Solution : https://service.sap.com/sap/support/notes/744759 (SAP Service marketplace login required)
Key words : 
display -> pp -> pp-pi -> pp-pi-pmaor, symptom missing pp-pi menu paths, software architecture/maintenance tracks, pp-pi transactions, pp production planning, sap system architecture, ea-appl -  sap, application components -> sap, extension set reason, extension set solution
Related Notes : 
       
| 823533 | FB2E: Missing menu paths for Intercompany reconciliation | 
| 588364 | Prerequisites for activating extensions | 
| 538887 | SAP R/3 Enterprise 47x110: Software architecture/maintenance | 
| 535003 | SAP R/3 Enterprise Extension Set 1.10: Activation switch |