Airworthiness Directives; Dowty Propellers Type R321/4-82-F/8, R324/4-82-F/9, R333/4-82-F/12, and R334/4-82-F/13 Propeller Assemblies, 54926-54928 [2011-22566]

Download as PDF 54926 Federal Register / Vol. 76, No. 172 / Tuesday, September 6, 2011 / Rules and Regulations for the remainder of the flight using the margins defined by § 25.629(b). V′ = Clearance speed as defined by Sec. 25.629(b)(2). V″ = Clearance speed as defined by Sec. 25.629(b)(1). Qj = (Tj)(Pj) indication systems to achieve the objective of this requirement. These certification-maintenance requirements must be limited to components that are not readily detectable by normal detection-and-indication systems and where service history shows that inspections provide an adequate level of safety. b. The existence of any failure condition, not extremely improbable, during flight that could significantly affect the structural capability of the airplane, and for which the associated reduction in airworthiness can be minimized by suitable flight limitations, must be signaled to the flightcrew. For example, failure conditions that result in an FS between the airplane strength and the loads of part 25 subpart C below 1.25, or flutter margins below V″, must be signaled to the flightcrew during flight. 5. Dispatch with known failure conditions. If the airplane is to be dispatched in a known system-failure condition that affects structural performance, or affects the reliability of the remaining system to maintain structural performance, then the provisions of this special condition must be met, including the provisions of paragraph 2 in these special conditions for the dispatched condition, and paragraph 3 for subsequent failures. Expected operational limitations may be taken into account in establishing Pj as the probability of failure occurrence for determining the safety margin in Figure 1. Flight limitations and expected operational limitations may be taken into account in establishing Qj as the combined probability of being in the dispatched failure condition, and the subsequent failure condition for the safety margins in Figures 2 and 3. These Where: Tj = Average time spent in failure condition j (in hours) Pj = Probability of occurrence of failure mode j (per hour) mstockstill on DSK4VPTVN1PROD with RULES_2 Note: If Pj is greater than 10¥3 per flight hour, then the flutter clearance speed must not be less than V″. (v) Freedom from aeroelastic instability must also be shown up to V′ in Figure 3, above, for any probable system-failure condition combined with any damage required or selected for investigation by § 25.571(b). Consideration of certain failure conditions may be required by other sections of part 25 regardless of calculated system reliability. Where analysis shows the probability of these failure conditions to be less than 10¥9, criteria other than those specified in this paragraph may be used for structural substantiation to show continued safe flight and landing. 4. Failure indications. For systemfailure detection and indication, the following apply: a. The system must be checked for failure conditions, not extremely improbable, that degrade the structural capability below the level required by part 25 or that significantly reduce the reliability of the remaining system. As far as reasonably practicable, the flightcrew must be made aware of these failures before flight. Certain elements of the control system, such as mechanical and hydraulic components, may use special periodic inspections, and electronic components may use daily checks, in lieu of detection-and- VerDate Mar<15>2010 15:01 Sep 02, 2011 Jkt 223001 PO 00000 Frm 00004 Fmt 4700 Sfmt 4700 limitations must be such that the probability of being in this combined failure state, and then subsequently encountering limit-load conditions, is extremely improbable. No reduction in these safety margins is allowed if the subsequent system-failure rate is greater than 1E¥3 per hour. Issued in Renton, Washington, on August 29, 2011. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2011–22631 Filed 9–2–11; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2010–1270; Directorate Identifier 2001–NE–50–AD; Amendment 39– 16788; AD 2005–25–10R1] RIN 2120–AA64 Airworthiness Directives; Dowty Propellers Type R321/4–82–F/8, R324/ 4–82–F/9, R333/4–82–F/12, and R334/4– 82–F/13 Propeller Assemblies Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: We are revising an existing airworthiness directive (AD) for the products listed above. That AD currently requires initial and repetitive ultrasonic inspections of propeller hubs, part number (P/N) 660709201. This new AD requires introducing a new hub assembly P/N as an optional terminating action to the repetitive hub inspections. This AD was prompted by the need to SUMMARY: E:\FR\FM\06SER1.SGM 06SER1 ER06SE11.017</GPH> determined from Figure 3. Flutter clearance speeds V′ and V″ may be based on the speed limitation specified Federal Register / Vol. 76, No. 172 / Tuesday, September 6, 2011 / Rules and Regulations introduce an optional terminating action for the repetitive inspections. We are issuing this AD to prevent propeller hub failure due to cracks in the hub, which could result in