[Federal Register Volume 84, Number 58 (Tuesday, March 26, 2019)]
[Rules and Regulations]
[Pages 11214-11216]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-05582]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0735; Product Identifier 2018-NE-26-AD; Amendment 
39-19599; AD 2019-06-01]
RIN 2120-AA64


Airworthiness Directives; International Aero Engines Turbofan 
Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

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SUMMARY: We are superseding Airworthiness Directive (AD) 2018-24-01 for 
certain International Aero Engines (IAE) PW1133G-JM, PW1133GA-JM, 
PW1130G-JM, PW1127G-JM, PW1127GA-JM, PW1127G1-JM, PW1124G-JM, PW1124G1-
JM, and PW1122G-JM turbofan engines. AD 2018-24-01 required removing 
certain low-pressure turbine (LPT) 1st- and 3rd-stage disks from 
service and replacing with a part eligible for installation. This AD 
retains the same requirements as AD 2018-24-01. This AD was prompted by 
the discovery of incorrect serial numbers in the identification of LPT 
disks in AD 2018-24-01. We are issuing this AD to address the unsafe 
condition on these products.

DATES: This AD is effective April 10, 2019.
    We must receive any comments on this AD by May 10, 2019.

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 http://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590, between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays.

Examining the AD Docket

    You may examine the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2018-
0735; 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 final rule, the regulatory evaluation, any comments received, and 
other information. The street address for Docket Operations (phone: 
800-647-5527) is listed above. Comments will be available in the AD 
docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Kevin M. Clark, Aerospace Engineer, 
ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 
781-238-7088; fax: 781-238-7199; email: [email protected].

SUPPLEMENTARY INFORMATION:

Discussion

    We issued AD 2018-24-01, Amendment 39-19505 (84 FR 2715, February 
8, 2019), (``AD 2018-24-01''), for all IAE PW1133G-JM, PW1133GA-JM, 
PW1130G-JM, PW1127G-JM, PW1127GA-JM, PW1127G1-JM, PW1124G-JM, PW1124G1-
JM, and PW1122G-JM turbofan engines with certain LPT 1st- and 3rd-stage 
disks installed. AD 2018-24-01 required removing certain LPT 1st- and 
3rd-stage disks from service and replacing with a part eligible for 
installation. AD 2018-24-01 resulted from by a report of manufacturing 
defects found on delivered LPT 1st- and 3rd-stage disks. We issued AD 
2018-24-01 to prevent failure of the LPT 1st- or 3rd-stage disk.

Actions Since AD 2018-24-01 Was Issued

    Since we issued AD 2018-24-01, we learned of incorrect and omitted 
serial numbers for LPT 1st-stage and 3rd-stage disks in AD 2018-24-01. 
Two serial numbers, LLDLAJ4594 and LLDLAJ4595, were identified 
incorrectly, respectively, as LLDLAJ4494 and LLDLAJ4495 in Figure 1 to 
Paragraph (g) of AD 2018-24-01. In addition, one serial number, 
LLDLAJ6115, was included in the NPRM but inadvertently omitted from 
Figure 2 to Paragraph (g) of AD 2018-24-01. We are issuing this AD to 
address the unsafe condition on these products.

FAA's Determination

    We are issuing this AD because we 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.

AD Requirements

    This AD requires removing certain LPT 1st- and 3rd-stage disks from 
service and replacing with a part eligible for installation.

FAA's Justification and Determination of the Effective Date

    No domestic operators use this product. Therefore, we find good 
cause that notice and opportunity for prior public comment are 
impracticable. In addition, for the reason stated above, we find that 
good cause exists for making this amendment effective in less than 30 
days.

Comments Invited

    This AD is a final rule that involves requirements affecting flight 
safety, and we did not provide you with notice and an opportunity to 
provide your comments before it becomes effective. However, we invite 
you to send any written data, views, or arguments about this final 
rule. Send your comments to an address listed under the ADDRESSES 
section. Include the docket number FAA-2018-0735 and product identifier 
2018-NE-26-AD at the beginning of your comments. We specifically invite 
comments on the overall regulatory, economic, environmental, and energy 
aspects of this final rule. We will consider all comments received by 
the closing date and may amend this final rule because 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 we 
receive about this final rule.

