Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Rules and Regulations 93157 

referred to in Boeing Alert Requirements 

Bulletin B787–81205–SB320048–00 RB, Issue 

001, dated November 20, 2023. 

(h) Exceptions to Service Information

Specifications

Where the Compliance Time column of the 

table in the ‘‘Compliance’’ paragraph of 

Boeing Alert Requirements Bulletin B787– 

81205–SB320048–00 RB, Issue 001, dated 

November 20, 2023, refers to the Issue 001 

date of Requirements Bulletin B787–81205– 

SB320048–00 RB, this AD requires using the 

effective date of this AD. 

(i) Parts Installation Prohibition

As of the effective date of this AD, no

person may install a drag brace lower lock 

link assembly, part number 513Z2010–501 

and serial number 19ZHQ00772, 

19ZHQ00773, 19ZHQ00890, or 19ZHQ00891, 

on any airplane. 

(j) Alternative Methods of Compliance

(AMOCs)

(1) The Manager, AIR–520, Continued

Operational Safety 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 the attention of the person 

identified in paragraph (k)(1) of this AD. 

Information may be emailed to: AMOC@

faa.gov. 

(2) Before using any approved AMOC,

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the responsible Flight Standards Office. 

(3) An AMOC that provides an acceptable

level of safety may be used for any repair, 

modification, or alteration required by this 

AD if it is approved by The Boeing Company 

Organization Designation Authorization that 

has been authorized by the Manager, AIR– 

520, Continued Operational Safety Branch, 

FAA, to make those findings. To be 

approved, the repair method, modification 

deviation, or alteration deviation must meet 

the certification basis of the airplane, and the 

approval must specifically refer to this AD. 

(k) Related Information

(1) For more information about this AD,

contact Joseph Hodgin, Aviation Safety 

Engineer, FAA, 2200 South 216th St., Des 

Moines, WA 98198; phone: 206–231–3962; 

email: joseph.j.hodgin@faa.gov. 

(2) Material identified in this AD that is not

incorporated by reference is available at the 

address specified in paragraph (l)(3) of this 

AD. 

(l) Material Incorporated by Reference

(1) The Director of the Federal Register

approved the incorporation by reference 

(IBR) of the material listed in this paragraph 

under 5 U.S.C. 552(a) and 1 CFR part 51. 

(2) You must use this material as

applicable to do the actions required by this 

AD, unless the AD specifies otherwise. 

(i) Boeing Alert Requirements Bulletin

B787–81205–SB320048–00 RB, Issue 001, 

dated November 20, 2023. 

(ii) [Reserved]

(3) For the material identified in this AD,

contact Boeing Commercial Airplanes, 

Attention: Contractual & Data Services 

(C&DS), 2600 Westminster Blvd., MC 110– 

SK57, Seal Beach, CA 90740–5600; telephone 

562–797–1717; website myboeingfleet.com. 

(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. 

(5) You may view this material at the

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

visit www.archives.gov/federal-register/cfr/ 

ibr-locationsoremailfr.inspection@nara.gov. 

Issued on October 24, 2024. 

Peter A. White, 

Deputy Director, Integrated Certificate 

Management Division, Aircraft Certification 

Service. 

[FR Doc. 2024–27596 Filed 11–25–24; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–1285; Project 

Identifier MCAI–2023–01146–T; Amendment 

39–22872; AD 2024–22–01] 

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 superseding 

Airworthiness Directive (AD) 2023–05– 

08, which applied to certain Airbus 

Canada Limited Partnership Model BD– 

500–1A10 and BD–500–1A11 airplanes. 

AD 2023–05–08 required revising the 

existing maintenance or inspection 

program, as applicable, to incorporate 

new or more restrictive airworthiness 

limitations. This AD was prompted by 

a determination that new or more 

restrictive airworthiness limitations are 

necessary. This AD continues to require 

certain actions in AD 2023–05–08 and 

requires revising the existing 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive airworthiness limitations, as 

specified in a Transport Canada 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 December 

31, 2024. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of December 31, 2024. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain other publication listed in 

this AD as of May 12, 2023 (88 FR 

20751, April 7, 2023). 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain other publication listed in 

this AD as of March 30, 2021 (86 FR 

10799, February 23, 2021). 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2024–1285; 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, the mandatory 

continuing airworthiness information 

(MCAI), 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. 

Material Incorporated by Reference: 

• For Transport Canada material

identified in this AD, contact Transport 

Canada, Transport Canada National 

Aircraft Certification, 159 Cleopatra 

Drive, Nepean, Ontario K1A 0N5, 

Canada; telephone 888–663–3639; email 

TC.AirworthinessDirectives-Consignes

denavigabilite.TC@tc.gc.ca. You may 

find this material on the Transport 

Canada website at tc.canada.ca/en/ 

aviation. 