loss of control of the airplane. DATES: This AD is effective October 11, 2011. The Director of the Federal Register approved the incorporation by reference of certain publications listed in the AD as of October 11, 2011. ADDRESSES: For service information identified in this AD, contact Dowty Propellers, Anson Business Park, Cheltenham Road East, Gloucester GL 29QN, UK; phone: 44 (0) 1452 716000; fax: 44 (0) 1452 716001. You may review copies of the referenced service information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability of this material at the FAA, call 781–238–7125. mstockstill on DSK4VPTVN1PROD with RULES_2 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 AD, the regulatory evaluation, any comments received, and other information. The address for the Docket Office (phone: 800–647–5527) is Document Management Facility, U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Michael Schwetz, Aerospace Engineer, Boston Aircraft Certification Office, FAA, 12 New England Executive Park, Burlington, MA 01803; phone: 781– 238–7761; fax: 781–238–7170; e-mail: michael.schwetz@faa.gov. SUPPLEMENTARY INFORMATION: Discussion We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to revise AD 2005–25–10, Amendment 39–14403 (70 FR 73364, December 12, 2005). That AD applies to the specified products. The NPRM published in the Federal Register on April 18, 2011 (76 FR 21675). That NPRM proposed to continue to require initial and repetitive ultrasonic inspections of propeller hubs, P/N 660709201. That NPRM also proposed to introduce as an optional terminating action for the initial and repetitive ultrasonic inspections of that AD, replacement of propeller hub P/N VerDate Mar<15>2010 15:01 Sep 02, 2011 Jkt 223001 660709201 with a new propeller hub, P/ N 660717226. Comments We gave the public the opportunity to participate in developing this AD. We received no comments on the NPRM (76 FR 21675, April 18, 2011) or on the determination of the cost to the public. Conclusion We reviewed the relevant data and determined that air safety and the public interest require adopting the AD as proposed. Costs of Compliance We estimate that this AD will affect 132 propellers installed on airplanes of U.S. registry. We also estimate that it will take about 0.5 work-hour per propeller to perform the inspection and about 1 hour to replace a propeller hub. The average labor rate is $85 per workhour. Required parts will cost about $19,500 per engine. Based on these figures, we estimate the total cost of the AD to U.S. operators to be $2,590,830. 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, PO 00000 Frm 00005 Fmt 4700 Sfmt 4700 54927 (2) Is not a ‘‘significant rule’’ under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate aviation in Alaska, and (4) 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. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 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 removing airworthiness directive (AD) 2005–25–10, Amendment 39–14403 (70 FR 73364, December 12, 2005), and adding the following new AD: ■ 2005–25–10R1 Dowty Propellers (formerly Dowty Aerospace; Dowty Rotol Limited; and Dowty Rotol): Amendment 39– 16788 ; Docket No. FAA–2010–1270; Directorate Identifier 2001–NE–50–AD. Effective Date (a) This airworthiness directive (AD) is effective October 11, 2011. Affected ADs (b) This AD revises AD 2005–25–10, Amendment 39–14403 (70 FR 73364, December 12, 2005). Applicability (c) This AD applies to Dowty Propellers Type R321/4–82–F/8, R324/4–82–F/9, R333/ 4–82–F/12, and R334/4–82–F/13 propeller assemblies with propeller hubs, part number (P/N) 660709201. Unsafe Condition (d) This AD was prompted by the need to introduce an optional terminating action for the repetitive inspections. We are issuing this AD to prevent propeller hub failure due to cracks in the hub, which could result in loss of control of the airplane. Compliance (e) Comply with this AD within the compliance times specified, unless already done. Initial Ultrasonic Inspections (f) Perform an initial ultrasonic inspection of the rear wall of the rear half of the E:\FR\FM\06SER1.SGM 06SER1 54928 Federal Register / Vol. 76, No. 172 / Tuesday, September 6, 2011 / Rules and Regulations propeller hub for cracks within the compliance time specified in Table 1 of this AD. Use Appendix A or Appendix D of the applicable Dowty Alert Service Bulletin (SB) listed in Table 1 of this AD to do the inspection. TABLE 1—APPLICABLE ALERT SB FOR PROPELLER TYPE Propeller assembly type Initial inspection within . . . Repeat inspection within . . . Applicable SB (1) R334/4–82–F/13 10 flight hours (TIS) after the AD. 50 FH TIS after this AD. 50 FH TIS after this AD. 50 FH TIS after this AD. Alert SB No. 61–1119, Revision 5, dated July 1, 2009. the effective date of 300 FH time-since-last-inspection (TSLI) or 300 flight cycles-since-last inspection, whichever occurs sooner. 