Airworthiness Directives; Fokker Model F.28 Mark 0070 and 0100 Airplanes, 53709-53711 [E7-18553]

Download as PDF Federal Register / Vol. 72, No. 182 / Thursday, September 20, 2007 / Proposed Rules § 39.13 [Amended] 2. The Federal Aviation Administration (FAA) amends § 39.13 by adding the following new airworthiness directive (AD): Boeing: Docket No. FAA–2007–29255; Directorate Identifier 2007–NM–085–AD. Comments Due Date (a) The FAA must receive comments on this AD action by November 5, 2007. Affected ADs (b) AD 93–08–04, amendment 39–8551. Applicability (c) This AD applies to Boeing Model 737– 100, –200, –200C, –300, –400, and –500 series airplanes, certificated in any category; as identified in Boeing Service Bulletin 737– 53–1268, dated August 25, 2006. Unsafe Condition (d) This AD results from a report of several cracked stringer tie clips. We are issuing this AD to prevent multiple cracked stringer tie clips and damaged skin and frames, which could lead to the skin and frame structure developing cracks and consequent decompression of the airplane. 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. pwalker on PROD1PC71 with PROPOSALS Service Bulletin References (f) The term ‘‘the service bulletin,’’ as used in this AD, means the Accomplishment Instructions of Boeing Service Bulletin 737– 53–1268, dated August 25, 2006. Inspection A: Required Internal Inspections, Applicable Corrective and Related Investigative Actions, and Measurement (g) Do repetitive internal eddy current and detailed inspections to detect cracked stringer tie clips; do applicable corrective and related investigative actions, if necessary; and measure the fastener spacing and the edge margin; as applicable. Do all applicable actions at the applicable compliance times and repeat intervals identified in tables 2 through 8 inclusive of paragraph 1.E., ‘‘Compliance,’’ of the service bulletin; except as provided by paragraphs (i), (j), and (k) of this AD. Do all applicable actions in accordance with the Accomplishment Instructions of the service bulletin, except as provided by paragraph (m) of this AD. Note 1: The service bulletin refers to Boeing Service Bulletin 737–53A1177, Revision 6, dated May 31, 2001, as an additional source of service information for doing an internal eddy current inspection of the lap joint for certain airplane configurations. Inspection B: Temporary Alternative External Inspections and Corrective Actions (h) As a temporary alternative to doing the actions required by paragraph (g) of this AD, do repetitive external general visual inspections of the skin and lap joints for VerDate Aug<31>2005 17:12 Sep 19, 2007 Jkt 211001 cracks and evidence of overload resulting from cracked stringer tie clips, and applicable corrective actions if necessary. Do all applicable actions at the applicable compliance times and repeat intervals identified in tables 9 through 12 inclusive of paragraph 1.E., ‘‘Compliance,’’ of the service bulletin, but not to exceed the flight cycles in the ‘‘Inspection Period Allowed’’ column of the tables; except as provided by paragraphs (i) and (l) of this AD. Do all applicable actions in accordance with the Accomplishment Instructions of the service bulletin, except as provided by paragraph (m) of this AD. Note 2: The eddy current inspection along the stringer tie clip radius to detect damage and replacement, as applicable, specified in paragraph 3.B.5. of the Accomplishment Instructions of the service bulletin are not required by this AD. The actions are optional and can be done in addition to and at the same time as the actions required by paragraph (g) of this AD. Exceptions to Service Information (i) Where the service bulletin specifies a compliance time after the date of the service bulletin, this AD requires compliance within the specified compliance time after the effective date of this AD. (j) For Model 737–100, –200, and –200C series airplanes, on which Boeing Service Bulletin 737–53–1085, Revision 1, dated May 10, 1990, has not been done in accordance with AD 93–08–04: As of the effective date of this AD, do the applicable inspections from STA 559 to STA 887 in accordance with paragraph (g) of this AD, at the applicable compliance times specified in paragraph (b) of AD 93–08–04. (k) In the first row of tables 5 and 6 of paragraph 1.E., ‘‘Compliance,’’ of the service bulletin, where the service bulletin specifies a compliance time of before 25,000 total airplane flight cycles, this AD requires a compliance time of before the accumulation of 25,000 total flight cycles, or within 2 years after the effective date of this AD, whichever occurs later. (l) Where the service bulletin specifies no starting point (e.g., ‘‘after the date on the service bulletin’’) for a grace period, this