Iranian Boeing 737 Suffers Severe Vibrations, Cabin Ceiling Panels Come Loose

September 15, 2026 — Mashhad, Iran

A Boeing 737-300 operated by Sepehran Airlines experienced severe vibrations during a flight from Mashhad to Kermanshah, forcing the aircraft to return to Mashhad.

Videos recorded inside the aircraft show passengers experiencing intense shaking as several cabin ceiling panels and overhead compartments became dislodged. Some passengers were seen holding the loose panels in place as the aircraft returned to the airport.

Technical Problem During Takeoff

The aircraft reportedly experienced a problem involving one of its landing-gear tires during takeoff. Initial reports described the event as a tire failure, while technical information later indicated that part of the tire tread had separated.

The incident was followed by severe vibrations affecting the aircraft. The flight crew decided to return to Mashhad rather than continue to Kermanshah.

Possible Landing-Gear Shimmy

One of the key technical aspects of the incident is the reported involvement of the landing gear's shimmy damping system.

Shimmy is an unstable oscillatory movement that can occur in aircraft landing-gear wheels. If not properly damped, these oscillations can generate significant vibration and place additional loads on landing-gear components and tires.

Reports citing preliminary Iranian aviation findings indicate that the shimmy damper was affected by issues including leakage, wear and corrosion. These conditions were associated with abnormal vibrations and subsequent damage to landing-gear components and the tire.

Why Did the Cabin Ceiling Panels Come Loose?

The dramatic cabin footage does not necessarily indicate structural failure of the aircraft.

The passenger cabin contains numerous interior panels, overhead compartments and other components that are separate from the primary load-bearing structure of the fuselage. Severe vibration can cause these interior components to become detached from their mounting points.

In this case, the intensity of the vibration appears to have been sufficient to dislodge several cabin panels and overhead components.

Safe Return to Mashhad

Despite the severity of the vibration, the aircraft returned safely to Mashhad and the passengers were evacuated.

No fatalities or injuries were reported in connection with the incident. Passengers were subsequently transported to Kermanshah on another aircraft.

Why the Incident Matters

The event demonstrates how a relatively localized mechanical problem involving the landing gear can produce effects throughout an aircraft.

A possible sequence can be summarized as:

Landing-gear damping problem → abnormal shimmy → excessive vibration → tire/landing-gear damage → vibration transmitted through the aircraft → cabin interior components becoming dislodged

The exact sequence and contributing factors remain subject to the official investigation.

Conclusion

The Sepehran Airlines Boeing 737-300 was not involved in a crash or loss-of-control accident. The aircraft experienced severe mechanical vibrations during the flight and returned safely to Mashhad.

The incident nevertheless highlights the importance of landing-gear inspection, shimmy-damping systems and the potential consequences of abnormal vibration on both aircraft components and cabin equipment.