Federal Register / Vol. 89, No. 189 / Monday, September 30, 2024 / Rules and Regulations 79423 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the local flight standards district office/ 

certificate holding district office. 

(l) Related Information 

For more information about this AD, 

contact Joe Salameh, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; phone: (206) 231– 

3536; email: joe.salameh@faa.gov. 

(m) 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) European Union Aviation Safety Agency 

(EASA) AD 2022–0067, dated April 13, 2022. 

(ii) [Reserved] 

(3) For EASA material identified in this 

AD, contact EASA, Konrad-Adenauer-Ufer 3, 

50668 Cologne, Germany; phone: +49 221 

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

website: easa.europa.eu. You may find this 

EASA material on the EASA website at 

ad.easa.europa.eu. 

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

Office of the Regional Counsel, Southwest 

Region, 10101 Hillwood Parkway, Room 6N– 

321, Fort Worth, TX 76177. For information 

on the availability of this material at the 

FAA, call (817) 222–5110. 

(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 September 18, 2024. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2024–22349 Filed 9–27–24; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–1478; Project 

Identifier MCAI–2023–01216–T; Amendment 

39–22831; AD 2024–17–06] 

RIN 2120–AA64 

Airworthiness Directives; BAE 

Systems (Operations) Limited 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for all BAE 

Systems (Operations) Limited Model 

BAe 146 and Avro 146–RJ series 

airplanes. This AD was prompted by a 

report of cracking on the radius of the 

rib 0 forward longeron at a certain 

frame. This AD requires a one-time 

inspection for defects of the radius, and 

repair if necessary. The FAA is issuing 

this AD to address the unsafe condition 

on these products. 

DATES: This AD is effective November 4, 

2024. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of November 4, 2024. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2024–1478; 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 BAE Systems material 

identified in this AD, contact BAE 

Systems (Operations) Limited, Customer 

Information Department, Prestwick 

International Airport, Ayrshire, KA9 

2RW, Scotland, United Kingdom; 

telephone +44 1292 675207; fax +44 

1292 675704; email RApublications@

baesystems.com; website 

baesystems.com/en/our-company/ourbusinesses/regional-aircraft/about-us. 

• 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–2024–1478. 

FOR FURTHER INFORMATION CONTACT: 

Todd Thompson, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; 

telephone 206–231–3228; email 

todd.thompson@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 BAE Systems (Operations) 

Limited Model BAe 146 and Avro 146– 

RJ series airplanes. The NPRM 

published in the Federal Register on 

June 6, 2024 (89 FR 48348). The NPRM 

was prompted by AD G–2023–0006, 

dated November 24, 2023 (referred to 

after this as the MCAI), issued by the 

Civil Aviation Authority (CAA), which 

is the aviation authority for the United 

Kingdom (UK). The MCAI states that an 

operator reported that during routine 

maintenance, cracking was found on the 

radius of the rib 0 forward longeron at 

frame 26. The cracking initiated close to 

a local blend in the radius. Failure of 

the rib 0 forward longeron could lead to 

structural failure of adjacent structure, 

leading to failure of the fuselage skin, 

and could result in rapid decompression 

and possible loss of the airplane. 

In the NPRM, the FAA proposed to 

require a one-time inspection for defects 

of the radius, and repair if necessary. 

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–2024–1478. 

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 BAE Systems 

(Operations) Limited Inspection Service 

Bulletin ISB.53–249, dated August 25, 

2023. This material specifies procedures 

for performing a detailed inspection for 

any defects (rough edges, nicks, or 

visible cracking) and for any evidence of 

blending or undercutting of the radius 

and flanges of the rib 0 forward 

longeron at frame 26, performing a high 

frequency eddy current (HFEC) 

inspection of the radius of the rib 0 

forward longeron at frame 26, and 

obtaining and following repair 

instructions. This material is reasonably 

available because the interested parties 


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79424 Federal Register / Vol. 89, No. 189 / Monday, September 30, 2024 / Rules and Regulations 

have access to it through their normal 

course of business or by the means 

identified in the ADDRESSES section. 

Interim Action 

The FAA considers that this AD is 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 20 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 

2 work-hours × $85 per hour = $170 .......................................................................................... $0 $170 $3,400 

The FAA has received no definitive 

data on which to base the cost estimates 

for the on-condition repairs specified in 

this AD. 

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: 

2024–17–06 BAE Systems (Operations) 

Limited: Amendment 39–22831; Docket 

No. FAA–2024–1478; Project Identifier 

MCAI–2023–01216–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective November 4, 2024. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all BAE Systems 

(Operations) Limited airplanes identified in 

paragraphs (c)(1) and (2) of this AD, 

certificated in any category. 

(1) Model BAe 146–100A, –200A, and 

–300A airplanes. 

(2) Model Avro 146–RJ70A, –RJ85A, and 

–RJ100A airplanes. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 53, Fuselage. 

(e) Unsafe Condition 

This AD was prompted by a report of 

cracking on the radius of the rib 0 forward 

longeron at frame 26. The FAA is issuing this 

AD to address cracking of the radius of the 

rib 0 forward longeron at frame 26. The 

unsafe condition, if not addressed, could 

result in failure of the rib 0 forward longeron, 

which could lead to failure of an adjacent 

structure, leading to failure of the fuselage 

skin, and could result in rapid 

decompression and possible loss of the 

airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Inspection and Corrective Actions 

Within 4 months after the effective date of 

this AD, do a visual and a high frequency 

eddy current inspection for defects of the 

radius of the rib 0 forward longeron at frame 

26, in accordance with the Accomplishment 

Instructions of BAE Systems (Operations) 

Limited Inspection Service Bulletin ISB.53– 

249, dated August 25, 2023. If any cracking 

or defects are found, repair before further 

flight, in accordance with a method approved 

by the Manager, International Validation 

Branch, FAA; or the United Kingdom Civil 

Aviation Authority (UK CAA); or BAE 

Systems (Operations) Limited’s UK CAA’s 

Design Organization Approval (DOA). If the 

method is approved by the DOA, the 

approval must include the DOA-authorized 

signature. 

