40964 Federal Register / Vol. 86, No. 144 / Friday, July 30, 2021 / Proposed Rules 

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 

(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: 

Leonardo S.p.a.: Docket No. FAA–2021– 

0608; Project Identifier 2019–SW–119– 

AD. 

(a) Comments Due Date 

The FAA must receive comments by 

September 13, 2021. 

(b) Affected Airworthiness Directives (ADs) 

None. 

(c) Applicability 

This AD applies to Leonardo S.p.a. Model 

AB139, AW139, AB412, and AB412 EP, 

helicopters, certificated in any category, with 

an affected part as identified in European 

Union Aviation Safety Agency (EASA) AD 

2019–0311, dated December 19, 2019 (EASA 

AD 2019–0311), installed. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code: 3212, Emergency Flotation Section. 

(e) Unsafe Condition 

This AD was prompted by failure of an 

Emergency Flotation System (EFS) float 

compartment to inflate during maintenance 

of the EFS. The FAA is issuing this AD to 

address a blocked float supply hose. The 

unsafe condition, if not addressed, could 

result in partial inflation of an EFS float 

during an emergency landing on water and 

subsequently preventing a timely egress from 

the helicopter, which could result in injury 

to helicopter occupants. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Requirements 

Except as specified in paragraph (h) of this 

AD: Comply with all required actions and 

compliance times specified in, and in 

accordance with, EASA AD 2019–0311. 

(h) Exceptions to EASA AD 2019–0311 

(1) Where EASA AD 2019–0311 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

(2) Where EASA AD 2019–0311 requires 

compliance in terms of flight hours, this AD 

requires using hours time-in-service (TIS). 

(3) Where paragraph (1) of EASA AD 2019– 

0311 requires inspecting each affected part 

within the compliance time specified in 

Table 2 of its AD, this AD requires: 

(i) Inspecting each affected part in Group 

A within 100 hours TIS after the effective 

date of this AD. 

(ii) Inspecting each affected part in Group 

C within 15 hours TIS after the effective date 

of this AD. 

(4) Where the service information 

referenced in paragraph (1) of EASA AD 

2019–0311 specifies ‘‘operator able to 

perform the EFS maintenance in accordance 

with Aircraft Maintenance Manual (AMM) or 

Aircraft Maintenance Publication (AMP) can 

perform the procedure defined in this Service 

Bulletin,’’ this AD requires that the work be 

accomplished by a mechanic that meets the 

requirements of 14 CFR part 65 subpart D. 

(5) Where paragraph (2) of EASA AD 2019– 

0311 specifies replacing an EFS supply hose 

that fails the inspection, this AD requires 

removing the hose from service. 

(6) This AD does not require the 

‘‘Remarks’’ section of EASA AD 2019–0311. 

(i) No Reporting Requirement 

Although the service information 

referenced in EASA AD 2019–0311 specifies 

to submit certain information to the 

manufacturer, this AD does not include that 

requirement. 

(j) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, International Validation 

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 International Validation 

Branch, send it to the attention of the person 

identified in paragraph (k)(2) of this AD. 

Information may be emailed to: 9-AVS-AIR730-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 

(1) For EASA AD 2019–0311, contact the 

EASA, Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 8999 

000; email ADs@easa.europa.eu; internet 

www.easa.europa.eu. You may find this 

EASA AD on the EASA website at https://

ad.easa.europa.eu. You may view this 

material at the FAA, Office of the Regional 

Counsel, Southwest Region, 10101 Hillwood 

Pkwy., Room 6N–321, Fort Worth, TX 76177. 

For information on the availability of this 

material at the FAA, call 817–222–5110. This 

material may be found in the AD docket at 

https://www.regulations.gov by searching for 

and locating Docket No. FAA–2021–0608. 

(2) For more information about this AD, 

contact Andrea Jimenez, Aerospace Engineer, 

COS Program Management Section, 

Operational Safety Branch, Compliance & 

Airworthiness Division, FAA, 1600 Stewart 

Ave., Suite 410, Westbury, NY 11590; 

telephone (516) 228–7330; email 

andrea.jimenez@faa.gov. 