• For Airbus Canada Limited

Partnership material identified in this 

AD, contact Airbus Canada Limited 

Partnership, 13100 Henri-Fabre 

Boulevard, Mirabel, Que ́bec J7N 3C6, 

Canada; telephone 450–476–7676; email 

a220_crc@abc.airbus; website 

a220world.airbus.com. 

• 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. 

It is also available at regulations.gov 

under Docket No. FAA–2024–1285.≤ 

FOR FURTHER INFORMATION CONTACT: 

Gabriel D. Kim, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; 

telephone 516–228–7343; email 9-avsnyaco-cos@faa.gov. 

SUPPLEMENTARY INFORMATION: 


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93158 Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Rules and Regulations 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to supersede AD 2023–05–08, 

Amendment 39–22377 (88 FR 20751, 

April 7, 2023) (AD 2023–05–08). AD 

2023–05–08 applied to certain Airbus 

Canada Limited Partnership Model BD– 

500–1A10 and BD–500–1A11 airplanes. 

AD 2023–05–08 required revising the 

existing maintenance or inspection 

program, as applicable, to incorporate 

new or more restrictive airworthiness 

limitations. The FAA issued AD 2023– 

05–08 to address reduced structural 

integrity of the airplane or reduced 

controllability of the airplane. 

The NPRM published in the Federal 

Register on April 29, 2024 (89 FR 

33300). The NPRM was prompted by 

AD CF–2023–69, dated October 5, 2023, 

issued by Transport Canada, which is 

the aviation authority for Canada 

(Transport Canada AD CF–2023–69) 

(also referred to as the MCAI). 

In the NPRM, the FAA proposed to 

continue to require certain actions in 

AD 2023–05–08 and require revising the 

existing maintenance or inspection 

program, as applicable, to incorporate 

new or more restrictive airworthiness 

limitations. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2024–1285. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received comments from Air 

Line Pilots Association, International 

(ALPA), who supported the NPRM 

without change. 

The FAA received additional 

comments from Delta Air Lines (Delta). 

The following presents the comments 

received on the NPRM and the FAA’s 

response to each comment. 

Request To Incorporate by Reference 

the MCAI 

Delta requested that the FAA update 

the language in the proposed AD to 

mandate Transport Canada AD CF– 

2023–69 via incorporation by reference 

(IBR) instead of mandating Airbus 

Canada Limited Partnership A220 

Airworthiness Limitations, BD500– 

3AB48–11400–02, Issue 017.01, dated 

August 17, 2023, by IBR. Delta stated 

this would allow operators to 

incorporate the following language: 

‘‘The use of superseding Interim 

Revisions or later revisions of the AWL 

Publication, approved by TC, is 

acceptable for compliance [. . .]’’ in 

Transport Canada AD CF–2023–69. 

Delta noted that transitioning to IBR of 

the Transport Canada AD versus the IBR 

of a specific manufacturer airworthiness 

limitation (AWL) revision is necessary 

as AWL Issue 017.02 has already been 

published and AWL Issue 018.00 is 

estimated to be released later in 2024. 

Delta noted it could be at risk of 

grounding its fleet while waiting for an 

alternative method of compliance 

(AMOC) to allow incorporating more up 

to date AWL revisions. 

The FAA agrees to mandate Transport 

Canada AD CF–2023–69 via IBR in this 

AD for the reasons provided by the 

commenter. Incorporating by reference 

the MCAI instead of the service 

information does not change the 

required action to incorporate Airbus 

Canada Limited Partnership A220 

Airworthiness Limitations, BD500– 

3AB48–11400–02, Issue 017.01, dated 

August 17, 2023, into their maintenance 

or inspection program. Instead 

incorporating by reference of the MCAI 

relieves the burden of applying for 

AMOCs to use later approved revisions 

of the service information. By 

mandating Transport Canada AD CF– 

2023–69 via IBR, operators are allowed 

to use applicable later AWL revisions to 

comply with the requirements of this 

AD. Transport Canada AD CF–2023–69 

includes paragraph C., which accepts 

the use of later revisions, approved by 

Transport Canada, of the referenced 

AWL document for compliance. The 

FAA concurs this change will minimize 

any disruption to an operator’s existing 

maintenance or inspection program due 

to any potential delays in an AMOC 

approval. 

The FAA has revised paragraph (k) of 

this AD to incorporate by reference 

Transport Canada AD CF–2023–69 and 

added paragraph (l) to this AD to specify 

exceptions to Transport Canada AD CF– 

2023–69. The exceptions in paragraph 

(l) of this AD are standard for ADs that 

incorporate MCAI by reference. 

