Narrative:

I received a takeoff clearance to depart runway 25 at orl. The tower told us to make a right downwind departure, with no mention of an altitude restr. I departed without incident. On mid field downwind, tower told us to turn to heading 180 degrees to overfly the field. Tower then said, immediately following, to fly heading 090 degrees. About 2 mins later, I noticed my student had climbed to 1800 ft MSL which put us in mco class B airspace without clearance. I told the student to descend immediately. Almost as soon as we started descending, executive tower asked us to descend to 1500 ft. Approximately 3 mins later, an air carrier B737 passed within 1/4 mi horizontally and 500 ft vertically. Executive tower gave us no tfa's nor were we ever told to change assigned heading of 090 degrees and assigned altitude of 1500 ft MSL. Upon landing at mlb, local control told me I needed to contact mco approach. I placed the phone call, and was advised that I had caused a TCASII RA to sound in a B737 and a preliminary deviation would be filed. Although I was on heading and altitude, I feel the jet may have been too low. Additionally, executive control tower may have had us on a vector too far south. To prevent recurrence, executive tower should advise pilots of altitude limits in such complex airspace. Additionally, they should advise pilots to change frequencys when approaching the limits of orl's class D airspace.

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Original NASA ASRS Text

Title: POTENTIAL CONFLICT OCCURS WHEN THE PLTS OF A PA28 TRAINING FLT EXPERIENCE AN ALT EXCURSION THAT SETS OFF A TCASII TA RA ON A B737 WHEN 4 NM E OF ORL, FL.

Narrative: I RECEIVED A TKOF CLRNC TO DEPART RWY 25 AT ORL. THE TWR TOLD US TO MAKE A R DOWNWIND DEP, WITH NO MENTION OF AN ALT RESTR. I DEPARTED WITHOUT INCIDENT. ON MID FIELD DOWNWIND, TWR TOLD US TO TURN TO HDG 180 DEGS TO OVERFLY THE FIELD. TWR THEN SAID, IMMEDIATELY FOLLOWING, TO FLY HDG 090 DEGS. ABOUT 2 MINS LATER, I NOTICED MY STUDENT HAD CLBED TO 1800 FT MSL WHICH PUT US IN MCO CLASS B AIRSPACE WITHOUT CLRNC. I TOLD THE STUDENT TO DSND IMMEDIATELY. ALMOST AS SOON AS WE STARTED DSNDING, EXECUTIVE TWR ASKED US TO DSND TO 1500 FT. APPROX 3 MINS LATER, AN ACR B737 PASSED WITHIN 1/4 MI HORIZLY AND 500 FT VERTLY. EXECUTIVE TWR GAVE US NO TFA'S NOR WERE WE EVER TOLD TO CHANGE ASSIGNED HDG OF 090 DEGS AND ASSIGNED ALT OF 1500 FT MSL. UPON LNDG AT MLB, LCL CTL TOLD ME I NEEDED TO CONTACT MCO APCH. I PLACED THE PHONE CALL, AND WAS ADVISED THAT I HAD CAUSED A TCASII RA TO SOUND IN A B737 AND A PRELIMINARY DEV WOULD BE FILED. ALTHOUGH I WAS ON HDG AND ALT, I FEEL THE JET MAY HAVE BEEN TOO LOW. ADDITIONALLY, EXECUTIVE CTL TWR MAY HAVE HAD US ON A VECTOR TOO FAR S. TO PREVENT RECURRENCE, EXECUTIVE TWR SHOULD ADVISE PLTS OF ALT LIMITS IN SUCH COMPLEX AIRSPACE. ADDITIONALLY, THEY SHOULD ADVISE PLTS TO CHANGE FREQS WHEN APCHING THE LIMITS OF ORL'S CLASS D AIRSPACE.

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.