1,000 FH TSLI ...................................... the effective date of 1,000 FH TSLI ...................................... the effective date of 1,000 FH TSLI ...................................... (2) R321/4–82–F/8 .. (3) R324/4–82–F/9 .. (4) R333/4–82–F/12 (FH) time-in-service effective date of this (g) For hubs and propellers in storage, perform an initial ultrasonic inspection of the rear wall of the rear half of the propeller hub for cracks, before placing in service. Use Appendix A or Appendix D of the applicable Dowty Alert SB listed in Table 1 of this AD to do the inspection. Initial Inspection—Previous Credit (h) Propeller hubs, P/N 660709201, that previously passed inspection using Dowty Alert SBs listed in Table 1 of this AD or an earlier issue of those SBs, have satisfied the initial inspection requirements of this AD. However, you must comply with the repetitive inspection requirements found in this AD. Repetitive Ultrasonic Inspections (i) Thereafter, perform a repetitive ultrasonic inspection of the rear wall of the rear half of the propeller hub for cracks within the compliance time specified in Table 1 of this AD. Use Appendix A or Appendix D of the applicable Dowty Alert SB listed in Table 1 of this AD to do the inspection. Optional Terminating Action (j) As optional terminating action for the repetitive inspections required by this AD, replace propeller hub, P/N 660709201, with a new propeller hub, P/N 660717226. mstockstill on DSK4VPTVN1PROD with RULES_2 Alternative Methods of Compliance (AMOCs) (k) The Manager, Boston Certification Office, has the authority to approve AMOCs for this AD if requested using the procedures found in 14 CFR 39.19. Related Information (l) For more information about this AD, contact Michael Schwetz, Aerospace Engineer, Boston Aircraft Certification Office, FAA, 12 New England Executive Park, Burlington, MA 01803; phone: 781–238– 7761; fax: 781–238–7170; e-mail: michael.schwetz@faa.gov. (m) European Aviation Safety Agency 2010–0196R1, dated November 12, 2010, pertains to the subject of this AD. Director of the Federal Register approved the incorporation by reference (IBR) under 5 U.S.C. 552(a) and 1 CFR part 51 of the following service information on the date specified: (1) Dowty Propellers Alert SB No. 61–1119, Revision 5, dated July 1, 2009, approved for IBR as of October 11, 2011. (2) Dowty Propellers Alert SB No. 61– A1124, Revision 2, dated August 25, 2010, approved for IBR as of October 11, 2011. (3) Dowty Propellers Alert SB No. 61– A1125, Revision 2, dated August 25, 2010, approved for IBR as of October 11, 2011. (4) Dowty Propellers Alert SB No. 61– A1126, Revision 2, dated August 25, 2010, approved for IBR as of October 11, 2011. (5) For service information identified in this AD, contact Dowty Propellers, Anson Business Park, Cheltenham Road East, Gloucester GL 29QN, UK; phone: 44 (0) 1452 716000; fax: 44 (0) 1452 716001. (6) You may review copies of the service information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability of this material at the FAA, call 781–238–7125. (7) You may also review copies of the service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at an NARA facility, call 202–741– 6030, or go to https://www.archives.gov/ federal_register/code_of_federal_regulations/ ibr_locations.html. Issued in Burlington, Massachusetts, on August 15, 2011. Peter A. White, Manager, Engine & Propeller Directorate, Aircraft Certification Service. [FR Doc. 2011–22566 Filed 9–2–11; 8:45 am] BILLING CODE 4910–13–P Material Incorporated by Reference (IBR) (n) You must use the following service information to do the actions required by this AD, unless the AD specifies otherwise. The VerDate Mar<15>2010 15:01 Sep 02, 2011 Jkt 223001 PO 00000 Frm 00006 Fmt 4700 Sfmt 4700 Alert SB No. 61–A1125, Revision 2, dated August 25, 2010. Alert SB No. 61–A1126, Revision 2, dated August 25, 2010. Alert SB No. 61–A1124, Revision 2, dated August 25, 2010. DEPARTMENT OF COMMERCE Bureau of Industry and Security 15 CFR Parts 738, 740, 745, and 748 [Docket No. 110802457–1467–01] RIN 0694–AF18 Export Administration Regulations: Netherlands Antilles, Curacao, Sint ¸ Maarten and Timor-Leste Bureau of Industry and Security, Commerce. ACTION: Final rule. AGENCY: The Netherlands Antilles dissolved on October 10, 2010. This rule removes the Netherlands Antilles from all places where it is mentioned in the Export Administration Regulations (EAR), e.g., the Commerce Country Chart, the Country Groups, and License Exception APP. Curacao and Sint ¸ Maarten (the Dutch two-fifths of the island of Saint Martin) became semiautonomous entities within the Kingdom of the Netherlands. Therefore, Curacao and Sint Maarten are added to ¸ the Commerce Country Chart. The territories and dependencies of a country are treated as the parent country under the EAR. Bonaire, Saba, and Sint Eustatius now fall under the direct administration of the Netherlands. Therefore, these dependencies are treated like the Netherlands and will not be listed on the Commerce Country Chart. This rule also revises the name ‘‘East Timor’’ to read ‘‘Timor-Leste’’ throughout the EAR, because this is the proper name of the country. DATES: Effective Date: This rule is effective: September 6, 2011. FOR FURTHER INFORMATION CONTACT: For questions contact Sharron Cook, Office of Exporter Services, Bureau of Industry and Security, U.S. Department of Commerce at 202–482–2440 or by e-mail: Sharron.Cook@bis.doc.gov. SUMMARY: E:\FR\FM\06SER1.SGM 06SER1

