After a suitable introduction at the Thebes Hotel, he proceeded to recap what we have already learnt in previous talks, about the 30-pillared hall in this tomb having representations of Amenhotep III on one side of the central axis and Amenhotep IV on the other side. The tomb was not completed but abandoned in about year 35 of Amenhotep III when Akhenaten moved to Amarna. Only 2 of the pillars remained in position but others have been rebuilt over the last 5 years, using modern methods that can accommodate any new fragments of decoration that are recovered.
He then went on to discuss the geology of the site: AT-28 lies in the Tarawan Chalk whereas TT366, the Tomb of Djar whose courtyard is above AT-28 is in the Esna Shale. There is a solid roof of about 2 metres separating the 2. In other tombs in the Tarawan chalk (such as that of Kheruef that has similar proportions to that of AT-28) the roof has broken in. Francisco is trying to protect the integrity of his own roof, to avoid damage or accident.
But in April 2018 a team led by Antonio Morales spent 8 days working in the courtyard above. They reduced the thickness of the intervening layer of rock by about half a metre, threatening the integrity of both structures. Francisco expresses his concerns very clearly in the final few slides.