FAR 91.103 says, in part: "Each pilot in command shall, before beginning a flight, become familiar with all available information concerning that flight." Several means of achieving this universal enlightenment exist, including AFSS or online briefings, where you spot this NOTAM:
Ailerona IA [IA66]: October NOTAM #9 Communications EN route flight ADVISORY SERVICE 122.0 out of service effective from October 06th, 2013 at 11:00 AM UTC (1310061100) - October 06th, 2013 at 09:30 PM UTC (1310062130)
Once the en route flight advisory service 122.0 returns to service, what radio callsign would you use to call them?
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