This section of the FEDERAL REGISTER

contains notices to the public of the proposed

issuance of rules and regulations. The

purpose of these notices is to give interested

persons an opportunity to participate in the

rule making prior to the adoption of the final

rules.

Proposed Rules Federal Register

14551 

Vol. 86, No. 50 

Wednesday, March 17, 2021 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–1181; Project 

Identifier MCAI–2020–01368–T] 

RIN 2120–AA64 

Airworthiness Directives; 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 all 

Bombardier, Inc., Model CL–600–1A11 

(600), CL–600–2A12 (601), and CL–600– 

2B16 (601–3A, 601–3R and 604 

Variants) airplanes. This proposed AD 

was prompted by reports of corrosion on 

the passenger door internal structure of 

in-service airplanes. This proposed AD 

would require revising the existing 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive airworthiness limitations. 

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 3, 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 Bombardier, Inc., 

200 Coˆte-Vertu Road West, Dorval, 

Que ́bec H4S 2A3, Canada; North 

America toll-free telephone 1–866–538– 

1247 or direct-dial telephone 1–514– 

855–2999; email ac.yul@

aero.bombardier.com; internet http://

www.bombardier.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. 

Examining the AD Docket 

You may examine the AD docket on 

the internet at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

1181; 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: Aziz 

Ahmed, Aerospace Engineer, Airframe 

and Propulsion Section, FAA, New York 

ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; 

telephone 516–228–7329; fax 516–794– 

5531; 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–2020–1181; Project Identifier 

MCAI–2020–01368–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 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 Aziz Ahmed, 

Aerospace Engineer, Airframe and 

Propulsion Section, FAA, New York 

ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; 

telephone 516–228–7329; fax 516–794– 

5531; email 9-avs-nyaco-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. 

Discussion 

Transport Canada Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued Canadian AD 

CF–2016–37, dated November 25, 2016 

(also referred to after this as the 

Mandatory Continuing Airworthiness 

Information, or the MCAI), to correct an 

unsafe condition for all Bombardier, 

Inc., Model CL–600–1A11 (600), CL– 

600–2A12 (601), and CL–600–2B16 

(601–3A, 601–3R, and 604 Variants) 

airplanes. You may examine the MCAI 

in the AD docket on the internet at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–1181. 

This proposed AD was prompted 

reports of corrosion on the passenger 

door internal structure of in-service 

airplanes caused by an accumulation of 

moisture under the epoxy ramp. This 

proposed AD would require revising the 

existing maintenance or inspection 

program, as applicable, to incorporate 

new or more restrictive airworthiness 

limitations. The FAA is proposing this 


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14552 Federal Register / Vol. 86, No. 50 / Wednesday, March 17, 2021 / Proposed Rules 

AD to address corrosion on the 

passenger door internal structure and 

consequent loss of the structural 

integrity of the forward passenger door. 

See the MCAI for additional background 

information. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed the following 

Bombardier service information, which 

describes new or more restrictive 

airworthiness limitations for the upper 

latch pins of the forward passenger 

door. These documents are distinct 

since they apply to different airplane 

configurations. (Note: The asterisk (or 

‘‘one star’’) with the last three digits of 

the task number indicates that the task 

is an airworthiness limitation task.) 

• Task 53–10–01–101*, ‘‘Upper Latch 

Pins of the Passenger Door,’’ of 

Bombardier Challenger CL–600–1A11 

Time Limits/Maintenance Checks 

(TLMC), Product Support Publication 

(PSP) 605, Revision 39, dated January 8, 

2018. 

• Task 53–10–01–101*, ‘‘Upper Latch 

Pins of the Passenger Door,’’ of 

Bombardier Challenger CL–600–2A12 

TLMC, PSP 601–5, Revision 46, dated 

January 8, 2018. 

• Task 53–10–01–101*, ‘‘Upper Latch 

Pins of the Passenger Door,’’ of 

Bombardier Challenger CL–600–2B16 

TLMC, PSP 601A–5, Revision 42, dated 

January 8, 2018. 

