A cpr type crew, departing mkc VFR, entered class B airspace on climb out.

Attributes
ACN	534795
Time
Date	200201
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mkc.airport
State Reference	MO
Altitude	msl bound lower : 3500 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 135
Flight Phase	climbout : intermediate altitude
Flight Plan	None
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : multi engine pilot : instrument pilot : commercial
Experience	flight time last 90 days : 41 flight time total : 2400 flight time type : 357
ASRS Report	534795
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	airspace violation : entry non adherence : far non adherence : published procedure
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : insufficient time
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We departed mkc VFR. We stayed at 3000 ft MSL till outside the class D airspace. The bottom of class B airspace at kansas city is 4000 ft. Upon leaving class D airspace, we climbed to 3500 ft. I got the kansas city terminal area chart to see where class B ended. The last ring ended before a medium size lake. I told the PF when we cross 'the lake' we could be able to climb to 5500 ft MSL. I then folded the map and turned around to put it up. When I turned back, we were climbing through 4000 ft. The PF saw a small lake and thought it was the one I stated. I am 99% sure we were outside class B airspace. However, there should have been confirmation on exactly when we would climb. It was poor communication on my part.

Original NASA ASRS Text

Title: A CPR TYPE CREW, DEPARTING MKC VFR, ENTERED CLASS B AIRSPACE ON CLBOUT.

Narrative: WE DEPARTED MKC VFR. WE STAYED AT 3000 FT MSL TILL OUTSIDE THE CLASS D AIRSPACE. THE BOTTOM OF CLASS B AIRSPACE AT KANSAS CITY IS 4000 FT. UPON LEAVING CLASS D AIRSPACE, WE CLBED TO 3500 FT. I GOT THE KANSAS CITY TERMINAL AREA CHART TO SEE WHERE CLASS B ENDED. THE LAST RING ENDED BEFORE A MEDIUM SIZE LAKE. I TOLD THE PF WHEN WE CROSS 'THE LAKE' WE COULD BE ABLE TO CLB TO 5500 FT MSL. I THEN FOLDED THE MAP AND TURNED AROUND TO PUT IT UP. WHEN I TURNED BACK, WE WERE CLBING THROUGH 4000 FT. THE PF SAW A SMALL LAKE AND THOUGHT IT WAS THE ONE I STATED. I AM 99% SURE WE WERE OUTSIDE CLASS B AIRSPACE. HOWEVER, THERE SHOULD HAVE BEEN CONFIRMATION ON EXACTLY WHEN WE WOULD CLB. IT WAS POOR COM ON MY PART.

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.