63004 Federal Register / Vol. 88, No. 177 / Thursday, September 14, 2023 / Rules and Regulations 

Undesignated center heading in subpart C Old footnote New footnote 

Canada ........................................................................................................................................................ 16 1 

Central America and West Indies ................................................................................................................ 17 1 

Mexico .......................................................................................................................................................... 18 1 

■ 12. Amend § 93.317 by: 

■ a. Revising paragraph (a); and 

■ b. Redesignating paragraph (c) as 

paragraph (d) and adding a new 

paragraph (c). 

The revision and addition read as 

follows: 

§ 93.317 Horses from Canada. 

(a) Except as provided in paragraph 

(d) of this section, horses from Canada 

shall be inspected as provided in 

§ 93.306 and accompanied by a 

certificate as required by § 93.314, 

which shall include evidence of a 

negative test for equine infectious 

anemia for which blood samples were 

drawn during the 180 days preceding 

exportation to the United States and 

which test was conducted in a 

laboratory approved by the Canada 

Department of Agriculture or the United 

States Department of Agriculture. 

Horses accompanying their dams, which 

were foaled after their dam was so 

tested negative, need not be so tested 

and shall otherwise be handled as 

provided in § 93.314. Certificates 

required for horses from Canada must be 

issued and endorsed by a salaried 

veterinarian of the Canadian 

Government. USDA veterinary port 

inspection is not required for horses 

imported from Canada under temporary 

Customs authorization for a period of 30 

days from the date of issue of the 

certificate and the certificate issued is 

valid for an unlimited number of 

importations into the United States 

during the 30-day period. 

* * * * * 

(c) Any horse imported into the 

United States from Canada through air 

or ocean ports of entry must obtain an 

import permit under § 93.304 and shall 

otherwise be handled as provided in 

§§ 93.305 and 93.314. 

* * * * * 

■ 13. Revise § 93.319 to read as follows: 

§ 93.319 Import permit and declaration for 

horses. 

For all horses offered for importation 

from or transiting through regions of 

Central America or of the West Indies, 

the importer or his or her agent shall 

have obtained an import permit under 

§ 93.304 and shall present two copies of 

a declaration as provided in § 93.305. 

(Approved by the Office of Management 

and Budget under control number 0579– 

0485) 

§ 93.320 [Amended] 

■ 14. Amend § 93.320 by adding the 

words ‘‘or transiting through’’ after the 

word ‘‘from’’ in the section heading and 

the first sentence. 

■ 15. Amend § 93.321 by adding a 

sentence after the last sentence and an 

OMB citation at the end of the section 

to read as follows: 

§ 93.321 Import permits and applications 

for inspection for horses. 

* * * Horses quarantined at a U.S. 

facility designated in § 93.303 must 

obtain an import permit under § 93.304. 

(Approved by the Office of Management 

and Budget under control number 0579– 

0485) 

■ 16. Amend § 93.324 by redesignating 

footnote 19 as footnote 1 and revising it 

to read as follows: 

§ 93.324 Detention for quarantine. 

* * * * * 1 Protocols for testing equines in import 

quarantine are available on the APHIS 

website at www.aphis.usda.gov/aphis/ 

ourfocus/importexport/animal-import-andexport/equine/guidelines-docs-related-toimporting-equine. 

Done in Washington, DC, this 8th day of 

September 2023. 

Michael Watson, 

Acting Administrator, Animal and Plant 

Health Inspection Service. 

[FR Doc. 2023–19864 Filed 9–13–23; 8:45 am] 

BILLING CODE 3410–34–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1052; Project 

Identifier MCAI–2023–00260–T; Amendment 

39–22532; AD 2023–17–06] 

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 CL–600–1A11 

(600), CL–600–2A12 (601), and CL–600– 

2B16 (601–3A, 601–3R, and 604 

Variants) airplanes. This AD was 

prompted by an uncommanded flap 

extension accompanied by a flaps fail 

caution message during climb. This AD 

requires initial and repetitive 

operational tests of the flap control 

system. The FAA is issuing this AD to 

address the unsafe condition on these 

products. 

DATES: This AD is effective October 19, 

2023. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of October 19, 2023. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2023–1052; 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 service information identified 

in this final rule, 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 service 

information at the FAA, Airworthiness 

Products Section, Operational Safety 

Branch, 2200 South 216th St., Des 

Moines, WA. For information on the 

availability of this material at the FAA, 

call 206–231–3195. It is also available at 

regulations.gov under Docket No. FAA– 

2023–1052. 

