FVXX20 KNES 211711 VA ADVISORY DTG: 20100421/1711Z VAAC: WASHINGTON VOLCANO: SANGAY 1502-09 PSN: S0202 W07820 AREA: ECUADOR SUMMIT ELEV: 17159 FT (5230 M) ADVISORY NR: 2010/016 INFO SOURCE: PILOT REPORT. ERUPTION DETAILS: ACFT REPORT 21/1634 TO FL220 RMK: WE HAVE RECEIVED INFORMATION SUGGESTING A POSSIBLE VA EMISSION. WE WILL GATHER FURTHER INFORMATION AND ISSUE A FULL ADVISORY AS SOON AS POSSIBLE. NXT ADVISORY: AS SOON AS POSSIBLE NNNN