Issued on July 23, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–16168 Filed 7–29–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0606; Project 

Identifier 2019–SW–070–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 proposes to adopt a 

new airworthiness directive (AD) for 

certain Leonardo S.p.a. Model A109E, 

A109S, and AW109SP helicopters. This 

proposed AD was prompted by reports 

of main landing gear (MLG) wheel 

assembly failure. This proposed AD 

would require repetitive inspections of 

each affected MLG strut assembly and, 

depending on the findings, replacement 

of an affected MLG strut assembly with 

a serviceable assembly, or application of 

corrosion preventive compound, as 


lotter on DSK11XQN23PROD with PROPOSALS1
Federal Register / Vol. 86, No. 144 / Friday, July 30, 2021 / Proposed Rules 40965 

specified in a European Union Aviation 

Safety Agency (EASA) AD, which is 

proposed for incorporation by reference 

(IBR). 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 September 13, 

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 EASA material that is proposed 

for IBR in this AD, contact EASA, 

Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 

8999 000; email ADs@easa.europa.eu; 

internet www.easa.europa.eu. You may 

find this IBR material on the EASA 

website at https://ad.easa.europa.eu. 

You may view this material at the FAA, 

Office of the Regional Counsel, 

Southwest Region, 10101 Hillwood 

Pkwy., Room 6N–321, Fort Worth, TX 

76177. For information on the 

availability of this material at the FAA, 

call (817) 222–5110. This EASA 

material is also available at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2021– 

0606. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0606; 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 EASA AD, any comments 

received, and other information. The 

street address for Docket Operations is 

listed above. 

FOR FURTHER INFORMATION CONTACT: 

Darren Gassetto, Aerospace Engineer, 

COS Program Management Section, 

Operational Safety Branch, Compliance 

& Airworthiness Division, FAA, 1600 

Stewart Ave., Suite 410, Westbury, NY 

11590; telephone (516) 228–7323; email 

Darren.Gassetto@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–2021–0606; Project Identifier 

2019–SW–070–AD’’ 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 

agency 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 

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 

NPRM. Submissions containing CBI 

should be sent to Darren Gassetto, 

Aerospace Engineer, COS Program 

Management Section, Operational 

Safety Branch, Compliance & 

Airworthiness Division, FAA, 1600 

Stewart Ave., Suite 410, Westbury, NY 

11590; telephone (516) 228–7323; email 

Darren.Gassetto@faa.gov. Any 

commentary that the FAA receives that 

is not specifically designated as CBI will 

be placed in the public docket for this 

rulemaking. 

Background 

EASA, which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA AD 2019–0182, 

dated July 26, 2019 (EASA AD 2019– 

0182), to correct an unsafe condition for 

Leonardo S.p.A. Helicopters, formerly 

Finmeccanica S.p.A. Helicopter 

Division, AgustaWestland S.p.A., 

Agusta S.p.A. Model A109E, A109LUH, 

A109S and AW109SP helicopters, all 

serial numbers. Model A109LUH 

helicopters are not certificated by the 

FAA and are not included on the U.S. 

type certificate data sheet; this AD 

therefore does not include those 

helicopters in the applicability. 

Although EASA AD 2019–0182 applies 

to Model A109E, A109S and AW109SP 

helicopters, all manufacturer serial 

numbers, this proposed AD would 

apply to helicopters with an affected 

assembly installed. 

This proposed AD was prompted by 

reports of MLG wheel assembly failure 

on Model A109E helicopters. 

Subsequent investigations identified 

stress corrosion and hydrogen 

embrittlement on the threaded end of 

the MLG strut, where lack of cadmium 

plating was observed, and determined 

that a certain batch of ‘‘enhanced’’ 

MLGs may be affected. Due to design 

similarity Model A109S and AW109SP 

helicopters are also affected. The FAA is 

proposing this AD to address stress 

corrosion and hydrogen embrittlement 

on the threaded end of the MLG strut in 

the MLG wheel assembly. This 

condition, if not addressed, could lead 

to cracks on the affected MLG assembly, 

resulting in damage or failure of the 

MLG and consequent damage to the 

helicopter and injury to occupants. See 

EASA AD 2019–0182 for additional 

background information. 