FOR FURTHER INFORMATION CONTACT: 

Chirayu Gupta, 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 


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Federal Register / Vol. 88, No. 177 / Thursday, September 14, 2023 / Rules and Regulations 63005 

apply to certain Bombardier, Inc., Model 

CL–600–1A11 (600), CL–600–2A12 

(601), and CL–600–2B16 (601–3A, 601– 

3R, and 604 Variants) airplanes. The 

NPRM published in the Federal 

Register on May 31, 2023 (88 FR 34794). 

The NPRM was prompted by AD CF– 

2023–07, dated February 10, 2023, 

issued by Transport Canada, which is 

the aviation authority for Canada 

(referred to after this as the MCAI). 

The MCAI states a Model CL–600– 

2B16 airplane experienced an 

uncommanded flap extension from 0 to 

45 degrees accompanied by a flaps fail 

caution message during climb. The 

airplane returned to the departure 

airport without further incident. The 

investigations of this event by Transport 

Canada and the airplane manufacturer 

found that the flap control system failed 

to arrest the uncommanded movement 

of the flap, due to a failed retract relay. 

The failed retract relay also caused the 

flap control system to operate at half 

speed, which had occurred, but was 

undetected, during previous flights. The 

root cause of the uncommanded flap 

extension remains under investigation. 

Transport Canada considers the MCAI 

to be an interim action, and further AD 

action may follow. 

In the NPRM, the FAA proposed to 

require initial and repetitive operational 

tests of the of the inboard and outboard 

flaps of the flap control system to verify 

the functionality of the retract relays. 

The FAA is issuing this AD to address 

the failure of the flap control system to 

arrest the uncommanded flap extension. 

The unsafe condition, if not addressed, 

could lead to the loss of control of the 

airplane. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2023–1052. 

Discussion of Final Airworthiness 

Directive 

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. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed the following 

service information, which specifies 

procedures for performing initial and 

repetitive operational tests of the 

inboard and outboard flaps to verify the 

functionality of the retract relays. The 

service information also specifies 

contacting the manufacturer for 

corrective action (repair) for any 

anomaly found during an operational 

test. These documents are distinct since 

they apply to different airplane models. 

• Bombardier Service Bulletin 600– 

0780, dated December 29, 2022. 

• Bombardier Service Bulletin 601– 

1112, Revision 01, dated February 23, 

2023. 

• Bombardier Service Bulletin 604– 

27–040, dated December 29, 2022. 

• Bombardier Service Bulletin 605– 

27–011, dated December 29, 2022. 

• Bombardier Service Bulletin 650– 

27–004, dated December 29, 2022. 

This service information 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. 

Interim Action 

The FAA considers this AD an 

interim action. If final action is later 

identified, the FAA might consider 

further rulemaking then. 

Costs of Compliance 

The FAA estimates that this AD 

affects 1,124 airplanes of U.S. registry. 

The FAA estimates the following costs 

to comply with this AD: 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

1 work-hour × $85 per hour = $85 ................................................................................. $0 $85 $95,540 per test cycle. 

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. 


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63006 Federal Register / Vol. 88, No. 177 / Thursday, September 14, 2023 / Rules and Regulations 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive: 

2023–17–06 Bombardier, Inc.: Amendment 

39–22532; Docket No. FAA–2023–1052; 

Project Identifier MCAI–2023–00260–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective October 19, 2023. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Bombardier, Inc., 

airplanes, certificated in any category, 

identified in paragraphs (c)(1) through (3) of 

this AD. 

(1) Model CL–600–1A11 (600) airplanes, 

serial numbers 1004 through 1085 inclusive. 

(2) Model CL–600–2A12 (601) airplanes, 

serial numbers 3001 through 3066 inclusive. 

(3) Model CL–600–2B16 (601–3A, 601–3R, 

and 604 Variants) airplanes, serial numbers 

5001 through 5194 inclusive, 5301 through 

5665 inclusive, 5701 through 5988 inclusive, 

and 6050 through 6999 inclusive. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 27, Flight Controls. 

(e) Unsafe Condition 

This AD was prompted by a Model CL– 

600–2B16 airplane that experienced an 

uncommanded flap extension from 0 to 45 

degrees accompanied by a flaps fail caution 

message during climb. The FAA is issuing 

this AD to address the failure of the flap 

control system to arrest the uncommanded 

flap extension. The unsafe condition, if not 

addressed, could lead to the loss of control 

of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Initial Operational Test 

Within 100 flight hours or 15 months, 

whichever occurs first after the effective date 

of this AD, perform an initial operational test 

of the inboard and outboard flaps, and all 

applicable corrective actions, in accordance 

with Section 2.B. of the Accomplishment 

Instructions of the applicable service 

information identified in paragraphs (g)(1) 

through (5) of this AD. Corrective actions 

must be done before further flight after the 

test. 

