Federal Register / Vol. 89, No. 218 / Tuesday, November 12, 2024 / Rules and Regulations 88881 

FAA is issuing this AD to address ELT 

antenna failure. The unsafe condition, if not 

addressed, could result in loss of the ELT 

antenna and the development of fuselage 

cracks that can result in an inability to 

maintain cabin pressure. 

(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, Transport Canada AD CF– 

2022–67. 

(h) Exception to Transport Canada AD CF– 

2022–67 

(1) Where Transport Canada AD CF–2022– 

67 refers to its effective date, this AD requires 

using the effective date of this AD. 

(2) Where Transport Canada AD CF–2022– 

67 refers to April 1, 2021 (the effective date 

of Transport Canada AD CF–2021–10, dated 

March 18, 2021), this AD requires using May 

4, 2021 (the effective date of AD 2021–09– 

03). 

(3) Where Transport Canada AD CF–2022– 

67 refers to hours air time, this AD requires 

using flight hours. 

(4) Where paragraph C of Transport Canada 

AD CF–2022–67 specifies to ‘‘replace the ELT 

antenna with a new aluminum ELT antenna 

and inspect the exterior fuselage skin around 

the ELT antenna attachment holes for 

damage, repairing any damage found before 

further flight,’’ this AD requires replacing 

that text with ‘‘replace the ELT antenna with 

a new aluminum ELT antenna, including 

doing an inspection of the exterior fuselage 

skin around the ELT antenna attachment 

holes for damage, and, before further flight, 

repair any damage found.’’ 

(i) 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 (j) of this AD. Information may be 

emailed to: 9-AVS-NYACO-COS@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 

2021–09–03 are not approved as AMOCs for 

the corresponding provisions of Transport 

Canada AD CF–2022–67 that are required by 

paragraph (g) of this AD. 

(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. 

(j) Additional Information 

For more information about this AD, 

contact Yaser Osman, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; phone: 860–386– 

1786; email: yaser.m.osman@faa.gov. 

(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 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 this AD specifies otherwise. 

(i) Transport Canada AD CF–2022–67, 

dated December 6, 2022. 

(ii) [Reserved] 

(3) 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 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. 

(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-locations or email fr.inspection@nara.gov. 

Issued on October 24, 2024. 

Peter A. White, 

Deputy Director, Integrated Certificate 

Management Division, Aircraft Certification 

Service. 

[FR Doc. 2024–25977 Filed 11–8–24; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–1894; Project 

Identifier MCAI–2024–00036–T; Amendment 

39–22873; AD 2024–22–02] 

RIN 2120–AA64 

Airworthiness Directives; Airbus SAS 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is superseding 

Airworthiness Directive (AD) 2023–21– 

02, which applied to certain Airbus SAS 

Model A330–200 series, A330–200 

Freighter series, A330–300 series, 

A330–800 series, and A330–900 series 

airplanes. AD 2023–21–02 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 2023–21–02 and requires revising 

the existing maintenance or inspection 

program, as applicable, to incorporate 

new or more restrictive airworthiness 

limitations, as specified in a European 

Union Aviation Safety Agency (EASA) 

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 

17, 2024. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of December 17, 2024. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain other publications listed in 

this AD as of December 11, 2023 (88 FR 

76107, November 6, 2023). 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2024–1894; 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 EASA material identified in this 

AD, contact EASA, Konrad-AdenauerUfer 3, 50668 Cologne, Germany; 

telephone +49 221 8999 000; email 

ADs@easa.europa.eu; website 

easa.europa.eu. You may find this 

material on the EASA website at 

ad.easa.europa.eu. 

• 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–2024–1894. 

FOR FURTHER INFORMATION CONTACT: 

Vladimir Ulyanov, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, 


khammond on DSKJM1Z7X2PROD with RULES
88882 Federal Register / Vol. 89, No. 218 / Tuesday, November 12, 2024 / Rules and Regulations 

Suite 410, Westbury, NY 11590; 

telephone 206–231–3229; email 

vladimir.ulyanov@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to supersede AD 2023–21–02, 

Amendment 39–22574 (88 FR 76107, 

November 6, 2023) (AD2023–21–02). 

AD 2023–21–02 applied to certain 

Airbus SAS Model 330–201, –202, –203, 

–223, –223F, –243, –243F, –301, –302, 

–303, –321, –322, –323, –341, –342, 

–343, –841 and –941 airplanes. AD 

2023–21–02 required revising the 

existing maintenance or inspection 

program, as applicable, to incorporate 

new or more restrictive airworthiness 

limitations. The FAA issued AD 2023– 

21–02 to address fatigue cracking, 

accidental damage, and corrosion in 

principal structural elements; such 

fatigue cracking, accidental damage, and 

corrosion could result in reduced 

structural integrity of the airplane. 

