Airworthiness Directives; Pratt & Whitney Division Turbofan Engines, 35812-35814 [2020-12626]

Download as PDF 35812 Proposed Rules Federal Register Vol. 85, No. 114 Friday, June 12, 2020 This section of the FEDERAL REGISTER contains notices to the public of the proposed issuance of rules and regulations. The purpose of these notices is to give interested persons an opportunity to participate in the rule making prior to the adoption of the final rules. DEPARTMENT OF AGRICULTURE Office of the Secretary 7 CFR Part 9 [Docket ID: FSA–2020–0004] FOR FURTHER INFORMATION CONTACT: Notice of Funding Availability; Coronavirus Food Assistance Program (CFAP) Additional Commodities Request for Information; Correction Office of the Secretary, USDA. Notice of funding availability; request for comments; correction. AGENCY: ACTION: This document corrects the supplementary information section to the notice of funding availability and additional commodities request for information published in the Federal Register on May 22, 2020, concerning CFAP. This document adds questions to request specific information related to certain specialty crops. This is intended to add clarity. USDA is still requesting comments on additional commodities that are not already identified and on the paperwork reduction act for CFAP activities. The questions added in this correction cover additional commodities and the development of their payment rates as envisioned in the cost analysis for the CFAP rule and are not expected to impact the costs of CFAP. DATES: We will consider comments that we receive on additional commodities by June 22, 2020. We will consider comments that we receive on the Paperwork Reduction Act by July 21, 2020. ADDRESSES: We invite you to submit comments to provide information about additional commodities and comment on the information collection specified in this document. In your comment, specify [Docket ID: FSA–2020–0004], and include the volume, date, and page number of this issue of the Federal Register. You may submit comments by either of the following methods: • Federal Rulemaking Portal: Go to https://www.regulations.gov and search for Docket ID FSA–2020–0004. Follow jbell on DSKJLSW7X2PROD with PROPOSALS SUMMARY: VerDate Sep<11>2014 16:40 Jun 11, 2020 the instructions for submitting comments. • Mail: Director, SND, FSA, US Department of Agriculture, 1400 Independence Avenue SW, Stop 0522, Washington, DC 20250–0522. Comments will be available for viewing online at https:// www.regulations.gov. In addition, comments will be available for public inspection at the above address during business hours from 8 a.m. to 5 p.m., Monday through Friday, except holidays. Jkt 250001 William L. Beam, telephone (202) 720– 3175; email Bill.Beam@usda.gov. Persons with disabilities or who require alternative means for communication should contact the USDA Target Center at (202) 720–2600. SUPPLEMENTARY INFORMATION: Correction In the Federal Register of May 22, 2020, at 85 FR 31062–31065, the Secretary is making the following correction, in the SUPPLEMENTARY section. On page 31063, in the third column, add ‘‘Specialty Crops’’ before the heading ‘‘Nursery Products’’ to read as follows: Specialty Crops In addition to the questions above applicable to specialty crops, for producers of specialty crops that have been shipped from the farm by April 15, 2020, but subsequently spoiled or are unpaid due to loss of marketing channels, payments will be based on the volume of shipped, spoiled crops or that are unpaid multiplied by a pre-specified payment rate expected to represent 30 percent of the crop’s sales value. For producers with specialty crop shipments that have not left the farm or mature crops that were unharvested between January 15, 2020 and April 15, 2020, and which have not been and will not be sold, payments will be based on the volume of unharvested or unshipped crops multiplied by a prespecified payment rate expected to represent 5.875 percent of the crop’s value. If you are providing information for a specialty crop meeting the above conditions, please specify your response to the questions below: (1) The quantity and price of the crop(s) you produced that left your farm PO 00000 Frm 00001 Fmt 4702 Sfmt 4702 by April 15, 2020, and subsequently spoiled or are unpaid due to no market, and for which you did not have Federal crop insurance or Noninsured Crop Disaster Assistance Program (NAP) coverage for the loss. (2) The quantity and price of crop(s) ready for sale that did not leave the farm by April 15, 2020, and that will not be sold due to lack of markets. The questions in this correction, in addition to the questions in the initial NOFA, cover additional commodities and the development of their payment rates as envisioned in the cost analysis for the CFAP rule and are not expected to impact the costs of CFAP. Stephen L. Censky, Vice Chairman, Commodity Credit Corporation, and Deputy Secretary, U.S. Department of Agriculture. [FR Doc. 2020–12529 Filed 