(1) For Model CL–600–1A11 (Challenger 

600) airplanes, serial numbers 1004 through 

1085 inclusive: Use Bombardier Service 

Bulletin 600–0780, dated December 29, 2022. 

(2) For Model CL–600–2A12 (Challenger 

601) airplanes, serial numbers 3001 through 

3066 inclusive, and Model CL–600–2B16 

(Challenger 601) airplanes, serial numbers 

5001 through 5194 inclusive: Use 

Bombardier Service Bulletin 601–1112, 

Revision 01, dated February 23, 2023. 

(3) For Model CL–600–2B16 (Challenger 

604) airplanes, serial numbers 5301 through 

5665 inclusive: Use Bombardier Service 

Bulletin 604–27–040, dated December 29, 

2022. 

(4) For Model CL–600–2B16 (Challenger 

605) airplanes, serial numbers 5701 through 

5988 inclusive: Use Bombardier Service 

Bulletin 605–27–011, dated December 29, 

2022. 

(5) For Model CL–600–2B16 (Challenger 

650) airplanes, serial numbers 6050 through 

6999 inclusive: Use Bombardier Service 

Bulletin 650–27–004, dated December 29, 

2022. 

(h) Repetitive Operational Tests 

Repeat the operational test required by 

paragraph (g) of this AD at the applicable 

time specified in paragraph (h)(1) through (3) 

of this AD. 

(1) For Model CL–600–1A11 airplanes: 

Repeat at intervals not to exceed 100 flight 

hours. 

(2) For the airplanes identified in 

paragraphs (h)(2)(i) and (ii) of this AD: 

Repeat within the repetitive intervals 

specified in Section 1.D. of Bombardier 

Service Bulletin 601–1112, Revision 01, 

dated February 23, 2023. 

(i) Model CL–600–2A12 airplanes. 

(ii) Model CL–600–2B16 airplanes, serial 

numbers 5001 through 5194 inclusive. 

(3) For the airplanes identified in 

paragraphs (h)(3)(i) through (iii) of this AD: 

Repeat the test at intervals not to exceed 400 

flight hours. 

(i) Model CL–600–2B16 airplanes, serial 

numbers 5301 through 5665 inclusive. 

(ii) Model CL–600–2B16 airplanes, serial 

numbers 5701 through 5988 inclusive. 

(iii) Model CL–600–2B16 airplanes, serial 

numbers 6050 through 6999 inclusive. 

(i) Credit for Previous Actions 

For the airplanes identified in paragraph 

(h)(2) of this AD: This paragraph provides 

credit for actions required by paragraphs (g) 

and (h) of this AD, if those actions were 

performed before the effective date of this AD 

using Bombardier Service Bulletin 601–1112, 

dated December 29, 2022. 

(j) 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 (k)(2) of this AD or email to: 9-avsnyaco-cos@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. 

(k) Additional Information 

(1) Refer to Transport Canada AD CF– 

2023–07, dated February 10, 2023, for related 

information. This Transport Canada AD may 

be found in the AD docket at regulations.gov 

under Docket No. FAA–2023–1052. 

(2) For more information about this AD, 

contact Chirayu Gupta, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 516– 

228–7300; email 9-avs-nyaco-cos@faa.gov. 

(3) Service information identified in this 

AD that is not incorporated by reference is 

available at the addresses specified in 

paragraphs (l)(3) and (4) of this AD. 

(l) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

the service information listed in this 

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

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless this AD specifies otherwise. 

(i) Bombardier Service Bulletin 600–0780, 

dated December 29, 2022. 

(ii) Bombardier Service Bulletin 601–1112, 

Revision 01, dated February 23, 2023. 

(iii) Bombardier Service Bulletin 604–27– 

040, dated December 29, 2022. 

(iv) Bombardier Service Bulletin 605–27– 

011, dated December 29, 2022. 

(v) Bombardier Service Bulletin 650–27– 

004, dated December 29, 2022. 

(3) For service information identified in 

this AD, contact Bombardier Business 

Aircraft Customer Response Center, 400 CoˆteVertu 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 service information 

at the FAA, Airworthiness Products Section, 

Operational Safety Branch, 2200 South 216th 

St., Des Moines, WA. For information on the 

availability of this material at the FAA, call 

206–231–3195. 

(5) You may view this service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

email fr.inspection@nara.gov, or go to: 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued on August 22, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–19901 Filed 9–13–23; 8:45 am] 

BILLING CODE 4910–13–P 


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