Quick Answers
What does FAA AD 2026-15-10 require for A330neo operators?
FAA AD 2026-15-10, effective September 3, 2026, requires repetitive general visual inspection of each wing sloping rib external surface and each slat 1 inboard seal on all Airbus A330-841 and A330-941 aircraft. Cracking found on any sloping rib must be repaired before further flight. Thirty-seven US-registered airplanes are affected.
Does the A330neo wing rib AD also apply to the A330ceo?
No. FAA AD 2026-15-10 applies only to the Airbus A330-841 and A330-941 (A330neo). The A330ceo family (A330-200 and A330-300 series) is not in scope. A separate AD (2026-15-01) covers certain A330ceo aircraft for an unrelated ETOPS crew oxygen issue.
Quick Compliance Summary
| Regulatory body | Federal Aviation Administration (FAA) |
| AD number | 2026-15-10 — Amendment 39-23422 |
| Docket | FAA-2026-4639 |
| Aircraft affected | All Airbus A330-841 and A330-941 (A330neo) |
| Issue | Cracking found on the wing sloping rib |
| Required action | Repetitive general visual inspection (GVI) of each sloping rib external surface and each slat 1 inboard seal. On-condition corrective actions |
| Compliance deadline | September 3, 2026 |
| US fleet affected | 37 airplanes |
| Cost per aircraft | $85 (1 work-hour) for base inspection; on-condition repair costs not estimated |
| Source | Federal Register Vol. 91, No. 145, July 30, 2026 — FR Doc 2026-15410 |
Who Should Read This
This update is directly relevant to:
- Continuing Airworthiness Managers (CAMs) for A330neo fleets
- Directors of Maintenance
- MRO Planning Teams scheduling A330neo maintenance
- Quality Managers at Part 145 organizations with A330neo capability
- Structural repair engineers
This AD applies only to the A330neo. The A330ceo family (A330-200 and A330-300 series) is not in scope. If you also track the A330ceo ETOPS oxygen AD (Article 40), note that these are two separate ADs on two separate variant families with different compliance requirements.
At a Glance
| Item | Details |
|---|---|
| AD Number | 2026-15-10 |
| Amendment | 39-23422 |
| Docket | FAA-2026-4639 |
| ATA Code | 57 — Wings |
| Aircraft | All A330-841 and A330-941 |
| Effective Date | September 3, 2026 |
| Required Action | Repetitive GVI of each LH and RH sloping rib + each LH and RH slat 1 inboard seal |
| Unsafe Condition | Cracking on sloping rib → affected handling qualities → reduced controllability |
| On-condition (cracking) | Repair before further flight |
| On-condition (other damage) | Contact Airbus for instructions; accomplish within compliance time |
| Originating authority | EASA AD 2025-0179, August 13, 2025 |
| US fleet affected | 37 airplanes |
| ALPA support | Supported without change |
What Changed
The FAA published AD 2026-15-10 on July 30, 2026. It is effective September 3, 2026.
The AD adopts EASA AD 2025-0179, dated August 13, 2025, as its basis. Multiple occurrences of cracking on the wing sloping rib were reported on A330neo aircraft in service. EASA assessed the risk and issued the MCAI. The FAA reviewed the data and adopted the AD for US-registered aircraft.
ALPA supported the NPRM without change. No other comments were received.
Why It Matters
The sloping rib is a structural component of the wing leading-edge assembly. It connects the leading edge to the main wing box structure. Cracks in this component affect how loads transfer between the leading edge and the wing.
The consequence is not subtle. The FAA states directly that cracking on the sloping rib could affect the airplane’s handling qualities, resulting in reduced controllability.
Reduced controllability means the flight controls do not respond as designed. In certain flight conditions — high angles of attack, turbulence, gusty crosswinds — the difference between designed handling and degraded handling is the margin between a safe flight and a loss-of-control event.
This is a structural integrity issue with direct implications for flight control. It is not a cosmetic or maintenance-convenience item.
Who Is Affected
All Airbus A330-841 and A330-941 airplanes, certificated in any category.
| Model | Engine | Typical operator context |
|---|---|---|
| A330-841 | Rolls-Royce Trent 7000 | Medium/long-haul, typically lower-density configurations |
| A330-941 | Rolls-Royce Trent 7000 | Long-haul, higher-capacity configurations |
There are no serial number exceptions. All A330neo aircraft are in scope.
37 US-registered airplanes are affected. The global A330neo fleet is larger and continues to grow. Non-US operators are subject to EASA AD 2025-0179 directly or through their national authority’s adoption.
The A330ceo family (A330-200 and A330-300 series) is not covered by this AD.
Required Action
Comply with EASA AD 2025-0179, subject to the FAA’s exceptions below.
