Federal Register / Vol. 86, No. 160 / Monday, August 23, 2021 / Proposed Rules 47041 

flange P/N G52–02–201 mounted or having 

been mounted on pulley (12 screws) P/N 

G52–10–100 or G52–10–101, installed on 

cooling fan P/N G52–00–001, and with 500 

or more total hours TIS since new as of the 

effective date of this AD: Within 5 hours TIS 

after the effective date of this AD and 

thereafter at intervals not to exceed 50 hours 

TIS, or 70 engine start-stop cycles, whichever 

occurs first, inspect the cooling fan front 

flange for a crack in accordance with 

He ́licopte`res Guimbal Cabri G2 Maintenance 

Manual (MM) and Instructions for Continued 

Airworthiness J70–002 Issue 06, Section C, 

Airworthiness Limitations, dated December 

6, 2018 (MM J70–002 Issue 06), sub section 

52–A–10 Cooling Fan Inspection, paragraphs 

(c) through (d). If any crack is found, before 

further flight, remove the cooling fan front 

flange from service. 

(ii) Cooling fan front flange P/N G52–02– 

200 mounted on pulley (12 screws) P/N G52– 

10–100 or G52–10–101; and cooling fan front 

flange P/N G52–02–201 mounted or having 

been mounted on pulley (12 screws) P/N 

G52–10–100 or G52–10–101, installed on 

cooling fan P/N G52–00–001, and with less 

than 500 total hours TIS since new as of the 

effective date of this AD: Before 

accumulating 500 total hours TIS since new 

and thereafter at intervals not to exceed 50 

hours TIS, or 70 engine start-stop cycles, 

whichever occurs first, inspect the cooling 

fan front flange for a crack in accordance 

with MM J70–002 Issue 06, sub section 52– 

A–10 Cooling Fan Inspection, paragraphs (c) 

through (d). If any crack is found, before 

further flight, remove the cooling fan front 

flange from service. 

(iii) Cooling fan front flange P/N G52–02– 

201 mounted on pulley (24 screws) P/N G52– 

10–102 and having never been mounted on 

pulley (12 screws) P/N G52–10–100 or G52– 

10–101, installed on cooling fan P/N G52– 

00–002: Before accumulating 500 total hours 

TIS since new and thereafter at intervals not 

to exceed 100 hours TIS, inspect the cooling 

fan front flange for a crack in accordance 

with MM J70–002, Issue 06, sub section 52– 

A–10 Cooling Fan Inspection, paragraphs (c) 

through (d). If any crack is found, before 

further flight, remove the cooling fan front 

flange from service. 

(iv) For helicopters with tail boom P/N 

G65–00–101, G65–00–102 or G65–00–103 

and subsequent installed: Before further 

flight after the effective date of this AD, paint 

or verify the tail boom upper surface in 

accordance with MM J70–002, Issue 06, sub 

section C–23 Tail Structure Paint, as 

applicable to your helicopter. 

(h) Credit for Previous Actions 

This paragraph provides credit for the 

actions specified in paragraph (g)(2)(i), (ii) 

and (iii) of this AD, if those actions were 

performed before the effective date of this AD 

using He ́licopte`res Guimbal Cabri G2 MM 

and Instructions for Continued Airworthiness 

J70–002 Issue 05.1, Section C, Airworthiness 

Limitations, dated October 30, 2015, sub 

section 52–A–10 Cooling Fan Inspection, 

paragraphs (c) through (d). 

(i) 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 (j)(1) 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. 

(j) Related Information 

(1) 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. 

(2) For service information identified in 

this AD, contact He ́licopte`res Guimbal, Basile 

Ginel, 1070, rue du Lieutenant Parayre, 

Ae ́rodrome d’Aix-en-Provence, 13290 Les 

Milles, France; telephone 33–04–42–39–10– 

88; email basile.ginel@guimbal.com; web 

https://www.guimbal.com. You may view 

this referenced 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. 

(3) The subject of this AD is addressed in 

European Aviation Safety Agency (now 

European Union Aviation Safety Agency 

(EASA) AD 2019–0025, dated February 4, 

2019. You may view the EASA AD on the 

internet at https://www.regulations.gov in 

Docket No. FAA–2021–0688. 

Issued on August 16, 2021. 

Gaetano A. Sciortino, 

Deputy Director for Strategic Initiatives, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2021–17944 Filed 8–20–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0689; Project 

Identifier AD–2020–01589–R] 

RIN 2120–AA64 

Airworthiness Directives; Sikorsky 

Aircraft Corporation 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 Sikorsky Aircraft Corporation 

(Sikorsky) Model S–92A helicopters. 

