Airworthiness Directives; Hamilton Sundstrand Propellers Model 247F Propellers, 62333-62335 [2010-25390]

Download as PDF Federal Register / Vol. 75, No. 195 / Friday, October 8, 2010 / Proposed Rules spar, forward auxiliary fuel tank, and aft auxiliary fuel tank, as applicable; in accordance with the Accomplishment Instructions of Boeing Service Bulletin DC9– 28–217, Revision 1, dated August 12, 2010. DEPARTMENT OF TRANSPORTATION Credit for Actions Accomplished in Accordance With Previous Service Information [Docket No. FAA–2009–0113; Directorate Identifier 2008–NE–25–AD] (h) Actions done before the effective date of this AD in accordance with Boeing Service Bulletin DC9–28–217, dated December 1, 2009, are acceptable for compliance with the requirements of paragraph (g) of this AD. Airworthiness Directives; Hamilton Sundstrand Propellers Model 247F Propellers (i)(1) The Manager, Los Angeles Aircraft Certification Office (ACO), FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the ACO, send it to the attention of the person identified in the Related Information section of this AD. (2) Before using any approved AMOC, notify your Principal Maintenance Inspector or Principal Avionics Inspector, as appropriate, or lacking a principal inspector, your local Flight Standards District Office. Related Information erowe on DSK5CLS3C1PROD with PROPOSALS-1 (j) For more information about this AD, contact Samuel Lee, Aerospace Engineer, Propulsion Branch, ANM–140L, FAA, Los Angeles ACO, 3960 Paramount Boulevard, Lakewood, California 90712–4137; phone: (562) 627–5262; fax: (562) 627–5210; e-mail: Samuel.Lee@faa.gov. (k) For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, 3855 Lakewood Boulevard, MC D800–0019, Long Beach, California 90846– 0001; telephone 206–544–5000, extension 2; fax 206–766–5683; e-mail dse.boecom@boeing.com; Internet https:// www.myboeingfleet.com. You may review copies of the referenced service information at the FAA, Transport Airplane Directorate, the FAA, 1601 Lind Avenue, SW., Renton, Washington. For information on the availability of this material at the FAA, call 425–227–1221. Issued in Renton, Washington, on October 1, 2010. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. BILLING CODE 4910–13–P VerDate Mar<15>2010 13:38 Oct 07, 2010 Jkt 223001 14 CFR Part 39 RIN 2120–AA64 Alternative Methods of Compliance (AMOCs) [FR Doc. 2010–25374 Filed 10–7–10; 8:45 am] Federal Aviation Administration Federal Aviation Administration (FAA), DOT. ACTION: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period. AGENCY: This supplemental NPRM revises an earlier proposed airworthiness directive (AD) applicable to Hamilton Sundstrand Propellers model 247F propeller assemblies with certain part number (P/N) and serial number (S/N) blades. That proposed AD would require removing affected propeller blades from service. That proposed AD resulted from reports of blades with corrosion pits in the tulip area of the blades. This supplemental NPRM revises the proposed AD to remove certain propeller S/Ns from the applicability requirement, and to add additional propeller S/Ns to the applicability requirement. This proposed AD results from the manufacture’s latest service information containing propeller S/Ns that were not specified in the proposed AD. We are proposing this AD to prevent cracks from developing in the tulip area of the blade, which could result in separation of the blade and possible loss of airplane control. DATES: We must receive any comments on this proposed AD by December 7, 2010. ADDRESSES: You can get the service information identified in this AD from Hamilton Sundstrand Propeller Technical Team, One Hamilton Road, Mail Stop 1–3–AB43, Windsor Locks, CT 06096–1010; fax (860) 654–5107. The Docket Operations office is located at Docket Management Facility, U.S. Department of Transportation, 1200 New Jersey Avenue, SE., West Building Ground Floor, Room W12–140, Washington, DC 20590–0001. FOR FURTHER INFORMATION CONTACT: Michael Schwetz, Aerospace Engineer, Boston Aircraft Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: michael.schwetz@faa.gov; telephone (781) 238–7761; fax (781) 238–7170. SUMMARY: PO 00000 Frm 00004 Fmt 4702 Sfmt 4702 62333 The FAA proposed to amend 14 CFR part 39 with a proposed AD. The proposed AD applies to Hamilton Sundstrand Propellers model 247F propeller assemblies with certain P/N and S/N blades. We published the proposed AD in the Federal Register on February 20, 2009 (74 FR 7833). That action proposed to