The FAA has also revised paragraph 

(m) of this AD (paragraph (l) of the 

proposed AD) to refer to Transport 

Canada AD CF–2023–69. 

Although Delta indicated that all of 

Airbus Canada Limited Partnership 

A220 Airworthiness Limitations, 

BD500–3AB48–11400–02, Issue 017.01, 

dated August 17, 2023, should be 

mandated via the IBR of Transport 

Canada AD CF–2023–69, the FAA has 

still excluded Section 03, ‘‘Candidate 

CMR Limitations—General.’’ Paragraph 

(g) of this AD is for the CCMRs and 

paragraph (k) of this AD incorporates all 

AWLs except for CCMRs, as specified in 

the paragraph (l)(3) of this AD. 

Request To Allow AMOCs 

Delta requested that the FAA add a 

paragraph to allow the use of AMOCs 

approved for AD 2023–05–08 as AMOCs 

to the proposed AD paragraphs that 

require revising the existing 

maintenance or inspection program. 

Delta stated it has received many 

AMOCs for AD 2023–05–08, including 

one that approves the use of A220 AWL 

Issue 017.02, or later revisions approved 

by Transport Canada or Airbus Canada 

Limited Partnership’s Transport Canada 

Design Approval Organization (DAO), 

except for the use of candidate 

certification maintenance requirements 

(CCMRs). Delta noted that the CCMRs in 

Table 2 of Airbus Canada Limited 

Partnership A220 Airworthiness 

Limitations, BD500–3AB48–11400–02, 

Issue 011.00, dated June 18, 2020, are 

still mandatory for airplanes with an 

original certificate of airworthiness 

issued on or before June 18, 2020. Delta 

concluded that the extension of these 

AMOCs to the proposed AD would 

allow Delta to continue to use the latest 

AWL revision and not be responsible for 

requesting/receiving an AMOC between 

the AD’s publication date and the AD’s 

effective date, preventing the grounding 

of its fleet. 

The FAA agrees that previous AMOCs 

are acceptable for certain paragraphs in 

this AD. The FAA has added paragraph 

(n)(1)(ii) to this AD to allow AMOCs 

approved previously for AD 2023–05–08 

as AMOCs for the corresponding 

provisions of paragraphs (g) and (i) of 

this AD. The FAA has also added 

paragraph (n)(1)(iii) to this AD to allow 

AMOCs approved previously for AD 

2023–05–08 as AMOCs for the 

corresponding provisions of paragraph 

(k) of this AD, except for AMOCs that 

allow the use of revisions earlier than 

Airbus Canada Limited Partnership 

A220 Airworthiness Limitations, 

BD500–3AB48–11400–02, Issue 017.01, 

dated August 17, 2023. 

Request To Remove the Requirement 

Mandating CCMRs 

Delta requested that the FAA remove 

the requirement mandating the CCMR 

section of the AWL document. Delta 

noted that new airplanes are required by 

the CFR to have the corresponding AWL 

revision incorporated into their 

maintenance program. Delta stated the 

A220 AWL revisions have a CCMR 

section and thus are required to be 

incorporated into its maintenance 

program. Delta pointed out that the FAA 

has stated CCMR sections should not be 

mandated by the FAA (as specified in 

the FAA’s response to comments to the 

NPRM for AD 2023–05–08). Delta 


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Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Rules and Regulations 93159 

concluded their maintenance program is 

split as follows: 

• Newly delivered airplanes: not 

affected by an AD, CCMRs are required. 

• Airplanes delivered after AWL 

Issue 011.00: CCMR are not required per 

ADs or CFR. 

• Airplanes delivered before AWL 

Issue 011.00: CCMRs are required per 

ADs. 

The FAA agrees to clarify. In AD 

2023–05–08, the FAA explained that 

equivalent airplane maintenance 

manual (AMM) tasks may be mandated 

in lieu of CCMRs in future rulemaking. 

The FAA also explained that CCMRs 

that were previously mandated can 

continue to be mandated. This AD only 

mandates the previously mandated 

CCMRs from AD 2021–04–05, 

Amendment 39–21426 (86 FR 10799, 

February 23, 2021), as specified in the 

retained requirements of paragraph (g) 

of this AD. For this AD, there are no 

new CCMRs. For future rulemaking 

where the MCAI includes new CCMRs, 

the FAA will mandate equivalent AMM 

tasks in lieu of the CCMRs. 

Regarding Delta’s comment that their 

maintenance program is split, the FAA 

notes that, for Model BD–500–1A10 and 

BD–500–1A11 airplanes, the CCMRs are 

mandated either by an AD action or the 

CFR as follows: 

• Newly delivered airplanes with an 

original airworthiness certificate or 

original export certificate of 

airworthiness issued after August 17, 

2023: These airplanes are not affected 

by this AD. However, complying with 

the airworthiness limitations specified 

as part of the approved type design and 

referenced on the type certificate data 

sheet is required per the CFR (14 CFR 

91.403(c)). These airplanes were 

certified with AWL documents that 

include CCMRs. 