• Task 53–20–00–188*, ‘‘Special 

Detailed Inspection of the Upper Latch 

Pins of the Passenger Door,’’ of 

Bombardier Challenger TLMC, CH 604 

TLMC, Revision 32, dated December 18, 

2019. 

• Task 53–20–00–188*, ‘‘Special 

Detailed Inspection of the Upper Latch 

Pins of the Passenger Door,’’ of 

Bombardier Challenger TLMC, CH 605 

TLMC, Revision 21, dated December 18, 

2019. 

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 Requirements of This NPRM 

This proposed AD would require 

revising the existing maintenance or 

inspection program, as applicable, to 

incorporate new or more restrictive 

airworthiness limitations. 

This proposed AD would require 

revisions to certain operator 

maintenance documents to include new 

actions (e.g., inspections). Compliance 

with these actions is required by 14 CFR 

91.403(c). For airplanes that have been 

previously modified, altered, or repaired 

in the areas addressed by this proposed 

AD, the operator may not be able to 

accomplish the actions described in the 

revisions. In this situation, to comply 

with 14 CFR 91.403(c), the operator 

must request approval for an alternative 

method of compliance according to 

paragraph (i)(1) of this proposed AD. 

Costs of Compliance 

The FAA estimates that this proposed 

AD affects 133 airplanes of U.S. registry. 

The FAA estimates the following costs 

to comply with this proposed AD: 

The FAA has determined that revising 

the maintenance or inspection program 

takes an average of 90 work-hours per 

operator, although the agency 

recognizes that this number may vary 

from operator to operator. Since 

operators incorporate maintenance or 

inspection program changes for their 

affected fleet(s), the FAA has 

determined that a per-operator estimate 

is more accurate than a per-airplane 

estimate. Therefore, the agency 

estimates the average total cost per 

operator to be $7,650 (90 work-hours × 

$85 per work-hour). 

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: 

Bombardier, Inc.: Docket No. FAA–2020– 

1181; Project Identifier MCAI–2020– 

01368–T. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) action by May 3, 

2021. 

(b) Affected Airworthiness Directives (ADs) 

None. 

(c) Applicability 

This AD applies to all Bombardier, Inc., 

Model CL–600–1A11 (600), CL–600–2A12 

(601), and CL–600–2B16 (601–3A, 601–3R, 

and 604 Variants) airplanes, certificated in 

any category. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 05, Time Limits/Maintenance 

Checks. 


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Federal Register / Vol. 86, No. 50 / Wednesday, March 17, 2021 / Proposed Rules 14553 

(e) Reason 

This AD was prompted by reports of 

corrosion on the passenger door internal 

structure of in-service airplanes. This AD was 

further prompted by a determination that 

new or more restrictive airworthiness 

limitations are necessary. The FAA is issuing 

this AD to address corrosion on the passenger 

door internal structure and consequent loss 

of the structural integrity of the forward 

passenger door. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Maintenance or Inspection Program 

Revision 

Within 30 days after the effective date of 

this AD: Revise the existing maintenance or 

inspection program, as applicable, to 

incorporate the information specified in the 

applicable time limits/maintenance checks 

(TLMC) revision specified in figure 1 to 

paragraph (g) of this AD. The initial 

compliance time for doing the tasks is at the 

time specified in the TLMC, or within 30 

days after the effective date of this AD, 

whichever occurs later. 

(h) No Alternative Actions or Intervals 

After the existing maintenance or 

inspection program has been revised as 

required by paragraph (g) of this AD, no 

alternative actions (e.g., inspections) or 

intervals may be used unless the actions or 

intervals, are approved as an alternative 

method of compliance (AMOC) in 

accordance with the procedures specified in 

paragraph (i)(1) of this AD. 

(i) 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; fax 516–794–5531. 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 Bombardier Inc.’s TCCA Design 

Approval Organization (DAO). If approved by 

the DAO, the approval must include the 

DAO-authorized signature. 

(j) Related Information 

(1) Refer to Mandatory Continuing 

Airworthiness Information (MCAI) Canadian 

AD CF–2016–37, dated November 25, 2016, 

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–2020–1181. 