The NPRM published in the Federal 

Register on July 24, 2024 (89 FR 59853). 

The NPRM was prompted by AD 2024– 

0011, dated January 10, 2024 (EASA AD 

2024–0011) (also referred to as the 

MCAI), issued by EASA, which is the 

Technical Agent for the Member States 

of the European Union. The MCAI states 

that new or more restrictive 

airworthiness limitations have been 

developed. 

In the NPRM, the FAA proposed to 

continue to require certain actions in 

AD 2023–21–02 and to require revising 

the existing maintenance or inspection 

program, as applicable, to incorporate 

new or more restrictive airworthiness 

limitations, as specified in EASA AD 

2024–0011. 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–2024–1894. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received a comment from 

Air Line Pilots Association, 

International (ALPA), who supported 

the NPRM without change. 

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 comment 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, 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 

EASA AD 2024–0011, dated January 

10, 2024, specifies new or more 

restrictive airworthiness limitations for 

airplane structures. 

This AD also requires EASA AD 

2022–0187, dated September 13, 2022, 

and EASA AD 2023–0015, dated 

January 19, 2023, which the Director of 

the Federal Register approved for 

incorporation by reference as of 

December 11, 2023 (88 FR 76107, 

November 6, 2023). 

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 126 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 2023–21–02 to be $7,650 (90 workhours × $85 per work-hour). 

The FAA has determined that revising 

the existing maintenance or inspection 

program takes an average of 90 workhours 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. 

The FAA estimates the total cost per 

operator for the new actions to be 

$7,650 (90 work-hours × $85 per workhour). 

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) 2023–21–02, Amendment 39– 

22574 (88 FR 76107, November 6, 2023); 

and 

■ b. Adding the following new AD: 

2024–22–02 Airbus SAS: Amendment 39– 

22873; Docket No. FAA–2024–1894; 

Project Identifier MCAI–2024–00036–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective December 17, 2024. 


khammond on DSKJM1Z7X2PROD with RULES
Federal Register / Vol. 89, No. 218 / Tuesday, November 12, 2024 / Rules and Regulations 88883 

(b) Affected ADs 

This AD replaces AD 2023–21–02, 

Amendment 39–22574 (88 FR 76107, 

November 6, 2023) (AD 2023–21–02). 

(c) Applicability 

This AD applies to Airbus SAS airplanes, 

identified in paragraphs (c)(1) through (5) of 

this AD, certificated in any category, with an 

original airworthiness certificate or original 

export certificate of airworthiness issued on 

or before October 20, 2023. 

(1) Model A330–201, –202, –203, –223, and 

–243 airplanes. 

(2) Model A330–223F and –243F airplanes. 

(3) Model A330–301, –302, –303, –321, 

–322, –323, –341, –342, and –343 airplanes. 

(4) Model A330–841 airplanes. 

(5) Model A330–941 airplanes. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 05, Time Limits/Maintenance 

Checks. 

(e) Unsafe Condition 

This AD was prompted by a determination 

that new or more restrictive airworthiness 

limitations are necessary. The FAA is issuing 

this AD to address fatigue cracking, 

accidental damage, and corrosion in 

principle structural elements. The unsafe 

condition, if not addressed, could result in 

reduced structural integrity 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 

New Terminating Action 

This paragraph restates the requirements of 

paragraph (j) of AD 2023–21–02, with new 

terminating action. For airplanes with an 

original airworthiness certificate or original 

export certificate of airworthiness issued on 

or before November 18, 2022: Except as 

specified in paragraph (h) of this AD, comply 

with all required actions and compliance 

times specified in, and in accordance with, 

European Union Aviation Safety Agency 

(EASA) AD 2022–0187, dated September 13, 

2022 (EASA AD 2022–0187), and AD 2023– 

0015, dated January 19, 2023 (EASA AD 

2023–0015); as applicable. Where EASA AD 

2023–0015 affects the same airworthiness 

limitations as those in EASA AD 2022–0187, 

the airworthiness limitations referenced in 

EASA AD 2023–0015 prevail. Accomplishing 

the revision of the existing maintenance or 

inspection program required by paragraph (j) 

of this AD terminates the requirements of this 

paragraph. 

(h) Retained Exceptions to EASA AD 2022– 

0187 and EASA AD 2023–0015, With No 

Changes 

This paragraph restates the exceptions 

specified in paragraph (k) of AD 2023–21–02, 

with no changes. 

(1) This AD does not adopt the 

requirements specified in paragraphs (1) and 

(2) of EASA AD 2022–0187 and of EASA AD 

2023–0015. 

