The FAA is adopting a new airworthiness directive (AD) for all Airbus SAS Model A330-841 and Model A330-941 airplanes. This AD was prompted by reports of crack findings on the s...
[Docket No. FAA-2026-4639; Project Identifier MCAI-2025-01360-T; Amendment 39-23422; AD 2026-15-10]
RIN 2120-AA64
AGENCY:
Federal Aviation Administration (FAA), DOT.
ACTION:
Final rule.
SUMMARY:
The FAA is adopting a new airworthiness directive (AD) for all Airbus SAS Model A330-841 and Model A330-941 airplanes. This AD was prompted by reports of crack findings on the sloping rib. This AD requires a repetitive inspection of the external surface of each sloping rib and each slat 1 inboard seal, and applicable corrective actions. The FAA is issuing this AD to address the unsafe condition on these products.
DATES:
This AD is effective September 3, 2026.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of September 3, 2026.
ADDRESSES:
AD Docket:
You may examine the AD docket at
regulations.gov
under Docket No. FAA-2026-4639; 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 European Union Aviation Safety Agency (EASA) material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; emailADs@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 atregulations.gov
under Docket No. FAA-2026-4639.
FOR FURTHER INFORMATION CONTACT:
Bill Ashforth, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 206-231-3520; email:
Bill.ashforth@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 Airbus SAS Model A330-841 and Model A330-941 airplanes. The NPRM was published in the
Federal Register
on May 20, 2026 (91 FR 29389). The NPRM was prompted by EASA AD 2025-0179, dated August 13, 2025 (EASA AD 2025-0179) (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 occurrences of crack findings on the sloping rib were reported. This condition, if not addressed, could affect the handling qualities of the airplane, which could result in reduced controllability of the airplane.
In the NPRM, the FAA proposed to require a repetitive inspection of the external surface of each sloping rib and each slat 1 inboard seal, and applicable corrective actions, as specified in EASA AD 2025-0179. The FAA is issuing this AD to address the unsafe condition on these products.
( printed page 47939)
You may examine the MCAI in the AD docket at
regulations.gov
under Docket No. FAA-2026-4639.
Discussion of Final Airworthiness Directive
Comments
The FAA received a comment from the Air Line Pilots Association, International (ALPA) who supported the NPRM without change.
Conclusion
These products have been approved by the civil aviation authority of another country and are approved for operation in the United States. Pursuant to the FAA's bilateral agreement with this State of Design Authority, that authority has notified the FAA of the unsafe condition described in the MCAI referenced above. The FAA reviewed the relevant data, considered any comments received, and determined that air safety requires adopting this AD as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on these products. 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 2025-0179 specifies procedures for repetitive general visual inspection of the external surface of each left-hand (LH) and right-hand (RH) sloping rib for damage (which includes cracking, dents, and corrosion) and each LH and RH slat 1 inboard seal for damaged and missing seals, and applicable corrective actions. Corrective actions include contacting Airbus for repair instructions and doing the repair, and replacing or reinstalling any damaged or missing seal. EASA AD 2025-0179 also specifies procedures for an alternative method of compliance for any repetitive inspection by accomplishing a certain inspection or replacement.
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 37 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
$3,145
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:
(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.
This airworthiness directive (AD) is effective September 3, 2026.
(b) Affected ADs
None.
(c) Applicability
This AD applies to all Airbus SAS Model A330-841 and Model A330-941 airplanes.
(d) Subject
Air Transport Association (ATA) of America Code 57, Wings.
(e) Unsafe Condition
This AD was prompted by reports of crack findings on the sloping rib. The FAA is issuing this AD to address cracking on the sloping rib. The unsafe condition, if not addressed, could affect the handling qualities of the airplane, which could result in reduced controllability of the airplane.
(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, European Union Aviation Safety Agency (EASA) AD 2025-0179, dated August 13, 2025 (EASA AD 2025-0179).
(h) Exceptions to EASA AD 2025-0179
(1) Where EASA AD 2025-0179 refers to its effective date, this AD requires using the effective date of this AD.
(2) Where paragraph (2) of EASA AD 2025-0179 specifies “If any damage is found on a
( printed page 47940)
sloping rib, before next flight, contact Airbus for approved repair instructions and, within the compliance time specified therein, accomplish those instructions accordingly”, this AD requires replacing that text with “If any cracking is detected on a sloping rib during any inspection required by this AD, the cracking must be repaired before further flight using a method approved by the Manager, AIR-520, Continued Operational Safety 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. If any damage other than cracking is detected on a sloping rib during any inspection required by this AD, before next flight, contact Airbus for approved instructions and, within the compliance time identified therein, accomplish those instructions accordingly.”
(3) This AD does not adopt the “Remarks” section of EASA AD 2025-0179.
(i) Additional AD Provisions
The following provisions also apply to this AD:
(1)
Alternative Methods of Compliance (AMOCs):
The Manager, AIR-520, Continued Operational Safety Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (j) of this AD and email 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, Continued Operational Safety Branch, FAA; or EASA; or Airbus SAS's EASA DOA. If approved by the DOA, the approval must include the DOA-authorized signature.
(3)
Required for Compliance (RC):
Except as required by paragraph (i)(2) of this AD, if any material referenced in EASA AD 2025-0179 contains paragraphs that are labeled as RC, the instructions in RC paragraphs, including subparagraphs under an RC paragraph, must be done to comply with this AD; any paragraphs, including subparagraphs under those paragraphs, that are not identified as RC are recommended. The instructions in paragraphs, including subparagraphs under those paragraphs, not identified as RC may be deviated from using accepted methods in accordance with the operator's maintenance or inspection program without obtaining approval of an AMOC, provided the instructions identified as RC can be done and the airplane can be put back in an airworthy condition. Any substitutions or changes to instructions identified as RC require approval of an AMOC.
(j) Additional Information
For more information about this AD, contact Bill Ashforth, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 206-231-3520; email:
Bill.ashforth@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) European Union Aviation Safety Agency (EASA) AD 2025-0179, dated August 13, 2025.
(ii) [Reserved]
(3) For EASA material identified in this AD, 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 this material on the EASA website at
ad.easa.europa.eu.
(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.
Use this for formal legal and research references to the published document.
91 FR 47938
Web Citation
Suggested Web Citation
Use this when citing the archival web version of the document.
“Airworthiness Directives; Airbus SAS Airplanes,” thefederalregister.org (July 30, 2026), https://thefederalregister.org/documents/2026-15410/airworthiness-directives-airbus-sas-airplanes.