Samajwadi Party chief Akhilesh Yadav is unlikely to appear before the CBI on Thursday for questioning in an illegal mining case registered five years ago in which he is a witness, party sources said. The former Uttar Pradesh chief minister is scheduled to attend a meeting of PDA "Picchda (backward classes), Dalit and Alpsankhyak (minorities)" at the party office here and has no plans to go anywhere till now, they said.