(2) Paragraph (3) of EASA AD 2022–0187 

and of EASA AD 2023–0015 specifies 

revising ‘‘the AMP’’ within 12 months after 

the respective EASA AD’s effective date, but 

this AD requires revising the existing 

maintenance or inspection program, as 

applicable, within 90 days after December 11, 

2023 (the effective date of AD 2023–21–02). 

(3) The initial compliance time for doing 

the tasks specified in paragraph (3) of EASA 

AD 2022–0187 and of EASA AD 2023–0015 

is at the applicable ‘‘associated thresholds’’ 

as incorporated by the requirements of 

paragraph (3) of EASA AD 2022–0187 and of 

EASA AD 2023–0015, or within 90 days after 

December 11, 2023 (the effective date of AD 

2023–21–02), whichever occurs later. 

(4) This AD does not adopt the provisions 

specified in paragraphs (4) and (5) of EASA 

AD 2022–0187. 

(5) Where EASA AD 2022–0187 defines 

‘‘The ALS,’’ replace the text ‘‘Airbus A330 

Airworthiness Limitations Section (ALS) Part 

2 Revision 05,’’ with ‘‘Airbus A330 

Airworthiness Limitations Section (ALS) Part 

2 Revision 05 Issue 02.’’ 

(6) This AD does not adopt the provisions 

specified in paragraph (4) of EASA AD 2023– 

0015. 

(7) This AD does not require incorporating 

Section 4, ‘‘Damage Tolerant—Airworthiness 

Limitations Items—Tasks Beyond MPPT,’’ of 

‘‘the ALS’’ specified in EASA AD 2022–0187 

and in EASA AD 2023–0015. 

(8) This AD does not adopt the ‘‘Remarks’’ 

section of EASA AD 2022–0187 and of EASA 

AD 2023–0015. 

(i) Retained Provisions for Alternative 

Actions and Intervals, With a New Exception 

This paragraph restates the provisions of 

paragraph (l) of AD 2023–21–02, with a new 

exception. Except as required by paragraph 

(j) of this AD, no alternative actions (e.g., 

inspections) and intervals are allowed unless 

they are approved as specified in the 

provisions of the ‘‘Ref. Publications’’ section 

of EASA AD 2022–0187 or of EASA AD 

2023–0015. 

(j) New Revision of the Existing Maintenance 

or Inspection Program 

Except as specified in paragraph (k) of this 

AD: Comply with all required actions and 

compliance times specified in, and in 

accordance with, EASA AD 2024–0011, 

dated January 10, 2024 (EASA AD 2024– 

0011). Accomplishing the revision of the 

existing maintenance or inspection program 

required by this paragraph terminates the 

requirements of paragraph (g) of this AD. 

(k) Exceptions to EASA AD 2024–0011 

(1) This AD does not adopt the 

requirements specified in paragraphs (1) and 

(2) of EASA AD 2024–0011. 

(2) Paragraph (3) of EASA AD 2024–0011 

specifies revising ‘‘the approved AMP,’’ 

within 12 months after its effective date, but 

this AD requires revising the existing 

maintenance or inspection program, as 

applicable, within 90 days after the effective 

date of this AD. 

(3) The initial compliance time for doing 

the tasks specified in paragraph (3) of EASA 

AD 2024–0011 is at the applicable 

‘‘associated thresholds’’ as incorporated by 

the requirements of paragraph (3) of EASA 

AD 2024–0011, or within 90 days after the 

effective date of this AD, whichever occurs 

later. 

(4) This AD does not adopt the provisions 

specified in paragraphs (4) and (5) of EASA 

AD 2024–0011. 

(5) This AD does not adopt the ‘‘Remarks’’ 

section of EASA AD 2024–0011. 

(6) This AD does not require incorporating 

Section 4, ‘‘Damage Tolerant—Airworthiness 

Limitations Items—Tasks Beyond MPPT,’’ of 

‘‘the ALS’’ specified in EASA 2024–0011. 

(l) New Provisions for Alternative Actions 

and Intervals 

After the existing maintenance or 

inspection program has been revised as 

required by paragraph (j) of this AD, no 

alternative actions (e.g., inspections) and 

intervals are allowed unless they are 

approved as specified in the provisions of the 

‘‘Ref. Publications’’ section of EASA AD 

2024–0011. 

(m) 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 (n) of this AD. Information may be 

emailed to: AMOC@faa.gov. 

(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 EASA; or Airbus SAS’s 

EASA Design Organization Approval (DOA). 

If approved by the DOA, the approval must 

include the DOA-authorized signature. 

(n) Additional Information 

For more information about this AD, 

contact Vladimir Ulyanov, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 206– 

231–3229; email vladimir.ulyanov@faa.gov. 

(o) 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 this AD specifies otherwise. 

(3) The following material was approved 

for IBR on December 17, 2024. 

(i) European Union Aviation Safety Agency 

(EASA) AD 2024–0011, dated January 10, 

2024. 

