Narrative:

I called for and received a clearance void time for takeoff from spa. The clearance read a void time of XA16. We were airborne via a time hack from our GPS/FMS of XA13. The time 'now' in the clearance was 2 mins different than our FMS's. So if we add +2 mins to the XA13 we were airborne at XA15. We did not make contact with greer approach until approximately XA18 climbing through 2500 ft, at which time greer approach said we 'missed our clearance void time.' (not sure what the confusion was at that point.) when greer handed us off he asked again if we heard him say we had missed our 'void' time. At that point no discussion on the radio would be relevant. We were VMC/until level at 3000 ft MSL, we had TCASII targets above us, but no TA's or RA. We were airborne before the void time!

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Original NASA ASRS Text

Title: F900 CREW DEPARTED SPA AFTER IFR CLRNC VOID IF NOT OFF BY RELEASE TIME.

Narrative: I CALLED FOR AND RECEIVED A CLRNC VOID TIME FOR TKOF FROM SPA. THE CLRNC READ A VOID TIME OF XA16. WE WERE AIRBORNE VIA A TIME HACK FROM OUR GPS/FMS OF XA13. THE TIME 'NOW' IN THE CLRNC WAS 2 MINS DIFFERENT THAN OUR FMS'S. SO IF WE ADD +2 MINS TO THE XA13 WE WERE AIRBORNE AT XA15. WE DID NOT MAKE CONTACT WITH GREER APCH UNTIL APPROX XA18 CLBING THROUGH 2500 FT, AT WHICH TIME GREER APCH SAID WE 'MISSED OUR CLRNC VOID TIME.' (NOT SURE WHAT THE CONFUSION WAS AT THAT POINT.) WHEN GREER HANDED US OFF HE ASKED AGAIN IF WE HEARD HIM SAY WE HAD MISSED OUR 'VOID' TIME. AT THAT POINT NO DISCUSSION ON THE RADIO WOULD BE RELEVANT. WE WERE VMC/UNTIL LEVEL AT 3000 FT MSL, WE HAD TCASII TARGETS ABOVE US, BUT NO TA'S OR RA. WE WERE AIRBORNE BEFORE THE VOID TIME!

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.