Solution : https://service.sap.com/sap/support/notes/311178 (SAP Service marketplace login required)
Key words :
vdatu requested delivery date mbdat material availability date/requirement date edatu schedule line delivery date enhancement j_3aatp, -afs-pp-ppl production planningsecondary components, 5b fixpack #01 including hot packages 19-30 147231 -, original requirements date, related notes 334211 - afs v2, additional key words atp, date fields, atp user-exit 139381 - userexit, -afs-sd sales, atp user exit