82970 Federal Register / Vol. 85, No. 245 / Monday, December 21, 2020 / Proposed Rules 

9See https://ozframework.org/about-index. 

10See 12 U.S.C. 4562(a)(1). 

assess the intended goal of community 

revitalization.9

FHFA requests comment on whether 

and how the objectives of the 

Opportunity Zones program would align 

with the purpose of the Enterprise lowincome areas home purchase subgoal. 

Should FHFA consider giving credit 

under this subgoal for loans on 

properties located in Opportunity 

Zones? What criteria should FHFA use 

to focus on Opportunity Zones that 

would have the largest benefit to a 

community? If included in the subgoal, 

how can FHFA ensure that the loans on 

properties in Opportunity Zones benefit 

these communities? How can FHFA use 

this subgoal to target slow-growing 

communities that need these loans? 

Should FHFA require the use of the 

Opportunity Zone Reporting Framework 

for impact tracking? Are there other 

public policy considerations related to 

Opportunity Zones that FHFA should 

consider? 

Question 4: Is there evidence that the 

Enterprise housing goals have helped 

expand low-income homeownership in 

the marketplace? 

The Safety and Soundness Act directs 

FHFA to evaluate Enterprise support for 

low-income homeownership by 

measuring the low-income share of the 

mortgages that the Enterprises have 

acquired.10

FHFA requests comment on the 

factors it should consider in assessing 

the effectiveness of the Enterprises’ 

activities in expanding low-income 

homeownership. In order to improve the 

housing goals, how should impacts be 

evaluated? What are the appropriate 

counterfactuals to consider? Is it 

possible to determine whether acquired 

mortgages that count toward 

achievement of the goals would have 

been originated in the absence of the 

housing goals? FHFA specifically 

requests comment on whether—and 

under the statute, how—other support 

activities undertaken by the Enterprises 

should be considered when FHFA 

reviews the Enterprises’ performance on 

the single-family housing goals. 

Mark A. Calabria, 

Director, Federal Housing Finance Agency. 

[FR Doc. 2020–28084 Filed 12–18–20; 8:45 am] 

BILLING CODE 8070–01–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–1138; Project 

Identifier MCAI–2020–01258–E] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG (Type 

Certificate Previously Held by RollsRoyce plc) 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 

certain Rolls-Royce Deutschland Ltd & 

Co KG (RRD) Trent 1000–A2, 1000–AE2, 

1000–C2, 1000–CE2, 1000–D2, 1000–E2, 

1000–G2, 1000–H2, 1000–J2, 1000–K2 

and 1000–L2 model turbofan engines. 

This proposed AD was prompted by the 

manufacturer’s analysis which 

determined that cracks may initiate in 

the front seal fins and cause cracks in 

the low-pressure turbine (LPT) disk. 

This proposed AD would require 

repetitive inspection of the seal fins 

and, depending on the results of the 

inspection, replacement of the LPT disk 

before further flight. The FAA is 

proposing this AD to address the unsafe 

condition on these products. 

DATES: The FAA must receive comments 

on this proposed AD by February 4, 

2021. 

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. 

For service information identified in 

this NPRM, contact Rolls-Royce plc, 

P.O. Box 31, Derby, DE24 8BJ, United 

Kingdom, phone: +44 (0)1332 242424; 

website: https://www.rolls-royce.com/ 

contact-us.aspx. 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 (781) 238– 

7759. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–1138; 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, the mandatory continuing 

airworthiness information (MCAI), any 

comments received, and other 

information. The street address for 

Docket Operations is listed above. 

FOR FURTHER INFORMATION CONTACT: 

Kevin M. Clark, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 

District Avenue, Burlington, MA 01803; 

phone: (781) 238–7088; fax: (781) 238– 

7199; email: kevin.m.clark@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 ADDRESSES. Include ‘‘Docket No. 

FAA–2020–1138; Project Identifier 

MCAI–2020–01258–E’’ at the beginning 

of your comments. The most helpful 

comments reference a specific portion of 

the proposal, explain the reason for any 

recommended change, and include 

supporting data. The FAA will consider 

all comments received by the closing 

date and may amend this proposal 

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 

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 NPRM 

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 NPRM, it is important 

that you clearly designate the submitted 

comments as CBI. Please mark each 

page of your submission containing CBI 

Federal Register / Vol. 85, No. 245 / Monday, December 21, 2020 / Proposed Rules 82971 

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 final 

rule. Submissions containing CBI 

should be sent to Kevin Clark, Aviation 

Safety 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. 