This proposed AD was prompted by a 

cracked main rotor stationary 

swashplate assembly (swashplate 

assembly). This proposed AD would 

require visually inspecting the 

swashplate assembly at specified 

intervals and depending on the results, 

removing the swashplate assembly 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 October 7, 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 your local Sikorsky 

Field Representative or Sikorsky’s 

Service Engineering Group at Sikorsky 

Aircraft Corporation, 124 Quarry Road, 

Trumbull, CT 06611; telephone 1–800– 

946–4337 (1–800–Winged–S); email 

wcs_cust_service_eng.gr-sik@lmco.com. 

Operators may also log on to the 

Sikorsky 360 website at https://

www.sikorsky360.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. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0689; 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. 

FOR FURTHER INFORMATION CONTACT: 

Jared Hyman, Aerospace Engineer, 


jbell on DSKJLSW7X2PROD with PROPOSALS
47042 Federal Register / Vol. 86, No. 160 / Monday, August 23, 2021 / Proposed Rules 

Boston ACO Branch, Compliance & 

Airworthiness Division, FAA, 1200 

District Avenue, Burlington, 

Massachusetts 01803; telephone 781– 

238–7799; email: Jared.M.Hyman@

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–2021–0689; Project Identifier AD– 

2020–01589–R’’ 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 Jared Hyman, 

Aerospace Engineer, Boston ACO 

Branch, Compliance & Airworthiness 

Division, FAA, 1200 District Avenue, 

Burlington, Massachusetts 01803; 

telephone 781–238–7799; email: 

Jared.M.Hyman@faa.gov. 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 FAA was notified of an in-service 

crack in a swashplate assembly inner 

ring. The crack, discovered during a 

routine inspection, extended between 

the uniball bore and near the right-hand 

trunnion to servo attach bolt hole. This 

condition, if not detected and corrected, 

could result in fretting wear on the 

shoulder that supports the clamp-up of 

the uniball outer race, failure of the 

swashplate assembly, and subsequent 

loss of control of the helicopter. 

FAA’s Determination 

The FAA is issuing this NPRM after 

determining that 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 Sikorsky Aircraft 

Corporation Alert Service Bulletin ASB 

92–62–009, Basic Issue, dated February 

6, 2019 (ASB). The ASB specifies a onetime visual inspection of the swashplate 

assembly to determine if there are any 

cracks. If cracks are found, the ASB 

specifies replacing the swashplate 

assembly. If there is any other damage 

such as nicks, dents, or scratches, the 

ASB specifies providing that damage 

information to Sikorsky. The ASB also 

specifies returning the swashplate 

assembly, uniball bearing, trunnions, 

and all attachment hardware to Sikorsky 

for investigation if cracks are found. 

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, 

within 50 hours time-in-service (TIS), 

and thereafter at intervals not to exceed 

50 hours TIS, visually inspecting the 

upper and lower surfaces of the 

swashplate assembly for a crack, nick, 

dent, and scratch. If there is a crack, 

nick, dent, or scratch that exceeds 

allowable limits, this proposed AD 

would require removing the swashplate 

assembly from service before further 

flight. 

Differences Between This Proposed AD 

and the Service Information 

The ASB specifies a one-time visual 

inspection of the swashplate assembly; 

this proposed AD would require 

repetitive visual inspections of the 

swashplate assembly to determine if any 

crack, nick, dent, or scratch develops 

over time. This proposed AD would not 

require returning parts to or contacting 

Sikorsky, while the ASB specifies 

performing those actions. 

Costs of Compliance 

The FAA estimates that this AD 

would affect 89 helicopters of U.S. 

Registry and that operators may incur 

the following costs in order to comply 

with this proposed AD. Labor costs are 

estimated at $85 per work-hour. 

Visually inspecting a swashplate 

assembly would take about 0.5 workhour, for an estimated cost of $43 per 

helicopter and $3,827 for the U.S. fleet, 

per inspection cycle. 

Replacing the swashplate assembly, if 

required, would take about 16 workhours and parts would cost about 

$389,720, for an estimated cost of 

$391,080 per helicopter. 

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. 


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Federal Register / Vol. 86, No. 160 / Monday, August 23, 2021 / Proposed Rules 47043 

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: 

Sikorsky Aircraft Corporation: Docket No. 

FAA–2021–0689; Project Identifier AD– 

2020–01589–R. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by October 7, 

2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Sikorsky Aircraft 

Corporation Model S–92A helicopters, 

certificated in any category, with a main rotor 

stationary swashplate assembly (swashplate 

assembly) part number (P/N) 92104–15011– 

042 or P/N 92104–15011–043 that has 

accumulated 1,600 or more total hours timein-service, installed. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code/Air Transport Association (ATA) of 

America Code 6230, Main Rotor Mast/ 

Swashplate. 

