Air carrier taxi clearance amended. Flight crew thought cleared to cross runway. Tower says not clea...

Attributes
ACN	145286
Time
Date	199005
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : stl
State Reference	MO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 2700
ASRS Report	145286
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 195 flight time total : 18500 flight time type : 195
ASRS Report	145633
Events
Anomaly	incursion : runway other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

Flight was cleared to taxi from the gate to runway 30R to hold short of runway 30L. The ground controller was busy and talking very fast. We taxied to hold short of runway 30L and were blocked by another aircraft, at that time the controller said we had missed our taxiway and could we make a 180 degree turn, which we did. He then indicated that he could get us out soon from the intersection of taxiway right. His next instructions were to turn right on right cross runway 30L and to contact the tower for departure from runway 30R. After crossing the tower told us we were not cleared across runway 30L. At no time during taxi was our departure runway changed nor did we readback a runway change. Additionally at no time was there a conflict with other aircraft as we were crossing runway 30L.

Original NASA ASRS Text

Title: ACR TAXI CLRNC AMENDED. FLT CREW THOUGHT CLEARED TO CROSS RWY. TWR SAYS NOT CLEARED.

Narrative: FLT WAS CLRED TO TAXI FROM THE GATE TO RWY 30R TO HOLD SHORT OF RWY 30L. THE GND CTLR WAS BUSY AND TALKING VERY FAST. WE TAXIED TO HOLD SHORT OF RWY 30L AND WERE BLOCKED BY ANOTHER ACFT, AT THAT TIME THE CTLR SAID WE HAD MISSED OUR TXWY AND COULD WE MAKE A 180 DEG TURN, WHICH WE DID. HE THEN INDICATED THAT HE COULD GET US OUT SOON FROM THE INTXN OF TXWY R. HIS NEXT INSTRUCTIONS WERE TO TURN RIGHT ON R CROSS RWY 30L AND TO CONTACT THE TWR FOR DEP FROM RWY 30R. AFTER XING THE TWR TOLD US WE WERE NOT CLRED ACROSS RWY 30L. AT NO TIME DURING TAXI WAS OUR DEP RWY CHANGED NOR DID WE READBACK A RWY CHANGE. ADDITIONALLY AT NO TIME WAS THERE A CONFLICT WITH OTHER ACFT AS WE WERE XING RWY 30L.

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.

Air carrier taxi clearance amended. Flight crew thought cleared to cross runway. Tower says not cleared.