6–10–20; 4:15 pm] BILLING CODE P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2020–0542; Project Identifier AD–2020–00582–E] RIN 2120–AA64 Airworthiness Directives; Pratt & Whitney Division Turbofan Engines Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: The FAA proposes to adopt a new airworthiness directive (AD) for all Pratt & Whitney Division (PW) PW4164, PW4164–1D, PW4168, PW4168–1D, PW4168A, PW4168A–1D, and PW4170 model turbofan engines with a certain outer combustion chamber assembly and 3rd stage low-pressure turbine (LPT) duct segments installed. This proposed AD was prompted by reports of damaged or failed 3rd stage LPT duct segments on PW engines with the Talon IIB outer combustion chamber assembly configuration installed. This proposed AD would require removing and replacing certain 3rd stage LPT duct segments. The FAA is proposing this AD to address the unsafe condition on these products. SUMMARY: E:\FR\FM\12JNP1.SGM 12JNP1 35813 Federal Register / Vol. 85, No. 114 / Friday, June 12, 2020 / Proposed Rules The FAA must receive comments on this proposed AD by July 27, 2020. ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202–493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. DATES: Examining the AD Docket You may examine the AD docket on the internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2020– 0542; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this NPRM, any comments received, and other information. The street address for Docket Operations is listed above. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Carol Nguyen, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781– 238–7655; fax: 781–238–7199; email: carol.nguyen@faa.gov. SUPPLEMENTARY INFORMATION: Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under the ADDRESSES section. Include ‘‘Docket No. FAA–2020–0542; Project Identifier AD–2020–00582–E’’ at the beginning of your comments. The FAA specifically invites comments on the overall regulatory, economic, environmental, and energy aspects of this NPRM. The FAA will consider all comments received by the closing date and may amend this NPRM because of those comments. Except for Confidential Business Information (CBI) as described in the following paragraph, and other information as described in 14 CFR 11.35, the FAA will post all comments received, without change, to https:// www.regulations.gov, including any personal information you provide. The FAA will also post a report summarizing each substantive verbal contact received about this NPRM. Confidential Business Information Confidential Business Information (CBI) is commercial or financial information that is both customarily and actually treated as private by its owner. Under the Freedom of Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public disclosure. If your comments responsive to this AD contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this AD, it is important that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI as ‘‘PROPIN.’’ The FAA will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this AD. Submissions containing CBI should be sent to Carol Nguyen, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA, 01803. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking. Discussion The FAA received multiple reports of damaged or failed 3rd stage LPT duct segments that resulted in engine surges, in-flight shutdowns, diversions, and air turnbacks. The reports were attributed to elevated gas path temperature at the outer diameter of the turbine flowpath and high-pressure turbine 2nd stage blade outer air seal spallation, which led to the distortion and liberation of 3rd stage LPT duct segments. This condition, if not addressed, could result in uncontained release of LPT blades and vanes, damage to the engine, and damage to the airplane. Related Service Information The FAA reviewed PW Service Bulletin (SB) No. PW4G–100–72–214, dated December 15, 2011; PW SB No. PW4G–100–72–219, Revision 1, dated October 5, 2011; and PW SB No. PW4G– 100–72–253, dated November 24, 2014. PW SB No. PW4G–100–72–214 introduces the Talon IIB outer combustion chamber assembly that reduces the combustor exit temperature levels at the outer diameter of the combustor. PW SB No. PW4G–100–72– 219, Revision 1, describes procedures for installing the Advantage70 engine upgrade kit to improve engine reliability and fuel consumption, and to reduce maintenance costs. PW SB No. PW4G– 100–72–253 describes procedures for replacing the outer combustion chamber assembly waspaloy nuts. FAA’s Determination The FAA is proposing this AD because the Agency evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design. Proposed AD Requirements This proposed AD would require removing and replacing certain 3rd stage LPT duct segments. Costs of Compliance The FAA estimates that this proposed AD affects 99 engines installed on airplanes of U.S. registry. The FAA estimates the following costs to comply with this proposed AD: jbell on DSKJLSW7X2PROD with PROPOSALS ESTIMATED COSTS Action Labor cost Parts cost Cost per product Cost on U.S. operators Remove and replace 3rd stage LPT duct segments. 