Narrative:

We were operating a flight from mdw southbound. Our clearance was the midway seven departure procedure to dennt with an initial altitude of 3;000 ft. The departure procedure has a speed restriction note that says; 'all turbojet departures routed over... Dennt... Maintain 250 KTS until advised by ATC.' the overlying shelf of O'hare's class B airspace has a floor of 3;600 ft. So; my question was: if we had to level at 3;000 ft enroute to dennt; which rule would apply: 1) do not exceed 200 KTS below the floor of class B airspace -or- 2) maintain 250 KTS if routed over dennt? Prior to pushback; I asked ground. Ground said to do 250 KTS. I asked if the controller had a waiver for the 200 KT speed limit when operating below the floor of O'hare's class B. Ground said the speed limit was 250 KTS. I asked for a phone number. Then; I called the tower supervisor and asked him my question. He said the TRACON expected me to do 250 KTS. I asked if he had a waiver for the 200 KT speed limit below O'hare's class B. He gave me a different phone number. That number went to the TRACON. I asked the TRACON controller my question. He said I was expected to do 250 KTS. When I asked if he had a waiver for the 200 KT speed limit below the floor of O'hare's class B; he said that if I needed to do 200 KTS then I should notify the departure controller. In the end it was determined that no waiver exists. If we were to level below the class B; the 200 KT speed limit would apply despite the speed restriction note on the midway seven departure procedure. After takeoff; we did have to level at 3;000 ft and we kept the speed back at 200 KTS. Depict the overlying class B airspace and its associated altitudes on the midway seven departure procedure chart. Arrange a waiver to void the 200 KT speed limit below the class B enroute to the affected fixes. Change the initial altitude to 4;000 ft instead of 3;000 ft.

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Original NASA ASRS Text

Title: CRJ50 Captain questions the 250 KT speed restriction on the MDWAY7 departure southbound and whether the 200 KT speed restriction still applies. The TRACON replies that 250 KTS is expected but a waiver to the 200 KT rule does not exist.

Narrative: We were operating a flight from MDW southbound. Our clearance was the MIDWAY SEVEN Departure Procedure to DENNT with an initial altitude of 3;000 FT. The Departure Procedure has a speed restriction note that says; 'All turbojet departures routed over... DENNT... maintain 250 KTS until advised by ATC.' The overlying shelf of O'Hare's Class B airspace has a floor of 3;600 FT. So; my question was: If we had to level at 3;000 FT enroute to DENNT; which rule would apply: 1) Do not exceed 200 KTS below the floor of Class B airspace -or- 2) Maintain 250 KTS if routed over DENNT? Prior to pushback; I asked Ground. Ground said to do 250 KTS. I asked if the Controller had a waiver for the 200 KT speed limit when operating below the floor of O'Hare's Class B. Ground said the speed limit was 250 KTS. I asked for a phone number. Then; I called the Tower Supervisor and asked him my question. He said the TRACON expected me to do 250 KTS. I asked if he had a waiver for the 200 KT speed limit below O'Hare's Class B. He gave me a different phone number. That number went to the TRACON. I asked the TRACON Controller my question. He said I was expected to do 250 KTS. When I asked if he had a waiver for the 200 KT speed limit below the floor of O'Hare's Class B; he said that if I needed to do 200 KTS then I should notify the Departure Controller. In the end it was determined that no waiver exists. If we were to level below the Class B; the 200 KT speed limit would apply despite the speed restriction note on the MIDWAY SEVEN Departure Procedure. After takeoff; we did have to level at 3;000 FT and we kept the speed back at 200 KTS. Depict the overlying Class B airspace and its associated altitudes on the MIDWAY SEVEN Departure Procedure chart. Arrange a waiver to void the 200 KT speed limit below the Class B enroute to the affected fixes. Change the initial altitude to 4;000 FT instead of 3;000 FT.

Data retrieved from NASA's ASRS site as of April 2012 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.