Federal Register / Vol. 87, No. 10 / Friday, January 14, 2022 / Proposed Rules 2365 

(g) Required Actions 

(1) For Model 429 helicopters serial 

number (S/N) 57001 through 57296 

inclusive, within 12 months after the 

helicopter was manufactured or 30 days after 

the effective date of this AD, whichever 

occurs later, and thereafter at intervals not to 

exceed 6 months: 

(i) Disconnect the forward ends of the 

collective control tube, longitudinal stability 

and control augmentation system (SCAS) 

actuator, and lateral SCAS actuator. Stow the 

collective control tube and each SCAS 

actuator to prevent binding. 

(ii) Move the cyclic stick fore, aft, and 

laterally, and the collective stick up and 

down from stop to stop to determine if there 

is any roughness. If there is any roughness in 

the flight control system, before further flight, 

remove each pivot bearing P/N MS27646–41, 

each arm assembly bearing P/N MS27643–4, 

and each sleeve P/N 120–13–4A from service 

and install bellcrank assemblies P/N 429– 

001–523–101FM and 429–001–532–101FM; 

or 429–001–523–107FM and 429–001–532– 

107FM; or 429–001–523–107 and 429–001– 

532–107. 

(iii) Inspect the collective arm assembly 

P/N 429–001–525–101, the lateral arm 

assembly P/N 429–001–527–101, and the 

longitudinal arm assembly P/N 429–001– 

530–101, by rotating each bearing and 

determining whether each bearing rotates 

freely. If there is any binding in any arm end 

bearing or on the longitudinal bellcrank 

assembly, before further flight, remove each 

pivot bearing P/N MS27646–41, each arm 

assembly bearing P/N MS27643–4, and each 

sleeve P/N 120–13–4A from service and 

install bellcrank assemblies P/N 429–001– 

523–101FM and 429–001–532–101FM; or 

429–001–523–107FM and 429–001–532– 

107FM; or 429–001–523–107 and 429–001– 

532–107. 

(2) For Model 429 helicopters S/N 57001 

through 57296 inclusive, unless already 

accomplished by following paragraphs 

(g)(1)(ii) or (iii) of this AD, within 24 months 

after the effective date of this AD, install 

bellcrank assemblies P/N 429–001–523– 

101FM and 429–001–532–101FM; or 429– 

001–523–107FM and 429–001–532–107FM; 

or 429–001–523–107 and 429–001–532–107. 

(3) As of the effective date of this AD, 

installing bellcrank assemblies P/N 429–001– 

523–101FM and 429–001–532–101FM; or 

429–001–523–107FM and 429–001–532– 

107FM; or 429–001–523–107 and 429–001– 

532–107, constitutes a terminating action for 

the recurring inspections required by 

paragraph (g)(1) of this AD. 

(4) As of the effective date of this AD, do 

not install any bellcrank assembly P/N 429– 

001–523–101, 429–001–523–103, 429–001– 

532–101 or 429–001–532–103 on any 

helicopter. 

(h) Special Flight Permits 

Special flight permits are prohibited. 

(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 Bell Textron Canada 

Limited, 12,800 Rue de l’Avenir, Mirabel, 

Quebec J7J 1R4, Canada; telephone 1–450– 

437–2862 or 1–800–363–8023; fax 1–450– 

433–0272; email productsupport@

bellflight.com; or at https://

www.bellflight.com/support/contact-support. 

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 

Transport Canada AD CF–2016–11R3, dated 

August 30, 2021. You may view the 

Transport Canada AD on the internet at 

https://www.regulations.gov in Docket No. 

FAA–2021–1178. 

Issued on January 4, 2022. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2022–00164 Filed 1–13–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–1071; Project 

Identifier AD–2021–01055–E] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Corporation Turboshaft Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to 

supersede Airworthiness Directive (AD) 

2017–18–14, which applies to certain 

Rolls-Royce Corporation (RRC) 250 

model turboshaft engines. AD 2017–18– 

14 requires repetitive visual inspections 

and fluorescent penetrant inspections 

(FPIs) of the 3rd-stage turbine wheel and 

removal from service of the 4th-stage 

turbine wheel. Since the FAA issued AD 

2017–18–14, the manufacturer 

redesigned the 3rd-stage turbine wheel. 

