[Federal Register: February 5, 2008 (Volume 73, Number 24)]
[Proposed Rules]
[Page 6629-6631]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr05fe08-23]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2008-0117; Directorate Identifier 2007-NM-273-AD]
RIN 2120-AA64
Airworthiness Directives; Fokker Model F.28 Mark 0070 and Mark
0100 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:
[L]eakage of hot wing anti-icing air from the Peri-seal housing.
This results in an uncontrolled flow of high-pressure hot air to
enter the forward (anti-icing) plenum chamber of the wing leading
edge, potentially damaging the anti-icing barrier webs.
Subsequently, the wing auxiliary spar can also be damaged by high-
pressure hot air. * * * [D]eterioration of the Peri-seals enables
the piccolo tubes to vibrate, resulting in a broken piccolo tube.
This condition, if not corrected, may cause heat damage to the front
spar that potentially affects the wing's load capability.
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 March 6, 2008.
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 W12-40, 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 http://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: Tom Rodriguez, Aerospace Engineer,
International Branch, ANM-116, FAA, Transport Airplane Directorate,
1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425)
227-1137; 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-2008-0117;
Directorate Identifier 2007-NM-273-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 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
The European Aviation Safety Agency (EASA), which is the Technical
Agent for the Member States of the European Community, has issued EASA
Airworthiness Directive 2007-0229, dated August 15, 2007 (referred to
after this as ``the MCAI''), to correct an unsafe condition for the
specified products. The MCAI states:
In 1997, Fokker introduced a new type of Peri-seal (SBF 100-30-
022). The old type was known to be subject to deterioration, which,
in combination with improper installation, can cause leakage of hot
wing anti-icing air from the Peri-seal housing. This results in an
uncontrolled flow of high-pressure hot air to enter the forward
(anti-icing) plenum chamber of the wing leading edge, potentially
damaging the anti-icing barrier webs. Subsequently, the wing
auxiliary spar can also be damaged by high-pressure hot air.
Analysis at the time showed that any resulting damage (known to
occur at inboard positions only) would not affect the wing load
capability. For this reason, the modification was not classified as
MANDATORY and no AD action was warranted. However, through a recent
occurrence, it was discovered that deterioration of the Peri-seals
enables the piccolo tubes to vibrate, resulting in a broken piccolo
tube. In this case, the location of the failure was more outboard
than previous occurrences. This condition, if not corrected, may
cause heat damage to the front spar that potentially affects the
wing's load capability. Since an unsafe condition was identified,
likely to exist or develop on an aircraft of this type design, CAA
(Civil Aviation Authority) Netherlands issued AD NL-2006-011 to
require inspection of the Piccolo Tubes and the surrounding
structure to establish correct installation, as well as the
replacement of the 460-series Peri-seals by the improved 600-series,
which have a higher temperature limit.
Since the issuance of that AD, Fokker has developed a
modification, published as
[[Page 6630]]
Component Service Bulletin (CSB) D14000-57-007, for spare wing
leading edge sections that may still contain the 460-series Peri-
seals. For that reason, this EASA AD retains the requirements of AD
NL-2006-011 and adds a limit for the allowed use of unmodified wing
leading edge section as replacement part.
The corrective actions include inspection of the piccolo tubes and the
wing leading edge for damage and replacement of the Peri-seals or
repair of damage, as applicable. You may obtain further information by
examining the MCAI in the AD docket.
Relevant Service Information
Fokker has issued Service Bulletin SBF100-30-028, Revision 1, dated
April 17, 2007, and Component Service Bulletin D14000-57-007, dated
April 17, 2007. The actions described in this service information are
intended to correct the unsafe condition identified in the MCAI.
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 9 products of U.S. registry. We also estimate that
it would take about 48 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 $3,430 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 $65,430, or $7,270 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:
Fokker Services B.V.: Docket No. FAA-2008-0117; Directorate
Identifier 2007-NM-273-AD.
Comments Due Date
(a) We must receive comments by March 6, 2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Fokker Model F.28 Mark 0070 and Mark 0100
airplanes, certificated in any category, all serial numbers, except
those previously modified in accordance with Fokker Service Bulletin
SBF 100-30-022.
