WVPF20 NTAA 150227 NTTT SIGMET A8 VALID 150225/150235 NTAA- NTTT TAHITI FIR/UIR TEST VA ADVISORY TEST MSG NOT RECEIVED FM VAAC WASHINGTON VA ERUPTION MT ETNA PSN N3744 E01500 VA CLD FCST WI S1715 W14600 - S1630 W14745 - S1115 W14600 - S1200 W13930 - S1715 W14600 SFC/FL100 WKN FCST AT 0235Z WI S1230 W13645 - S1215 W14200 - S0745 W13915 - S0815 W13330 - S1230 W13645=