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, 


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Federal Register / Vol. 87, No. 63 / Friday, April 1, 2022 / Proposed Rules 19033 

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. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2022–0388; 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: 

Joseph Catanzaro, Aerospace Engineer, 

Airframe and Propulsion Section, FAA, 

New York ACO Branch, 1600 Stewart 

Avenue, Suite 410, Westbury, NY 

11590; telephone 516–228–7366; email 

9-avs-nyaco-cos@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–2022–0388; Project Identifier 

MCAI–2020–01604–T’’ 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 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 Joseph Catanzaro, 

Aerospace Engineer, Airframe and 

Propulsion Section, FAA, New York 

ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; 

telephone 516–228–7366; email 9-avsnyaco-cos@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 

Transport Canada Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued TCCA AD CF– 

2020–03, dated March 5, 2020 (TCCA 

AD CF–2020–03) (also referred to after 

this as the Mandatory Continuing 

Airworthiness Information, or the 

MCAI), to correct an unsafe condition 

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. You may 

examine the MCAI in the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2022–0388. 

This proposed AD was prompted by 

reports of the failure of primary ejector 

fuel feed flexible hoses with more than 

30,000 flight hours, installed in 

accordance with Bombardier Service 

Bulletin 670BA–28–008C, dated January 

23, 2003. In four of the events, the fuel 

was leaking inside the center fuel tank 

from the cracked inner liner of the hose, 

and caused a lateral fuel imbalance 

condition on the airplane. These events 

resulted in an emergency descent or air 

turn back (ATB). Subsequent 

investigation determined that hoses 

with part numbers (P/N) CC670–62022– 

3 and CC670–62022–4, and serial 

numbers 001 through 2470 inclusive, 

may have a thinner Teflon® liner than 

specified by the design requirements, 

and therefore are more susceptible to 

cracking. Analysis also indicates that, 

depending on the size of the crack and 

the resultant amount of fuel leakage, a 

fuel supply disruption to the engines 

could be significant enough to cause an 

inflight engine shutdown (IFSD). The 

FAA is proposing this AD to address a 

possible fuel hose leak, which could 

cause a lateral imbalance with an 

adverse effect on the airplane’s 

controllability, or could result in a dual 

IFSD. See the MCAI for additional 

background information. 

Related Service Information Under 1 

CFR Part 51 

Bombardier has issued Service 

Bulletin 670BA–28–040, dated 

September 30, 2019. This service 

information describes procedures for, 

among other actions, replacing any 

primary ejector fuel feed flexible hose, 

(P/N) CC670–62022–3 and CC670– 

62022–4, having serial numbers 001 

through 2470 inclusive. 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 the ADDRESSES section. 

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 MCAI and service 

information referenced above. The FAA 

is proposing this AD because the FAA 

evaluated all the relevant information 

and determined the unsafe condition 

described previously is likely to exist or 

develop on other products of the same 

type design. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require 

accomplishing the actions specified in 

the service information already 

described. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 457 

airplanes of U.S. registry. The FAA 

estimates the following costs to comply 

with this proposed AD: 


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19034 Federal Register / Vol. 87, No. 63 / Friday, April 1, 2022 / Proposed Rules 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

12 work-hours × $85 per hour = $1,020 ..................................................................................... $2,872 $3,892 $1,778,644 

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: 

MHI RJ Aviation ULC (Type Certificate 

Previously Held by Bombardier, Inc.): 

Docket No. FAA–2022–0388; Project 

Identifier MCAI–2020–01604–T. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by May 16, 

2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to MHI RJ Aviation ULC 

(Type Certificate Previously Held by 

Bombardier, Inc.) airplanes identified in 

paragraphs (c)(1) through (3) of this AD, 

certificated in any category. 

(1) Model CL–600–2C10 (Regional Jet 

Series 700, 701 & 702) and CL–600–2C11 

(Regional Jet Series 550) airplanes, serial 

numbers 10002 through 10325 inclusive. 

(2) Model CL–600–2D15 (Regional Jet 

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

Series 900) airplanes, serial numbers 15001 

through 15263 inclusive. 

