Corp light transport flight crew crossed active runway on taxi for takeoff.

Attributes
ACN	133131
Time
Date	199001
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mdw
State Reference	IL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	ground other : taxi
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 90 flight time total : 9000 flight time type : 90
ASRS Report	133131
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other controllera
Resolutory Action	other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

At mdw ATIS was broadcasting using both 22L and right, but only 22L was being used for takeoff and landing. We received clearance to taxi to 22L (we thought). Upon arriving 22L and crossing 22R along the way, tower asked us if ground had issued 22L. We acknowledged yes. He challenged us about the runway and advised he thought it was 22R and told us we crossed an active runway west/O clearance. We received our takeoff instructions shortly after and nothing more was said about the crossing. Pilots may be should have paid attention to taxi instructions more closely if indeed we did get 22R and double checked upon crossing 22R with ground control. A simple fact of miscom.

Original NASA ASRS Text

Title: CORP LTT FLT CREW CROSSED ACTIVE RWY ON TAXI FOR TKOF.

Narrative: AT MDW ATIS WAS BROADCASTING USING BOTH 22L AND R, BUT ONLY 22L WAS BEING USED FOR TKOF AND LNDG. WE RECEIVED CLRNC TO TAXI TO 22L (WE THOUGHT). UPON ARRIVING 22L AND XING 22R ALONG THE WAY, TWR ASKED US IF GND HAD ISSUED 22L. WE ACKNOWLEDGED YES. HE CHALLENGED US ABOUT THE RWY AND ADVISED HE THOUGHT IT WAS 22R AND TOLD US WE CROSSED AN ACTIVE RWY W/O CLRNC. WE RECEIVED OUR TKOF INSTRUCTIONS SHORTLY AFTER AND NOTHING MORE WAS SAID ABOUT THE XING. PLTS MAY BE SHOULD HAVE PAID ATTN TO TAXI INSTRUCTIONS MORE CLOSELY IF INDEED WE DID GET 22R AND DOUBLE CHKED UPON XING 22R WITH GND CTL. A SIMPLE FACT OF MISCOM.

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.