38212 Federal Register / Vol. 86, No. 136 / Tuesday, July 20, 2021 / Rules and Regulations 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0339; Project 

Identifier MCAI–2020–01605–T; Amendment 

39–21636; AD 2021–14–09] 

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: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Airbus Canada Limited Partnership 

Model BD–500–1A10 and BD–500– 

1A11 airplanes. This AD was prompted 

by a design review that identified rib 0 

of the center wing box (CWB) as an area 

where a single failure of a clamshell 

type refuel/defuel line coupling could 

lead to the accumulation of dangerous 

levels of electrostatic charges within the 

fuel tank. This AD requires replacing 

the clamshell type refuel/defuel line 

coupling in the CWB at rib 0 with a 

threaded type fuel coupling, and 

installing an additional support bracket 

and clamp in the CWB at rib 0, as 

specified in a Transport Canada Civil 

Aviation (TCCA) AD, which is 

incorporated by reference. The FAA is 

issuing this AD to address the unsafe 

condition on these products. 

DATES: This AD is effective August 24, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of August 24, 2021. 

ADDRESSES: For material incorporated 

by reference (IBR) in this AD, contact 

TCCA, Transport Canada National 

Aircraft Certification, 159 Cleopatra 

Drive, Nepean, Ontario K1A 0N5, 

Canada; telephone 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– 

0339. 

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– 

0339; 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 final rule, 

any comments received, and other 

information. The address for Docket 

Operations is U.S. Department of 

Transportation, Docket Operations, 

M–30, West Building Ground Floor, 

Room W12–140, 1200 New Jersey 

Avenue SE, Washington, DC 20590. 

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; fax 

516–794–5531; email 9-avs-nyaco-cos@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The TCCA, which is the aviation 

authority for Canada, has issued TCCA 

AD CF–2020–04, dated March 9, 2020 

(TCCA AD CF–2020–04) (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. 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to certain Airbus Canada Limited 

Partnership Model BD–500–1A10 and 

BD–500–1A11 airplanes. The NPRM 

published in the Federal Register on 

April 26, 2021 (86 FR 21967). The 

NPRM was prompted by a design review 

that identified rib 0 of the CWB as an 

area where a single failure of a 

clamshell type refuel/defuel line 

coupling could potentially lead to the 

accumulation of dangerous levels of 

electrostatic charges within the fuel 

tank. The NPRM proposed to require 

replacing the clamshell type refuel/ 

defuel line coupling in the CWB at rib 

0 with a threaded type fuel coupling, 

and installing an additional support 

bracket and clamp in the CWB at rib 0, 

as specified in TCCA AD CF–2020–04. 

The FAA is issuing this AD to address 

failure of a clamshell type refuel/defuel 

line coupling, which could lead to fuel 

tank ignition. See the MCAI for 

additional background information. 

Comments 

The FAA gave the public the 

opportunity to participate in developing 

this final rule. The FAA has considered 

the comment received. The Air Line 

Pilots Association, International (ALPA) 

stated its support for the NPRM. 

Conclusion 

The FAA reviewed the relevant data, 

considered the comment received, and 

determined that air safety and the 

public interest require adopting this 

final rule as proposed, except for minor 

editorial changes. The FAA has 

determined that these minor changes: 

• Are consistent with the intent that 

was proposed in the NPRM for 

addressing the unsafe condition; and 

• Do not add any additional burden 

upon the public than was already 

proposed in the NPRM. 

Related Service Information Under 1 

CFR Part 51 

TCCA AD CF–2020–04 describes 

procedures for replacing the clamshell 

type refuel/defuel line coupling in the 

CWB at rib 0 with a threaded type fuel 

coupling, and installing an additional 

support bracket and clamp in the CWB 

at rib 0. 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. 

Costs of Compliance 

The FAA estimates that this AD 

affects 47 airplanes of U.S. registry. The 

FAA estimates the following costs to 

comply with this AD: 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

27 work-hours × $85 per hour = $2,295 ..................................................................................... $7,191 $9,486 $445,842 


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Federal Register / Vol. 86, No. 136 / Tuesday, July 20, 2021 / Rules and Regulations 38213 

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 

This AD will not have federalism 

implications under Executive Order 

13132. This AD will not have a 

substantial direct effect on the States, on 

the relationship between the national 

government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify that this AD: 

(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. 

Adoption of the Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 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: 

2021–14–09 Airbus Canada Limited 

Partnership (Type Certificate Previously 

Held by C Series Aircraft Limited 

Partnership (CSALP); Bombardier, Inc.): 

Amendment 39–21636; Docket No. 

FAA–2021–0339; Project Identifier 

MCAI–2020–01605–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective August 24, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Airbus Canada Limited 

Partnership (type certificate previously held 

by C Series Aircraft Limited Partnership 

(CSALP); Bombardier, Inc.) Model BD–500– 

1A10 and BD–500–1A11 airplanes, 

certificated in any category, as identified in 

Transport Canada Civil Aviation (TCCA) AD 

CF–2020–04, dated March 9, 2020 (TCCA AD 

CF–2020–04). 

(d) Subject 

Air Transport Association (ATA) of 

America Code 28, Fuel. 

(e) Reason 

This AD was prompted by a design review 

that identified rib 0 of the center wing box 

(CWB) as an area where a single failure of a 

clamshell type refuel/defuel line coupling 

could lead to the accumulation of dangerous 

levels of electrostatic charges within the fuel 

tank. The FAA is issuing this AD to address 

failure of a clamshell type refuel/defuel line 

coupling, which could lead to fuel tank 

ignition. 

(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–2020–04. 

(h) Exceptions to TCCA AD CF–2020–04 

(1) Where TCCA AD CF–2020–04 refers to 

its effective date, this AD requires using the 

effective date of this AD. 

(2) Where TCCA AD CF–2020–04 refers to 

hours air time, this AD requires using flight 

hours. 

(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 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 TCCA; or Airbus Canada’s TCCA 

Design Approval Organization (DAO). If 

approved by the DAO, the approval must 

include the DAO-authorized signature. 

(j) Related Information 

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; fax 516–794–5531; 

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

(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless this AD specifies otherwise. 

(i) Transport Canada Civil Aviation (TCCA) 

AD CF–2020–04, dated March 9, 2020. 

(ii) [Reserved] 

(3) For TCCA AD CF–2020–04, contact 

TCCA, Transport Canada National Aircraft 

Certification, 159 Cleopatra Drive, Nepean, 

Ontario K1A 0N5, Canada; telephone 888– 

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

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

(4) 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–2021–0339. 

(5) You may view this material that is 

incorporated by reference at the National 

Archives and Records Administration 

(NARA). For information on the availability 

of this material at NARA, email fedreg.legal@

nara.gov, or go to: https://www.archives.gov/ 

federal-register/cfr/ibr-locations.html. 

Issued on June 25, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–15351 Filed 7–19–21; 8:45 am] 

BILLING CODE 4910–13–P 


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