11178 Federal Register / Vol. 86, No. 35 / Wednesday, February 24, 2021 / Proposed Rules 

(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 De Havilland Aircraft of Canada 

Limited’s TCCA Design Approval 

Organization (DAO). If approved by the DAO, 

the approval must include the DAOauthorized signature. 

(j) Related Information 

(1) Refer to Mandatory Continuing 

Airworthiness Information (MCAI) Canadian 

AD CF–2020–28, dated August 14, 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–2021–0018. 

(2) For more information about this AD, 

contact Siddeeq Bacchus, Aerospace 

Engineer, Mechanical Systems and 

Administrative Services Section, FAA, New 

York ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; telephone 

516–228–7362; fax 516–794–5531; email 9- 

avs-nyaco-cos@faa.gov. 

(3) For service information identified in 

this AD, contact De Havilland Aircraft of 

Canada Limited, Q-Series Technical Help 

Desk, 123 Garratt Boulevard, Toronto, 

Ontario M3K 1Y5, Canada; telephone 416– 

375–4000; fax 416–375–4539; email thd@

dehavilland.com; internet https://

dehavilland.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 27, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–03597 Filed 2–23–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0019; Project 

Identifier MCAI–2020–01388–T] 

RIN 2120–AA64 

Airworthiness Directives; Airbus 

Canada Limited Partnership (Type 

Certificate Previously Held by C Series 

Aircraft Limited Partnership (CSALP); 

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 Airbus Canada Limited 

Partnership Model BD–500–1A10 and 

BD–500–1A11 airplanes. This proposed 

AD was prompted by reports of 

deficiencies in the primary flight control 

computer (PFCC) and remote electronics 

unit (REU) software. This proposed AD 

would require installation of a software 

update to correct deficiencies in the 

PFCC and REU software, as specified in 

a Transport Canada Civil Aviation 

(TCCA) AD, which is proposed for 

incorporation by reference. 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 April 12, 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 TCCA material that will be 

incorporated by reference (IBR) in this 

AD, contact Transport Canada National 

Aircraft Certification, 159 Cleopatra 

Drive, Nepean, Ontario, K1A 0N5 

CANADA; phone 888–663–3639; email 

AD-CN@tc.gc.ca; internet https://

tc.canada.ca/en/aviation. You may view 

this IBR material 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. 

It is also available in the AD docket on 

the internet at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2021– 

0019. 

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–2021– 

0019; 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. 

Comments will be available in the AD 

docket shortly after receipt. 

FOR FURTHER INFORMATION 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; 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–2021–0019; Project Identifier 

MCAI–2020–01388–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 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; 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. 


khammond on DSKJM1Z7X2PROD with PROPOSALS
Federal Register / Vol. 86, No. 35 / Wednesday, February 24, 2021 / Proposed Rules 11179 

Discussion 

TCCA, which is the aviation authority 

for Canada, has issued Canadian AD 

CF–2020–36, dated October 8, 2020 

(TCCA AD CF–2020–36) (also referred 

to as the Mandatory Continuing 

Airworthiness Information, or the 

MCAI), to correct an unsafe condition 

for certain Airbus Canada Limited 

Partnership Model BD–500–1A10 and 

BD–500–1A11 airplanes. 

This proposed AD was prompted by 

reports of deficiencies in the PFCC and 

REU software. The FAA is proposing 

this AD to address software deficiencies 

that, if not corrected, could impact flight 

control functions, which could prevent 

continued safe flight and landing. See 

the MCAI for additional background 

information. 

Related Service Information Under 1 

CFR Part 51 

TCCA AD CF–2020–36 describes 

procedures for installing updated PFCC 

and REU software; this installation 

includes pre-requisites that must be met 

prior to the installation (installing 

certain database versions and software). 

This material 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 and Requirements 

of This Proposed AD 

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 in other products of the same 

type design. 

Proposed AD Requirements 

This proposed AD would require 

accomplishing the actions specified in 

TCCA AD CF–2020–36, described 

previously, as incorporated by 

reference, except for any differences 

identified as exceptions in the 

regulatory text of this AD. 

Explanation of Required Compliance 

Information 

In the FAA’s ongoing efforts to 

improve the efficiency of the AD 

process, the FAA initially worked with 

Airbus and the European Aviation 

Safety Agency (EASA) to develop a 

process to use certain EASA ADs as the 

primary source of information for 

compliance with requirements for 

corresponding FAA ADs. The FAA has 

since coordinated with other 

manufacturers and civil aviation 

authorities (CAAs) to use this process. 

