in-service failure
experience. For all four criteria, the evaluations included
consideration of previous actions taken that may mitigate the need for
further action.
The Joint Aviation Authorities (JAA) has issued a regulation that
is similar to SFAR 88. (The JAA is an associated body of the European
Civil Aviation Conference (ECAC) representing the civil aviation
regulatory authorities of a number of European States who have agreed
to co-operate in developing and implementing common safety regulatory
standards and procedures.) Under this regulation, the JAA stated that
all members of the ECAC that hold type certificates for transport
category airplanes are required to conduct a design review against
explosion risks.
We have determined that the actions identified in this AD are
necessary to reduce the potential of ignition sources inside fuel
tanks, which, in combination with flammable fuel vapors, could result
in fuel tank explosions and consequent loss of the airplane.
Relevant Service Information
SAAB has issued Service Bulletin 340-28-026, dated July 5, 2007.
The actions described in this service information are intended to
correct the unsafe condition identified in the MCAI.
[[Page 2194]]
FAA's Determination and Requirements of This Proposed AD
This product has been approved by the aviation authority of another
country, and is approved for operation in the United States. Pursuant
to our bilateral agreement with the State of Design Authority, we have
been notified of the unsafe condition described in the MCAI and service
information referenced above. We are proposing this AD because we
evaluated all pertinent information and determined an unsafe condition
exists and is likely to exist or develop on other products of the same
type design.
Differences Between This AD and the MCAI or Service Information
We have reviewed the MCAI and related service information and, in
general, agree with their substance. But we might have found it
necessary to use different words from those in the MCAI to ensure the
AD is clear for U.S. operators and is enforceable. In making these
changes, we do not intend to differ substantively from the information
provided in the MCAI and related service information.
We might also have proposed different actions in this AD from those
in the MCAI in order to follow FAA policies. Any such differences are
highlighted in a NOTE within the proposed AD.
Costs of Compliance
Based on the service information, we estimate that this proposed AD
would affect about 218 products of U.S. registry. We also estimate that
it would take about 80 work-hours per product to comply with the basic
requirements of this proposed AD. The average labor rate is $80 per
work-hour. Required parts would cost about $0 per product. Where the
service information lists required parts costs that are covered under
warranty, we have assumed that there will be no charge for these costs.
As we do not control warranty coverage for affected parties, some
parties may incur costs higher than estimated here. Based on these
figures, we estimate the cost of the proposed AD on U.S. operators to
be $1,395,200, or $6,400 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, 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.
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 FAA amends Sec. 39.13 by adding the following new AD:
Saab Aircraft AB: Docket No. FAA-2008-0017; Directorate Identifier
2007-NM-268-AD.
Comments Due Date
(a) We must receive comments by February 13, 2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Saab Model SAAB-Fairchild SF340A (SAAB/
SF340A) and SAAB 340B airplanes, all serial numbers, certificated in
any category.
Subject
(d) Air Transport Association (ATA) of America Code 28: Fuel.
Reason
(e) The mandatory continuing airworthiness information (MCAI)
states:
Subsequent to accidents involving Fuel Tank System explosions in
flight *** and on [the] ground, the FAA has published Special
Federal Aviation Regulation No. 88 (SFAR-88) in June 2001 [which]
required [conducting] a design review against explosion risks.
In their Letters referenced 04/00/02/07/01-L296, dated March 4,
2002 and 04/00/02/07/03-L024, dated February 3, 2003 the JAA (Joint
Aviation Authorities) recommended the application of a similar
regulation to the National Aviation Authorities (NAA).
Under this regulation, all holders of type certificates for
passenger transport aircraft with either a passenger capacity of 30
or more, or a payload capacity of 7,500 pounds (3402 kg) or more,
which have received their certification since January 1, 1958, are
required to conduct a design review against explosion risks.
As a consequence of the design review mentioned above, this
Airworthiness Directive (AD) requires a modification to install
extra protection of wiring installed in fuel tank conduits.
The potential of ignition sources (in certain fuel pumps, fuel
switches, refuel shutoff valves, and optical sensors/mechanical
switches), in combination with flammable fuel vapors, could result
in fuel tank explosions and consequent loss of the airplane. The
modification includes an inspection for any damage of the wiring to
the fuel pumps, fuel level switches, the refuel shut off valves, and
optical sensors/mechanical switches, and if any damage is found,
contacting SAAB for repair.
Actions and Compliance
(f) Within 72 months after the effective date of this AD, unless
already done, perform Modification No. 3164 (right-hand wing) and
Modification No. 3165 (left-hand wing) in accordance with SAAB
Service Bulletin 340-28-026, dated July 5, 2007. The modifications
include the following actions.
(1) Removal of the fuel pumps 5QM and 6QM, the fuel switches
31EB, 32EB, 9QA, 10QA, 11QA, and 12QA, and the refuel shutoff valves
15QA and 16QA, and the optical sensors/mechanical switches 13QA and
14QA.
(2) Inspection of the wiring to the fuel pumps, fuel level
switches, the refuel shutoff valves, and optical sensors/mechanical
[[Page 2195]]
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.
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.
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