Costs of Compliance

    We estimate that this AD affects 0 engines installed on airplanes 
of U.S. registry.
    We estimate the following costs to comply with this AD:

[[Page 11215]]



                                                 Estimated Costs
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                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
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Remove and replace LPT 1st- or 3rd-     0 work-hours x $85 per          $210,000        $210,000              $0
 stage disk.                             hour = $0.
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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.
    This AD is issued in accordance with authority delegated by the 
Executive Director, Aircraft Certification Service, as authorized by 
FAA Order 8000.51C. In accordance with that order, issuance of ADs is 
normally a function of the Compliance and Airworthiness Division, but 
during this transition period, the Executive Director has delegated the 
authority to issue ADs applicable to engines, propellers, and 
associated appliances to the Manager, Engine and Propeller Standards 
Branch, Policy and Innovation Division.

Regulatory Findings

    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 part 39 of the Federal Aviation 
Regulations (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) 
Amendment 39-19505 (84 FR 2715, February 8, 2019) and adding the 
following new AD:

2019-060-01 International Aero Engines: Amendment 39-19599; Docket 
No. FAA-2018-0735; Product Identifier 2018-NE-26-AD.

(a) Effective Date

    This AD is effective April 10, 2019.

(b) Affected ADs

    This AD replaces AD 2018-24-01, Amendment 39-19505 (84 FR 2715, 
February 8, 2019).

(c) Applicability

    This AD applies to International Aero Engines (IAE) PW1133G-JM, 
PW1133GA-JM, PW1130G-JM, PW1127G-JM, PW1127GA-JM, PW1127G1-JM, 
PW1124G-JM, PW1124G1-JM, and PW1122G-JM turbofan engines with a low-
pressure turbine (LPT) 3rd-stage disk with a serial number (S/N) 
listed in Figure 1 to paragraph (g) of this AD or an LPT 1st-stage 
disk with an S/N listed in Figure 2 to paragraph (g) of this AD, 
installed.

(d) Subject

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

(e) Unsafe Condition

    This AD was prompted by a report of manufacturing defects found 
on delivered LPT 1st- and 3rd-stage disks. We are issuing this AD to 
prevent failure of the LPT 1st- or 3rd-stage disk. The unsafe 
condition, if not addressed, could result in uncontained LPT 1st- or 
3rd-stage disk release, 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 Actions

    Remove from service the LPT 1st- and 3rd-stage disk within 30 
days after the effective date of this AD, or as identified in 
paragraphs (g)(1) or (2) of this AD, whichever occurs later, and 
replace with a part eligible for installation.
    (1) Remove the LPT 3rd-stage disk with an S/N listed in Figure 1 
to paragraph (g) of this AD at the next piece-part exposure, not to 
exceed 4,800 cycles since new (CSN).
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[[Page 11216]]

[GRAPHIC] [TIFF OMITTED] TR26MR19.000

    (2) Remove the LPT 1st-stage disk with an S/N listed in Figure 2 
to paragraph (g) of this AD at the next piece-part exposure, not to 
exceed 2,240 CSN.
[GRAPHIC] [TIFF OMITTED] TR26MR19.001

(h) 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 (i) 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.

(i) Related Information

    For more information about this AD, contact Kevin M. Clark, 
Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, 
Burlington, MA, 01803; phone: 781-238-7088; fax: 781-238-7199; 
email: [email protected].

(j) Material Incorporated by Reference

    None.

    Issued in Burlington, Massachusetts, on March 19, 2019.
Karen M. Grant,
Acting Manager, Engine and Propeller Standards Branch, Aircraft 
Certification Service.
[FR Doc. 2019-05582 Filed 3-25-19; 8:45 am]
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