56 work-hours × $85 per hour = $4,760 ........ $85,000 $89,760 $8,886,240 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: VerDate Sep<11>2014 16:40 Jun 11, 2020 Jkt 250001 Aviation Programs, describes in more detail the scope of the Agency’s authority. The FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section PO 00000 Frm 00002 Fmt 4702 Sfmt 4702 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 E:\FR\FM\12JNP1.SGM 12JNP1 35814 Federal Register / Vol. 85, No. 114 / Friday, June 12, 2020 / Proposed Rules 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. Talon IIB outer combustion chamber assembly, P/N 51J500 or P/N 51J381, installed. Regulatory Findings The FAA 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) Will not affect intrastate aviation in Alaska, 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. (e) Unsafe Condition This AD was prompted by reports of damaged or failed 3rd stage LPT duct segments on PW engines with the Talon IIB outer combustion chamber assembly configuration installed. The FAA is issuing this AD to prevent failure of the 3rd stage LPT duct segments. The unsafe condition, if not addressed, could result in uncontained release of LPT blades and vanes, damage to the engine, and damage to the airplane. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, 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 airworthiness directive (AD): ■ Pratt & Whitney Division: Docket No. FAA– 2020–0542; Project Identifier AD–2020– 00582–E. (a) Comments Due Date The FAA must receive comments by July 27, 2020. jbell on DSKJLSW7X2PROD with PROPOSALS (b) Affected ADs None. (c) Applicability This AD applies to all Pratt & Whitney Division (PW) PW4164, PW4164–1D, PW4168, PW4168–1D, PW4168A, PW4168A– 1D, and PW4170 model turbofan engines that have 3rd stage low-pressure turbine (LPT) duct segments, part number (P/N) 50N434–01 or P/N 50N450–01 installed, and have the VerDate Sep<11>2014 16:40 Jun 11, 2020 Jkt 250001 (d) Subject Joint Aircraft System Component (JASC) Code 7250, Turbine Section. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Action At every engine shop visit after the effective date of this AD, remove from service the 3rd stage LPT duct segments, P/N 50N434–01 and P/N 50N450–01, and replace them with parts with zero flight cycles. (h) Terminating Action Removal of the 3rd stage LPT duct segments, P/N 50N434–01 and P/N 50N450– 01, and their replacement with parts having P/Ns other than P/N 50N434–01 and P/N 50N450–01, constitutes terminating action for the repetitive replacement required by paragraph (g) of this AD. (i) Definition For the purpose of this AD, an ‘‘engine shop visit’’ is the induction of an engine into the shop for maintenance involving the separation of pairs of major mating engine flanges (lettered flanges). The separation of engine flanges solely for the purpose of transportation without subsequent engine maintenance does not constitute an engine shop visit. (j) Alternative Methods of Compliance (AMOCs) (1) The Manager, ECO Branch, 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 certification office, send it to the attention of the person identified in paragraph (k) of this AD. You may email your request to: ANE-AD-AMOC@ faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/ certificate holding district office. (k) Related Information For more information about this AD, contact Carol Nguyen, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781–238– PO 00000 Frm 00003 Fmt 4702 Sfmt 4702 7655; fax: 781–238–7199; email: carol.nguyen@faa.gov. Issued on June 5, 2020. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2020–12626 Filed 6–11–20; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2020–0463; Product Identifier 2013–SW–041–AD] RIN 2120–AA64 Airworthiness Directives; Airbus Helicopters Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: The FAA proposes to remove Airworthiness Directive (AD) 2015–17– 01, which applies to certain Airbus Helicopters Model AS350B, AS350BA, AS350B1, AS350B2, AS350B3, AS350C, AS350D, AS350D1, AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters. AD 2015–17–01 requires certain inspections of each tail rotor pitch horn assembly (pitch horn) for a crack, replacement of a cracked pitch horn, and a repetitive visual inspection of certain pitch horns. AD 2015–17–01 is no longer necessary because the cause of the unsafe condition has been removed from all affected helicopter models. Accordingly, the FAA proposes to remove AD 2015– 17–01. DATES: The FAA must receive comments on this proposed AD by July 27, 2020. ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202–493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. You may view this service information at the FAA, Office of the Regional Counsel, Southwest Region, SUMMARY: E:\FR\FM\12JNP1.SGM 12JNP1