Related Service Information Under 1 

CFR Part 51 

EASA AD 2019–0182 requires 

repetitive inspections of each affected 

MLG assembly and, depending on the 

findings, replacement of an affected 

MLG strut assembly with a serviceable 

assembly, or application of corrosion 

preventive compound. EASA AD 2019– 

0182 allows the installation of an 

affected MLG strut assembly on any 

helicopter, provided it is a serviceable 

assembly, as defined in EASA AD 2019– 

0182. 

This material is reasonably available 

because the interested parties have 

access to it through their normal course 

of business or by the means identified 

in the ADDRESSES section. 

FAA’s Determination 

These helicopters have been approved 

by EASA and are approved for operation 

in the United States. Pursuant to the 

FAA’s bilateral agreement with the 

European Union, EASA has notified the 

FAA about the unsafe condition 

described in its AD. The FAA is 


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40966 Federal Register / Vol. 86, No. 144 / Friday, July 30, 2021 / Proposed Rules 

proposing this AD after evaluating all 

known relevant information and 

determining that the unsafe condition 

described previously is likely to exist or 

develop on other helicopters of these 

same type designs. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require 

accomplishing the actions specified in 

EASA AD 2019–0182, described 

previously, as incorporated by 

reference, except for any differences 

identified as exceptions in the 

regulatory text of this proposed AD. 

Explanation of Required Compliance 

Information 

In the FAA’s ongoing efforts to 

improve the efficiency of the AD 

process, the FAA developed a process to 

use some civil aviation authority (CAA) 

ADs as the primary source of 

information for compliance with 

requirements for corresponding FAA 

ADs. The FAA has been coordinating 

this process with manufacturers and 

CAAs. As a result, the FAA proposes to 

incorporate EASA AD 2019–0182 by 

reference in the FAA final rule. This 

proposed AD would, therefore, require 

compliance with EASA AD 2019–0182 

in its entirety through that 

incorporation, except for any differences 

identified as exceptions in the 

regulatory text of this proposed AD. 

Using common terms that are the same 

as the heading of a particular section in 

EASA AD 2019–0182 does not mean 

that operators need comply only with 

that section. For example, where the AD 

requirement refers to ‘‘all required 

actions and compliance times,’’ 

compliance with this AD requirement is 

not limited to the section titled 

‘‘Required Action(s) and Compliance 

Time(s)’’ in EASA AD 2019–0182. 

Service information required by EASA 

AD 2019–0182 for compliance will be 

available at https://www.regulations.gov 

by searching for and locating Docket No. 

FAA–2021–0606 after the FAA final 

rule is published. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 99 

helicopters 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 

Inspection and application of corrosion 

protective compound.

2 work-hours × $85 per hour = $170 

per inspection cycle.

$17 per inspection 

cycle.

$187 per inspection cycle.$18,513 per inspection cycle. 

The FAA estimates the following 

costs to do any necessary replacement 

actions that would be required based on 

the results of the proposed inspection. 

The agency 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 

Replacement of damaged MLG strut assembly ........... 3 work-hours × $85 per hour = $255 ........................... $28,100 $28,355 

The FAA has included all known 

costs in its cost estimate. According to 

the manufacturer, however, some of the 

costs of this proposed AD may be 

covered under warranty, thereby 

reducing the cost impact on affected 

operators. 

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 

(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: 


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Federal Register / Vol. 86, No. 144 / Friday, July 30, 2021 / Proposed Rules 40967 

Leonardo S.p.a.: Docket No. FAA–2021– 

0606; Project Identifier 2019–SW–070– 

AD. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by September 

13, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Leonardo S.p.a. Model 

A109E, A109S, and AW109SP helicopters, 

certificated in any category, with an affected 

assembly as identified in European Union 

Aviation Safety Agency (EASA) AD 2019– 

0182, dated July 26, 2019 (EASA AD 2019– 

0182) installed. 

(d) Subject 

Joint Aircraft Service Component (JASC) 

Code: 3213, Main Landing Gear Strut/Axle/ 

Truck. 

(e) Unsafe Condition 

This AD was prompted by reports of main 

landing gear (MLG) wheel assembly failure. 