• Airplanes delivered after AWL 

Issue 011.00 (airplane with an original 

airworthiness certificate or original 

export certificate of airworthiness 

issued after June 18, 2020, but on or 

before August 17, 2023): These airplanes 

are affected by this AD. This AD does 

not require incorporating CCMRs for 

these airplanes but the CCMRs in the 

AWL delivered with the airplane are 

required by the CFR. These airplanes 

must comply with the airworthiness 

limitations specified as part of the 

approved type design and referenced on 

the type certificate data sheet; these 

airplanes were certified with AWL Issue 

011.00 (or later issues). Those AWL 

issues include the CCMRs that operators 

must comply with. 

• Airplanes delivered before AWL 

Issue 011.00 (airplanes with an original 

airworthiness certificate or original 

export certificate of airworthiness 

issued on or before June 18, 2020) are 

affected by this AD, which requires the 

CCMRs. 

The FAA has not changed this AD 

regarding this issue. 

Request To Add Exception Paragraph 

Delta requested that the FAA add an 

exception paragraph to the proposed AD 

to allow FAA operators to omit the 

10,000-flight hour life limit for the fuel 

pump cartridge. In addition, Delta 

requested that Airbus Canada’s latest 

petition (submitted Dec. 2023) to update 

Exemption 16779A be approved. Delta 

noted that the FAA has published 

Docket No.: FAA–2016–4198; Summary 

Notice No. 2024–18, which summarizes 

the petition to request relief from the 

10,000-flight hour life limit for the fuel 

pump cartridge. 

Delta stated that in Airbus Canada 

Limited Partnership A220 

Airworthiness Limitations, BD500– 

3AB48–11400–02, Issue 017.00, Airbus 

Canada removed, for European Union 

Aviation Safety Agency (EASA) and 

Transport Canada operators, the 13,000 

flight hour life limit for all fuel boost 

pump cartridges with manufacturer part 

number (MPN) 9C208–3 except for ‘‘SN 

AAM4613 to AAM4622; AAF8325; 

AAF8326; AAJ6639; AAK5612; 

AAL6169; AAL6170; AAL6173; 

AAL6174 (PRE SB 9C208–3–28–001)’’. 

Delta stated that Airbus Canada was not 

able to remove the 10,000-flight hour 

life limit for FAA operators as FAA 

Exemption 16779A still requires it. 

Delta explained that these fuel boost 

pump cartridges, MPN 9C208–3, cost 

approximately $85,000/pump, and there 

are two pumps per airplane. In addition, 

Delta explained that it takes 

approximately 3 years to reach the 

10,000-flight hour life limit. At its 

present fleet size, Delta estimated that it 

must spend a minimum of $11.7 million 

every 3 years to replace the fuel boost 

pump cartridges and once its fleet is 

fully delivered, it will spend 

approximately $24.6 million every 3 

years. Delta concluded that it is 

unreasonable to force FAA operators to 

be burdened with additional costs of 

compliance over that of other operators 

who are operating under Airbus Canada 

Limited Partnership A220 

Airworthiness Limitations, BD500– 

3AB48–11400–02, Issue No. 017.00. 

Delta proposed that the FAA include 

the following exception to paragraph (l) 

of the proposed AD: ‘‘Where TCCA AD 

CF–2023–69 paragraph A. requires 

incorporation of the AWL, this AD does 

not require a 10,000 FH life limit on Part 

Number 9C208–3 (Cartridge, boost 

pump) unless it falls within the 

effectivity definition in Parker SB 

9C208–3–28–001.’’ 

Delta requested that if the FAA does 

not agree to add an exception as stated 

above, then the Costs of Compliance 

section of the NPRM be updated to 

include these exceptional material costs. 

The FAA does not agree with the 

commenter’s requests. The FAA cannot 

grant or deny petitions for exemptions 

within an AD as that process is outside 

the scope of this AD action. In addition, 

the FAA has determined that this AD 

cannot include relief from the fuel boost 

pump cartridge life limits in an AD in 

regards to the petition for relief from 

FAA Exemption 16779A. 

Regarding the costs, the FAA does not 

agree to revise the Cost of Compliance 

section of this AD to include the cost of 

accomplishing repetitive replacements. 

The FAA recognizes such costs are part 

of complying with airworthiness 

limitations, but the costs of 

accomplishing maintenance actions 

specified in airworthiness limitations 

are not directly required by this AD. 

