Federal Register / Vol. 87, No. 63 / Friday, April 1, 2022 / Proposed Rules 19029 

course information on flight management 

systems (FMSs). The FAA is issuing this AD 

to prevent operation outside the terrain and 

obstacle protection provided in instrument 

procedure and route designs, which could 

result in reduced operational safety margins. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Amend Existing Airplane Flight Manual 

(AFM) 

Within 30 days after the effective date of 

this AD: Revise the existing AFM to 

incorporate the information specified in 

Section 05–15—Instrument Systems, of 

Chapter 5, ABNORMAL PROCEDURES, of 

the applicable AFM identified in Figure 1 to 

paragraph (g) of this AD. 

(h) Other FAA AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York ACO 

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 ATTN: Program Manager, 

Continuing Operational Safety, FAA, New 

York ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; telephone 

516–228–7300. 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. 

(2) Contacting the Manufacturer: For any 

requirement in this AD to obtain instructions 

from a manufacturer, the instructions must 

be accomplished using a method approved 

by the Manager, New York ACO Branch, 

FAA; or Transport Canada Civil Aviation 

(TCCA); or MHI RJ Aviation ULC’s TCCA 

Design Approval Organization (DAO). If 

approved by the DAO, the approval must 

include the DAO-authorized signature. 

(i) Related Information 

(1) Refer to Mandatory Continuing 

Airworthiness Information (MCAI) TCCA AD 

CF–2021–19, issued May 13, 2021, for related 

information. This MCAI may be found in the 

AD docket on the internet at https://

www.regulations.gov by searching for and 

locating Docket No. FAA–2022–0155. 

(2) For more information about this AD, 

contact Thomas Niczky, Aerospace Engineer, 

Avionics and Electrical Systems Section, 

FAA, New York ACO Branch, 1600 Stewart 

Avenue, Suite 410, Westbury, NY 11590; 

telephone 516–228–7347; email 9-avs-nyacocos@faa.gov. 

(3) For service information identified in 

this AD, contact MHI RJ Aviation ULC, 12655 

Henri-Fabre Blvd., Mirabel, Que ́bec J7N 1E1 

Canada; Widebody Customer Response 

Center North America toll-free telephone +1– 

844–272–2720 or direct-dial telephone +1– 

514–855–8500; fax +1–514–855–8501; email 

thd.crj@mhirj.com; internet https://

mhirj.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. 

Issued on March 25, 2022. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2022–06771 Filed 3–31–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

Docket No. FAA–2022–0385; Project 

Identifier MCAI–2021–00786–E] 

RIN 2120–AA64 

Airworthiness Directives; GE Aviation 

Czech s.r.o. (Type Certificate 

Previously Held by WALTER Engines 

a.s., Walter a.s., and MOTORLET a.s.) 

Turboprop Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 


lotter on DSK11XQN23PROD with PROPOSALS1EP01AP22.003</GPH>

Figure 1 to paragraph (g) -AFM Revision 

Airplane Model AFMTitle AFM Revision/Date 

CL-600-2B 19 MHI RJ Model CL-600-2B 19 Revision 74, dated July 3, 

AFM, CSP A-012, Volume 1 2020 

CL-600-2C 10 Bombardier CRJ Series Revision 30, dated February 

and -2Cl 1 Regional Jet Model CL-600- 28,2020 

2C10 (Series 700, 701, 702) 

and CL-600-2Cl 1 (Series 

550) AFM, CSP B-012 

CL-600-2D 15 Bombardier CRJ Series Revision 24, dated March 27, 

and-2D24 Regional Jet Model CL-600- 2020 

2D24 (Series 900) and Model 

CL-600-2D 15 (Series 705) 

AFM, CSP C-012 

CL-600-2£25 Bombardier CRJ Series Revision 23, dated February 

Regional Jet Model CL-600- 14,2020 

2E25 (Series 1000) AFM, 

CSPD-012 
19030 Federal Register / Vol. 87, No. 63 / Friday, April 1, 2022 / Proposed Rules 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

certain GE Aviation Czech s.r.o. (GEAC) 