(e) Unsafe Condition 

This AD was prompted by the discovery of 

a crack on the swashplate assembly inner 

ring. This condition, if not detected and 

corrected, could result in fretting wear on the 

shoulder that supports the clamp-up of the 

uniball outer race, failure of the swashplate 

assembly, and subsequent loss of control of 

the helicopter. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) Within 50 hours time-in-service (TIS) 

after the effective date of this AD, and 

thereafter at intervals not to exceed 50 hours 

TIS, visually inspect the swashplate 

assembly for a crack, nick, dent, and scratch, 

by following the Accomplishment 

Instructions, Section 3, paragraph B. (except 

paragraphs B.(2)(a) through (c)) of Sikorsky 

Aircraft Corporation Alert Service Bulletin 

ASB 92–62–009, Basic Issue, dated February 

6, 2019. 

(2) If there is a crack, nick, dent, or scratch 

that exceeds the allowable limits, before 

further flight, remove the swashplate 

assembly from service. 

(h) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Boston ACO, Compliance 

& Airworthiness Division, 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. 

(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 

(1) For more information about this AD, 

contact Jared Hyman, Aerospace Engineer, 

Boston ACO Branch, Compliance & 

Airworthiness Division, FAA, 1200 District 

Avenue, Burlington, Massachusetts 01803; 

telephone 781–238–7799; email: 

Jared.M.Hyman@faa.gov. 

(2) For service information identified in 

this AD, contact your local Sikorsky Field 

Representative or Sikorsky’s Service 

Engineering Group at Sikorsky Aircraft 

Corporation, 124 Quarry Road, Trumbull, CT 

06611; telephone 1–800–946–4337 (1–800– 

Winged–S); email wcs_cust_service_eng.grsik@lmco.com. Operators may also log on to 

the Sikorsky 360 website at https://

www.sikorsky360.com. You may view this 

referenced service information at the FAA, 

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. 

Issued on August 16, 2021. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2021–17948 Filed 8–20–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

Proposed Amendment of Class C 

Airspace at Chicago Midway 

International Airport, IL; Public 

Meeting 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notification of meeting. 

SUMMARY: This document announces a 

fact-finding informal airspace meeting 

regarding a plan to amend the Class C 

Airspace at Chicago Midway 

International Airport, IL. The purpose of 

the meeting is to solicit aeronautical 

comments on the proposal’s effects on 

local aviation operations. All comments 

received during the meeting, and the 

subsequent comment period, will be 

considered prior to the issuance of a 

notice of proposed rulemaking. 

DATES: The meetings will be held on 

Tuesday, September 28, 2021, beginning 

at 1:00 p.m. (Central Time) and on 

Wednesday, September 29, 2021, 

beginning at 6:00 p.m. (Central Time). 

Comments must be received on or 

before Friday, October 29, 2021. Each 

registered participant that indicated 

they would like to make comments 

during the meeting will be given an 

opportunity to deliver their comments 

or make a presentation, although a time 

limit may be imposed to accommodate 

closing times. 

ADDRESSES:

Format: This will be a virtual 

informal airspace meeting using the 

Zoom teleconferencing tool. The 

meeting will also be available to watch 

on the FAA’s Facebook, Twitter, and 

YouTube social media channels. 

Comments: Send comments on the 

proposal, not later than October 29, 

2021, to: Christopher Southerland, 

Manager, Operations Support Group, 

Central Service Area, Air Traffic 

Organization, Federal Aviation 

Administration, 10101 Hillwood 

Parkway, Fort Worth, TX 76177; or via 

email to: 9-ASW-CSC-OSG-AirspaceComments@faa.gov, please include 

MDW Class C in the email subject line. 

FOR FURTHER INFORMATION CONTACT: Al 

Qualiardi, Support Manager, Chicago 

District, Chicago Terminal Radar 

Approach Control (TRACON), Air 

Traffic Organization, 1100 Bowes Road, 

Elgin, IL, 60123. Telephone: (847) 608– 

5591. 

SUPPLEMENTARY INFORMATION: 

Meeting Procedures: 

The meeting will provide interested 

parties an opportunity to present views, 

recommendations, and comments on the 

proposed airspace amendment. 

(a) Registration: To attend the 

meeting, members of the public are 

asked to register at https://zoom.us/ 

webinar/register/WN_1MpVHlbdRH

S4SeyIMgxcqw for the Tuesday, 

September 28, 2021, meeting and at 

https://zoom.us/webinar/register/WN_

zY2MTFJnQDynDG1-tZS16g for the 

Wednesday, September 29, 2021, 

meeting. When registration is 

confirmed, registrants will be provided 


jbell on DSKJLSW7X2PROD with PROPOSALS