Instead, this AD requires operators to 

revise their existing maintenance or 

inspection program, as applicable, to 

incorporate the new airworthiness 

limitations. Compliance with any 

airworthiness limitation is required by 

14 CFR 91.403(c). Therefore, 

compliance with the airworthiness 

limitations is not a requirement of this 

AD, and including the cost of a 

replacement part would be 

inappropriate. The FAA has not 

changed this AD regarding this issue. 

Request To Clarify AMOC Process 

Delta requested clarification if an 

AMOC to deviate from the proposed AD 

(once published as a final rule) will be 

needed or if U.S. operators will be able 

to deviate from the life limit for certain 

fuel boost pump cartridges once the 

petition to exemption 16779A is 

published. Delta stated it believes this 

exemption will allow Airbus Canada to 

remove the life limit from the AWL at 

the next revision. Delta stated it may 

need to continue to comply with the 

specific AWL revision until the next 

AWL revision is published and the FAA 

has provided approval to use the latest 

AWL. Delta concluded that due to the 

significant operational and financial 

impacts, Delta would like to introduce 

this relief as soon as possible. 

The FAA agrees to clarify. Once the 

petition to the exemption 16779A is 

approved and published, operators may 

request an AMOC to this AD, under the 

provisions of paragraph (n)(1) of this 

AD, to allow relief from the fuel boost 

pump cartridge life limits. 


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93160 Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Rules and Regulations 

Conclusion 

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 this State of 

Design Authority, it has notified the 

FAA of the unsafe condition described 

in the MCAI referenced above. The FAA 

reviewed the relevant data, considered 

the comments received, and determined 

that air safety requires adopting this AD 

as proposed. Accordingly, the FAA is 

issuing this AD to address the unsafe 

condition on this product. Except for 

minor editorial changes, and any other 

changes described previously, this AD is 

adopted as proposed in the NPRM. 

None of the changes will increase the 

economic burden on any operator. 

Material Incorporated by Reference 

Under 1 CFR Part 51 

Transport Canada AD CF–2023–69 

describes airworthiness limitations for 

fuel tank systems, safe life limits, and 

certification maintenance requirements. 

This AD also requires Airbus Canada 

Limited Partnership A220 

Airworthiness Limitations, BD500– 

3AB48–11400–02, Issue 014.00, dated 

February 3, 2022, which the Director of 

the Federal Register approved for 

incorporation by reference as of May 12, 

2023 (88 FR 20751, April 7, 2023). 

This AD also requires Airbus Canada 

Limited Partnership A220 

Airworthiness Limitations, BD500– 

3AB48–11400–02, Issue 011.00, dated 

June 18, 2020, which the Director of the 

Federal Register approved for 

incorporation by reference as of March 

30, 2021 (86 FR 10799, February 23, 

2021). 

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 99 airplanes of U.S. registry. The 

FAA estimates the following costs to 

comply with this AD: 

The FAA estimates the total cost per 

operator for the retained actions from 

AD 2023–05–08 to be $7,650 (90 workhours × $85 per work-hour). 

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 FAA estimates 

the total cost per operator for the new 

actions 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 

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. 

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: 

■ a. Removing Airworthiness Directive 

(AD) 2023–05–08, Amendment 39– 

22377 (88 FR 20751, April 7, 2023); and 

■ b. Adding the following new AD: 

2024–22–01 Airbus Canada Limited 

Partnership (Type Certificate Previously 

Held by C Series Aircraft Limited 

Partnership (CSALP); Bombardier, Inc.): 

Amendment 39–22872; Docket No. 

FAA–2024–1285; Project Identifier 

MCAI–2023–01146–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective December 31, 2024. 

(b) Affected ADs 

This AD replaces AD 2023–05–08, 

Amendment 39–22377 (88 FR 20751, April 7, 

2023) (AD 2023–05–08). 

(c) Applicability 

This AD applies to Airbus Canada Limited 

Partnership airplanes, certificated in any 

category, as identified in paragraphs (c)(1) 

and (2) of this AD. 

(1) Model BD–500–1A10 airplanes, serial 

numbers 50001 and subsequent with an 

original airworthiness certificate or original 

export certificate of airworthiness issued on 

or before August 17, 2023. 

(2) Model BD–500–1A11 airplanes, serial 

numbers 55001 and subsequent with an 

original airworthiness certificate or original 

export certificate of airworthiness issued on 

or before August 17, 2023. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 05, Time Limits/Maintenance 

Checks. 

