Solution : https://service.sap.com/sap/support/notes/1162641 (SAP Service marketplace login required)
Key words : 
0 bi            import support package 18, sap netweaver bi accelerator, delete request reason, bi accelerator, sap netweaver 7, bi patch 18, sapbinews bi 7, support package, 0 support package 18, package dimension
Related Notes : 
       
| 1564210 | Collective Note: BW Accelerator "Inactive" Index Status | 
| 1298405 | BIA - Request deleted from BIA only | 
| 1162365 | Collective note: BIA and incorrect data | 
| 1136882 | SAPBINews NW7.0 BI Support Package 18 | 
| 1125042 | BIA remains inactive after a request is deleted |