Subject
(d) Air Transport Association (ATA) of America Code 30: Ice and
Rain Protection.
Reason
(e) The mandatory continuing airworthiness information (MCAI)
states:
In 1997, Fokker introduced a new type of Peri-seal (SBF 100-30-
022). The old type was known to be subject to deterioration, which,
in combination with improper installation, can cause leakage of hot
wing anti-icing air from the Peri-seal housing. This results in an
uncontrolled flow of high-pressure hot air to enter the forward
(anti-icing) plenum chamber of the wing leading edge, potentially
damaging the anti-icing barrier webs. Subsequently, the wing
auxiliary spar can also be damaged by high-pressure hot air.
Analysis at the time showed that any resulting damage (known to
occur at inboard positions only) would not affect the wing load
capability. For this reason, the modification was not classified as
MANDATORY and no AD action was warranted. However, through a recent
occurrence, it was discovered that deterioration of the Peri-seals
enables the piccolo tubes to vibrate, resulting in a broken piccolo
tube. In this case, the location of the failure was more outboard
than previous occurrences. This condition, if not corrected, may
cause heat damage to the front spar that potentially affects the
wing's load capability. Since an unsafe condition was identified,
likely to exist or develop on an aircraft of this
[[Page 6631]]
type design, CAA (Civil Aviation Authority) Netherlands issued AD
NL-2006-011 to require inspection of the Piccolo Tubes and the
surrounding structure to establish correct installation, as well as
the replacement of the 460-series Peri-seals by the improved 600-
series, which have a higher temperature limit.
Since the issuance of that AD, Fokker has developed a
modification, published as Component Service Bulletin (CSB) D14000-
57-007, for spare wing leading edge sections that may still contain
the 460-series Peri-seals. For that reason, this EASA AD retains the
requirements of AD NL-2006-011 and adds a limit for the allowed use
of unmodified wing leading edge section as replacement part.
The corrective actions include inspection of the piccolo tubes and
the wing leading edge for damage and replacement of the Peri-seals
or repair of damage, as applicable.
Actions and Compliance
(f) Unless already done, do the following actions.
(1) Within 4,000 flight hours or 12 months after the effective
date of this AD, whichever occurs first, do the actions in
paragraphs (f)(1)(i) and (f)(1)(ii) of this AD in accordance with
the Accomplishment Instructions of Fokker Service Bulletin SBF100-
30-028, Revision 1, dated April 17, 2007.
(i) Inspect for damage of the piccolo tubes and the wing leading
edge on the outside and on the inside at the access panels. If any
damage is found that is beyond the limits specified in the service
bulletin, repair before further flight.
(ii) Replace the 460-series Peri-seals in the riblets with
improved 600-series Peri-seals.
(2) As of 12 months after the effective date of this AD, no
person may install on any airplane a spare wing leading edge section
unless the leading edge section has been modified in accordance with
Fokker Component Service Bulletin D14000-57-007, dated April 17,
2007.
(3) Actions done before the effective date of this AD in
accordance with Fokker Service Bulletin SBF100-30-028, dated May 18,
2006, are considered acceptable for compliance with the actions
required by paragraph (f)(1) of this AD.
FAA AD Differences
Note: This AD differs from the MCAI and/or service information
as follows: No differences.
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, Transport Airplane Directorate, 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: Tom
Rodriguez, Aerospace Engineer, International Branch, ANM-116,
Transport Airplane Directorate, FAA, 1601 Lind Avenue, SW., Renton,
Washington 98057-3356; telephone (425) 227-1137; 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 European Aviation Safety Agency (EASA)
Airworthiness Directive 2007-0229, dated August 15, 2007, Fokker
Service Bulletin SBF100-30-028, Revision 1, dated April 17, 2007,
and Fokker Component Service Bulletin D14000-57-007, dated April 17,
2007, for related information.
Issued in Renton, Washington, on January 24, 2008.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E8-1991 Filed 2-4-08; 8:45 am]
BILLING CODE 4910-13-P