(e) Reason 

This AD was prompted by a determination 

that new or more restrictive airworthiness 

limitations are necessary. The FAA is issuing 

this AD to address reduced structural 

integrity of the airplane or reduced 

controllability of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Retained Revision of the Existing 

Maintenance or Inspection Program, With 

Revised Language 

This paragraph restates the requirements of 

paragraph (g) of AD 2023–05–08, with 

revised language. For airplanes with an 

original airworthiness certificate or original 

export certificate of airworthiness issued on 

or before June 18, 2020: Within 90 days after 

March 30, 2021 (the effective date of AD 

2021–04–05, Amendment 39–21426 (86 FR 

10799, February 23, 2021)), revise the 

existing maintenance or inspection program, 

as applicable, to incorporate the information 

specified in Section 03, ‘‘Candidate CMR 

Limitations—General,’’ of Airbus Canada 

Limited Partnership A220 Airworthiness 


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Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Rules and Regulations 93161 

Limitations, BD500–3AB48–11400–02, Issue 

011.00, dated June 18, 2020. The initial 

compliance time for doing the tasks is at the 

time specified in Airbus Canada Limited 

Partnership A220 Airworthiness Limitations, 

BD500–3AB48–11400–02, Issue 011.00, 

dated June 18, 2020, or within 90 days after 

March 30, 2021, whichever occurs later. 

(h) Retained No Alternative Actions, 

Intervals, or Critical Design Configuration 

Control Limitations (CDCCLs), With Revised 

Language 

This paragraph restates the requirements of 

paragraph (h) of AD 2023–05–08 with revised 

language. After the existing maintenance or 

inspection program has been revised as 

required by paragraph (g) of this AD, no 

alternative actions (e.g., inspections), 

intervals, or CDCCLs may be used unless the 

actions, intervals, and CDCCLs are approved 

as an alternative method of compliance. 

(i) Retained Revision of the Existing 

Maintenance or Inspection Program, With a 

New Terminating Action 

This paragraph restates the requirements of 

paragraph (i) of AD 2023–05–08, with a new 

terminating action. For airplanes with an 

original airworthiness certificate or original 

export certificate of airworthiness issued on 

or before February 3, 2022: Within 90 days 

after May 12, 2023 (the effective date of AD 

2023–05–08), revise the existing maintenance 

or inspection program, as applicable, to 

incorporate the information specified in 

Sections 01, ‘‘Airworthiness limitations— 

Introduction;’’ 02, ‘‘Certification maintenance 

requirements—General;’’ 04, ‘‘ALI structural 

inspections—General;’’ 05, ‘‘Life limited 

parts—General;’’ 06, ‘‘Fuel system 

limitations—General;’’ 07, ‘‘Critical design 

configuration control limitations—General;’’ 

08, ‘‘Power plant limitations—General;’’ 09, 

‘‘Structural repair limitations—General;’’ and 

10, ‘‘Limit of validity—General;’’ inclusive of 

Airbus Canada Limited Partnership A220 

Airworthiness Limitations, BD500–3AB48– 

11400–02, Issue 014.00, dated February 3, 

2022. The initial compliance time for doing 

the tasks is at the time specified in Airbus 

Canada Limited Partnership A220 

Airworthiness Limitations, BD500–3AB48– 

11400–02, Issue 014.00, dated February 3, 

2022, or within 90 days after May 12, 2023, 

whichever occurs later. Accomplishing the 

revision of the existing maintenance or 

inspection program required by paragraph (k) 

of this AD terminates the requirements of this 

paragraph. 

(j) Retained No Alternative Actions, 

Intervals, or CDCCLs, With a New Exception 

This paragraph restates the requirements of 

paragraph (j) of AD 2023–05–08, with a new 

exception. Except as required by paragraph 

(k) of this AD, after the existing maintenance 

or inspection program has been revised as 

required by paragraph (i) of this AD, no 

alternative actions (e.g., inspections), 

intervals, or CDCCLs may be used unless the 

actions, intervals, and CDCCLs are approved 

as an alternative method of compliance 

(AMOC) in accordance with the procedures 

specified in paragraph (n)(1) of this AD. 

(k) New Revision of the Existing 

Maintenance or Inspection Program 

Except as specified in paragraph (l) of this 

AD: Comply with all required actions and 

compliance times specified in, and in 

accordance with, Transport Canada AD CF– 

2023–69, dated October 5, 2023 (Transport 

Canada AD CF–2023–69). Accomplishing the 

revision of the existing maintenance or 

inspection program required by this 

paragraph terminates the requirements of 

paragraph (i) of this AD. 

(l) Exception to Transport Canada AD CF– 

2023–69 

(1) Where Transport Canada AD CF–2023– 

69 refers to its effective date, this AD requires 

using the effective date of this AD. 

(2) Where paragraph A. of Transport 

Canada AD CF–2023–69 specifies to ‘‘amend 

the TC-approved maintenance schedule,’’ 

this AD requires replacing that text with 

‘‘revise the existing maintenance or 

inspection program, as applicable.’’ 