Agencies

[Federal Register Volume 76, Number 172 (Tuesday, September 6, 2011)]
[Rules and Regulations]
[Pages 54926-54928]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-22566]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-1270; Directorate Identifier 2001-NE-50-AD; 
Amendment 39-16788; AD 2005-25-10R1]
RIN 2120-AA64


Airworthiness Directives; Dowty Propellers Type R321/4-82-F/8, 
R324/4-82-F/9, R333/4-82-F/12, and R334/4-82-F/13 Propeller Assemblies

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: We are revising an existing airworthiness directive (AD) for 
the products listed above. That AD currently requires initial and 
repetitive ultrasonic inspections of propeller hubs, part number (P/N) 
660709201. This new AD requires introducing a new hub assembly P/N as 
an optional terminating action to the repetitive hub inspections. This 
AD was prompted by the need to

[[Page 54927]]

introduce an optional terminating action for the repetitive 
inspections. We are issuing this AD to prevent propeller hub failure 
due to cracks in the hub, which could result in loss of control of the 
airplane.

DATES: This AD is effective October 11, 2011.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in the AD as of October 11, 
2011.

ADDRESSES: For service information identified in this AD, contact Dowty 
Propellers, Anson Business Park, Cheltenham Road East, Gloucester GL 
29QN, UK; phone: 44 (0) 1452 716000; fax: 44 (0) 1452 716001. You may 
review copies of the referenced service information at the FAA, Engine 
& Propeller Directorate, 12 New England Executive Park, Burlington, MA. 
For information on the availability of this material at the FAA, call 
781-238-7125.

