Narrative:

We blocked out of the FBO at XA00 at this time opa locka's tower was closed, so we transmitted on the CTAF frequency 120.7 that we were taxiing from FBO for departure on runway 12. We heard no reply. We began our taxi and saw our company aircraft take off on runway 9L, so we decided to taxi to runway 9L instead. We heard our company's radio calls as they left the airport. We did our performance checks holding short at the end of runway 9L. We then called out that we were taking off runway 9L any traffic. Please advise. There was no reply. We took position on the runway and finished our takeoff check. As we took position we cleared final and departure ends, both seemed clear. We finished our takeoff check and prepared to depart, when the pilot flying saw the anti collision lights of an aircraft approaching us from the opposite end. We then turned to get off the runway as we saw what looked like a challenger jet take off runway 27R over us. We cleared the runway, turned back and I radioed once more that we were taking off runway 9L any traffic please advise. No reply. We then took the runway and departure to the east. Another of our company aircraft taxied out behind us and we heard all of their radio calls clearly. We never heard a single radio call from the jet that departure runway 27R. Our company behind us, never heard them call, but they heard all our calls clearly. I can only guess as to why the jet traffic made no call outs on the CTAF frequency. This situation could have been averted if the jet had been on the proper frequency or if the tower was open 24 hours a day. Unfortunately this all happened less than fifteen minutes before tower opened. Callback conversation with reporter revealed the following information: reporter stated that before taking the runway, they cleared both ends. Lights were seen on the opposite end, but the crew believed they were street light signals. When the other aircraft turned on his light for takeoff, they immediately cleared the runway.

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Original NASA ASRS Text

Title: CARGO FLT AT OPF USING CTAF PROCS STARTS TO TAKE OFF ON RWY 09L, BUT CLEARS IMMEDIATELY WHEN TFC IS OBSERVED DEPARTING ON THE OPPOSITE END.

Narrative: WE BLOCKED OUT OF THE FBO AT XA00 AT THIS TIME OPA LOCKA'S TOWER WAS CLOSED, SO WE XMITTED ON THE CTAF FREQ 120.7 THAT WE WERE TAXIING FROM FBO FOR DEP ON RWY 12. WE HEARD NO REPLY. WE BEGAN OUR TAXI AND SAW OUR COMPANY ACFT TAKE OFF ON RWY 9L, SO WE DECIDED TO TAXI TO RWY 9L INSTEAD. WE HEARD OUR COMPANY'S RADIO CALLS AS THEY LEFT THE ARPT. WE DID OUR PERFORMANCE CHECKS HOLDING SHORT AT THE END OF RWY 9L. WE THEN CALLED OUT THAT WE WERE TAKING OFF RWY 9L ANY TFC. PLEASE ADVISE. THERE WAS NO REPLY. WE TOOK POS ON THE RWY AND FINISHED OUR TKOF CHECK. AS WE TOOK POS WE CLEARED FINAL AND DEP ENDS, BOTH SEEMED CLEAR. WE FINISHED OUR TKOF CHECK AND PREPARED TO DEPART, WHEN THE PLT FLYING SAW THE ANTI COLLISION LIGHTS OF AN ACFT APCHING US FROM THE OPPOSITE END. WE THEN TURNED TO GET OFF THE RWY AS WE SAW WHAT LOOKED LIKE A CHALLENGER JET TAKE OFF RWY 27R OVER US. WE CLEARED THE RWY, TURNED BACK AND I RADIOED ONCE MORE THAT WE WERE TAKING OFF RWY 9L ANY TFC PLEASE ADVISE. NO REPLY. WE THEN TOOK THE RWY AND DEP TO THE E. ANOTHER OF OUR COMPANY ACFT TAXIED OUT BEHIND US AND WE HEARD ALL OF THEIR RADIO CALLS CLEARLY. WE NEVER HEARD A SINGLE RADIO CALL FROM THE JET THAT DEP RWY 27R. OUR COMPANY BEHIND US, NEVER HEARD THEM CALL, BUT THEY HEARD ALL OUR CALLS CLEARLY. I CAN ONLY GUESS AS TO WHY THE JET TFC MADE NO CALL OUTS ON THE CTAF FREQ. THIS SIT COULD HAVE BEEN AVERTED IF THE JET HAD BEEN ON THE PROPER FREQ OR IF THE TOWER WAS OPEN 24 HOURS A DAY. UNFORTUNATELY THIS ALL HAPPENED LESS THAN FIFTEEN MINUTES BEFORE TOWER OPENED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT BEFORE TAKING THE RWY, THEY CLEARED BOTH ENDS. LIGHTS WERE SEEN ON THE OPPOSITE END, BUT THE CREW BELIEVED THEY WERE STREET LIGHT SIGNALS. WHEN THE OTHER ACFT TURNED ON HIS LIGHT FOR TKOF, THEY IMMEDIATELY CLEARED THE RWY.

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.