Background 

The European Union Aviation Safety 

Agency (EASA), which is the Technical 

Agent for the Member States of the 

European Community, has issued EASA 

AD 2020–0195, dated September 8, 2020 

(referred to after this as ‘‘the MCAI’’), to 

address the unsafe condition on these 

products. The MCAI states: 

Analysis of certain LP turbine discs in 

service has determined that, due to rubbing 

contact with interstage static seals, cracks 

may initiate in the front seal fins which 

could lead to cracks in the disc of the 

affected parts, as defined in this [EASA] AD. 

This condition, if not detected and 

corrected, could lead to crack propagation, 

possibly resulting in LP turbine disc failure 

and high-energy debris release, with 

consequent damage to, and reduced control 

of, the aeroplane. 

To address this potential unsafe condition, 

Rolls-Royce published the NMSB to provide 

inspection instructions. 

For the reason described above, this 

[EASA] AD requires repetitive ultra-high 

sensitivity fluorescent penetrant inspections 

of the seal fins of the affected parts and, 

depending on findings, replacement of 

affected parts. 

You may obtain further information 

by examining the MCAI in the AD 

docket at https://www.regulations.gov 

by searching for and locating Docket No. 

FAA–2020–1138. 

FAA’s Determination 

This product has been approved by 

EASA and is approved for operation in 

the United States. Pursuant to our 

bilateral agreement with the European 

Community, EASA has notified us of 

the unsafe condition described in the 

MCAI and service information 

referenced above. The FAA is issuing 

this NPRM because the agency 

evaluated all the relevant information 

provided by EASA and determined the 

unsafe condition described previously is 

likely to exist or develop on other 

products of the same type design. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Rolls-Royce NonModification Service Bulletin Trent 

1000 72–AK416, dated June 29, 2020 

(the NMSB). The NMSB provides 

instructions for inspecting the LPT stage 

3 disk and the LPT stage 4 disk. This 

service information is reasonably 

available because the interested parties 

have access to it through their normal 

course of business or by the means 

identified in ADDRESSES. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require 

inspection of the seal fins of the LPT 

stage 3 disks and LPT stage 4 disks 

during each engine shop visit after the 

effective date of this AD and, depending 

on the results of the inspection, 

replacement of the LPT stage 3 or LPT 

stage 4 disk before further flight. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 26 

engines installed on airplanes of U.S. 

registry. 

The FAA estimates the following 

costs to comply with this proposed AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Inspect the LPT stage 3 disk and LPT stage 

4 disk.

80 work-hours × $85 per hour = $6,800 ........ $0 $6,800 $176,800 

The FAA estimates the following 

costs to do any necessary replacement 

that would be required based on the 

results of the proposed inspection. The 

FAA has no way of determining the 

number of aircraft that might need this 

replacement. 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Replace LPT stage 3 disk ............................................ 0 work-hours × $85 per hour = $0 ............................... $336,158 $336,158 

Replace LPT stage 4 disk ............................................ 0 work-hours × $85 per hour = $0 ............................... 406,345 406,345 

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 

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) Would not affect intrastate 

aviation in Alaska, and 

82972 Federal Register / Vol. 85, No. 245 / Monday, December 21, 2020 / Proposed Rules 

(3) Would 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 

■ 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: 

Rolls-Royce Deutschland Ltd & Co KG (Type 

Certificate previously held by RollsRoyce plc): Docket No. FAA–2020–1138; 

Project Identifier MCAI–2020–01258–E. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by February 4, 

2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Rolls-Royce 

Deutschland Ltd & Co KG (Type Certificate 

previously held by Rolls-Royce plc) (RRD) 

Trent 1000–A2, 1000–AE2, 1000–C2, 1000– 

CE2, 1000–D2, 1000–E2, 1000–G2, 1000–H2, 

1000–J2, 1000–K2 and 1000–L2 model 

turbofan engines with a low-pressure turbine 

(LPT) stage 3 disk with part number (P/N) 

KH36323, or an LPT stage 4 disk with P/N 

KH33943, installed. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7250, Turbine Section. 

