The collapse of a wall display during its execution has significant economic and technical impacts. This paper describes the lesions to the wall before and during the collapse, aiming to identify the causes to prevent future incidents. The methodology involves a chronological analysis of parameters related to the design and execution of the diaphragm wall. The geotechnical study, which was limited and optimistic, provided key parameters. The engineer must analyze and weigh these parameters in future designs. The geotechnical study reflects average values, so the engineer should consider characteristic values or apply adjustments. The design of the structure, including the thickness and number of anchorages, is crucial for increasing safety and reducing the probability of collapse. The results show that using characteristic geotechnical parameters instead of average values and applying sufficient safety factors could have prevented the collapse. The technical solution to such incidents is complex and costly, involving structural modifications and altering original design characteristics. **Keywords:** Pathology; Wall screen; Intervention plans; Structural evaluation.The collapse of a wall display during its execution has significant economic and technical impacts. This paper describes the lesions to the wall before and during the collapse, aiming to identify the causes to prevent future incidents. The methodology involves a chronological analysis of parameters related to the design and execution of the diaphragm wall. The geotechnical study, which was limited and optimistic, provided key parameters. The engineer must analyze and weigh these parameters in future designs. The geotechnical study reflects average values, so the engineer should consider characteristic values or apply adjustments. The design of the structure, including the thickness and number of anchorages, is crucial for increasing safety and reducing the probability of collapse. The results show that using characteristic geotechnical parameters instead of average values and applying sufficient safety factors could have prevented the collapse. The technical solution to such incidents is complex and costly, involving structural modifications and altering original design characteristics. **Keywords:** Pathology; Wall screen; Intervention plans; Structural evaluation.