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 AD, the regulatory evaluation, 
any comments received, and other information. The address for the 
Docket Office (phone: 800-647-5527) is Document Management Facility, 
U.S. Department of Transportation, Docket Operations, M-30, West 
Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., 
Washington, DC 20590.

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

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to revise AD 2005-25-10, Amendment 39-14403 (70 FR 73364, 
December 12, 2005). That AD applies to the specified products. The NPRM 
published in the Federal Register on April 18, 2011 (76 FR 21675). That 
NPRM proposed to continue to require initial and repetitive ultrasonic 
inspections of propeller hubs, P/N 660709201. That NPRM also proposed 
to introduce as an optional terminating action for the initial and 
repetitive ultrasonic inspections of that AD, replacement of propeller 
hub P/N 660709201 with a new propeller hub, P/N 660717226.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We received no comments on the NPRM (76 FR 21675, April 18, 
2011) or on the determination of the cost to the public.

Conclusion

    We reviewed the relevant data and determined that air safety and 
the public interest require adopting the AD as proposed.

Costs of Compliance

    We estimate that this AD will affect 132 propellers installed on 
airplanes of U.S. registry. We also estimate that it will take about 
0.5 work-hour per propeller to perform the inspection and about 1 hour 
to replace a propeller hub. The average labor rate is $85 per work-
hour. Required parts will cost about $19,500 per engine. Based on these 
figures, we estimate the total cost of the AD to U.S. operators to be 
$2,590,830.

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),
    (3) Will not affect intrastate aviation in Alaska, and
    (4) 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.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
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]

0
2. The FAA amends Sec.  39.13 by removing airworthiness directive (AD) 
2005-25-10, Amendment 39-14403 (70 FR 73364, December 12, 2005), and 
adding the following new AD:

2005-25-10R1 Dowty Propellers (formerly Dowty Aerospace; Dowty Rotol 
Limited; and Dowty Rotol): Amendment 39-16788 ; Docket No. FAA-2010-
1270; Directorate Identifier 2001-NE-50-AD.

Effective Date

    (a) This airworthiness directive (AD) is effective October 11, 
2011.

Affected ADs

    (b) This AD revises AD 2005-25-10, Amendment 39-14403 (70 FR 
73364, December 12, 2005).

Applicability

    (c) This AD applies to Dowty Propellers Type R321/4-82-F/8, 
R324/4-82-F/9, R333/4-82-F/12, and R334/4-82-F/13 propeller 
assemblies with propeller hubs, part number (P/N) 660709201.

Unsafe Condition

    (d) This AD was prompted by the need to introduce an optional 
terminating action for the repetitive inspections. We are issuing 
this AD to prevent propeller hub failure due to cracks in the hub, 
which could result in loss of control of the airplane.

Compliance

    (e) Comply with this AD within the compliance times specified, 
unless already done.

Initial Ultrasonic Inspections

    (f) Perform an initial ultrasonic inspection of the rear wall of 
the rear half of the

[[Page 54928]]

propeller hub for cracks within the compliance time specified in 
Table 1 of this AD. Use Appendix A or Appendix D of the applicable 
Dowty Alert Service Bulletin (SB) listed in Table 1 of this AD to do 
the inspection.

                                 Table 1--Applicable Alert SB for Propeller Type
----------------------------------------------------------------------------------------------------------------
                                   Initial inspection within  Repeat inspection within
     Propeller assembly type                 . . .                      . . .                 Applicable SB
----------------------------------------------------------------------------------------------------------------
(1) R334/4-82-F/13...............  10 flight hours (FH) time- 300 FH time-since-last-   Alert SB No. 61-1119,
                                    in-service (TIS) after     inspection (TSLI) or      Revision 5, dated July
                                    the effective date of      300 flight cycles-since-  1, 2009.
                                    this AD.                   last inspection,
                                                               whichever occurs sooner.
(2) R321/4-82-F/8................  50 FH TIS after the        1,000 FH TSLI...........  Alert SB No. 61-A1125,
                                    effective date of this                               Revision 2, dated
                                    AD.                                                  August 25, 2010.
(3) R324/4-82-F/9................  50 FH TIS after the        1,000 FH TSLI...........  Alert SB No. 61-A1126,
                                    effective date of this                               Revision 2, dated
                                    AD.                                                  August 25, 2010.
(4) R333/4-82-F/12...............  50 FH TIS after the        1,000 FH TSLI...........  Alert SB No. 61-A1124,
                                    effective date of this                               Revision 2, dated
                                    AD.                                                  August 25, 2010.
----------------------------------------------------------------------------------------------------------------