Inspection: Perform a repetitive general visual inspection (GVI) of:
- The external surface of each left-hand (LH) and right-hand (RH) sloping rib — check for cracking, dents, and corrosion
- Each LH and RH slat 1 inboard seal — check for damaged or missing seals
The inspection must be repeated at the intervals specified in EASA AD 2025-0179.
On-condition — cracking found: If cracking is detected on a sloping rib, the cracking must be repaired before further flight. The repair must use a method approved by the FAA Manager (AIR-520), EASA, or Airbus SAS’s EASA DOA with DOA-authorized signature.
On-condition — other damage found: If damage other than cracking is found on a sloping rib (dents, corrosion), contact Airbus for approved instructions before next flight. Follow the instructions within the compliance time specified by Airbus.
On-condition — seal damage: If the 1 inboard slat seal is damaged or missing, replace or reinstall the seal per the procedures in EASA AD 2025-0179.
Alternative terminating action: EASA AD 2025-0179 provides an alternative method of compliance—performing a specific inspection or replacement—that can terminate the repetitive GVI cycle. Refer to the EASA AD for the specific procedure.
FAA Exceptions to EASA AD 2025-0179
The FAA modified the EASA AD in two ways.
First: While EASA AD 2025-0179 refers to its own effective date, the FAA AD requires use of the FAA effective date of September 3, 2026.
Second: The EASA AD’s crack repair instructions say, “Contact Airbus for approved repair instructions.” The FAA replaced this with a more specific requirement: cracking must be repaired before further flight using a method approved by the FAA Manager (AIR-520), EASA, or the Airbus DOA. This gives operators three approval pathways for crack repair, rather than requiring contact with Airbus as the sole route.
The FAA did not adopt the “Remarks” section of EASA AD 2025-0179.
Operational Impact
The base inspection cost is minimal — $85 per aircraft (1 work-hour at $85/hour). Total US fleet cost: $3,145.
The real cost risk is in on-condition findings. If cracking is detected, repair is required before further flight. The FAA has no definitive data on repair costs — they depend on the extent and location of the cracking. Structural repairs on wing components can be significant in both cost and downtime.
For MRO planning teams: add the sloping rib and slat 1 inboard seal GVI to the recurring inspection work scope for all A330neo aircraft. Track inspection intervals by tail number.
The repetitive nature of this AD means it generates an ongoing maintenance task for the life of the aircraft — unless the alternative terminating action (specified in EASA AD 2025-0179) is accomplished.
Key Dates
| Event | Date |
|---|---|
| EASA AD 2025-0179 issued | August 13, 2025 |
| NPRM published | May 20, 2026 |
| FAA AD 2026-15-10 published | July 30, 2026 |
| AD effective date | September 3, 2026 |
Source Documents
- Federal Register Vol. 91, No. 145, July 30, 2026 — FR Doc 2026-15410
- EASA AD 2025-0179, August 13, 2025 — available at ad.easa.europa.eu
- AD Docket: regulations.gov, Docket No. FAA-2026-4639
- FAA contact: Bill Ashforth — Bill.Ashforth@faa.gov, 206-231-3520
Airbus A330neo Wing Sloping Rib Cracking: FAQ
Does this AD apply to the A330ceo (A330-200/A330-300)?
No. This AD applies only to the A330-841 and A330-941 — the A330neo variants. The A330ceo family is not in scope. The A330ceo ETOPS oxygen AD (2026-15-01) is a separate directive on a separate variant family.
What is the sloping rib?
The sloping rib is a structural component of the wing leading-edge assembly. It provides the structural connection between the leading edge and the main wing box. Cracks in this component affect how aerodynamic and structural loads are transferred through the wing.
How does cracking on the sloping rib affect controllability?
Cracking degrades the structural integrity of the wing leading-edge assembly. This can alter the aerodynamic behavior of the wing, affecting handling qualities — how the aircraft responds to control inputs, particularly at critical flight phases.
What happens if cracking is found during inspection?
Repair before further flight. The repair must use a method approved by the FAA Manager (AIR-520), EASA, or Airbus’s EASA DOA. Three approval pathways are available.
Is there a way to terminate the repetitive inspection cycle?
Yes. EASA AD 2025-0179 specifies an alternative method of compliance — a certain inspection or replacement — that can serve as a terminating action. Refer to the EASA AD for the specific procedure.
How many aircraft are affected?
37 US-registered A330neo airplanes. The global A330neo fleet is larger. Non-US operators are subject to EASA AD 2025-0179 or their national authority’s equivalent.
Related Reading:
- FAA AD 2026-15-01: Airbus A330 ETOPS-180 Crew Oxygen Limitation
- FAA AD 2026-15-13: Airbus A319/A320/A321 NEO Family — HPV Butterfly Seal Clip Repetitive Replacement Now Required
aviationregwatch.com publishes regulatory intelligence for aviation compliance professionals. This article is an informational summary, not legal or airworthiness advice. Consult your aircraft manufacturer, CAMO, or legal counsel for compliance decisions.