This proposed AD would require 

replacement of the 3rd-stage and 4thstage turbine wheels. This proposed AD 

would also revise the applicability to 

add an additional turboshaft engine 

model. 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 28, 

2022. 

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 

Corporation, 450 South Meridian Street, 

Mail Code NB–01–06, Indianapolis, IN 

46225; phone: (317) 230–2720; email: 

HelicoptCustSupp@Rolls-Royce.com; 

website: www.rolls-royce.com. You may 

view this service information at the 

Airworthiness Products Section, 

Operational Safety Branch, FAA, 1200 

District Avenue, Burlington, MA 01803. 

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–2021–1071; 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: John 

Tallarovic, Aviation Safety Engineer, 

Chicago ACO, FAA, 2300 E Devon 

Avenue, Des Plaines, IL 60018; phone: 


lotter on DSK11XQN23PROD with PROPOSALS1
2366 Federal Register / Vol. 87, No. 10 / Friday, January 14, 2022 / Proposed Rules 

(847) 294–8180; fax: (847) 294–7834; 

email: john.m.tallarovic@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–2021–1071; Project Identifier AD– 

2021–01055–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 the 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 we receive about this proposed 

AD. 

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 John Tallarovic, 

Aviation Safety Engineer, Chicago ACO, 

FAA, 2300 E. Devon Avenue, Des 

Plaines, IL 60018. 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 issued AD 2017–18–14, 

Amendment 39–19023 (82 FR 42443, 

September 8, 2017), (AD 2017–18–14), 

for RRC 250–C20, –C20B, –C20F, –C20J, 

–C20R, –C20R/1, –C20R/2, –C20R/4, 

–C20W, –C300/A1, and –C300/B1 

turboshaft engines with either a 3rdstage turbine wheel, part number (P/N) 

23065818, or a 4th-stage turbine wheel, 

P/N 23055944 or RR30000240, installed. 

AD 2017–18–14 was prompted by inservice turbine blade failures that 

revealed the need for changes to the 

inspections of a certain 3rd-stage 

turbine wheel and removal from service 

of a certain 4th-stage turbine wheel. AD 

2017–18–14 requires repetitive visual 

inspections and FPIs of the 3rd-stage 

turbine wheel and removal from service 

of the 4th-stage turbine wheel. AD 

2017–18–14 also revises the 

applicability to remove all RRC 

turboprop engines and adds additional 

turboshaft engines. The agency issued 

AD 2017–18–14 to prevent failure of the 

3rd-stage and 4th-stage turbine wheel 

blades, damage to the engine, and 

damage to the aircraft. 

Actions Since AD 2017–18–14 Was 

Issued 

Since the FAA issued AD 2017–18– 

14, the manufacturer redesigned the 

3rd-stage turbine wheel. The 

manufacturer has issued Rolls-Royce 

(RR) Alert Commercial Engine Bulletin 

(CEB) CEB A–1428/CEB A–72–4111 

(single document), specifying 

procedures for replacement of the 3rdstage turbine wheel, P/N 23065818, with 

the new increased blade fillet 3rd-stage 

turbine wheel, P/N M250–10473. 

Additionally, the FAA determined that 

the RRC 250–C20C (T63–A–720) model 

turboshaft engine is also susceptible to 

the unsafe condition. The FAA, 

therefore, added RRC 250–C20C (T63– 

A–720) model turboshaft engines to the 

applicability of this proposed AD. The 

FAA is proposing this AD to require the 

replacement of 3rd-stage and 4th-stage 

turbine wheels with redesigned 3rdstage and 4th-stage turbine wheels. 

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 

The FAA reviewed RR Alert CEB CEB 

A–1428/CEB A–72–4111 (single 

document), Revision 1, dated September 

29, 2021. This service information 

describes procedures for replacing the 

3rd-stage turbine wheel, P/N 23065818, 

with the new increased blade fillet 3rdstage turbine wheel, P/N M250–10473. 

The FAA reviewed Rolls-Royce Alert 

CEB CEB–A–1422/CEB–A–72–4108 

(single document), Original Issue, dated 

September 13, 2017. This service 

information describes procedures for 

replacing 4th-stage turbine wheel, P/N 

23055944, with the new increased fillet 

4th-stage turbine wheel, P/N M250– 

10445. 