M601D–11, M601E–11, M601E–11A, 

M601E–11AS, M601E–11S, and M601F 

model turboprop engines. This 

proposed AD was prompted by the 

absence of life limits for propeller shaft 

part number (P/N) M601–6081.6 in the 

airworthiness limitation section of the 

applicable GEAC M601 Engine Shop 

Manual. This AD was also prompted by 

a report that operators may not have 

been provided with enough data to 

determine the accumulated life of 

certain propeller shafts. For M601F 

model turboprop engines, this proposed 

AD would require removal and 

replacement of the propeller shaft before 

the propeller shaft accumulates 12,000 

flight hours (FHs) since first installation 

on an engine, or before accumulating 

350 FHs after the effective date of this 

AD, whichever occurs later, with a part 

eligible for installation. For M601D–11, 

M601E–11, M601E–11A, M601E–11AS, 

and M601E–11S model turboprop 

engines, this proposed AD would 

require calculation of the accumulated 

life of the propeller shaft and, 

depending on the number of 

accumulated FHs removal and 

replacement of the propeller shaft with 

a part eligible for installation. 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 May 16, 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 GE Aviation Czech 

s.r.o., Beranovy ́ch 65, 199 02 Praha 9, 

Letnˇ any, Czech Republic; phone: +420 

222 538 111. 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. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2022–0385; 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: 

Barbara Caufield, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 

District Avenue, Burlington, MA 01803; 

phone: (781) 238–7146; email: 

barbara.caufield@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–2022–0385; Project Identifier 

MCAI–2021–00786–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 

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 Barbara Caufield, 

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 Union, has issued EASA AD 

2021–0154, dated July 1, 2021 (referred 

to after this as ‘‘the MCAI’’), to address 

the unsafe condition on these products. 

The MCAI states: 

It has been determined that the life limit 

for the propeller shaft P/N M601–6081.6 is 

not published in the applicable ALS for 

M601 engines. In addition, it has also been 

reported that some data, which can be used 

to determine the accumulated life of certain 

propeller shafts, may have not been provided 

to operators, so the propeller shaft life limit 

may not have been implemented correctly. 

These conditions, if not corrected, may 

lead to failure of a propeller shaft, possibly 

resulting in detachment of the propeller and 

consequent damage to the engine and/or the 

aircraft, and reduced control of the 

aeroplane. 

To address this potential unsafe condition, 

GEAC issued the original issue of the ASB, 

providing applicable instructions, and EASA 

issued AD 2021–0052 to require 

implementation of the applicable life limit 

and replacing each propeller shaft with a 

serviceable propeller shaft. 

Since that [EASA] AD was issued, 

additional data, which can be used to 

determine the accumulated life of certain 

propeller shafts, and to support an extended 

compliance time for Group 1 engines, has 

been made available; GEAC revised 

accordingly the ASB (now at revision 02). 

For the reasons described above, this 

[EASA] AD partially retains the requirements 

of EASA AD 2021–0052, which is 

superseded, introducing updated affected 

population and different compliance times. 

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–2022–0385. 

FAA’s Determination 

This product has been approved by 

the aviation authority of another 

country, and is approved for operation 

in the United States. Pursuant to the 

FAA’s bilateral agreement with the State 

of Design Authority, the FAA has been 

notified of the unsafe condition 

described in the EASA AD. The FAA is 

issuing this AD after determining that 

the unsafe condition described 

previously is likely to exist or develop 


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Federal Register / Vol. 87, No. 63 / Friday, April 1, 2022 / Proposed Rules 19031 

in other products of the same type 

design. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed GE Aviation Czech 

Alert Service Bulletin (ASB) ASB– 

M601F–72–10–00–0056 [02], ASB– 

M601D–72–10–00–0072 [02], ASB– 

M601E–72–10–00–0103 [02], and ASB– 

M601Z–72–10–00–0056 [02] (single 

document; formatted as service bulletin 

identifier [revision number]), dated May 

31, 2021. This ASB specifies procedures 

for calculating the accumulated life of 

certain propeller shafts. This ASB also 

specifies procedures for replacing 

certain propeller shafts. 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 

For M601F model turboprop engines, 

this proposed AD would require 

removal and replacement of the 

propeller shaft with a part eligible for 

installation before the propeller shaft 

accumulates 12,000 FHs since first 

installation on an engine, or before 

accumulating 350 FHs after the effective 

date of this AD, whichever occurs later. 

