Tail Strikes Ground 787 and A350 Composite Jets for Weeks While 777 Returns to Service Quicker

Modern widebody aircraft such as the Boeing 787 and Airbus A350 incorporate roughly 50% carbon-fiber composite materials by weight, a design choice that significantly reduces aircraft weight compared to older metal airframes. While this yields benefits like lower fuel consumption and enhanced corrosion resistance, the composite construction also introduces complexity when repairing impact damage such as tail strikes. In contrast, the Boeing 777, which uses predominantly traditional aluminum fuselage construction, can sometimes resume flying within days after a minor tail strike, given the damage is confined to external components like the tail skid.

A tail strike occurs when the rear fuselage contacts the runway during takeoff, landing, or go-around maneuvers—often due to excessive pitch angles, hard landings, or performance calculation errors. Damage can range from superficial dents and scrapes to structural harm affecting the pressurized rear fuselage. Damage to critical structures jeopardizing cabin pressurization must be meticulously assessed, since unrepaired impairments may worsen with repeated pressurization cycles, potentially compromising safety.

The primary challenge with composite structures stems from their damage characteristics. Unlike metal, where dents, cracks, or deformations are often visible indicators of structural compromise, composite materials can conceal internal damage such as fiber fractures, microcracks, or delamination beneath seemingly minor surface abrasions. Consequently, engineers cannot rely solely on a visual inspection and must employ advanced non-destructive testing methods like ultrasonic inspections, thermography, and radiography to accurately map the extent of damage.

These diagnostic processes are time-consuming and may involve coordination with aircraft manufacturers to interpret damage relative to structural repair manuals. Repairing a composite fuselage requires more involved techniques beyond patching metal panels: damaged composite layers are excised, replaced with carefully oriented new plies, and cured under controlled environmental conditions. The quality of repair hinges on strict adherence to procedures regarding humidity, temperature, material handling, and technician skill.

The upkeep of composite repair materials also adds logistical complexity as they often have limited shelf lives and require dedicated storage. This can necessitate transferring the aircraft to specialized maintenance facilities and prolonging downtime. In comparison, metal repairs—though still requiring expertise—can be faster, involving physical removal of damaged sections, metal patch installation, or panel replacement with mechanical fasteners.

Real-world incidents highlight these contrasts. After LATAM Airlines’ Boeing 777-300ER suffered a severe tail strike during takeoff at Milan Malpensa in July 2024, investigators noted that an incorrect weight input led to a low rotation speed and protracted tail contact. Despite the seriousness, the aircraft required significant but comparatively swift repairs due to the metal fuselage. Meanwhile, an Air France Airbus A350 sustained a tail strike during a go-around at Toronto Pearson in January 2024 and was grounded for nearly ten months due to the prolonged and complex repair process demanded by its composite structure.

Boeing incorporates physical tail skid systems on some 777 variants like the 777-300ER to mitigate tail strike impact severity, though modern software-based protections have reduced such events. Still, a tail strike is never trivial: if damage extends to primary pressure bulkheads or systems, even a metal aircraft can be out of service for extended periods. The difference lies in composite aircraft’s difficulty with damage assessment and repair, owing to hidden internal flaws and demanding repair protocols.

In sum, composite aircraft like the 787 and A350 embody advances to improve operational efficiency but trade off with increased maintenance complexity when structural damage occurs. Tail strikes, while relatively uncommon, expose how materials technology influences inspection and maintenance timelines. Airlines operating these aircraft must anticipate longer groundings and intricate repairs after rear fuselage impacts compared to older widebodies with metallic fuselages.