Airworthiness Directives; Rolls-Royce Corporation (Type Certificate Previously Held by Allison Engine Company) Turboprop Engines, 73658-73660 [2021-28136]

Download as PDF 73658 Federal Register / Vol. 86, No. 246 / Tuesday, December 28, 2021 / Rules and Regulations such earlier date as determined by FHFA, and continuing through December 31 of the third full calendar year following the FEMA designation. This time period may be adjusted for a particular disaster area by notice from FHFA to the Enterprises. * * * * * ■ 3. Amend § 1282.12 as follows: ■ a. Revise paragraphs (c)(2), (d)(2), (e)(2), and (f); ■ b. Redesignate paragraph (g) as paragraph (h); ■ c. Add new paragraph (g); and ■ d. Revise newly redesignated paragraph (h)(2). The revisions and additions read as follows: § 1282.12 Single-family housing goals. khammond on DSKJM1Z7X2PROD with RULES * * * * * (c) * * * (2) The benchmark level, which for 2022, 2023, and 2024 shall be 28 percent of the total number of purchase money mortgages purchased by that Enterprise in each year that finance owner-occupied single-family properties. (d) * * * (2) The benchmark level, which for 2022, 2023, and 2024 shall be 7 percent of the total number of purchase money mortgages purchased by that Enterprise in each year that finance owneroccupied single-family properties. (e) * * * (2) A benchmark level which shall be set annually by FHFA notice based on the sum of the benchmark levels for the low-income census tracts housing subgoal and the minority census tracts housing subgoal, plus an adjustment factor reflecting the additional incremental share of mortgages for moderate-income families in designated disaster areas in the most recent year for which such data is available. (f) Low-income census tracts housing subgoal. The percentage share of each Enterprise’s total purchases of purchase money mortgages on owner-occupied single-family housing that— (1) Consists of: (i) Mortgages in low-income census tracts that are not minority census tracts; and (ii) Mortgages for families with incomes in excess of 100 percent of the area median income in low-income census tracts that are also minority census tracts; (2) Shall meet or exceed either: (i) The share of such mortgages in the market as defined in paragraph (b) of this section in each year; or (ii) The benchmark level, which for 2022, 2023, and 2024 shall be 4 percent VerDate Sep<11>2014 20:57 Dec 27, 2021 Jkt 256001 of the total number of purchase money mortgages purchased by that Enterprise in each year that finance owneroccupied single-family properties. (g) Minority census tracts housing subgoal. The percentage share of each Enterprise’s total purchases of purchase money mortgages on owner-occupied single-family housing that consists of mortgages for moderate-income families in minority census tracts shall meet or exceed either: (1) The share of such mortgages in the market as defined in paragraph (b) of this section in each year; or (2) The benchmark level, which for 2022, 2023, and 2024 shall be 10 percent of the total number of purchase money mortgages purchased by that Enterprise in each year that finance owner-occupied single-family properties. (h) * * * (2) The benchmark level, which for 2022, 2023, and 2024 shall be 26 percent of the total number of refinancing mortgages purchased by that Enterprise in each year that finance owner-occupied single-family properties. ■ 4. Amend § 1282.13 by revising paragraphs (b) through (d) to read as follows: § 1282.13 Multifamily special affordable housing goal and subgoals. * * * * * (b) Multifamily low-income housing goal. For the year 2022, the benchmark level for each Enterprise’s purchases of mortgages on multifamily residential housing affordable to low-income families shall be at least 415,000 dwelling units affordable to low-income families in multifamily residential housing financed by mortgages purchased by the Enterprise in 2022. (c) Multifamily very low-income housing subgoal. For the year 2022, the benchmark level for each Enterprise’s purchases of mortgages on multifamily residential housing affordable to very low-income families shall be at least 88,000 dwelling units affordable to very low-income families in multifamily residential housing financed by mortgages purchased by the Enterprise in 2022. (d) Small multifamily low-income housing subgoal. For the year 2022, the benchmark level for each Enterprise’s purchases of mortgages on small multifamily properties affordable to low-income families shall be, for Freddie Mac, at least 23,000 dwelling units affordable to low-income families in small multifamily properties financed by mortgages purchased by that PO 00000 Frm 00044 Fmt 4700 Sfmt 4700 Enterprise in 2022, and for Fannie Mae, at least 17,000 such dwelling units. § 1282.15 [Amended] 5. Amend § 1282.15 by removing paragraph (i). ■ § 1282.16 [Amended] 6. Amend § 1282.16 by removing and reserving paragraph (c)(10). ■ Sandra L. Thompson, Acting Director, Federal Housing Finance Agency. [FR Doc. 2021–28168 Filed 12–27–21; 8:45 am] BILLING CODE 8070–01–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2021–0874; Project Identifier AD–2021–00668–E; Amendment 39–21892; AD 2022–01–04] RIN 2120–AA64 Airworthiness Directives; Rolls-Royce Corporation (Type Certificate Previously Held by Allison Engine Company) Turboprop Engines Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for certain Rolls-Royce Corporation (RRC) AE 2100D3 model turboprop engines. This AD was prompted by an in-flight shutdown (IFSD) of an engine and subsequent investigation by the manufacturer that revealed a crack in the 3rd-stage compressor wheel. This AD requires replacement of the affected 3rd-stage compressor wheel. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective February 2, 2022. ADDRESSES: For service information identified in this final rule, contact Rolls-Royce Corporation, Rolls-Royce Meridian Center, 450 South Meridian Street, Indianapolis, IN 46225–1103; phone: (317) 230–1200; email: defenseservicedesk@Rolls-Royce.com. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (817) 222–5110. It is also available at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–0874. SUMMARY: E:\FR\FM\28DER1.SGM 28DER1 73659 Federal Register / Vol. 86, No. 246 / Tuesday, December 28, 2021 / Rules and Regulations Examining the AD Docket You may examine the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–0874; 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, any comments received, and other information. The address for Docket Operations is 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: Kyri Zaroyiannis, Aviation Safety Engineer, Chicago ACO, FAA, 2300 E. Devon Avenue, Des Plaines, IL 60018; phone: (847) 294–7836; fax: (847) 294–7834; email: kyri.zaroyiannis@faa.gov. SUPPLEMENTARY INFORMATION: Background The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to certain RRC AE 2100D3 model turboprop engines. The NPRM published in the Federal Register on October 12, 2021 (86 FR 56660). The NPRM was prompted by an uncommanded IFSD of a RRC AE 3007A1 model turbofan engine installed on an Embraer S.A. model EMB–145 airplane (marketed as ERJ–145), while conducting a revenue flight. The manufacturer’s investigation of this incident revealed that the IFSD resulted from a low-cycle fatigue crack in the dovetail slot for the blade attachment in the 3rd-stage compressor wheel, causing one 3rd-stage compressor blade to release. The crack initiated in the dovetail slot due to a sharp corner in the wheel slot geometry. The broaching process was identified as the cause of the crack and parts from this manufacturing lot required removal from service. In response to this event and the manufacturer’s subsequent investigation, the FAA issued a final rule; request for comments, AD 2020– 16–13 (85 FR 45769, July 30, 2020), requiring replacement of certain 3rdstage compressor wheels installed on RRC AE 3007A, AE 3007A1, AE 3007A1/1, AE 3007A1/2, AE 3007A1/3, AE 3007A1E, AE 3007A1P, and AE 3007A3 model turbofan engines before the 3rd-stage compressor wheels accumulate a specified number of cycles. The actions required by AD 2020–16–13 address engines that experienced high stresses at the 3rdstage compressor wheel location and accumulated cycles at a high rate. In the NPRM, the FAA proposed to require replacement of certain AE 2100D3 3rdstage compressor wheels that were produced in the same lot as the AE 3007 3rd-stage compressor wheels identified in AD 2020–16–13, before they accumulate a specified number of cycles. The FAA is issuing this AD to address the unsafe condition on these products. Discussion of Final Airworthiness Directive Comments The FAA received comments from one anonymous commenter. The anonymous commenter supported the NPRM without change. Conclusion The FAA reviewed the relevant data, considered the comment received, and determined that air safety requires adopting the AD as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on these products. Except for a minor editorial change to the contact address for service information, this AD is adopted as proposed in the NPRM. Related Service Information The FAA reviewed Rolls-Royce Alert Service Bulletin (ASB) AE 2100D3–A– 72–330, Engine—3rd Stage Compressor Wheel Removal for Reduced Life Limit, dated June 11, 2021. The ASB describes procedures for removal of a certain 3rdstage compressor wheel. Costs of Compliance The FAA estimates that this AD affects 15 engines installed on airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD: ESTIMATED COSTS Action Labor cost Remove and replace 3rd-stage compressor wheel. 125 work-hours × $85 per hour = $10,625 .... khammond on DSKJM1Z7X2PROD with RULES 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 necessary for safety in air commerce. This regulation is within the scope of VerDate Sep<11>2014 20:57 Dec 27, 2021 Jkt 256001 Parts cost that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. 