The FAA also reviewed Rolls-Royce 

Alert Service Bulletin SB RR300–A–72– 

024, Original Issue, dated September 13, 

2017. This service information describes 

procedures for replacing the 4th-stage 

turbine wheel, P/N RR30000240, with 

the new increased fillet 4th-stage 

turbine wheel, P/N RR30000494. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require 

removal and replacement of the 3rdstage and 4th-stage turbine wheels. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 3,041 

3rd-stage stage turbine wheels and 3,769 

4th-stage stage turbine wheels installed 

on 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 

Replace 3rd-stage turbine wheel, P/N 

23065818.

3 work-hours × $85 per hour = $255 ...... $11,170 $11,425 $34,743,425 (3,041 

engines). 

Replace 4th-stage turbine wheel, P/N 

23055944 or RR30000240.

3 work-hours × $85 per hour = $255 ...... 8,928 9,183 $34,610,727 (3,769 

engines). 


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Federal Register / Vol. 87, No. 10 / Friday, January 14, 2022 / Proposed Rules 2367 

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 

individuals. 

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 that the 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: 

■ a. Removing Airworthiness Directive 

2017–18–14, Amendment 39–19023 (82 

FR 42443, September 8, 2017); and 

■ b. Adding the following new 

airworthiness directive: 

Rolls-Royce Corporation: Docket No. FAA– 

2021–1071; Project Identifier AD–2021– 

01055–E. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) action by 

February 28, 2022. 

(b) Affected ADs 

This AD replaces AD 2017–18–14, 

Amendment 39–19023 (82 FR 42443, 

September 8, 2017). 

(c) Applicability 

This AD applies to Rolls-Royce 

Corporation (RRC) 250–C20, 250–C20B, 250– 

C20C (T63–A–720), 250–C20F, 250–C20J, 

250–C20R, 250–C20R/1, 250–C20R/2, 250– 

C20R/4, 250–C20W, 250–C300/A1, and 250– 

C300/B1 model turboshaft engines with 

either a 3rd-stage turbine wheel, part number 

(P/N) 23065818, or a 4th-stage turbine wheel, 

P/N 23055944 or RR30000240, installed. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7250, Turbine Section. 

(e) Unsafe Condition 

This AD was prompted by in-service 

turbine blade failures that resulted in the loss 

of power and engine in-flight shutdowns. 

The FAA is issuing this AD to prevent failure 

of the 3rd-stage and 4th-stage turbine blades. 

The unsafe condition, if not addressed, could 

result in damage to the engine and damage 

to the aircraft. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) Within 1,775 hours since last visual 

inspection and fluorescent penetrant 

inspection (FPI), or at the next engine shop 

visit, whichever occurs first after the effective 

date of this AD, remove: 

(i) 3rd-stage turbine wheel, P/N 23065818, 

and replace with a part eligible for 

installation. 

(ii) 4th-stage turbine wheel, P/N 23055944, 

and replace with a part eligible for 

installation. 

(2) Within 2,025 hours since last visual 

inspection and FPI inspection, or at the next 

engine shop visit, whichever occurs first after 

the effective date of this AD, remove 4thstage turbine wheel, P/N RR30000240, and 

replace with a part eligible for installation. 

(h) Definitions 

(1) For this purpose of this AD, an ‘‘engine 

shop visit’’ is the induction of an engine into 

the shop for maintenance in which the 

turbine module is separated from the exhaust 

collector, the gas-producer-support is 

separated from the power-turbine-support, or 

there is separation of pairs of major mating 

engine flanges, except that the separation of 

engine flanges solely for the purposes of 

transportation without subsequent engine 

maintenance does not constitute an engine 

shop visit. 

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

eligible for installation’’ is a 3rd-stage turbine 

wheel or 4th-stage turbine wheel that does 

not have a P/N 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 operate the airplane to a maintenance 

facility 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 John Tallarovic, Aviation Safety 

Engineer, Chicago ACO, FAA, 2300 E Devon 

Avenue, Des Plaines, IL 60018; phone: (847) 

294–8180; fax: (847) 294–7834; email: 

john.m.tallarovic@faa.gov. 

Issued on December 9, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–00232 Filed 1–13–22; 8:45 am] 

BILLING CODE 4910–13–P 


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