Hawaiian Airlines grounded its A321neo aircraft in September 2024 after discovering structural cracks in the fuselage

Hawaiian Airlines discovered hairline cracks in the fuselage — the main body of the plane — on multiple Airbus A321neo jets. The airline when ready removed these aircraft from service and inspected its entire A321neo fleet. The cracks appeared in an area where the fuselage connects to the wing, a high-stress point on the aircraft. This was not an emergency landing situation; the issue was found during routine maintenance checks.

The A321neo is a newer, fuel-efficient aircraft that Hawaiian Airlines had been using on longer routes. The airline had ordered 16 of these planes as part of a fleet modernization plan. When the cracks were discovered, Hawaiian Airlines worked with Airbus and federal aviation authorities to determine whether the planes could return to service and under what conditions.

Key Takeaways

  • Hawaiian Airlines discovered structural cracks in the fuselage of multiple A321neo aircraft during scheduled maintenance in September 2024.
  • The cracks were found in a high-stress area where the fuselage connects to the wing, not in an area that posed when ready danger to passengers already in flight.
  • The airline grounded its A321neo fleet while inspecting all planes and working with Airbus and the Federal Aviation Administration on a solution.
  • Passengers whose flights were cancelled due to the grounding were rebooked on other Hawaiian Airlines aircraft or offered refunds.

How the cracks were discovered and what they looked like

The cracks were found during scheduled maintenance inspections, not reported by pilots or passengers during flight. Maintenance crews use visual inspections and sometimes specialized equipment to look for signs of metal fatigue or stress on aircraft. The cracks in the A321neo were small hairline fractures — not large breaks — but they appeared in multiple planes, which signaled a potential design or manufacturing issue rather than isolated wear.

Because the cracks appeared in the same location on different aircraft, investigators suspected the problem was related to how Airbus designed or built that section of the fuselage, rather than something that happened during Hawaiian Airlines' operation of the planes. This type of pattern is what prompts manufacturers and regulators to look at the entire fleet of that aircraft model.

Why this area of the plane is important

The fuselage is the tube-shaped body that holds passengers, cargo, and fuel. It experiences constant stress during flight — pressure from the air outside, the weight of everything inside, and the forces created when the plane climbs, descends, and turns. The connection between the fuselage and the wing is one of the highest-stress areas because it has to transfer the weight of the entire aircraft to the wings.

Cracks in this area are taken seriously because they can grow over time if the plane continues to fly. A small crack that is ignored might become larger, potentially affecting the structural integrity of the aircraft. This is why airlines and regulators err on the side of caution: if cracks are found, the planes are grounded until engineers understand the problem and determine whether they can be repaired safely.

What happened to flights and passengers

When Hawaiian Airlines grounded the A321neo fleet, the airline had to cancel or reschedule flights that were supposed to use those planes. Passengers on cancelled flights were rebooked on other Hawaiian Airlines aircraft — typically larger planes like the Boeing 717 or Airbus A330 — or offered refunds. Because Hawaiian Airlines is a smaller carrier focused on routes between Hawaii and the mainland, the airline had limited spare capacity, which meant some passengers experienced delays in reaching their destinations.

The grounding lasted several weeks while Airbus, Hawaiian Airlines, and the Federal Aviation Administration worked on an inspection and repair plan. During this time, the airline operated with a reduced fleet on some routes. Passengers who had booked flights during this period were notified of changes and given options to rebook or cancel without penalty.

The investigation and what regulators found

The Federal Aviation Administration (FAA) oversees aircraft safety in the United States. When Hawaiian Airlines reported the cracks, the FAA worked with Airbus to determine whether the problem affected only Hawaiian Airlines' planes or the entire A321neo fleet worldwide. Airbus issued inspection directives telling all airlines operating the A321neo to check the same area on their aircraft.

Airbus engineers investigated the manufacturing process and the design of the fuselage section where the cracks appeared. The investigation looked at whether the issue was a flaw in how the planes were built at the factory, a design weakness that only showed up after a certain number of flight hours, or something related to how the aircraft were being used. Based on the findings, Airbus developed a repair procedure and inspection schedule.

How the planes returned to service

After the investigation, Airbus provided Hawaiian Airlines and other operators with a repair procedure. The repairs involved reinforcing the cracked area or replacing the affected section of the fuselage. Hawaiian Airlines inspected all of its A321neo aircraft, repaired any that showed cracks or signs of stress, and implemented a more frequent inspection schedule for that area going forward.

The FAA had to approve the repair procedure before planes could return to service. Once approved, Hawaiian Airlines began bringing its A321neo fleet back into operation on a schedule. The airline also had to may support that maintenance crews were trained on the new inspection procedures and knew what to look for during routine checks.

What this means for future flights

The A321neo remains in service with Hawaiian Airlines and many other airlines worldwide. The discovery of the cracks and the subsequent repairs and inspections are part of how aviation safety works: problems are found, investigated, fixed, and monitored. Airlines and manufacturers use data from one incident to prevent similar problems on other aircraft.

For passengers, this incident illustrates why aircraft are grounded when structural issues are found. The grounding is inconvenient, but it is the mechanism that keeps flying safe. Modern aircraft are inspected constantly, and when something unusual is discovered, the response is to stop flying until the problem is understood and fixed — not to keep operating and hope nothing goes wrong.

Frequently Asked Questions

Was there ever a safety risk to passengers already on these planes?

The cracks were discovered during maintenance on the ground, not during flight. While the cracks were in a high-stress area, they were small and were caught before they could grow large enough to pose an when ready danger. The grounding was a precautionary measure to prevent potential problems, not a response to an emergency.

Did this problem happen on A321neo planes operated by other airlines?

The FAA and Airbus issued inspection directives to all airlines operating the A321neo, which means other carriers checked their aircraft for the same issue. Some other airlines found similar cracks and performed repairs. The problem was not unique to Hawaiian Airlines but appeared to be a fleet-wide issue with that aircraft model.

How long did it take for Hawaiian Airlines to fix the planes and return them to service?

The grounding lasted several weeks while inspections and repairs were completed. The exact timeline depended on how many planes needed repairs and how long each repair took. Once the FAA approved the repair procedure, planes were brought back into service gradually as they completed inspections and any necessary work.

Can I see inspection records for Hawaiian Airlines' A321neo planes before I book a flight?

Detailed maintenance records are not public information. However, the FAA maintains oversight of all airlines and aircraft operating in the United States. If you have concerns about a specific aircraft or airline, you can contact Hawaiian Airlines directly or review publicly available safety data from the FAA and the National Transportation Safety Board.

Will Hawaiian Airlines keep using the A321neo after this incident?

Yes. The A321neo is a relatively new aircraft model, and the issue was addressed through repairs and enhanced inspections. Hawaiian Airlines continues to operate its A321neo fleet with the new inspection and maintenance procedures in place. The aircraft remains in service with the airline and many others worldwide.