For M601D–11, M601E–11, M601E– 

11A, M601E–11AS, and M601E–11S 

model turboprop engines, this proposed 

AD would require calculation of the 

accumulated life of the propeller shaft 

and, depending on the number of 

accumulated FHs, removal and 

replacement of the propeller shaft with 

a part eligible for installation. 

Differences Between This Proposed AD 

and the MCAI 

EASA AD 2021–0154, dated July 1, 

2021, applies to M601D, M601D–1, 

M601D–2, M601D–11, M601D–11NZ, 

M601E, M601E–11, M601E–11A, 

M601E–11AS, M601E–11S, M601E–21, 

M601F, M601F–11, M601F–22, M601F– 

32, M601FS, M601T, and M601Z model 

turboprop engines. This AD does not 

include M601D, M601D–1, M601D–2, 

M601D–11NZ, M601E, M601E–21, 

M601F–11, M601F–22, M601F–32, 

M601FS, M601T, and M601Z model 

turboprop engines as these engine 

models are not type certificated in the 

United States. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 14 

engines installed on airplanes of U.S. 

registry. The FAA estimates that 7 

M601D–11, and 7 M601E–11 model 

turboprop engines installed on airplanes 

of U.S. registry would require 

calculation of the time since new (TSN) 

of the propeller shaft and removal and 

replacement of the propeller shaft. The 

FAA estimates that zero M601E–11A, 

M601E–11AS, M601E–11S, and M601F 

model turboprop engines installed on 

airplanes of U.S. registry would require 

replacement of the propeller shaft. 

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 

Calculate the total TSN of the propeller shaft .............. 1 work-hour × $85 per hour = $85 .. $0 $85 $1,190 

Remove and replace the propeller shaft ....................... 105 work-hours × $85 per hour = 

$8,925.

17,827 26,752 374,528 

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: 

GE Aviation Czech s.r.o. (Type Certificate 

previously held by WALTER Engines 

a.s., Walter a.s., and MOTORLET a.s.): 

Docket No. FAA–2022–0385; Project 

Identifier MCAI–2021–00786–E. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by May 16, 

2022. 

(b) Affected ADs 

None. 


lotter on DSK11XQN23PROD with PROPOSALS1
19032 Federal Register / Vol. 87, No. 63 / Friday, April 1, 2022 / Proposed Rules 

(c) Applicability 

This AD applies to: 

(1) GE Aviation Czech s.r.o. (GEAC) M601F 

model turboprop engines with an engine 

serial number (ESN) listed in Attachment 1, 

List of Affected Engines—Group 1, of GE 

Aviation Czech Alert Service Bulletin (ASB) 

ASB–M601F–72–10–00–0056 [02], ASB– 

M601D–72–10–00–0072 [02], ASB–M601E– 

72–10–00–0103 [02], and ASB–M601Z–72– 

10–00–0056 [02] (single document; formatted 

as service bulletin identifier [revision 

number]), dated May 31, 2021 (the ASB); 

(2) M601E–11 and M601E–11A model 

turboprop engines with an ESN listed in 

Attachment 2, List of Affected Parts—Group 

2, of the ASB; and 

(3) M601D–11, M601E–11AS, and M601E– 

11S model turboprop engines with propeller 

shaft P/N M601–6081.2 or P/N M601–6081.4. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7210, Turbine Engine Reduction Gear. 

(e) Unsafe Condition 

This AD was prompted by the absence of 

life limits for propeller shaft part number 

(P/N) M601–6081.6 in the airworthiness 

limitation section of the applicable GEAC 

M601 Engine Shop Manual. This AD was 

also prompted by a report that operators may 

not have been provided with enough data to 

determine the accumulated life of certain 

propeller shafts. The FAA is issuing this AD 

to prevent the failure of the propeller shaft. 