(e) Unsafe Condition 

This AD was prompted by the 

manufacturer’s analysis of certain LPT disks 

in service. The analysis determined that, due 

to rubbing contact with interstage static seals, 

cracks may initiate in the front seal fins, 

which could lead to cracks in the LPT stage 

3 and stage 4 disks. The FAA is issuing this 

AD to prevent failure of the LPT disk. The 

unsafe condition, if not addressed, could 

result in uncontained LPT 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 

(1) During each engine shop visit after the 

effective date of this AD, inspect the seal fins 

of the LPT stage 3 disk and the LPT stage 4 

disk in accordance with the Accomplishment 

Instructions, paragraphs 3.B and 3.C, of the 

Rolls-Royce Alert Non-Modification Service 

Bulletin (NMSB) Trent 1000 72–AK416, 

Initial Issue, dated June 29, 2020. 

(i) For an engine that is in an engine shop 

visit on the effective date of this AD, if the 

LPT stage 3 disk and LPT stage 4 disk are 

exposed, perform the inspection before the 

engine is returned to service. 

(ii) [Reserved] 

(2) If, during any inspection required by 

paragraph (g)(1) of this AD, any crack is 

detected, before further flight, remove the 

affected LPT disk and replace it with a part 

eligible for installation. 

(h) Definitions 

(1) 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, with the exception of the separation 

of engine flanges solely for the purpose of 

transporting the engine without subsequent 

maintenance. 

(2) For the purpose of this AD, a ‘‘part 

eligible for installation’’ is an LPT stage 3 

disk or LPT stage 4 disk with zero flight 

cycles since new, or an LPT stage 3 disk or 

LPT stage 4 disk that has passed the 

inspection required by paragraph (g)(1) of 

this AD. 

(i) 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 Related Information. 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. 

(j) Related Information 

(1) For more information about this AD, 

contact Kevin M. Clark, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: (781) 

238–7088; fax: (781) 238–7199; email: 

kevin.m.clark@faa.gov. 

(2) Refer to European Union Aviation 

Safety Agency (EASA) AD 2020–0195, dated 

September 8, 2020, for more information. 

You may examine the EASA AD in the AD 

docket at https://www.regulations.gov by 

searching for and locating it in Docket No. 

FAA–2020–1138. 

(3) For service information identified in 

this AD, contact Rolls-Royce plc, P.O. Box 

31, Derby, DE24 8BJ, United Kingdom, 

phone: +44 (0)1332 242424; website: https:// 

www.rolls-royce.com/contact-us.aspx. You 

may view this referenced 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 (781) 238–7759. 

Issued on December 15, 2020. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2020–28042 Filed 12–18–20; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–1139; Product 

Identifier 2018–SW–056–AD] 

RIN 2120–AA64 

Airworthiness Directives; Leonardo 

S.p.a. Helicopters 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA is proposing to 

adopt a new airworthiness directive 

(AD) for certain serial-numbered 

Leonardo S.p.a. (Leonardo) Model 

A109S and AW109SP helicopters. This 

proposed AD would require installing a 

placard in the baggage compartment, 

revising the existing Rotorcraft Flight 

Manual (RFM) for your helicopter, and 

inspecting the installation of the 

terminal lugs. Depending on the 

outcome of the inspection, this 

proposed AD would require restoring 

the installation of the terminal lugs. 

This proposed AD would also require 

modifying the helicopter to shim the 

baggage fairing assy (fwd up) away from 

the circuit breaker panel and 

incorporating protective coverings. This 

proposed AD was prompted by reports 

of several occurrences of fire ignition 

and smoke in the baggage compartment. 

The actions of this proposed AD are 

intended to address an unsafe condition 

on these products. 

DATES: The FAA must receive comments 

on this proposed AD by February 4, 

2021. 

ADDRESSES: You may send comments by 

any of the following methods: 

• Federal eRulemaking Docket: Go to 

https://www.regulations.gov. Follow the 

online instructions for sending your 

comments electronically. 

• Fax: 202–493–2251. 

• Mail: Send comments to the U.S. 

Department of Transportation, Docket