AD requires compliance within the specified grace period after the effective date of this AD. (m) Where the service bulletin specifies to contact Boeing for appropriate action: Before further flight, repair the discrepancy using a method approved in accordance with the procedures specified in paragraph (o) of this AD. Certain Actions End Certain Requirements of AD 93–08–04 (n) Accomplishment of the internal eddy current and detailed inspections for STA 559 to STA 887 in accordance with paragraph (g) of this AD constitutes compliance with the inspections required by paragraph (a) of AD 93–08–04, as it pertains to Boeing Service Bulletin 737–53–1085, Revision 1, dated May 10, 1990. Accomplishment of the internal eddy current and detailed inspections does not terminate the remaining requirements of AD 93–08–04, as it applies to other service PO 00000 Frm 00011 Fmt 4702 Sfmt 4702 53709 bulletins. Operators are required to continue to inspect and/or modify per the other service bulletins listed in that AD. Alternative Methods of Compliance (AMOCs) (o)(1) The Manager, Seattle Aircraft Certification Office (ACO), 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. (3) An AMOC that provides an acceptable level of safety may be used for any repair required by this AD, if it is approved by an Authorized Representative for the Boeing Commercial Airplanes Delegation Option Authorization Organization who has been authorized by the Manager, Seattle ACO, to make those findings. For a repair method to be approved, the repair must meet the certification basis of the airplane, and the approval must specifically refer to this AD. Issued in Renton, Washington, on September 12, 2007. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E7–18554 Filed 9–19–07; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2007–29256; Directorate Identifier 2007–NM–137–AD] RIN 2120–AA64 Airworthiness Directives; Fokker Model F.28 Mark 0070 and 0100 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: Two events have been reported of Fokker 100 (F.28 Mk.0100) aircraft, where the Nose Landing Gear (NLG) failed to extend in the E:\FR\FM\20SEP1.SGM 20SEP1 53710 Federal Register / Vol. 72, No. 182 / Thursday, September 20, 2007 / Proposed Rules normal mode and problems were experienced to open the NLG doors, almost preventing extension of the NLG in the emergency (alternate) mode. Subsequent investigation and tests have shown that the friction of the bearing in the roller of the NLG Door Uplock Bracket Assembly is high, causing increased resistance in the mechanical system that unlocks the NLG doors. This condition, if not corrected, may result in a NLG up landing, which is considered a hazardous event. 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 October 22, 2007. ADDRESSES: You may send comments by any of the following methods: • DOT Docket Web Site: Go to http://dms.dot.gov and follow the instructions for sending your comments electronically. • 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: Room W12–140 on the ground floor of the West Building, 1200 New Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. • Federal eRulemaking Portal: http:// www.regulations.gov. Follow the instructions for submitting comments. pwalker on PROD1PC71 with PROPOSALS Examining the AD Docket You may examine the AD docket on the Internet at http://dms.dot.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–2007–29256; Directorate Identifier VerDate Aug<31>2005 17:12 Sep 19, 2007 Jkt 211001 2007–NM–137–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:// dms.dot.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 Civil Aviation Authority—The Netherlands (CAA–NL), which is the aviation authority for the Netherlands, has issued Dutch Airworthiness Directive NL–2006–004, dated February 28, 2006 (referred to after this as ‘‘the MCAI’’), to correct an unsafe condition for the specified products. The MCAI states: Two events have been reported of Fokker 100 (F.28 Mk.0100) aircraft, where the Nose Landing Gear (NLG) failed to extend in the normal mode and problems were experienced to open the NLG doors, almost preventing extension of the NLG in the emergency (alternate) mode. Subsequent investigation and tests have shown that the friction of the bearing in the roller of the NLG Door Uplock Bracket Assembly is high, causing increased resistance in the mechanical system that unlocks the NLG doors. This condition, if not corrected, may result in a NLG up landing, which is considered a hazardous event. Since a potentially unsafe condition has been identified that may exist or develop on aircraft of the same type design, this Airworthiness Directive requires the introduction of an improved roller in the NLG Door Uplock Bracket Assembly. You