require removing affected propeller blades from service. SUPPLEMENTARY INFORMATION: SUPPLEMENTARY INFORMATION: Comments Invited We invite you to send us any written relevant data, views, or arguments regarding this proposal. Send your comments to an address listed under ADDRESSES. Include ‘‘Docket No. FAA– 2009–0113; Directorate Identifier 2008– NE–25–AD’’ in the subject line of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of the proposed AD. We will consider all comments received by the closing date and may amend the proposed AD in light of 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 with FAA personnel concerning this proposed AD. Using the search function of the Web site, anyone can find and read the comments in any of our dockets, including, if provided, the name of the individual who sent the comment (or signed the comment on behalf of an association, business, labor union, etc.). You may review the DOT’s complete Privacy Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477–78). 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 the same as the Mail address provided in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. Discussion On February 11, 2009, we proposed to amend 14 CFR part 39 with a proposed AD. The proposed AD applies to E:\FR\FM\08OCP1.SGM 08OCP1 62334 Federal Register / Vol. 75, No. 195 / Friday, October 8, 2010 / Proposed Rules Hamilton Sundstrand Propellers model 247F propeller assemblies with blades, P/N 817370–1, S/Ns FR2018, FR2083, FR2103, FR2108, FR2109, FR2111, FR2123, FR2178, FR2183, FR2187, FR2262, FR2276 through FR2279, FR2303, and FR2389. We published the proposed AD in the Federal Register on February 20, 2009 (74 FR 7833). That action proposed to require removing affected propeller blades from service. Since we issued the proposed AD, Hamilton Sundstrand informed us that they incorrectly listed blade S/N FR2398 as S/N FR2389. They also informed us that the 247F propeller blades, P/N 817370–1, S/Ns FR2449 to FR2958 inclusive, FR20010710 to FR20010722 inclusive, and FR20010723RT to FR20020127RT inclusive, manufactured since January 1999, might also have damage to the corrosion protection on the blade tulips. Those blades also require complying with Service Bulletin (SB) 247F–61–54, Revision 1, dated January 12, 2004. Comments We provided the public the opportunity to participate in the development of this AD. We received no comments on the proposal or on the determination of the cost to the public. Changed Applicability of This Proposed AD We added blade S/Ns FR2398, FR2449 to FR2958 inclusive, FR20010710 to FR20010722 inclusive, and FR20010723RT to FR20020127RT inclusive to the applicability of the proposed AD. We removed blade S/Ns FR2083, FR2178, FR2303, and FR2389 from the applicability of the proposed AD. Hamilton Sundstrand informed us that they have reworked those blades to SB 247F–61–54, Revision 1, dated January 12, 2004. Conclusion We have carefully reviewed the available data, and determined that air safety and the public interest require reopening the comment period for the NPRM with the changes described previously. erowe on DSK5CLS3C1PROD with PROPOSALS-1 FAA’s Determination and Requirements of the Supplemental NPRM We have evaluated all pertinent information and identified an unsafe condition that is likely to exist or develop on other products of this same type design. We are proposing this AD, which would require removing certain propeller assemblies before December 31, 2010. VerDate Mar<15>2010 13:38 Oct 07, 2010 Jkt 223001 Costs of Compliance We estimate that this AD will affect 10 propellers installed on airplanes of U.S. registry. We also estimate that it will take about 16 work-hours per propeller to perform the required actions, and that the average labor rate is $85 per work-hour. Required parts will cost about $50 per propeller. Based on these figures, we estimate the total cost of this AD to U.S. operators to be $14,100. Authority for This Rulemaking Title 49 of the United States Code specifies the FAA’s authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the Agency’s authority. We are issuing this rulemaking under the authority described in subtitle VII, part A, subpart III, section 44701, ‘‘General requirements.’’ Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Regulatory Findings We have determined that this AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify that this AD: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866; (2) Is not a ‘‘significant rule’’ under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and (3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. We prepared a summary of the costs to comply with this AD and placed it in the AD Docket. You may get a copy of this summary at the address listed under ADDRESSES. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Safety. PO 00000 Frm 00005 Fmt 4702 Sfmt 4702 Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the Federal Aviation Administration 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 airworthiness directive: Hamilton Sundstrand Corporation: Docket No. FAA–2009–0113; Directorate Identifier 2008–NE–25–AD. Comments Due Date (a) The Federal Aviation Administration (FAA) must receive comments on this airworthiness directive (AD) action by December 7, 2010. Affected ADs (b) None. Applicability (c) This AD applies to Hamilton Sundstrand model 247F series propellers with blades part number (P/N) 817370–1, serial numbers (S/Ns) FR2018, FR2103, FR2108, FR2109, FR2111, FR2123, FR2183, FR2187, FR2262, FR2276 through FR2279 inclusive, FR 2398, FR2449 to FR2958 inclusive, FR20010710 to FR20010722 inclusive, and FR20010723RT to FR20020127RT inclusive, installed. These propellers are installed on, but not limited to, ATR–GIE Avions de Transport Regional ATR72–210 and ATR72–210E airplanes. Unsafe Condition (d) This AD results from reports of blades with corrosion pits in the tulip area of the blades. We are issuing this AD to prevent cracks from developing in the tulip area of the blade, which could result in separation of the blade and possible loss of airplane control. 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. Removing Blades P/N 817370–1 (f) Remove from service, blades P/N 817370–1, S/Ns FR2018, FR2103, FR2108, FR2109, FR2111, FR2123, FR2183, FR2187, FR2262, and FR2276 through FR2279, and FR2398 within 30 days after the effective date of this AD. (g) Remove from service, blades P/N 817370–1, S/Ns FR2449 to FR2958 inclusive, FR20010710 to FR20010722 inclusive, and FR20010723RT to FR20020127RT inclusive, before December 31, 2010. E:\FR\FM\08OCP1.SGM 08OCP1 Federal Register / Vol. 75, No. 195 / Friday, October 8, 2010 / Proposed Rules Alternative Methods of Compliance (h) The Manager, Boston Aircraft Certification Office, has the authority to approve alternative methods of compliance for this AD if requested using the procedures found in 14 CFR 39.19. Related Information (i) Contact Michael Schwetz, Aerospace Engineer, Boston Aircraft Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: michael.schwetz@faa.gov; telephone (781) 238–7761; fax (781) 238– 7170, for more information about this AD. (j) Hamilton Sundstrand Service Bulletin 247F–61–54, Revision 1, dated January 12, 2004, pertains to the subject of this AD. Contact Hamilton Sundstrand Propeller Technical Team, One Hamilton Road, Mail Stop 1–3–AB43, Windsor Locks, CT 06096– 1010; fax (860) 654–5107, for a copy of this service information. Issued in Burlington, Massachusetts, on October 4, 2010. Diane S. Romanosky, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 2010–25390 Filed 10–7–10; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT 24 CFR Part 203 [Docket No. FR–5156–P–01] RIN 2502 AI58 Federal Housing Administration (FHA) Single Family Lender Insurance Process: Eligibility, Indemnification, and Termination Office of the Assistant Secretary of Housing—Federal Housing Commissioner, HUD. ACTION: Proposed rule. AGENCY: Through this proposed rule, HUD continues its efforts to improve and expand the risk management activities of the Federal Housing Administration (FHA). The proposed regulatory changes will update and enhance the Lender Insurance process through which the majority of FHAinsured mortgages are endorsed for insurance. Most significantly, the proposed rule would provide additional guidance on HUD’s regulations implementing the statutory requirements regarding mortgagee indemnification to HUD of insurance claims in the case of fraud, misrepresentation, or noncompliance with applicable loan origination requirements. The proposed rule also provides that mortgagees must continually maintain the acceptable erowe on DSK5CLS3C1PROD with PROPOSALS-1 SUMMARY: VerDate Mar<15>2010 13:38 Oct 07, 2010 Jkt 223001 claim and default rate required for eligibility to initially be delegated Lender Insurance authority, in order to retain such authority. In addition, this proposed rule also provides that HUD will review Lender Insurance mortgagee performance on a continual