Narrative:

A friend in another single engine aircraft had just joined with me flying approximately 1/2 mi apart at the same altitude. We were close to the unopened airport at frisco, tx. My friend alerted me to an xxbb airlines medium large transport that was passing under us. I never did see the medium large transport. I was squawking 1200 and we were under but outside the dfw TCA. The medium large transport was at 3000' MSL, 17 NM from his destination, love field. In the past 5 weeks, I personally have witnessed heavy airliners beneath the TCA passing east to west within 7 NM of addison airport en route to dfw airport at altitudes between 3000 and 5000' MSL. These large turbojets are foregoing the safety of the TCA and flying in a congested area mixing with small slow aircraft. The floor of the TCA is 5000' in this area. Neither safety nor economy would be compromised if the acrs would stay at an altitude that would put them within the TCA.

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Original NASA ASRS Text

Title: SMA OPERATING IN CLOSE PROX DAL ARSA AND DFW TCA OBSERVED AN MLG BELOW ARSA TCA FLOOR AT 3000'. PLT QUESTIONS PRACTICE OF ACFT DESCENDING BELOW ARSA TCA AIRSPACE ON APCH TO DFW OR DAL.

Narrative: A FRIEND IN ANOTHER SINGLE ENG ACFT HAD JUST JOINED WITH ME FLYING APPROX 1/2 MI APART AT THE SAME ALT. WE WERE CLOSE TO THE UNOPENED ARPT AT FRISCO, TX. MY FRIEND ALERTED ME TO AN XXBB AIRLINES MLG THAT WAS PASSING UNDER US. I NEVER DID SEE THE MLG. I WAS SQUAWKING 1200 AND WE WERE UNDER BUT OUTSIDE THE DFW TCA. THE MLG WAS AT 3000' MSL, 17 NM FROM HIS DEST, LOVE FIELD. IN THE PAST 5 WKS, I PERSONALLY HAVE WITNESSED HVY AIRLINERS BENEATH THE TCA PASSING E TO W WITHIN 7 NM OF ADDISON ARPT ENRTE TO DFW ARPT AT ALTS BTWN 3000 AND 5000' MSL. THESE LARGE TURBOJETS ARE FOREGOING THE SAFETY OF THE TCA AND FLYING IN A CONGESTED AREA MIXING WITH SMALL SLOW ACFT. THE FLOOR OF THE TCA IS 5000' IN THIS AREA. NEITHER SAFETY NOR ECONOMY WOULD BE COMPROMISED IF THE ACRS WOULD STAY AT AN ALT THAT WOULD PUT THEM WITHIN THE TCA.

Data retrieved from NASA's ASRS site as of August 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.