may obtain further information by examining the MCAI in the AD docket. Relevant Service Information Fokker Services B.V. has issued Service Bulletin SBF100–32–143, dated February 15, 2006, and Component Service Bulletin D76501–32–17, dated February 15, 2006. The actions described in this service information (replacing the roller in the uplock bracket) 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 PO 00000 Frm 00012 Fmt 4702 Sfmt 4702 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 13 products of U.S. registry. We also estimate that it would take about 5 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 $135 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 $6,955, or $535 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 E:\FR\FM\20SEP1.SGM 20SEP1 Federal Register / Vol. 72, No. 182 / Thursday, September 20, 2007 / Proposed Rules 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: Fokker Services B.V.: Docket No. FAA– 2007–29256; Directorate Identifier 2007– NM–137–AD. pwalker on PROD1PC71 with PROPOSALS Comments Due Date (a) We must receive comments by October 22, 2007. Affected ADs (b) None. Applicability (c) This AD applies to Fokker Model F.28 Mark 0070 and 0100 airplanes, certificated in any category, all serial numbers. VerDate Aug<31>2005 17:12 Sep 19, 2007 Jkt 211001 Subject (d) Air Transport Association (ATA) of America Code 32: Landing gear. Reason (e) The mandatory continuing airworthiness information (MCAI) states: Two events have been reported of Fokker 100 (F.28 Mk.0100) aircraft, where the Nose Landing Gear (NLG) failed to extend in the normal mode and problems were experienced to open the NLG doors, almost preventing extension of the NLG in the emergency (alternate) mode. Subsequent investigation and tests have shown that the friction of the bearing in the roller of the NLG Door Uplock Bracket Assembly is high, causing increased resistance in the mechanical system that unlocks the NLG doors. This condition, if not corrected, may result in a NLG up landing, which is considered a hazardous event. Since a potentially unsafe condition has been identified that may exist or develop on aircraft of the same type design, this Airworthiness Directive requires the introduction of an improved roller in the NLG Door Uplock Bracket Assembly. Actions and Compliance (f) Unless already done, do the following actions. (1) Within 4,000 flight hours after the effective date of this AD, modify the NLG Door Uplock Bracket Assembly, in accordance with the Accomplishment Instructions of Fokker Service Bulletin SBF100–32–143, dated February 15, 2006. (2) As of 18 months after the effective date of this AD, no spare NLG Door Uplock Bracket Assembly may be installed as a replacement part unless it has been modified in accordance with the Accomplishment Instructions of Fokker Component Service Bulletin D76501–32–17, dated February 15, 2006. Note: This AD differs from the MCAI and/ or service information as follows: No difference. 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: Tom Rodriguez, Aerospace Engineer, 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 PO 00000 Frm 00013 Fmt 4702 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 Dutch Airworthiness Directive NL–2006–004, dated February 28, 2006, Fokker Service Bulletin SBF100–32– 143, dated February 15, 2006, and Fokker Component Service Bulletin D76501–32–17, dated February 15, 2006, for related information. Issued in Renton, Washington, on September 12, 2007. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E7–18553 Filed 9–19–07; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration 21 CFR Part 2 [Docket No. 2007N–0262] RIN 0910–AF92 Use of Ozone-Depleting Substances; Removal of Essential-Use Designation (Epinephrine) AGENCY: Sfmt 4702 Food and Drug Administration, HHS. ACTION: FAA AD Differences 53711 Proposed rule. SUMMARY: The Food and Drug Administration (FDA), after consultation with the Environmental Protection Agency (EPA), is proposing to amend FDA’s regulation on the use of ozone-depleting substances (ODSs) in self-pressurized containers to remove the essential-use designation for epinephrine used in oral pressurized metered-dose inhalers (MDIs). FDA has tentatively concluded that there are no substantial technical barriers to formulating epinephrine as a product that does not release ODSs, and therefore epinephrine would no longer be an essential use of ODSs. If the essential-use designation is removed, epinephrine MDIs containing an ODS could not be marketed after a suitable transition period. We will hold an open public meeting on the essential use of epinephrine on a date to be announced later. DATES: Submit written or electronic comments by November 19, 2007. E:\FR\FM\20SEP1.SGM 20SEP1

