Solution : https://service.sap.com/sap/support/notes/166212 (SAP Service marketplace login required)
Key words : 
data element        fipos          fipos        fistl          fistl        geber          bp_geber  check, se11   select field 'structure'  enter, basic sales document, additional key words, customer line item, fm account assignments, account assignments, noted item, commitment item, account assignment
Related Notes : 
       
| 165856 | Down payment clearing not posted to FI | 
| 113347 | Down payment process. as of Release 4.0x (standard) |