(3) Where paragraph A. of Transport 

Canada AD CF–2023–69 specifies 

incorporating Airbus Canada Limited 

Partnership A220 Airworthiness Limitations, 

BD500–3AB48–11400–02, Issue 017.01, 

dated August 17, 2023, for this AD, 

incorporating the information specified in 

Section 03, ‘‘Candidate CMR Limitations— 

General’’ of Airbus Canada Limited 

Partnership A220 Airworthiness Limitations, 

BD500–3AB48–11400–02, Issue 017.01, 

dated August 17, 2023, is not required. 

(4) The initial compliance time for doing 

the tasks specified in paragraph A. of 

Transport Canada AD CF–2023–69 is at the 

applicable ‘‘thresholds’’ as incorporated by 

the requirements of paragraph A. of 

Transport Canada AD CF–2023–69, or within 

90 days after the effective date of this AD, 

whichever occurs later. 

(5) This AD does not adopt paragraph B. 

of Transport Canada AD CF–2023–69. 

(m) New Provisions for Alternative Actions, 

Intervals, or CDCCLs 

After the existing maintenance or 

inspection program has been revised as 

required by paragraph (k) of this AD, no 

alternative actions (e.g., inspections), 

intervals, or CDCCLs may be used unless 

they are approved as specified in the 

provisions of the ‘‘Corrective Actions’’ 

section of Transport Canada AD CF–2023–69. 

(n) Additional AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, International 

Validation 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 International Validation 

Branch, mail it to the address identified in 

paragraph (o) of this AD. Information may be 

emailed to: AMOC@faa.gov. 

(i) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the responsible Flight Standards Office. 

(ii) AMOCs approved previously for AD 

2023–05–08 are approved as AMOCs for the 

corresponding provisions of paragraphs (g) 

and (i) of this AD. 

(iii) AMOCs approved previously for AD 

2023–05–08 are approved as AMOCs for the 

corresponding provisions of paragraph (k) of 

this AD, except AMOCs that allow issues 

earlier than Airbus Canada Limited 

Partnership A220 Airworthiness Limitations, 

BD500–3AB48–11400–02, Issue 017.01, 

dated August 17, 2023. 

(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, International Validation 

Branch, FAA; or Transport Canada; or Airbus 

Canada Limited Partnership’s Transport 

Canada Design Approval Organization 

(DAO). If approved by the DAO, the approval 

must include the DAO-authorized signature. 

(o) Additional Information 

For more information about this AD, 

contact Gabriel D. Kim, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 516– 

228–7343; email 9-avs-nyaco-cos@faa.gov. 

(p) 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. 

(3) The following service information was 

approved for IBR on December 31, 2024. 

(i) Transport Canada AD CF–2023–69, 

dated October 5, 2023. 

(ii) [Reserved] 

(4) The following service information was 

approved for IBR on May 12, 2023 (88 FR 

20751, April 7, 2023). 

(i) Airbus Canada Limited Partnership 

A220 Airworthiness Limitations, BD500– 

3AB48–11400–02, Issue 014.00, dated 

February 3, 2022. 

(ii) [Reserved] 

(5) The following service information was 

approved for IBR on March 30, 2021 (86 FR 

10799, February 23, 2021). 

(i) Airbus Canada Limited Partnership 

A220 Airworthiness Limitations, BD500– 

3AB48–11400–02, Issue 011.00, dated June 

18, 2020. 

(ii) [Reserved] 

(6) For Transport Canada material 

identified in this AD, contact Transport 

Canada, Transport Canada National Aircraft 

Certification, 159 Cleopatra Drive, Nepean, 

Ontario K1A 0N5, Canada; telephone 888– 

663–3639; email TC.AirworthinessDirectivesConsignesdenavigabilite.TC@tc.gc.ca; 

website at tc.canada.ca/en/aviation. 

(7) For Airbus Canada Limited Partnership 

material identified in this AD, contact Airbus 

Canada Limited Partnership, 13100 HenriFabre Boulevard, Mirabel, Que ́bec J7N 3C6, 

Canada; telephone 450–476–7676; email 

a220_crc@abc.airbus; website 

a220world.airbus.com. 


lotter on DSK11XQN23PROD with RULES1
93162 Federal Register / Vol. 89, No. 228 / Tuesday, November 26, 2024 / Rules and Regulations 

(8) 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. 

(9) You may view this material at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

visit www.archives.gov/federal-register/cfr/ 

ibr-locations, or email fr.inspection@

nara.gov. 

Issued on November 20, 2024. 

Peter A. White, 

Deputy Director, Integrated Certificate 

Management Division, Aircraft Certification 

Service. 