The FAA is issuing this AD to address stress 

corrosion and hydrogen embrittlement on the 

threaded end of the MLG strut in the MLG 

wheel assembly. This condition, if not 

addressed, could lead to cracks on the 

affected MLG assembly, resulting in damage 

or failure of the MLG and consequent damage 

to the helicopter and injury to occupants. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Requirements 

Except as specified in paragraph (h) of this 

AD: Comply with all required actions and 

compliance times specified in, and in 

accordance with, EASA AD 2019–0182. 

(h) Exceptions to EASA AD 2019–0182 

(1) Where EASA AD 2019–0182 refers to 

flight hours (FH), this AD requires using 

hours time-in-service. 

(2) Where EASA AD 2019–0182 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

(3) Where the service information 

referenced in EASA AD 2019–0182 specifies 

to return a certain part, this AD does not 

include that requirement. 

(4) The ‘‘Remarks’’ section of EASA AD 

2019–0182 does not apply to this AD. 

(5) Where the service information 

referenced in EASA AD 2019–0182 specifies 

to discard certain parts, this AD requires 

removing those parts from service. 

(6) Where Annex A of the service 

information referenced in EASA AD 2019– 

0182 specifies to contact the manufacturer if 

there is any indication of cracking due to 

‘‘some burr’’; and Annex B of the service 

information specifies to contact the 

manufacturer if there are signs of arcing or 

burning on a part; before further flight, the 

instructions or corrective actions (including 

part replacement if necessary) must be 

accomplished using a method approved by 

the Manager, International Validation 

Branch, FAA; or EASA; or Leonardo S.p.A.’s 

EASA Design Organization Approval (DOA). 

If approved by the DOA, the approval must 

include the DOA-authorized signature. 

(i) No Reporting Requirement 

Although the service information 

referenced in EASA AD 2019–0182 specifies 

to submit certain information to the 

manufacturer, this AD does not include that 

requirement. 

(j) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, International Validation 

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 International Validation 

Branch, send it to the attention of the person 

identified in paragraph (k)(2) of this AD. 

Information may be emailed to: 9-AVS-AIR730-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 

(1) For EASA AD 2019–0182, contact 

EASA, Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 8999 

000; email ADs@easa.europa.eu; internet 

www.easa.europa.eu. You may view this 

material at the FAA, Office of the Regional 

Counsel, Southwest Region, 10101 Hillwood 

Pkwy., Room 6N–321, Fort Worth, TX 76177. 

For information on the availability of this 

material at the FAA, call (817) 222–5110. 

This material may be found in the AD docket 

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

for and locating Docket No. FAA–2021–0606. 

(2) For more information about this AD, 

contact Darren Gassetto, Aerospace Engineer, 

COS Program Management Section, 

Operational Safety Branch, Compliance & 

Airworthiness Division, FAA, 1600 Stewart 

Ave., Suite 410, Westbury, NY 11590; 

telephone (516) 228–7323; email 

Darren.Gassetto@faa.gov. 

Issued on July 21, 2021. 

Gaetano A. Sciortino, 

Deputy Director for Strategic Initiatives, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2021–16169 Filed 7–29–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0610; Project 

Identifier AD–2021–00126–R] 

RIN 2120–AA64 

Airworthiness Directives; Brantly 

Helicopters Industries U.S.A. Co., Ltd., 

and Brantly International, Inc., 

Helicopters 

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 Brantly Helicopters Industries 

U.S.A. Co., Ltd., Model 305 helicopters 

and Brantly International, Inc., Model 

B–2, B–2A, and B–2B helicopters. This 

proposed AD was prompted by a report 

of a crack in the tail rotor (T/R) hub. 

This proposed AD would require 

repetitive inspections of the T/R hub 

and depending on the results, removing 

the T/R hub from service. 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 September 13, 

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 Brantly 

International, Inc., Bill Ross, 621 S 

Royal Lane, Suite 100, Coppell, TX 

75019; phone: (972) 829–4699; email: 

bross@superiorairparts.com. You may 

view this service information at the 

FAA, Office of the Regional Counsel, 

Southwest Region, 10101 Hillwood 

Pkwy., Room 6N–321, Fort Worth, TX 

76177. For information on the 

availability of this material at the FAA, 

call (817) 222–5110. 


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