(ii) [Reserved] 

(4) The following material was approved 

for IBR on December 11, 2023 (88 FR 76107, 

November 6, 2023). 


khammond on DSKJM1Z7X2PROD with RULES
88884 Federal Register / Vol. 89, No. 218 / Tuesday, November 12, 2024 / Rules and Regulations 

(i) European Union Aviation Safety Agency 

(EASA) AD 2022–0187, dated September 13, 

2022. 

(ii) European Union Aviation Safety 

Agency (EASA) AD 2023–0015, dated 

January 19, 2023. 

(5) For EASA AD 2022–0187, EASA AD 

2023–0015, and EASA AD 2024–0011, 

contact EASA, Konrad-Adenauer-Ufer 3, 

50668 Cologne, Germany; telephone +49 221 

8999 000; email ADs@easa.europa.eu; 

website easa.europa.eu. You may find these 

EASA ADs on the EASA website at 

ad.easa.europa.eu. 

(6) 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. 

(7) 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 23, 2024. 

Suzanne Masterson, 

Deputy Director, Integrated Certificate 

Management Division, Aircraft Certification 

Service. 

[FR Doc. 2024–25980 Filed 11–8–24; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–2007; Project 

Identifier MCAI–2023–01270–T; Amendment 

39–22871; AD 2024–21–04] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc., Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for all 

Bombardier, Inc., Model BD–100–1A10 

airplanes. This AD was prompted by a 

determination that new or more 

restrictive maintenance tasks are 

necessary. This AD requires revising the 

existing maintenance or inspection 

program, as applicable, to incorporate 

new or more restrictive maintenance 

tasks. The FAA is issuing this AD to 

address the unsafe condition on these 

products. 

DATES: This AD is effective December 

17, 2024. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of December 17, 2024. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2024–2007; 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 Bombardier, Inc. material 

identified in this AD, contact 

Bombardier Business Aircraft Customer 

Response Center, 400 Coˆte Vertu Road 

West, Dorval, Que ́bec H4S 1Y9, Canada; 

telephone 514–855–2999; email ac.yul@

aero.bombardier.com; website 

bombardier.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–2024–2007. 

FOR FURTHER INFORMATION CONTACT: 

Steven Dzierzynski, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; 

telephone: 516–228–7300; email: 9-avsnyaco-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 all Bombardier, Inc., Model 

BD–100–1A10 airplanes. The NPRM 

published in the Federal Register on 

August 9, 2024 (89 FR 65267). The 

NPRM was prompted by AD CF–2023– 

78, dated December 19, 2023, issued by 

Transport Canada, which is the aviation 

authority for Canada (also referred to as 

the MCAI). The MCAI states that 

airplanes could experience misleading 

electrical system status indications 

(push button annunciators (PBA) and 

engine instrument and crew alerting 

system (EICAS)) as a result of 

contamination of electrical contacts in 

the left-hand (LH) direct current power 

center (DCPC) internal communication 

data bus. The MCAI states that new or 

more restrictive maintenance tasks have 

been developed to rectify lower time LH 

DCPC units not addressed by previously 

issued ADs. 

In the NPRM, the FAA proposed to 

require revising the existing 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive maintenance tasks. The FAA 

is issuing this AD to address erratic 

indications, which could cause the 

flightcrew to turn off fully operational 

electrical power sources, leading to 

partial or complete loss of electrical 

power. The unsafe condition, if not 

addressed, could result in loss of flight 

displays and reduced controllability of 

the airplane. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2024–2007. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received no comments on 

the NPRM or on the determination of 

the cost to the public. 

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 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, 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 

The FAA reviewed the following 

documents: 

• Task 24–61–01–101*, ‘‘Restoration 

of the left DC Power Center (DCPC) (Pre 

SB100–24–30),’’ Section 5–10–20, 

‘‘Time Limits—Supplementary 

Limitations,’’ of Part 2, ‘‘Airworthiness 

Limitations’’, of the Bombardier 

Challenger 300 Time Limits/ 

Maintenance Checks, Publication No. 

CH 300 TLMC, Revision 24, dated 

August 9, 2023. 

• Task 24–61–01–101*, ‘‘Restoration 

of the Left DC Power Center (DCPC) (Pre 

SB350–24–005),’’ Section 5–10–20, 

‘‘Time Limits—Supplementary 

Limitations,’’ of Part 2, ‘‘Airworthiness 

Limitations,’’ of the Bombardier 

Challenger 350 Time Limits/ 

Maintenance Checks, Publication No. 

CH 350 TLMC, Revision 14, dated 

August 9, 2023. 

This material specifies new or more 

restrictive airworthiness limitations for 


khammond on DSKJM1Z7X2PROD with RULES