Narrative:

Cleared via mdw 3 departure from runway 31L to climb to 3000', flight planned route (sbn first fix). #2 for takeoff we began verbal review of SID. Tower cleared aircraft ahead for takeoff, then cleared us into position and hold. Completed checklist and was cleared immediate takeoff as soon as aircraft ahead was in turn (we had not crossed the hold short). NAVAID #2 on local DME, #1 was on sbn (first fix). Passing 1300' MSL (approximately 1 1/2 mi DME began turn to assigned 090 degree heading) was below maneuvering speed so turning at 15 degree angle of bank. DME approaching 3 and accelerating. Captain called 1000' to go. Began reducing power and slowing climb so as not to overshoot 3000'. Between 3 and 4 DME was at clean maneuvering speed (approximately 205-210 KTS) went to 30 degree angle of bank to reach 090 degree heading. Leveling at 3000' (approximately 2800-3000' indicated on copilot's side began accelerating up to 250 KTS still in turn). Departure control gave us 120 degree heading. We acknowledged. Departure asked our airspeed and we replied 250 KTS. Then departure said something like, 'did you know you are not to exceed 200 KTS at the floor of the TCA to keep your turn out of some buildings?' we replied, 'no, we didn't know that.' we were on 120 degree heading by now. We were given turn back to 090 degree heading and a climb to 4000' and a frequency change. Departure was 118.4. A cannot remember the new frequency. I did not know our DME as we passed the 090 degree heading first assigned. I do know the turn could not be tighter initially due to clean maneuvering speed and the 1300' SID restriction for starting turn.

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Original NASA ASRS Text

Title: ACR MAY HAVE EXCEEDED FEDERAL AVIATION REG 91.70 SPEED LIMIT BELOW TCA.

Narrative: CLRED VIA MDW 3 DEP FROM RWY 31L TO CLB TO 3000', FLT PLANNED ROUTE (SBN FIRST FIX). #2 FOR TKOF WE BEGAN VERBAL REVIEW OF SID. TWR CLRED ACFT AHEAD FOR TKOF, THEN CLRED US INTO POS AND HOLD. COMPLETED CHKLIST AND WAS CLRED IMMEDIATE TKOF AS SOON AS ACFT AHEAD WAS IN TURN (WE HAD NOT CROSSED THE HOLD SHORT). NAVAID #2 ON LCL DME, #1 WAS ON SBN (FIRST FIX). PASSING 1300' MSL (APPROX 1 1/2 MI DME BEGAN TURN TO ASSIGNED 090 DEG HDG) WAS BELOW MANEUVERING SPD SO TURNING AT 15 DEG ANGLE OF BANK. DME APCHING 3 AND ACCELERATING. CAPT CALLED 1000' TO GO. BEGAN REDUCING PWR AND SLOWING CLB SO AS NOT TO OVERSHOOT 3000'. BTWN 3 AND 4 DME WAS AT CLEAN MANEUVERING SPD (APPROX 205-210 KTS) WENT TO 30 DEG ANGLE OF BANK TO REACH 090 DEG HDG. LEVELING AT 3000' (APPROX 2800-3000' INDICATED ON COPLT'S SIDE BEGAN ACCELERATING UP TO 250 KTS STILL IN TURN). DEP CTL GAVE US 120 DEG HDG. WE ACKNOWLEDGED. DEP ASKED OUR AIRSPD AND WE REPLIED 250 KTS. THEN DEP SAID SOMETHING LIKE, 'DID YOU KNOW YOU ARE NOT TO EXCEED 200 KTS AT THE FLOOR OF THE TCA TO KEEP YOUR TURN OUT OF SOME BUILDINGS?' WE REPLIED, 'NO, WE DIDN'T KNOW THAT.' WE WERE ON 120 DEG HDG BY NOW. WE WERE GIVEN TURN BACK TO 090 DEG HDG AND A CLB TO 4000' AND A FREQ CHANGE. DEP WAS 118.4. A CANNOT REMEMBER THE NEW FREQ. I DID NOT KNOW OUR DME AS WE PASSED THE 090 DEG HDG FIRST ASSIGNED. I DO KNOW THE TURN COULD NOT BE TIGHTER INITIALLY DUE TO CLEAN MANEUVERING SPD AND THE 1300' SID RESTRICTION FOR STARTING TURN.

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.