LETTER TO AIRMEN FROM JFK TRACON (N90) CONFLICTS WITH ADVISORY IN ARPT FACILITY DIRECTORY.

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THE LONG ISLAND ARSA DEPICTED ON THE NY SECTIONAL STATES 'SEE NOTAMS/DIRECTORY FOR ARSA EFFECTIVE HRS.' THE ARPT/FACILITY DIRECTORY NE DOES NOT SPECIFY ANY EFFECTIVE HRS FOR THE ARSA INDICATING A FULL TIME ARSA. NY TRACON HAS STATED PER TELECON AND IN A LETTER TO AIRMEN THAT ARSA SVC IS NOT PROVIDED WHEN THE TWR IS CLOSED. (LONG ISLAND TWR OPERATES 0600-2300). THIS CONFLICTING INFO SHOULD BE CORRECTED BY CHANGING THE ARPT FACILITY DIRECTORY TO REFLECT THE ARSA EFFECTIVE HRS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED HE WAS A GA PLT WITH 450 TOTAL FLYING TIME. HE SAID THAT AN FAA EXAMINER HAD ASKED HIM A QUESTION PERTAINING TO THE OPERATING HRS OF THE ARSA AT ISP. AFTER CHKING WITH NY TRACON (N90); HE LEARNED THAT IT WAS NOT A FULL TIME ARSA. HE MENTIONED THAT THE TRACON WAS AWARE OF THE NOTATION ON THE TCA SECTIONAL CHART REFERRING TO ARSA EFFECTIVE HRS; AND PLANNED TO HAVE THE HRS PUBLISHED IN THE ARPT FACILITY DIRECTORY; BUT SO FAR; HE HAS NOT SEEN IT. HE WAS NOT SURE IF THE TRACON CTLED THE ENTIRE ARSA; OR IF THE TWR WAS RESPONSIBLE FOR THE INNER CORE. THEY NORMALLY WILL HAND OFF AN ACFT TO THE TWR AT LEAST 5 MI FROM THE ARPT.