US airline reports flag smoke, gear & pressurisation

Global Work & Travel has published an analysis of US aircraft service reports. It found that smoke, landing gear and pressurisation were among the issues mentioned in filings to the Federal Aviation Administration.

The company examined 36,974 Service Difficulty Reports submitted between 1 January and 21 August. It noted that the records cover malfunctions, defects and maintenance findings, not just in-flight incidents involving passengers.

The analysis identified 751 reports that mentioned smoke, 526 that referred to landing gear and 387 that referenced fire or flames. Another 325 mentioned pressurisation or cabin pressure, 319 referred to hydraulic systems and 75 mentioned an engine shutdown.

Doors were the most commonly mentioned item, appearing in 7,637 reports. The dataset also included 287 references to a burning smell or odour, 289 mentions of emergency-declared or emergency-landing terminology and 109 mentions of oxygen masks or oxygen equipment.

The figures do not represent the number of fires, emergency landings or flights affected. A single Service Difficulty Report can record a warning indication, a defect discovered during inspection or a maintenance finding on the ground, and one report can fall into more than one category.

Structural findings

Conditions linked to wear and damage appeared far more often than the more eye-catching issues. Corrosion was recorded in 7,429 reports, while cracking appeared in 6,468.

A further 2,693 records listed a part as inoperative, 2,194 described a part as damaged and 1,612 marked a part as faulted. On that basis, smoke accounted for about 2% of the reports analysed, while engine shutdowns represented about 0.2%.

The analysis also reviewed the operator listed against each filing. Among the large US passenger airlines covered, American Airlines recorded the highest number of reports in the period, with 6,761, followed by Southwest Airlines with 5,934, Delta Air Lines with 4,488 and United Airlines with 3,568.

Other operators in the dataset included SkyWest Airlines with 1,309 reports, PSA Airlines with 1,044, Mesa Airlines with 739, JetBlue with 727, Endeavor Air with 719, Piedmont Airlines with 673 and Alaska Airlines with 619.

Those totals should not be read as a safety ranking, as airlines vary in fleet size, flight numbers, aircraft types, fleet age, maintenance programmes and reporting practices.

Airline differences

The types of issues appearing most often also varied by operator. Among the major passenger airlines in the analysis, United had the highest number of reports mentioning smoke, with 247, compared with 91 for Delta and 74 for American.

American recorded the highest number of reports mentioning landing gear, at 108. Delta had the highest number of references to an engine shutdown, with 14.

The records used in the analysis come from the Federal Aviation Administration's Service Difficulty Reporting System, which is designed to document aircraft malfunctions, failures, defects and maintenance findings. Multiple reports can relate to the same aircraft or event, so report totals cannot be treated as counts of separate flights or aircraft.

That distinction matters because technical references in regulatory filings can sound alarming without showing whether passengers were directly affected. A smoke reference, for example, may relate to a warning indication or an issue identified during maintenance rather than smoke in the cabin during a flight.

Jürgen Himmelmann, Co-founder and Chief Executive, Global Work & Travel, addressed that point in comments released alongside the findings. "Some of these figures can sound worrying when they're taken out of context, particularly if you're already a nervous flyer, but that's not really what this data tells us. Aircraft are subject to extensive checks and maintenance, and issues being identified, documented and addressed are an important part of how the aviation industry operates," Himmelmann said.

He also commented on what travellers should do when a technical issue disrupts a journey. "For travellers, the more useful takeaway is knowing what to do when a technical issue causes a delay, cancellation or diversion, particularly if you're travelling long-haul and have other bookings relying on you arriving at a certain time. Keep any communication you receive from your airline and hold onto receipts if you have to pay for food, accommodation or alternative transport because of disruption. It's also worth building some breathing room into important connections. If you've booked separate flights, a delay to the first flight could leave you responsible for rearranging the next one. For longer trips, working holidays and gap years, we'd also recommend having appropriate travel insurance in place from the point you start making significant bookings. One disrupted flight can have a knock-on effect on accommodation, transfers, tours and other parts of your trip," Himmelmann said.