basis. HUD also proposes to revise the methodology for determining acceptable claim and default rates, to more accurately reflect mortgagee performance, and to streamline the approval process for Lender Insurance mortgagees that have undergone a corporate restructuring. The Department has also taken the opportunity afforded by this proposed rule to make two technical corrections to the regulations and to solicit public comment on whether FHA mortgagees should be required to submit mortgage loan case binders to HUD electronically. DATES: Comment Due Date: December 7, 2010. ADDRESSES: Interested persons are invited to submit comments regarding this proposed rule to the Regulations Division, Office of General Counsel, Department of Housing and Urban Development, 451 Seventh Street, SW., Room 10276, Washington, DC 20410– 0500. Communications must refer to the above docket number and title. There are two methods for submitting public comments. All submissions must refer to the above docket number and title. 1. Submission of Comments by Mail. Comments may be submitted by mail to the Regulations Division, Office of General Counsel, Department of Housing and Urban Development, 451 Seventh Street, SW., Room 10276, Washington, DC 20410–0001. 2. Electronic Submission of Comments. Interested persons may submit comments electronically through the Federal eRulemaking Portal at http://www.regulations.gov. HUD strongly encourages commenters to submit comments electronically. Electronic submission of comments allows the commenter maximum time to prepare and submit a comment, ensures timely receipt by HUD, and enables HUD to make them immediately available to the public. Comments submitted electronically through the http://www.regulations.gov Web site can be viewed by other commenters and interested members of the public. Commenters should follow the instructions provided on that site to submit comments electronically. Note: To receive consideration as public comments, comments must be submitted through one of the two methods specified above. Again, all submissions must refer to the docket number and title of the rule. No Facsimile Comments. Facsimile (FAX) comments are not acceptable. PO 00000 Frm 00006 Fmt 4702 Sfmt 4702 62335 Public Inspection of Public Comments. All properly submitted comments and communications submitted to HUD will be available for public inspection and copying between 8 a.m. and 5 p.m. weekdays at the above address. Due to security measures at the HUD Headquarters building, an advance appointment to review the public comments must be scheduled by calling the Regulations Division at 202–708– 3055 (this is not a toll-free number). Individuals with speech or hearing impairments may access this number via TTY by calling the toll-free Federal Information Relay Service at 800–877– 8339. Copies of all comments submitted are available for inspection and downloading at http:// www.regulations.gov. FOR FURTHER INFORMATION CONTACT: Mark Ross, Acting Director, Office of Single Family Program Development, Office of Housing, Department of Housing and Urban Development, 451 Seventh Street, SW., Room 9278, Washington, DC 20410–8000; telephone number 202–708–2121 (this is not a tollfree number). Persons with hearing or speech impairments may access this number via TTY by calling the Federal Information Relay Service at 1–800– 877–8339. SUPPLEMENTARY INFORMATION: I. Background The Federal Housing Administration (FHA) was established by Congress in 1934 to improve nationwide housing standards, to provide employment and stimulate industry, to improve conditions with respect to home mortgage financing, to prevent speculative excesses in new mortgage investment, and to eliminate the necessity for costly second mortgage financing. FHA-insured single family mortgages are originated and underwritten through the Direct Endorsement process. A majority of FHA-insured mortgages that are originated under the Direct Endorsement process are endorsed for insurance by mortgage lenders through a second process, the Lender Insurance process. The Direct Endorsement and Lender Insurance processes are not separate programs; rather, they are the mechanisms that enable FHA-approved lenders to consider single family mortgage applications without first submitting paperwork to HUD. The Lender Insurance process is authorized under section 256 of the National Housing Act (12 U.S.C. 1715z–21). The HUD regulations that presently govern the Direct Endorsement and Lender E:\FR\FM\08OCP1.SGM 08OCP1