As a result, TCCA AD CF–2020–36 will 

be incorporated by reference in the FAA 

final rule. This proposed AD would, 

therefore, require compliance with 

TCCA AD CF–2020–36 in its entirety, 

through that incorporation, except for 

any differences identified as exceptions 

in the regulatory text of this proposed 

AD. Service information specified in 

TCCA AD CF–2020–36 that is required 

for compliance with TCCA AD CF– 

2020–36 will be available on the 

internet at https://www.regulations.gov 

by searching for and locating Docket No. 

FAA–2021–0019 after the FAA final 

rule is published. 

Costs of Compliance 

The FAA estimates that this proposed 

AD affects 38 airplanes of U.S. registry. 

The FAA estimates the following costs 

to comply with this proposed AD: 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Labor cost Parts cost Cost per product Cost on U.S. operators 

Up to 18 work-hours × $85 per hour = $1,530 ............... Up to $21,100 * .................. Up to $22,630 .................... Up to $859,940. 

* Parts cost to load the software in the REUs. 

According to the manufacturer, some 

or all of the costs of this proposed AD 

may be covered under warranty, thereby 

reducing the cost impact on affected 

individuals. The FAA does not control 

warranty coverage for affected 

individuals. As a result, the FAA has 

included all known costs in the cost 

estimate. 

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) Will not affect intrastate aviation 

in Alaska, and 

(3) Will 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. 


khammond on DSKJM1Z7X2PROD with PROPOSALS
11180 Federal Register / Vol. 86, No. 35 / Wednesday, February 24, 2021 / Proposed Rules 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive (AD): 

Airbus Canada Limited Partnership (Type 

Certificate Previously Held by C Series 

Aircraft Limited Partnership (CSALP); 

Bombardier, Inc.): Docket No. FAA– 

2021–0019; Project Identifier MCAI– 

2020–01388–T. 

(a) Comments Due Date 

The FAA must receive comments by April 

12, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Airbus Canada Limited 

Partnership Model BD–500–1A10 and BD– 

500–1A11 airplanes, certificated in any 

category, as identified in Canadian AD CF– 

2020–36, dated October 8, 2020 (TCCA AD 

CF–2020–36). 

(d) Subject 

Air Transport Association (ATA) of 

America Code 27, Flight control system. 

(e) Reason 

This AD was prompted by reports of 

deficiencies in the primary flight control 

computer (PFCC) and remote electronics unit 

(REU) software. The FAA is issuing this AD 

to address software deficiencies that, if not 

corrected, could impact flight control 

functions, which could prevent continued 

safe flight and landing. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Requirements 

Except as specified in paragraph (h) of this 

AD: Comply with all required actions and 

compliance times specified in, and in 

accordance with, TCCA AD CF–2020–36. The 

pre-requisites specified in the service 

information referenced in TCCA AD CF– 

2020–36 must be met prior to accomplishing 

the required actions. 

(h) Exception and Clarification of TCCA AD 

CF–2020–36 

(1) Where TCCA AD CF–2020–36 refers to 

its effective date, this AD requires using the 

effective date of this AD. 

(2) The compliance time for the actions 

required by paragraph (g) of this AD is the 

earliest of the times specified in paragraphs 

(h)(2)(i) through (iii) of this AD. 

(i) Prior to the accumulation of 12,000 total 

flight hours. 

(ii) Within 56 months after the effective 

date of this AD. 

(iii) Within 9,350 flight hours after the 

effective date 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 Airbus Canada Limited 

Partnership’s TCCA Design Approval 

Organization (DAO). If approved by the DAO, 

the approval must include the DAOauthorized signature. 

(j) Related Information 

(1) For TCCA AD CF–2020–36, contact 

Transport Canada National Aircraft 

Certification, 159 Cleopatra Drive, Nepean, 

Ontario, K1A 0N5 CANADA; phone 888– 

663–3639; email AD-CN@tc.gc.ca; internet 

https://tc.canada.ca/en/aviation. You may 

view this material 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. This 

material may be found in the AD docket on 

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

by searching for and locating Docket No. 

FAA–2021–0019. 

(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; fax 516–794–5531; 

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

Issued on January 28, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–03602 Filed 2–23–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0093; Project 

Identifier MCAI–2020–01213–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 BD–700–1A10 

and BD–700–1A11 airplanes. This 

proposed AD was prompted by reports 

indicating that the left- and right-hand 

elevator torque tube bearings were 

contaminated with sand and corrosion, 

restricting free rotation. This proposed 

AD would require repetitive general 

visual inspections of the left- and righthand elevator torque tube bearings for 

any sand, dust, or corrosion; repetitive 

functional tests of the elevator control 

system; and replacement of the elevator 

torque tube bearings if necessary. 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 April 12, 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–2021– 

0093; 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. 


khammond on DSKJM1Z7X2PROD with PROPOSALS