(2) For more information about this AD, 

contact Aziz Ahmed, Aerospace Engineer, 

Airframe and Propulsion Section, FAA, New 

York ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; telephone 


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14554 Federal Register / Vol. 86, No. 50 / Wednesday, March 17, 2021 / Proposed Rules 

516–228–7329; fax 516–794–5531; email 

9-avs-nyaco-cos@faa.gov. 

(3) For service information identified in 

this AD, contact Bombardier, Inc., 200 CoˆteVertu Road West, Dorval, Que ́bec H4S 2A3, 

Canada; North America toll-free telephone 

1–866–538–1247 or direct-dial telephone 

1–514–855–2999; email ac.yul@

aero.bombardier.com; internet http://

www.bombardier.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 January 20, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–01745 Filed 3–16–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0223; Project 

Identifier AD–2020–00539–A] 

RIN 2120–AA64 

Airworthiness Directives; Mooney 

International Corporation Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Proposed rule; correction. 

SUMMARY: The FAA is correcting a 

notice of proposed rulemaking (NPRM) 

that published in the Federal Register. 

The NPRM proposed to issue an 

airworthiness directive (AD) that would 

apply to certain Mooney International 

Corporation (Mooney) Model M20V 

airplanes. As published, the docket 

number referenced throughout is 

incorrect. This document corrects that 

error. In all other respects, the original 

document remains the same; however, 

for clarity, the FAA is publishing the 

entire proposed rule in the Federal 

Register. 

DATES: The last date for submitting 

comments on the NPRM (86 FR 13502, 

March 9, 2021) remains April 23, 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 

the NPRM, contact Mooney 

International Corporation, 165 Al 

Mooney Road, North Kerrville, TX 

78028; phone: (800) 456–3033; email: 

support@mooney.com. You may view 

this service information at the FAA, 

Airworthiness Products Section, 

Operational Safety Branch, 901 Locust, 

Kansas City, MO 64106. For information 

on the availability of this material at the 

FAA, call (816) 329–4148. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0223; or in person at Docket 

Operations between 9 a.m. and 5 p.m., 

Monday through Friday, except Federal 

holidays. The AD docket contains the 

NPRM, any comments received, and 

other information. The street address for 

Docket Operations is listed above. 

FOR FURTHER INFORMATION CONTACT: 

Jacob Fitch, Aviation Safety Engineer, 

Fort Worth ACO Branch, FAA, 10101 

Hillwood Pkwy, Fort Worth, TX 76177; 

phone: (817) 222–4130; fax: (817) 222– 

5245; email: jacob.fitch@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–2021–0223; Project Identifier AD– 

2020–00539–A’’ 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 the 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 the 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 the 

NPRM. Submissions containing CBI 

should be sent to Jacob Fitch, Aviation 

Safety Engineer, Fort Worth ACO 

Branch, FAA, 10101 Hillwood Pkwy, 

Fort Worth, TX 76177. 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 published an NPRM (86 FR 

13502, March 9, 2021) that would apply 

to certain serial-numbered Mooney 

Model M20V airplanes. The NPRM 

proposed to require inspecting the 

alternator main power cable and the 

exhaust crossover tube and modifying 

the alternator main power cable routing 

by installing an additional alternator 

cable clamp, part number 

MS21919WCJ6. The NPRM was 

prompted by reports of short circuit and 

arcing of the alternator main power 

cable in the engine compartment. This 

condition, if unaddressed, could result 

in a fire hazard, loss of engine thrust 

control, and reduced control of the 

airplane. 

Need for the Correction 

As published, the docket number 

referenced throughout the NPRM is 

incorrect. The NPRM incorrectly 

references ‘‘Docket No. FAA–2020– 

0991’’ instead of ‘‘Docket No. FAA– 

2021–0223.’’ 

Although no other part of the 

preamble or regulatory information has 

been corrected, for clarity, the FAA is 

publishing the entire proposed rule in 

the Federal Register. 

The comment due date of the NPRM 

remains April 23, 2021. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Mooney 

International Corporation Service 

Bulletin M20–340C, dated February 14, 

2020 (SB M20–340C). The service 

information specifies inspecting the 


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