Agencies

[Federal Register Volume 72, Number 182 (Thursday, September 20, 2007)]
[Proposed Rules]
[Pages 53709-53711]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E7-18553]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-29256; Directorate Identifier 2007-NM-137-AD]
RIN 2120-AA64


Airworthiness Directives; Fokker Model F.28 Mark 0070 and 0100 
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

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:

    Two events have been reported of Fokker 100 (F.28 Mk.0100) 
aircraft, where the Nose Landing Gear (NLG) failed to extend in the

[[Page 53710]]

normal mode and problems were experienced to open the NLG doors, 
almost preventing extension of the NLG in the emergency (alternate) 
mode. Subsequent investigation and tests have shown that the 
friction of the bearing in the roller of the NLG Door Uplock Bracket 
Assembly is high, causing increased resistance in the mechanical 
system that unlocks the NLG doors. This condition, if not corrected, 
may result in a NLG up landing, which is considered a hazardous 
event.

    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 October 22, 
2007.

ADDRESSES: You may send comments by any of the following methods:
     DOT Docket Web Site: Go to http://dms.dot.gov and follow 
the instructions for sending your comments electronically.
     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: Room W12-140 on the ground floor of the 
West Building, 1200 New Jersey Avenue, SE., Washington, DC, between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
     Federal eRulemaking Portal: http://www.regulations.gov. 
Follow the instructions for submitting comments.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://
dms.dot.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-2007-
29256; Directorate Identifier 2007-NM-137-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://
dms.dot.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 Civil Aviation Authority--The Netherlands (CAA-NL), which is 
the aviation authority for the Netherlands, has issued Dutch 
Airworthiness Directive NL-2006-004, dated February 28, 2006 (referred 
to after this as ``the MCAI''), to correct an unsafe condition for the 
specified products. The MCAI states:

    Two events have been reported of Fokker 100 (F.28 Mk.0100) 
aircraft, where the Nose Landing Gear (NLG) failed to extend in the 
normal mode and problems were experienced to open the NLG doors, 
almost preventing extension of the NLG in the emergency (alternate) 
mode. Subsequent investigation and tests have shown that the 
friction of the bearing in the roller of the NLG Door Uplock Bracket 
Assembly is high, causing increased resistance in the mechanical 
system that unlocks the NLG doors. This condition, if not corrected, 
may result in a NLG up landing, which is considered a hazardous 
event. Since a potentially unsafe condition has been identified that 
may exist or develop on aircraft of the same type design, this 
Airworthiness Directive requires the introduction of an improved 
roller in the NLG Door Uplock Bracket Assembly.

You may obtain further information by examining the MCAI in the AD 
docket.

Relevant Service Information

    Fokker Services B.V. has issued Service Bulletin SBF100-32-143, 
dated February 15, 2006, and Component Service Bulletin D76501-32-17, 
dated February 15, 2006. The actions described in this service 
information (replacing the roller in the uplock bracket) 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 13 products of U.S. registry. We also estimate that 
it would take about 5 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 $135 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 $6,955, or $535 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

[[Page 53711]]

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-2007-29256; Directorate 
Identifier 2007-NM-137-AD.

Comments Due Date

    (a) We must receive comments by October 22, 2007.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Fokker Model F.28 Mark 0070 and 0100 
airplanes, certificated in any category, all serial numbers.

Subject

    (d) Air Transport Association (ATA) of America Code 32: Landing 
gear.

Reason

    (e) The mandatory continuing airworthiness information (MCAI) 
states:

    Two events have been reported of Fokker 100 (F.28 Mk.0100) 
aircraft, where the Nose Landing Gear (NLG) failed to extend in the 
normal mode and problems were experienced to open the NLG doors, 
almost preventing extension of the NLG in the emergency (alternate) 
mode. Subsequent investigation and tests have shown that the 
friction of the bearing in the roller of the NLG Door Uplock Bracket 
Assembly is high, causing increased resistance in the mechanical 
system that unlocks the NLG doors. This condition, if not corrected, 
may result in a NLG up landing, which is considered a hazardous 
event. Since a potentially unsafe condition has been identified that 
may exist or develop on aircraft of the same type design, this 
Airworthiness Directive requires the introduction of an improved 
roller in the NLG Door Uplock Bracket Assembly.

Actions and Compliance

    (f) Unless already done, do the following actions.
    (1) Within 4,000 flight hours after the effective date of this 
AD, modify the NLG Door Uplock Bracket Assembly, in accordance with 
the Accomplishment Instructions of Fokker Service Bulletin SBF100-
32-143, dated February 15, 2006.
    (2) As of 18 months after the effective date of this AD, no 
spare NLG Door Uplock Bracket Assembly may be installed as a 
replacement part unless it has been modified in accordance with the 
Accomplishment Instructions of Fokker Component Service Bulletin 
D76501-32-17, dated February 15, 2006.

FAA AD Differences

    Note: This AD differs from the MCAI and/or service information 
as follows: No difference.

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: Tom Rodriguez, Aerospace Engineer, 
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 MCAI Dutch Airworthiness Directive NL-2006-004, 
dated February 28, 2006, Fokker Service Bulletin SBF100-32-143, 
dated February 15, 2006, and Fokker Component Service Bulletin 
D76501-32-17, dated February 15, 2006, for related information.

    Issued in Renton, Washington, on September 12, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E7-18553 Filed 9-19-07; 8:45 am]
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