    (g) For hubs and propellers in storage, perform an initial 
ultrasonic inspection of the rear wall of the rear half of the 
propeller hub for cracks, before placing in service. Use Appendix A 
or Appendix D of the applicable Dowty Alert SB listed in Table 1 of 
this AD to do the inspection.

Initial Inspection--Previous Credit

    (h) Propeller hubs, P/N 660709201, that previously passed 
inspection using Dowty Alert SBs listed in Table 1 of this AD or an 
earlier issue of those SBs, have satisfied the initial inspection 
requirements of this AD. However, you must comply with the 
repetitive inspection requirements found in this AD.

Repetitive Ultrasonic Inspections

    (i) Thereafter, perform a repetitive ultrasonic inspection of 
the rear wall of the rear half of the propeller hub for cracks 
within the compliance time specified in Table 1 of this AD. Use 
Appendix A or Appendix D of the applicable Dowty Alert SB listed in 
Table 1 of this AD to do the inspection.

Optional Terminating Action

    (j) As optional terminating action for the repetitive 
inspections required by this AD, replace propeller hub, P/N 
660709201, with a new propeller hub, P/N 660717226.

Alternative Methods of Compliance (AMOCs)

    (k) The Manager, Boston Certification Office, has the authority 
to approve AMOCs for this AD if requested using the procedures found 
in 14 CFR 39.19.

Related Information

    (l) For more information about this AD, contact Michael Schwetz, 
Aerospace Engineer, Boston Aircraft Certification Office, FAA, 12 
New England Executive Park, Burlington, MA 01803; phone: 781-238-
7761; fax: 781-238-7170; e-mail: michael.schwetz@faa.gov.
    (m) European Aviation Safety Agency 2010-0196R1, dated November 
12, 2010, pertains to the subject of this AD.

Material Incorporated by Reference (IBR)

    (n) You must use the following service information to do the 
actions required by this AD, unless the AD specifies otherwise. The 
Director of the Federal Register approved the incorporation by 
reference (IBR) under 5 U.S.C. 552(a) and 1 CFR part 51 of the 
following service information on the date specified:
    (1) Dowty Propellers Alert SB No. 61-1119, Revision 5, dated 
July 1, 2009, approved for IBR as of October 11, 2011.
    (2) Dowty Propellers Alert SB No. 61-A1124, Revision 2, dated 
August 25, 2010, approved for IBR as of October 11, 2011.
    (3) Dowty Propellers Alert SB No. 61-A1125, Revision 2, dated 
August 25, 2010, approved for IBR as of October 11, 2011.
    (4) Dowty Propellers Alert SB No. 61-A1126, Revision 2, dated 
August 25, 2010, approved for IBR as of October 11, 2011.
    (5) For service information identified in this AD, contact Dowty 
Propellers, Anson Business Park, Cheltenham Road East, Gloucester GL 
29QN, UK; phone: 44 (0) 1452 716000; fax: 44 (0) 1452 716001.
    (6) You may review copies of the service information at the FAA, 
Engine & Propeller Directorate, 12 New England Executive Park, 
Burlington, MA. For information on the availability of this material 
at the FAA, call 781-238-7125.
    (7) You may also review copies of the service information that 
is incorporated by reference at the National Archives and Records 
Administration (NARA). For information on the availability of this 
material at an NARA facility, call 202-741-6030, or go to https://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

    Issued in Burlington, Massachusetts, on August 15, 2011.
Peter A. White,
Manager, Engine & Propeller Directorate, Aircraft Certification 
Service.

[FR Doc. 2011-22566 Filed 9-2-11; 8:45 am]
BILLING CODE 4910-13-P
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