Agencies

[Federal Register Volume 75, Number 195 (Friday, October 8, 2010)]
[Proposed Rules]
[Pages 62333-62335]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2010-25390]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2009-0113; Directorate Identifier 2008-NE-25-AD]
RIN 2120-AA64


Airworthiness Directives; Hamilton Sundstrand Propellers Model 
247F Propellers

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Supplemental notice of proposed rulemaking (NPRM); reopening of 
comment period.

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

SUMMARY: This supplemental NPRM revises an earlier proposed 
airworthiness directive (AD) applicable to Hamilton Sundstrand 
Propellers model 247F propeller assemblies with certain part number (P/
N) and serial number (S/N) blades. That proposed AD would require 
removing affected propeller blades from service. That proposed AD 
resulted from reports of blades with corrosion pits in the tulip area 
of the blades. This supplemental NPRM revises the proposed AD to remove 
certain propeller S/Ns from the applicability requirement, and to add 
additional propeller S/Ns to the applicability requirement. This 
proposed AD results from the manufacture's latest service information 
containing propeller S/Ns that were not specified in the proposed AD. 
We are proposing this AD to prevent cracks from developing in the tulip 
area of the blade, which could result in separation of the blade and 
possible loss of airplane control.

DATES: We must receive any comments on this proposed AD by December 7, 
2010.

ADDRESSES: You can get the service information identified in this AD 
from Hamilton Sundstrand Propeller Technical Team, One Hamilton Road, 
Mail Stop 1-3-AB43, Windsor Locks, CT 06096-1010; fax (860) 654-5107.
    The Docket Operations office is located at Docket Management 
Facility, U.S. Department of Transportation, 1200 New Jersey Avenue, 
SE., West Building Ground Floor, Room W12-140, Washington, DC 20590-
0001.

FOR FURTHER INFORMATION CONTACT: Michael Schwetz, Aerospace Engineer, 
Boston Aircraft Certification Office, FAA, Engine and Propeller 
Directorate, 12 New England Executive Park, Burlington, MA 01803; e-
mail: michael.schwetz@faa.gov; telephone (781) 238-7761; fax (781) 238-
7170.

SUPPLEMENTARY INFORMATION: The FAA proposed to amend 14 CFR part 39 
with a proposed AD. The proposed AD applies to Hamilton Sundstrand 
Propellers model 247F propeller assemblies with certain P/N and S/N 
blades. We published the proposed AD in the Federal Register on 
February 20, 2009 (74 FR 7833). That action proposed to require 
removing affected propeller blades from service.

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite you to send us any written relevant data, views, or 
arguments regarding this proposal. Send your comments to an address 
listed under ADDRESSES. Include ``Docket No. FAA-2009-0113; Directorate 
Identifier 2008-NE-25-AD'' in the subject line of your comments. We 
specifically invite comments on the overall regulatory, economic, 
environmental, and energy aspects of the proposed AD. We will consider 
all comments received by the closing date and may amend the proposed AD 
in light of 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 
with FAA personnel concerning this proposed AD. Using the search 
function of the Web site, anyone can find and read the comments in any 
of our dockets, including, if provided, the name of the individual who 
sent the comment (or signed the comment on behalf of an association, 
business, labor union, etc.). You may review the DOT's complete Privacy 
Act Statement in the Federal Register published on April 11, 2000 (65 
FR 19477-78).

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 
the same as the Mail address provided in the ADDRESSES section. 
Comments will be available in the AD docket shortly after receipt.

Discussion

    On February 11, 2009, we proposed to amend 14 CFR part 39 with a 
proposed AD. The proposed AD applies to

[[Page 62334]]

Hamilton Sundstrand Propellers model 247F propeller assemblies with 
blades, P/N 817370-1, S/Ns FR2018, FR2083, FR2103, FR2108, FR2109, 
FR2111, FR2123, FR2178, FR2183, FR2187, FR2262, FR2276 through FR2279, 
FR2303, and FR2389. We published the proposed AD in the Federal 
Register on February 20, 2009 (74 FR 7833). That action proposed to 
require removing affected propeller blades from service.
    Since we issued the proposed AD, Hamilton Sundstrand informed us 
that they incorrectly listed blade S/N FR2398 as S/N FR2389. They also 
informed us that the 247F propeller blades, P/N 817370-1, S/Ns FR2449 
to FR2958 inclusive, FR20010710 to FR20010722 inclusive, and 
FR20010723RT to FR20020127RT inclusive, manufactured since January 
1999, might also have damage to the corrosion protection on the blade 
tulips. Those blades also require complying with Service Bulletin (SB) 
247F-61-54, Revision 1, dated January 12, 2004.

Comments

    We provided the public the opportunity to participate in the 
development of this AD. We received no comments on the proposal or on 
the determination of the cost to the public.

Changed Applicability of This Proposed AD

    We added blade S/Ns FR2398, FR2449 to FR2958 inclusive, FR20010710 
to FR20010722 inclusive, and FR20010723RT to FR20020127RT inclusive to 
the applicability of the proposed AD.
    We removed blade S/Ns FR2083, FR2178, FR2303, and FR2389 from the 
applicability of the proposed AD. Hamilton Sundstrand informed us that 
they have reworked those blades to SB 247F-61-54, Revision 1, dated 
January 12, 2004.