Agencies

[Federal Register Volume 85, Number 114 (Friday, June 12, 2020)]
[Proposed Rules]
[Pages 35812-35814]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-12626]


=======================================================================
-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2020-0542; Project Identifier AD-2020-00582-E]
RIN 2120-AA64


Airworthiness Directives; Pratt & Whitney Division Turbofan 
Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for all Pratt & Whitney Division (PW) PW4164, PW4164-1D, PW4168, 
PW4168-1D, PW4168A, PW4168A-1D, and PW4170 model turbofan engines with 
a certain outer combustion chamber assembly and 3rd stage low-pressure 
turbine (LPT) duct segments installed. This proposed AD was prompted by 
reports of damaged or failed 3rd stage LPT duct segments on PW engines 
with the Talon IIB outer combustion chamber assembly configuration 
installed. This proposed AD would require removing and replacing 
certain 3rd stage LPT duct segments. The FAA is proposing this AD to 
address the unsafe condition on these products.

[[Page 35813]]


DATES: The FAA must receive comments on this proposed AD by July 27, 
2020.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.

Examining the AD Docket

    You may examine the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2020-
0542; or in person at Docket Operations between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. The AD docket contains 
this NPRM, any comments received, and other information. The street 
address for Docket Operations is listed above. Comments will be 
available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Carol Nguyen, Aerospace Engineer, ECO 
Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781-
238-7655; fax: 781-238-7199; email: [email protected].

SUPPLEMENTARY INFORMATION: 

Comments Invited

    The FAA invites you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under the ADDRESSES section. Include ``Docket No. FAA-2020-0542; 
Project Identifier AD-2020-00582-E'' at the beginning of your comments. 
The FAA specifically invites comments on the overall regulatory, 
economic, environmental, and energy aspects of this NPRM. The FAA will 
consider all comments received by the closing date and may amend this 
NPRM because of those comments.
    Except for Confidential Business Information (CBI) as described in 
the following paragraph, and other information as described in 14 CFR 
11.35, the FAA will post all comments received, without change, to 
https://www.regulations.gov, including any personal information you 
provide. The FAA will also post a report summarizing each substantive 
verbal contact received about this NPRM.

Confidential Business Information

    Confidential Business Information (CBI) is commercial or financial 
information that is both customarily and actually treated as private by 
its owner. Under the Freedom of Information Act (FOIA) (5 U.S.C. 552), 
CBI is exempt from public disclosure. If your comments responsive to 
this AD contain commercial or financial information that is customarily 
treated as private, that you actually treat as private, and that is 
relevant or responsive to this AD, it is important that you clearly 
designate the submitted comments as CBI. Please mark each page of your 
submission containing CBI as ``PROPIN.'' The FAA will treat such marked 
submissions as confidential under the FOIA, and they will not be placed 
in the public docket of this AD. Submissions containing CBI should be 
sent to Carol Nguyen, Aerospace Engineer, ECO Branch, FAA, 1200 
District Avenue, Burlington, MA, 01803. Any commentary that the FAA 
receives which is not specifically designated as CBI will be placed in 
the public docket for this rulemaking.

Discussion

    The FAA received multiple reports of damaged or failed 3rd stage 
LPT duct segments that resulted in engine surges, in-flight shutdowns, 
diversions, and air turnbacks. The reports were attributed to elevated 
gas path temperature at the outer diameter of the turbine flowpath and 
high-pressure turbine 2nd stage blade outer air seal spallation, which 
led to the distortion and liberation of 3rd stage LPT duct segments. 
This condition, if not addressed, could result in uncontained release 
of LPT blades and vanes, damage to the engine, and damage to the 
airplane.