The unsafe condition, if not addressed, could 

result in damage to the engine, damage to the 

airplane, and reduced control of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) For affected M601F model turboprop 

engines, before the propeller shaft 

accumulates 12,000 flight hours (FHs) since 

first installation on an engine, or before 

accumulating 350 FHs after the effective date 

of this AD, whichever occurs later, remove 

the propeller shaft and replace with a part 

eligible for installation. 

(2) For affected M601D–11, M601E–11, 

M601E–11A, M601E–11AS, and M601E–11S 

model turboprop engines: 

(i) Within 100 FHs after the effective date 

of this AD, calculate the total time since new 

of the propeller shaft in accordance with the 

Accomplishment Instructions, paragraph 

2.2.1, of the ASB. 

(ii) Remove the propeller shaft prior to 

reaching its applicable life limit and replace 

with a part eligible for installation in 

accordance with the Accomplishment 

Instructions, paragraph 2.2.2., of the ASB. 

(h) Definitions 

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

eligible for installation’’ on M601F, M601E– 

11, and M601E–11A model turboprop 

engines is a propeller shaft identified in the 

Configuration Description, paragraph 1.5, 

Table 1, of the ASB, as applicable to the 

engine model, with a calculated life that has 

not exceeded the applicable life limit. 

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

eligible for installation’’ on M601D–11 model 

turboprop engines is a propeller shaft with 

P/N M601–6081.2, P/N M601–6081.4, or P/N 

M601–6081.5, with a calculated life that has 

not exceeded the applicable life limit. 

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

eligible for installation’’ on M601E–11AS and 

M601E–11S model turboprop engines is a 

propeller shaft with P/N M601–6081.2, P/N 

M601–6081.5, or P/N M601–6081.6, with a 

calculated life that has not exceeded the 

applicable life limit. 

(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 paragraph (j)(1) of this AD and 

email 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 Barbara Caufield, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 District 

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

238–7146; email: barbara.caufield@faa.gov. 

(2) Refer to European Union Aviation 

Safety Agency (EASA) AD 2021–0154, dated 

July 1, 2021, 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–2022– 

0385. 

(3) For service information identified in 

this AD, contact GE Aviation Czech s.r.o., 

Beranovy ́ch 65, 199 02 Praha 9, Letnˇ any, 

Czech Republic; phone: +420 222 538 111. 

You may view this reference information at 

the FAA, Airworthiness Products Section, 

1200 District Avenue, Burlington, MA 01803. 

For information on the availability of this 

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

Issued on March 25, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–06772 Filed 3–31–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2022–0388; Project 

Identifier MCAI–2020–01604–T] 

RIN 2120–AA64 

Airworthiness Directives; MHI RJ 

Aviation ULC (Type Certificate 

Previously Held by Bombardier, Inc.) 

Airplanes 

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 MHI RJ Aviation ULC Model 

CL–600–2C10 (Regional Jet Series 700, 

701 & 702), CL–600–2C11 (Regional Jet 

Series 550), CL–600–2D15 (Regional Jet 

Series 705), CL–600–2D24 (Regional Jet 

Series 900), and CL–600–2E25 (Regional 

Jet Series 1000) airplanes. This 

proposed AD was prompted by reports 

of the failure of certain primary ejector 

fuel feed flexible hoses, which may have 

a thinner liner than specified by design 

requirements, and are therefore more 

susceptible to cracking. This proposed 

AD would require replacing the hoses. 

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 May 16, 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 Bombardier service information 

identified in this NPRM, contact MHI RJ 

Aviation ULC, 12655 Henri-Fabre Blvd., 

Mirabel, Que ́bec J7N 1E1 Canada; 

Widebody Customer Response Center 

North America toll-free telephone +1– 

844–272–2720 or direct-dial telephone 

+1–514–855–8500; fax +1–514–855– 

8501; email thd.crj@mhirj.com; internet 

https://mhirj.com. You may view this 

service information at the FAA, 


lotter on DSK11XQN23PROD with PROPOSALS1