(3) Model CL–600–2E25 (Regional Jet 

Series 1000), serial numbers 19001 through 

19013 inclusive. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 28, Fuel system. 

(e) Unsafe Condition 

This 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. The FAA is issuing this AD to 

address a possible fuel hose leak, which 

could cause a lateral imbalance with an 

adverse effect on the airplane’s 

controllability, or result in a dual inflight 

engine shutdown (IFSD). 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

At the applicable time specified in figure 

1 to paragraph (g) of this AD: Replace each 

hose having part number (P/N) CC670– 

62022–3 and P/N CC670–62022–4 and serial 

number 001 through 2470 inclusive, in 

accordance with Part B of the 

Accomplishment Instructions of Bombardier 

Service Bulletin 670BA–28–040, dated 

September 30, 2019. 

BILLING CODE 4910–13–P 


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(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 

responsible Flight Standards 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 responsible Flight 

Standards 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–2020–03, dated March 5, 2020, 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–2022–0388. 

(2) For more information about this AD, 

contact Joseph Catanzaro, Aerospace 

Engineer, Airframe and Propulsion Section, 

FAA, New York ACO Branch, 1600 Stewart 

Avenue, Suite 410, Westbury, NY 11590; 

telephone 516–228–7366; email 9-avs-nyacocos@faa.gov. 

(3) For Bombardier 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. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–06769 Filed 3–31–22; 8:45 am] 

BILLING CODE 4910–13–C 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

[Docket No. FAA–2022–0300; Airspace 

Docket No. 22–AAL–19] 

RIN 2120–AA66 

Proposed Revocation of Colored 

Federal Airway Blue 8 (B–8); 

Shishmaref, AK 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: This action proposes to 

revoke Colored Federal airway Blue 8 

(B–8) in the vicinity of Shishmaref, AK 

due to the pending decommissioning of 


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Figure 1 to paragraph (g) - Compliance Schedule 

Airplane Model Compliance Time 

CL-600-2Cl0 and CL-600-2Cl 1 airplanes, serial numbers 10005 Prior to the accumulation of 

through 10065 inclusive, that have accumulated less than 31,200 40,000 flight hours since SB 

flight hours since Bombardier Service Bulletin (SB) 670BA-28-008 670BA-28-008 was incorporated 

was incomorated 

CL-600-2Cl0 and CL-600-2Cl 1 airplanes, serial numbers 10005 Within 8,800 flight hours after 

through 10065 inclusive, that have accumulated 31,200 flight hours the effective date of this AD 

or more since SB 670BA-28-008 was incorporated 

CL-600-2Cl0 and CL-600-2Cl 1 airplanes, serial numbers 10002 Prior to the accumulation of 

through 10004 inclusive and 10066 through 10325 inclusive, that 40,000 total flight hours 

have accumulated less than 31,200 total flight hours as of the 

effective date of this AD 

CL-600-2Cl0 and CL-600-2Cl 1 airplanes, serial numbers 10002 Within 8,800 flight hours after 

through 10004 inclusive and 10066 through 10325 inclusive, that the effective date of this AD 

have accumulated 31,200 total flight hours or more as of the 

effective date of this AD 

CL-600-2D15 and CL-600-2D24 airplanes, serial numbers 15001 Prior to the accumulation of 

through 15263 inclusive, that have accumulated less than 31,200 40,000 total flight hours 

total flight hours as of the effective date of this AD 

CL-600-2D15 and CL-600-2D24 airplanes, serial numbers 15001 Within 8,800 flight hours after 

through 15263 inclusive, that have accumulated 31,200 total flight the effective date of this AD 

hours or more as of the effective date of this AD 

CL-600-2E25 airplanes, serial numbers 19001 through 19013 Prior to the accumulation of 

inclusive, that have accumulated less than 31,200 total flight hours 40,000 total flight hours 

as of the effective date of this AD 

CL-600-2E25 airplanes, serial numbers 19001 through 19013 Within 8,800 flight hours after 

inclusive, that have accumulated 31,200 total flight hours or more as the effective date of this AD 

of the effective date of this AD