For now I'm convinced in the next statements:
- I can fly any NPA in LNAV mode if procedure has generated by FMS from database;
- It's strongly recomended to monitor the raw data from relevant beacon for cross-check, because of probable mistakes in the database, FMS faults or manual entries;
- It's restricted to use FMS in non-GPS (DME/DME etc. ) updating mode if NPA requires GPS (DME/DME etc)