[FR Doc. 2024–27591 Filed 11–25–24; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–1692; Project 

Identifier MCAI–2024–00050–T; Amendment 

39–22878; AD 2024–22–07] 

RIN 2120–AA64 

Airworthiness Directives; De Havilland 

Aircraft of Canada Limited (Type 

Certificate Previously Held by 

Bombardier, Inc.) Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

De Havilland Aircraft of Canada Limited 

Model DHC–8–401 and –402 airplanes. 

This AD was prompted by a report of an 

in-flight event where isolation valve 

caution messages were received. This 

AD requires inspecting the fuse/shuttle 

valve serial numbers, and replacing 

certain fuse/shuttle valves, as specified 

in a Transport Canada AD, which is 

incorporated by reference (IBR). The 

FAA is issuing this AD to address the 

unsafe condition on these products. 

DATES: This AD is effective December 

31, 2024. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of December 31, 2024. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2024–1692; 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, the mandatory 

continuing airworthiness information 

(MCAI), 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. 

Material Incorporated by Reference: 

• For Transport Canada material 

identified in this AD, contact Transport 

Canada, Transport Canada National 

Aircraft Certification, 159 Cleopatra 

Drive, Nepean, Ontario K1A 0N5, 

Canada; telephone 888–663–3639; email 

TC.AirworthinessDirectivesConsignesdenavigabilite.TC@tc.gc.ca. 

You may find this material on the 

Transport Canada website at 

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. 

It is also available at regulations.gov 

under Docket No. FAA–2024–1692. 

FOR FURTHER INFORMATION CONTACT: 

Gabriel Kim, Aviation Safety Engineer, 

FAA, 1600 Stewart Avenue, Suite 410, 

Westbury, NY 11590; telephone: 516– 

228–7300; email: 9-avs-nyaco-cos@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to certain De Havilland Aircraft of 

Canada Limited Model DHC–8–401 and 

–402 airplanes. The NPRM published in 

the Federal Register on June 21, 2024 

(89 FR 51988). The NPRM was 

prompted by AD CF–2024–01, dated 

January 11, 2024, issued by Transport 

Canada, which is the aviation authority 

for Canada (Transport Canada AD CF– 

2024–01) (also referred to as the MCAI). 

The MCAI states that an in-service event 

was reported where the crew received a 

number two isolation valve (ISO #2) 

caution message followed by a number 

one isolation valve (ISO #1) caution 

message. The landing gear was extended 

via an alternate extension system as the 

crew prepared for landing. Upon 

landing, the crew used the emergency 

brake to stop the airplane. The airplane 

stopped safely within the runway limits. 

Subsequent maintenance activity 

discovered an external leak from the 

main landing gear (MLG) brake 

assembly, and it was found that the 

fuse/shuttle valve assembly did not 

function properly. Further investigation 

revealed that the fuse/shuttle valve 

assembly failure resulted from a factory 

assembly error, which occurred on a 

limited number of fuse/shuttle valves. 

The assembly error can cause valve 

deformation leading to premature wear, 

and eventually fuse/shuttle valve 

failure. This condition, if not corrected, 

could result in the loss of powered 

landing gear extension/retraction, 

outboard and inboard spoilers, nose 

wheel steering, and normal braking, and 

possibly a runway excursion. 

In the NPRM, the FAA proposed to 

require inspecting the fuse/shuttle valve 

serial numbers, and replacing certain 

fuse/shuttle valves, as specified in 

Transport Canada AD CF–2024–01. The 

FAA is issuing this AD to address the 

unsafe condition on these products. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2024–1692. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received a comment from 

Air Line Pilots Association, 

International (ALPA). The following 

presents the comment received on the 

NPRM and the FAA’s response to the 

comment. 

Request To Reduce Compliance Time 

ALPA stated the compliance time of 

8,000 flight hours or 48 months 

whichever occurs first after the effective 

date of the proposed AD is excessive for 

such unsafe condition, that could result 

in the loss of powered landing gear 

extension/retraction, outboard and 

inboard spoilers, nose wheel steering, 

normal braking, and possibly a runway 

excursion. The FAA infers that ALPA is 

requesting the FAA reduce the 

compliance time. 

The FAA does not agree with the 

request. The FAA has determined that 

Transport Canada’s compliance time 

calculation is adequate. The low 

probability of a critical event is due to 

the single occurrence and high flight 

hours. In addition, multiple isolation 

valves can effectively mitigate hydraulic 

fluid leaks. After considering all the 

available information, the FAA has 

determined that the compliance time, as 

proposed, represents an appropriate 

interval of time in which the required 

actions can be performed in a timely 

manner within the affected fleet, while 

still maintaining an adequate level of 

safety. Additionally, the FAA notes that 

there has been only one event of an inservice aircraft, and in that event, the 

aircraft landed safely. With only one 

event and the high amount of flight 

hours in the fleet, the probability of the 


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