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) Will not affect intrastate aviation in Alaska, and PO 00000 Frm 00045 Fmt 4700 Sfmt 4700 Cost per product $32,844 $43,469 Cost on U.S. operators $652,035 (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 Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: E:\FR\FM\28DER1.SGM 28DER1 73660 Federal Register / Vol. 86, No. 246 / Tuesday, December 28, 2021 / Rules and Regulations 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: ■ 2022–01–04 Rolls-Royce Corporation (Type Certificate previously held by Allison Engine Company): Amendment 39– 21892; Docket No. FAA–2021–0874; Project Identifier AD–2021–00668–E. (a) Effective Date This airworthiness directive (AD) is effective February 2, 2022. (c) Applicability This AD applies to Rolls-Royce Corporation (RRC) AE 2100D3 model turboprop engines with a 3rd-stage compressor wheel, part number (P/N) 23084158, and with a serial number listed in Figure 1 to paragraph (c) of this AD. Figure 1 to Paragraph (c)—Serial Numbers of Affected P/N 23084158 3rd-stage Compressor Wheels L343502 L343539 L343545 L343546 L343547 L343550 L343553 L343554 L343555 L343566 L343569 L343573 L343576 L343578 L343579 L343580 L343584 L343588 L343593 L343594 L343597 L343602 khammond on DSKJM1Z7X2PROD with RULES (e) Unsafe Condition This AD was prompted by an in-flight shutdown of an engine during a revenue flight and subsequent investigation by the manufacturer that revealed a crack in the 3rdstage compressor wheel. The FAA is issuing this AD to prevent failure of the 3rd-stage compressor wheel. The unsafe condition, if not addressed, could result in an uncontained release of the 3rd-stage compressor wheel, damage to the engine, and damage to the airplane. Jkt 256001 Federal Aviation Administration (g) Required Actions Before the affected 3rd-stage compressor wheel exceeds 5,200 flight cycles since new, remove the affected 3rd-stage compressor wheel and replace with a part eligible for installation. (h) Definition For the purpose of this AD, a part eligible for installation is a 3rd-stage compressor wheel that does not have a P/N and a serial number listed in the Applicability, paragraph (c) of this AD. A special flight permit may be issued in accordance with 14 CFR 21.197 and 21.199 to permit a one-time, non-revenue ferry flight to a location where the engine can be removed from service. This ferry flight must be performed with only essential flight crew. (j) Alternative Methods of Compliance (AMOCs) (1) The Manager, Chicago 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 certification office, send it to the attention of the person identified in paragraph (k) of this AD. (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 Kyri Zaroyiannis, Aviation Safety Engineer, Chicago ACO, FAA, 2300 E. Devon Avenue, Des Plaines, IL 60018; phone: (847) 294–7836; fax: (847) 294–7834; email: kyri.zaroyiannis@faa.gov. (l) Material Incorporated by Reference None. (d) Subject Joint Aircraft System Component (JASC) Code 7230, Turbine Engine Compressor Section. 20:57 Dec 27, 2021 DEPARTMENT OF TRANSPORTATION Comply with this AD within the compliance times specified, unless already done. (i) Special Flight Permit (b) Affected ADs None. VerDate Sep<11>2014 (f) Compliance Issued on December 21, 2021. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021–28136 Filed 12–27–21; 8:45 am] 14 CFR Part 39 [Docket No. FAA–2021–0134; Project Identifier AD–2020–01254–T; Amendment 39–21833; AD 2021–24–12] RIN 2120–AA64 Airworthiness Directives; The Boeing Company Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777 airplanes. This AD was prompted by significant changes, including new or more restrictive requirements, made to the airworthiness limitations (AWLs) and Critical Design Configuration Control Limitations (CDCCLs) related to fuel tank ignition prevention, the engine fuel suction feed system, and the nitrogen generation system. This AD requires revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective February 1, 2022. The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of February 1, 2022. ADDRESSES: For service information identified in this final rule, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services (C&DS), 2600 Westminster Blvd., MC 110–SK57, Seal Beach, CA 90740–5600; telephone 562–797–1717; internet https://www.myboeingfleet.com. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. It is also available at https:// www.regulations.gov by searching for and locating Docket No. FAA–2021– 0134. SUMMARY: BILLING CODE 4910–13–P PO 00000 Examining the AD Docket You may examine the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–0134; 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 Frm 00046 Fmt 4700 Sfmt 4700 E:\FR\FM\28DER1.SGM 28DER1

