What happened
During the final approach phase at Daegu Airport, the flight crew neglected to complete the required approach checklist, which resulted in the landing gear remaining retracted. Although a cockpit warning alarm was triggered to alert the crew of the configuration error, the crew mistakenly identified the alert as a malfunction. To silence the warning, the crew pulled the associated circuit breaker.
As the aircraft continued its descent, the three landing gear indicators remained illuminated in red, signaling that the gear was not locked down. However, the crew did not verify these lights and proceeded with the landing. The aircraft type (unspecified) subsequently struck the runway on its belly before coming to a stop. All 127 occupants were successfully evacuated from the plane, though 7 passengers sustained minor injuries. The aircraft was declared a total loss due to the extent of the structural damage.
Findings
Investigations into the incident highlighted that the crew's decision to disable the cockpit alarm prevented them from addressing the critical landing gear configuration error before touchdown.