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 


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Federal Register / Vol. 89, No. 218 / Tuesday, November 12, 2024 / Rules and Regulations 88885 

safe life limits. These documents are 

distinct since they apply to different 

airplane configurations. The asterisk (or 

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

the task numbers indicates that the task 

is an airworthiness limitation task. 

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 ADDRESSES section. 

Costs of Compliance 

The FAA estimates that this AD 

affects 356 airplanes of U.S. registry. 

The FAA estimates the following costs 

to comply with this AD. 

The FAA has determined that revising 

the maintenance or inspection program 

takes an average of 90 work-hours per 

operator, although the agency 

recognizes that this number may vary 

from operator to operator. Since 

operators incorporate maintenance or 

inspection program changes for their 

affected fleet(s), the FAA has 

determined that a per-operator estimate 

is more accurate than a per-airplane 

estimate. Therefore, the agency 

estimates the average total cost per 

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

$85 per work-hour). 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. Subtitle VII: 

Aviation Programs, describes in more 

detail the scope of the Agency’s 

authority. 

The FAA is issuing this rulemaking 

under the authority described in 

Subtitle VII, Part A, Subpart III, Section 

44701: General requirements. Under 

that section, Congress charges the FAA 

with promoting safe flight of civil 

aircraft in air commerce by prescribing 

regulations for practices, methods, and 

procedures the Administrator finds 

necessary for safety in air commerce. 

This regulation is within the scope of 

that authority because it addresses an 

unsafe condition that is likely to exist or 

develop on products identified in this 

rulemaking action. 

Regulatory Findings 

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 adding 

the following new airworthiness 

directive: 

2024–21–04 Bombardier, Inc.: Amendment 

39–22871; Docket No. FAA–2024–2007; 

Project Identifier MCAI–2023–01270–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective December 17, 2024. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all Bombardier, Inc., 

Model BD–100–1A10 airplanes, certificated 

in any category. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 24, Electrical Power. 

(e) Unsafe Condition 

This AD was prompted by a determination 

that new or more restrictive maintenance 

tasks are necessary. 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. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Maintenance or Inspection Program 

Revision 

Within 60 days after the effective date of 

this AD, revise the existing maintenance or 

inspection program, as applicable, to 

incorporate the information specified in the 

tasks specified in figure 1 to paragraph (g) of 

this AD, of Part 2, ‘‘Airworthiness 

Limitations,’’ of the applicable Time Limits/ 

Maintenance Checks (TLMC) manual. The 

initial compliance time for doing the tasks is 

at the interval specified in the applicable 

TLMC manual specified in figure 1 to 

paragraph (g) of this AD, or within 60 days 

after the effective date of this AD, whichever 

occurs later. 

FIGURE 1 TO PARAGRAPH (g)—TIME LIMITS—SUPPLEMENTARY LIMITATIONS TASKS

Airplane model Chapter 5 task 

No. Task title TLMC section TLMC 

BD–100–1A10 

(Challenger 

300).

24–61–01–101 * Restoration of the Left DC Power 

Center (DCPC) (Pre SB100–24– 

30).

5–10–20, ‘‘Time Limits—Supplementary Limitations’’.Revision 24, dated August 

9, 2023. 

BD–100–1A10 

(Challenger 

350).

24–61–01–101 * Restoration of the Left DC Power 

Center (DCPC) (Pre SB350–24– 

005).

5–10–20, ‘‘Time Limits—Supplementary Limitations’’.Revision 14, dated August 

9, 2023. 

Note 1 to paragraph (g): The asterisk (or 

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

task numbers listed in figure 1 to paragraph 

(g) of this AD indicates that the task is an 

airworthiness limitation task. 

(h) No Alternative Actions or Intervals 

After the existing maintenance or 

inspection program has been revised as 

required by paragraph (g) of this AD, no 

alternative actions (e.g., inspections) or 

intervals may be used unless the actions and 

intervals are approved as an alternative 

method of compliance (AMOC) in 

accordance with the procedures specified in 

paragraph (i)(1) of this AD. 


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88886 Federal Register / Vol. 89, No. 218 / Tuesday, November 12, 2024 / Rules and Regulations 

(i) Other FAA 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: AMOC@faa.gov. 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, International Validation 

Branch, FAA; or Transport Canada; or 

Bombardier, Inc.’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 Steven Dzierzynski, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone: 516– 

228–7300; 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 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) 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. 

Note 2 to paragraph (k)(2)(i): The asterisk 

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

task numbers listed in paragraphs (k)(2)(i) 

and (ii) of this AD indicates that the task is 

an airworthiness limitation task. 

(ii) 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. 

(3) 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. 

(4) You may view this material at the FAA, 

Airworthiness Products Section, Operational 

Safety Branch, 2200 South 216th Street, 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. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2024–25979 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–2024–0767; Project 

Identifier MCAI–2023–00723–T; Amendment 

39–22786; AD 2024–14–05] 

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 certain 

Bombardier, Inc., Model BD–700–2A12 

airplanes. This AD was prompted by 

reports that the baggage bay discharge 

push-button annunciator (PBA) switch 

was making contact but was not fully 

engaged, and the tabs were not fully 

locked. This AD requires a verification 

of the baggage bay discharge PBA 

functionality and tab installation. 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. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2024–0767; 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 material, 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–2024–0767. 

FOR FURTHER INFORMATION CONTACT: 

William Reisenauer, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; phone: 

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 Bombardier, Inc., Model 

BD–700–2A12 airplanes. The NPRM 

published in the Federal Register on 

March 28, 2024 (89 FR 21443). The 

NPRM was prompted by AD CF–2023– 

36, dated May 29, 2023, issued by 

Transport Canada, which is the aviation 

authority for Canada (referred to after 

this as the MCAI). The MCAI states that 

during the execution of a functional test 

procedure (FTP) during production, the 

baggage bay discharge PBA switch was 

partially engaged and failed to make 

electrical contact. Further investigation 

showed that in some instances, the 

baggage bay discharge PBA switch was 

making contact but was not fully 

engaged and the tabs were not fully 

locked, so while the PBA may pass the 

FTP, vibration could eventually lead to 

a loss of electrical contact and 

subsequent loss of baggage bay 

discharge PBA switch functionality. 

In the NPRM, the FAA proposed to 

require a verification of the baggage bay 

discharge PBA functionality and tab 

installation. The FAA is issuing this AD 

to address the possible inability to 

discharge halon into the baggage 

compartment in case of a fire. The 

unsafe condition on these products, if 

not addressed, could result in the 

inability to control a baggage 

compartment fire. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2024–0767. 


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