Agencies

[Federal Register Volume 86, Number 246 (Tuesday, December 28, 2021)]
[Rules and Regulations]
[Pages 73658-73660]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-28136]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0874; Project Identifier AD-2021-00668-E; 
Amendment 39-21892; AD 2022-01-04]
RIN 2120-AA64


Airworthiness Directives; Rolls-Royce Corporation (Type 
Certificate Previously Held by Allison Engine Company) Turboprop 
Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain Rolls-Royce Corporation (RRC) AE 2100D3 model turboprop 
engines. This AD was prompted by an in-flight shutdown (IFSD) of an 
engine and subsequent investigation by the manufacturer that revealed a 
crack in the 3rd-stage compressor wheel. This AD requires replacement 
of the affected 3rd-stage compressor wheel. The FAA is issuing this AD 
to address the unsafe condition on these products.

DATES: This AD is effective February 2, 2022.

ADDRESSES: For service information identified in this final rule, 
contact Rolls-Royce Corporation, Rolls-Royce Meridian Center, 450 South 
Meridian Street, Indianapolis, IN 46225-1103; phone: (317) 230-1200; 
email: Royce.com">[email protected]Royce.com. You may view this service 
information at the FAA, Airworthiness Products Section, Operational 
Safety Branch, 1200 District Avenue, Burlington, MA 01803. For 
information on the availability of this material at the FAA, call (817) 
222-5110. It is also available at https://www.regulations.gov by 
searching for and locating Docket No. FAA-2021-0874.

[[Page 73659]]

Examining the AD Docket

    You may examine the AD docket at https://www.regulations.gov by 
searching for and locating Docket No. FAA-2021-0874; 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, any 
comments received, and other information. The address for Docket 
Operations is 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: Kyri Zaroyiannis, Aviation Safety 
Engineer, Chicago ACO, FAA, 2300 E. Devon Avenue, Des Plaines, IL 
60018; phone: (847) 294-7836; fax: (847) 294-7834; email: 
[email protected].

SUPPLEMENTARY INFORMATION:

Background

    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 by adding an AD that would apply to certain RRC AE 2100D3 
model turboprop engines. The NPRM published in the Federal Register on 
October 12, 2021 (86 FR 56660). The NPRM was prompted by an uncommanded 
IFSD of a RRC AE 3007A1 model turbofan engine installed on an Embraer 
S.A. model EMB-145 airplane (marketed as ERJ-145), while conducting a 
revenue flight. The manufacturer's investigation of this incident 
revealed that the IFSD resulted from a low-cycle fatigue crack in the 
dovetail slot for the blade attachment in the 3rd-stage compressor 
wheel, causing one 3rd-stage compressor blade to release. The crack 
initiated in the dovetail slot due to a sharp corner in the wheel slot 
geometry. The broaching process was identified as the cause of the 
crack and parts from this manufacturing lot required removal from 
service.
    In response to this event and the manufacturer's subsequent 
investigation, the FAA issued a final rule; request for comments, AD 
2020-16-13 (85 FR 45769, July 30, 2020), requiring replacement of 
certain 3rd-stage compressor wheels installed on RRC AE 3007A, AE 
3007A1, AE 3007A1/1, AE 3007A1/2, AE 3007A1/3, AE 3007A1E, AE 3007A1P, 
and AE 3007A3 model turbofan engines before the 3rd-stage compressor 
wheels accumulate a specified number of cycles. The actions required by 
AD 2020-16-13 address engines that experienced high stresses at the 
3rd-stage compressor wheel location and accumulated cycles at a high 
rate. In the NPRM, the FAA proposed to require replacement of certain 
AE 2100D3 3rd-stage compressor wheels that were produced in the same 
lot as the AE 3007 3rd-stage compressor wheels identified in AD 2020-
16-13, before they accumulate a specified number of cycles. The FAA is 
issuing this AD to address the unsafe condition on these products.