Related Service Information

    The FAA reviewed PW Service Bulletin (SB) No. PW4G-100-72-214, 
dated December 15, 2011; PW SB No. PW4G-100-72-219, Revision 1, dated 
October 5, 2011; and PW SB No. PW4G-100-72-253, dated November 24, 
2014. PW SB No. PW4G-100-72-214 introduces the Talon IIB outer 
combustion chamber assembly that reduces the combustor exit temperature 
levels at the outer diameter of the combustor. PW SB No. PW4G-100-72-
219, Revision 1, describes procedures for installing the Advantage70 
engine upgrade kit to improve engine reliability and fuel consumption, 
and to reduce maintenance costs. PW SB No. PW4G-100-72-253 describes 
procedures for replacing the outer combustion chamber assembly waspaloy 
nuts.

FAA's Determination

    The FAA is proposing this AD because the Agency evaluated all the 
relevant information and determined the unsafe condition described 
previously is likely to exist or develop in other products of the same 
type design.

Proposed AD Requirements

    This proposed AD would require removing and replacing certain 3rd 
stage LPT duct segments.

Costs of Compliance

    The FAA estimates that this proposed AD affects 99 engines 
installed on airplanes of U.S. registry.
    The FAA estimates the following costs to comply with this proposed 
AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
               Action                        Labor cost           Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
Remove and replace 3rd stage LPT      56 work-hours x $85 per         $85,000          $89,760       $8,886,240
 duct segments.                        hour = $4,760.
----------------------------------------------------------------------------------------------------------------

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.
    The FAA is 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

[[Page 35814]]

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

    The FAA 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) Will not affect intrastate aviation in Alaska, 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.

List of Subjects in 14 CFR Part 39

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

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 adding the following new airworthiness 
directive (AD):

Pratt & Whitney Division: Docket No. FAA-2020-0542; Project 
Identifier AD-2020-00582-E.

(a) Comments Due Date

    The FAA must receive comments by July 27, 2020.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to all Pratt & Whitney Division (PW) PW4164, 
PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, and PW4170 model 
turbofan engines that have 3rd stage low-pressure turbine (LPT) duct 
segments, part number (P/N) 50N434-01 or P/N 50N450-01 installed, 
and have the Talon IIB outer combustion chamber assembly, P/N 51J500 
or P/N 51J381, installed.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7250, Turbine 
Section.

(e) Unsafe Condition

    This AD was prompted by reports of damaged or failed 3rd stage 
LPT duct segments on PW engines with the Talon IIB outer combustion 
chamber assembly configuration installed. The FAA is issuing this AD 
to prevent failure of the 3rd stage LPT duct segments. The unsafe 
condition, if not addressed, could result in uncontained release of 
LPT blades and vanes, damage to the engine, and damage to the 
airplane.

(f) Compliance

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

(g) Required Action

    At every engine shop visit after the effective date of this AD, 
remove from service the 3rd stage LPT duct segments, P/N 50N434-01 
and P/N 50N450-01, and replace them with parts with zero flight 
cycles.

(h) Terminating Action

    Removal of the 3rd stage LPT duct segments, P/N 50N434-01 and P/
N 50N450-01, and their replacement with parts having P/Ns other than 
P/N 50N434-01 and P/N 50N450-01, constitutes terminating action for 
the repetitive replacement required by paragraph (g) of this AD.

(i) Definition

    For the purpose of this AD, an ``engine shop visit'' is the 
induction of an engine into the shop for maintenance involving the 
separation of pairs of major mating engine flanges (lettered 
flanges). The separation of engine flanges solely for the purpose of 
transportation without subsequent engine maintenance does not 
constitute an engine shop visit.

(j) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, ECO Branch, 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 
certification office, send it to the attention of the person 
identified in paragraph (k) of this AD. You may email your request 
to: [email protected].
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office.

(k) Related Information

    For more information about this AD, contact Carol Nguyen, 
Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, 
Burlington, MA 01803; phone: 781-238-7655; fax: 781-238-7199; email: 
[email protected].

    Issued on June 5, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2020-12626 Filed 6-11-20; 8:45 am]
 BILLING CODE 4910-13-P
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