Narrative:

Took off at XA15 from grand strand airport to myrtle beach jet port. Tower controller listed hours at myrtle beach jet port from XA00 am to XB00 am. Aircraft landed on active runway 17 by AWOS. Announced base and final over tower frequency with no responses. After landing and picking up passenger airport security asked us to call the tower. The captain was talking with ground control and asked what time tower opened? The reply was xcam. When I returned to my flight position I saw that I had been talking on 126.50 frequency when the tower frequency was 126.05. I take the responsibility for the error. There was no conflict of any kind. It is a very short flight between the 2 airports and workload is high. It is not a very good reason for the error I know, but I don't know what else to report. Callback conversation with reporter revealed the following information: the captain said that the crew was flying a west wind 1124 on a positioning flight to myr. This is a very short flight and it has a high workload of checklists and reports and, in this case, attempts at TA's. The crew did not know about their error until a short time after arrival when airport security requested a call to the tower. The ATCT local controller was pleasant and informative. The captain had already discovered the incorrect frequency when he checked it after talking to security. No contact other than the tower with the FAA to this date.

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Original NASA ASRS Text

Title: UNAUTH LNDG -- CPR FLC LANDS WITHOUT A CLRNC. THEY THOUGHT THAT THE TWR WAS NOT OPERATIONAL AT THIS TIME OF THE MORNING.

Narrative: TOOK OFF AT XA15 FROM GRAND STRAND ARPT TO MYRTLE BEACH JET PORT. TWR CTLR LISTED HRS AT MYRTLE BEACH JET PORT FROM XA00 AM TO XB00 AM. ACFT LANDED ON ACTIVE RWY 17 BY AWOS. ANNOUNCED BASE AND FINAL OVER TWR FREQ WITH NO RESPONSES. AFTER LNDG AND PICKING UP PAX ARPT SECURITY ASKED US TO CALL THE TWR. THE CAPT WAS TALKING WITH GND CTL AND ASKED WHAT TIME TWR OPENED? THE REPLY WAS XCAM. WHEN I RETURNED TO MY FLT POS I SAW THAT I HAD BEEN TALKING ON 126.50 FREQ WHEN THE TWR FREQ WAS 126.05. I TAKE THE RESPONSIBILITY FOR THE ERROR. THERE WAS NO CONFLICT OF ANY KIND. IT IS A VERY SHORT FLT BTWN THE 2 ARPTS AND WORKLOAD IS HIGH. IT IS NOT A VERY GOOD REASON FOR THE ERROR I KNOW, BUT I DON'T KNOW WHAT ELSE TO RPT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE CAPT SAID THAT THE CREW WAS FLYING A W WIND 1124 ON A POSITIONING FLT TO MYR. THIS IS A VERY SHORT FLT AND IT HAS A HIGH WORKLOAD OF CHKLISTS AND RPTS AND, IN THIS CASE, ATTEMPTS AT TA'S. THE CREW DID NOT KNOW ABOUT THEIR ERROR UNTIL A SHORT TIME AFTER ARR WHEN ARPT SECURITY REQUESTED A CALL TO THE TWR. THE ATCT LCL CTLR WAS PLEASANT AND INFORMATIVE. THE CAPT HAD ALREADY DISCOVERED THE INCORRECT FREQ WHEN HE CHKED IT AFTER TALKING TO SECURITY. NO CONTACT OTHER THAN THE TWR WITH THE FAA TO THIS DATE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.