(h) Reporting Requirement 

Report positive inspection results at the 

applicable time specified in paragraph (h)(1) 

or (2) of this AD using the Inspection Report 

form in Appendix 1 of BAE Systems 

(Operations) Limited Inspection Service 

Bulletin ISB.53–249, dated August 25, 2023. 

(1) If the inspection was done on or after 

the effective date of this AD: Submit the 

report within 30 days after the inspection. 

(2) If the inspection was done before the 

effective date of this AD: Submit the report 

within 30 days after the effective date of this 

AD. 

(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: AMOC@faa.gov. Before using any 

approved AMOC, notify your appropriate 


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Federal Register / Vol. 89, No. 189 / Monday, September 30, 2024 / Rules and Regulations 79425 

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 the UK CAA; or BAE 

Systems (Operations) Limited’s UK CAA’s 

DOA. If approved by the DOA, the approval 

must include the DOA-authorized signature. 

(j) Additional Information 

For more information about this AD, 

contact Todd Thompson, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 206– 

231–3228; email todd.thompson@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) BAE Systems (Operations) Limited 

Inspection Service Bulletin ISB.53–249, 

dated August 25, 2023. 

(ii) [Reserved] 

(3) For BAE Systems material identified in 

this AD, contact BAE Systems (Operations) 

Limited, Customer Information Department, 

Prestwick International Airport, Ayrshire, 

KA9 2RW, Scotland, United Kingdom; 

telephone +44 1292 675207; fax +44 1292 

675704; email RApublications@

baesystems.com; website baesystems.com/ 

en/our-company/our-businesses/regionalaircraft/about-us. 

(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 August 22, 2024. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2024–22319 Filed 9–27–24; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–2316; Project 

Identifier MCAI–2024–00381–G; Amendment 

39–22854; AD 2024–19–12] 

RIN 2120–AA64 

Airworthiness Directives; DG Aviation 

GmbH (Type Certificate Previously 

Held by DG Flugzeugbau GmbH) 

Gliders 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule; request for 

comments. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

DG Aviation GmbH (type certificate 

previously held by DG Flugzeugbau 

GmbH) Model DG–400 gliders and all 

Model DG–500 Elan Orion, DG–500 

Elan Trainer, DG–500/20 Elan, DG–500/ 

22 Elan, DG–500M, DG–500MB, DG– 

800A, DG–800B, DG–808C, DG–1000M, 

DG–1000S, and DG–1000T gliders. This 

AD was prompted by a report of a 

broken rod end at the upper end of the 

elevator pushrod in the fin (vertical tail) 

of a DG Aviation GmbH Model DG–300 

glider. Depending on the glider model, 

this AD requires revising your existing 

glider maintenance manual to 

incorporate new procedures for elevator 

control circuit free play adjustment, 

performing an operational check of the 

free play adjustment of the automatic 

elevator hook-up, accomplishing 

corrective actions as required, and 

replacing the elevator pushrod end with 

a new part. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 

DATES: This AD is effective October 15, 

2024. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of October 15, 2024. 

The FAA must receive comments on 

this AD by November 14, 2024. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

regulations.gov. Follow the instructions 

for submitting comments. 

• Fax: (202) 493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE, 

Washington, DC 20590. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2024–2316; 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 street address for 

Docket Operations is listed above. 

Material Incorporated by Reference: 

• For DG Aviation GmbH material 

identified in this AD, contact DG 

Aviation GmbH, Otto-Lilienthal Weg 2/ 

Am Flugplatz, 76646 Bruchsal, 

Germany; phone: +49 (0) 7251 36660– 

32; email: info@dg-aviation.de; website: 

dg-aviation.de/en/dg-flugzeugbau/ 

contact. 

• You may view this material at the 

FAA, Airworthiness Products Section, 

Operational Safety Branch, 901 Locust, 

Kansas City, MO 64106. For information 

on the availability of this material at the 

FAA, call (817) 222–5110. It is also 

available at regulations.gov under 

Docket No. FAA–2024–2316. 

FOR FURTHER INFORMATION CONTACT: Fred 

Guerin, Aviation Safety Engineer, FAA, 

1600 Stewart Avenue, Suite 410, 

Westbury, NY 11590; phone: (206) 231– 

2346; email: fred.guerin@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

The FAA invites you to send any 

written data, views, or arguments about 

this final rule. Send your comments to 

an address listed under ADDRESSES. 

Include ‘‘Docket No. FAA–2024–2316; 

Project Identifier MCAI–2024–00381–G’’ 

at the beginning of your comments. The 

most helpful comments reference a 

specific portion of the final rule, explain 

the reason for any recommended 

change, and include supporting data. 

The FAA will consider all comments 

received by the closing date and may 

amend this final rule because of those 

comments. 

Except for Confidential Business 

Information (CBI) as described in the 

following paragraph, and other 

information as described in 14 CFR 

11.35, the FAA will post all comments 

received, without change, to 

regulations.gov, including any personal 

information you provide. The agency 

will also post a report summarizing each 

substantive verbal contact received 

about this final rule. 


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