Discussion of Final Airworthiness Directive

Comments

    The FAA received comments from one anonymous commenter. The 
anonymous commenter supported the NPRM without change.

Conclusion

    The FAA reviewed the relevant data, considered the comment 
received, and determined that air safety requires adopting the AD as 
proposed. Accordingly, the FAA is issuing this AD to address the unsafe 
condition on these products. Except for a minor editorial change to the 
contact address for service information, this AD is adopted as proposed 
in the NPRM.

Related Service Information

    The FAA reviewed Rolls-Royce Alert Service Bulletin (ASB) AE 
2100D3-A-72-330, Engine--3rd Stage Compressor Wheel Removal for Reduced 
Life Limit, dated June 11, 2021. The ASB describes procedures for 
removal of a certain 3rd-stage compressor wheel.

Costs of Compliance

    The FAA estimates that this AD affects 15 engines installed on 
airplanes of U.S. registry.
    The FAA estimates the following costs to comply with this AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
Remove and replace 3rd-stage            125 work-hours x $85 per         $32,844         $43,469        $652,035
 compressor wheel.                       hour = $10,625.
----------------------------------------------------------------------------------------------------------------

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 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

    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) 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 Amendment

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

[[Page 73660]]

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:

2022-01-04 Rolls-Royce Corporation (Type Certificate previously held 
by Allison Engine Company): Amendment 39-21892; Docket No. FAA-2021-
0874; Project Identifier AD-2021-00668-E.

(a) Effective Date

    This airworthiness directive (AD) is effective February 2, 2022.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Rolls-Royce Corporation (RRC) AE 2100D3 model 
turboprop engines with a 3rd-stage compressor wheel, part number (P/
N) 23084158, and with a serial number listed in Figure 1 to 
paragraph (c) of this AD.

Figure 1 to Paragraph (c)--Serial Numbers of Affected P/N 23084158 3rd-
stage Compressor Wheels

L343502
L343539
L343545
L343546
L343547
L343550
L343553
L343554
L343555
L343566
L343569
L343573
L343576
L343578
L343579
L343580
L343584
L343588
L343593
L343594
L343597
L343602

(d) Subject

    Joint Aircraft System Component (JASC) Code 7230, Turbine Engine 
Compressor Section.

(e) Unsafe Condition

    This AD was prompted by an in-flight shutdown of an engine 
during a revenue flight and subsequent investigation by the 
manufacturer that revealed a crack in the 3rd-stage compressor 
wheel. The FAA is issuing this AD to prevent failure of the 3rd-
stage compressor wheel. The unsafe condition, if not addressed, 
could result in an uncontained release of the 3rd-stage compressor 
wheel, 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

    Before the affected 3rd-stage compressor wheel exceeds 5,200 
flight cycles since new, remove the affected 3rd-stage compressor 
wheel and replace with a part eligible for installation.

(h) Definition

    For the purpose of this AD, a part eligible for installation is 
a 3rd-stage compressor wheel that does not have a P/N and a serial 
number listed in the Applicability, paragraph (c) of this AD.

(i) Special Flight Permit

    A special flight permit may be issued in accordance with 14 CFR 
21.197 and 21.199 to permit a one-time, non-revenue ferry flight to 
a location where the engine can be removed from service. This ferry 
flight must be performed with only essential flight crew.

(j) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Chicago 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 
certification office, send it to the attention of the person 
identified in paragraph (k) of this AD.
    (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 Kyri Zaroyiannis, 
Aviation Safety Engineer, Chicago ACO, FAA, 2300 E. Devon Avenue, 
Des Plaines, IL 60018; phone: (847) 294-7836; fax: (847) 294-7834; 
email: [email protected].

(l) Material Incorporated by Reference

    None.

    Issued on December 21, 2021.
Lance T. Gant, Director,
Compliance & Airworthiness Division, Aircraft Certification Service.
[FR Doc. 2021-28136 Filed 12-27-21; 8:45 am]
BILLING CODE 4910-13-P
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