Conclusion

    We have carefully reviewed the available data, and determined that 
air safety and the public interest require reopening the comment period 
for the NPRM with the changes described previously.

FAA's Determination and Requirements of the Supplemental NPRM

    We have evaluated all pertinent information and identified an 
unsafe condition that is likely to exist or develop on other products 
of this same type design. We are proposing this AD, which would require 
removing certain propeller assemblies before December 31, 2010.

Costs of Compliance

    We estimate that this AD will affect 10 propellers installed on 
airplanes of U.S. registry. We also estimate that it will take about 16 
work-hours per propeller to perform the required actions, and that the 
average labor rate is $85 per work-hour. Required parts will cost about 
$50 per propeller. Based on these figures, we estimate the total cost 
of this AD to U.S. operators to be $14,100.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. Subtitle VII, Aviation Programs, 
describes in more detail the scope of the Agency's authority.
    We are issuing this rulemaking under the authority described in 
subtitle VII, part A, subpart III, section 44701, ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We have determined that this AD will not have federalism 
implications under Executive Order 13132. This AD will not have a 
substantial direct effect on the States, on the relationship between 
the national government and the States, or on the distribution of power 
and responsibilities among the various levels of government.
    For the reasons discussed above, I certify that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866;
    (2) Is not a ``significant rule'' under DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979); and
    (3) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared a summary of the costs to comply with this AD and 
placed it in the AD Docket. You may get a copy of this summary at the 
address listed under ADDRESSES.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the Federal Aviation Administration 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 
airworthiness directive:

Hamilton Sundstrand Corporation: Docket No. FAA-2009-0113; 
Directorate Identifier 2008-NE-25-AD.

Comments Due Date

    (a) The Federal Aviation Administration (FAA) must receive 
comments on this airworthiness directive (AD) action by December 7, 
2010.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Hamilton Sundstrand model 247F series 
propellers with blades part number (P/N) 817370-1, serial numbers 
(S/Ns) FR2018, FR2103, FR2108, FR2109, FR2111, FR2123, FR2183, 
FR2187, FR2262, FR2276 through FR2279 inclusive, FR 2398, FR2449 to 
FR2958 inclusive, FR20010710 to FR20010722 inclusive, and 
FR20010723RT to FR20020127RT inclusive, installed. These propellers 
are installed on, but not limited to, ATR-GIE Avions de Transport 
Regional ATR72-210 and ATR72-210E airplanes.

Unsafe Condition

    (d) This AD results from reports of blades with corrosion pits 
in the tulip area of the blades. We are issuing this AD to prevent 
cracks from developing in the tulip area of the blade, which could 
result in separation of the blade and possible loss of airplane 
control.

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.

Removing Blades P/N 817370-1

    (f) Remove from service, blades P/N 817370-1, S/Ns FR2018, 
FR2103, FR2108, FR2109, FR2111, FR2123, FR2183, FR2187, FR2262, and 
FR2276 through FR2279, and FR2398 within 30 days after the effective 
date of this AD.
    (g) Remove from service, blades P/N 817370-1, S/Ns FR2449 to 
FR2958 inclusive, FR20010710 to FR20010722 inclusive, and 
FR20010723RT to FR20020127RT inclusive, before December 31, 2010.

[[Page 62335]]

Alternative Methods of Compliance

    (h) The Manager, Boston Aircraft Certification Office, has the 
authority to approve alternative methods of compliance for this AD 
if requested using the procedures found in 14 CFR 39.19.

Related Information

    (i) Contact Michael Schwetz, Aerospace Engineer, Boston Aircraft 
Certification Office, FAA, Engine and Propeller Directorate, 12 New 
England Executive Park, Burlington, MA 01803; e-mail: 
michael.schwetz@faa.gov; telephone (781) 238-7761; fax (781) 238-
7170, for more information about this AD.
    (j) Hamilton Sundstrand Service Bulletin 247F-61-54, Revision 1, 
dated January 12, 2004, pertains to the subject of this AD. Contact 
Hamilton Sundstrand Propeller Technical Team, One Hamilton Road, 
Mail Stop 1-3-AB43, Windsor Locks, CT 06096-1010; fax (860) 654-
5107, for a copy of this service information.

    Issued in Burlington, Massachusetts, on October 4, 2010.
Diane S. Romanosky,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 2010-25390 Filed 10-7-10; 8:45 am]
BILLING CODE 4910-13-P