Taxied across active runway without clearance.

Attributes
ACN	99511
Time
Date	198812
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : tus
State Reference	AZ
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
Navigation In Use	Other
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 5000 flight time type : 800
ASRS Report	99511
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 20000 flight time type : 1200
ASRS Report	99523
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
Airport	procedure or policy : unspecified

Narrative:

We had been cleared to taxi to runway 11L for takeoff from tus. As we approached runway 21 the captain and I checked for traffic and taxied across runway 21, as I thought we had been cleared. 2 aircraft were on final for runway 11L and there was no traffic for runway 21. Ground control advised us our crossing and active runway after we were clear of runway 21. Closer inspection of the communication page of tus showed a note concerning where runway 11L begins (at the intersection of taxiway 4, prior to runway 21). We contacted the tower and were cleared for a normal takeoff. Concerning to note on the beginning of runway 11L. This note should be surrounded by a black border with a bold type caution advisory. Also permanent signs or markings should be erected on taxiway a at tus to serve as a better warning of an active runway. Supplemental information from acn 99523: I did not see any sign indicating we should enter at T4. We may have missed it while doing the checklist.

Original NASA ASRS Text

Title: TAXIED ACROSS ACTIVE RWY WITHOUT CLRNC.

Narrative: WE HAD BEEN CLRED TO TAXI TO RWY 11L FOR TKOF FROM TUS. AS WE APCHED RWY 21 THE CAPT AND I CHKED FOR TFC AND TAXIED ACROSS RWY 21, AS I THOUGHT WE HAD BEEN CLRED. 2 ACFT WERE ON FINAL FOR RWY 11L AND THERE WAS NO TFC FOR RWY 21. GND CTL ADVISED US OUR XING AND ACTIVE RWY AFTER WE WERE CLR OF RWY 21. CLOSER INSPECTION OF THE COM PAGE OF TUS SHOWED A NOTE CONCERNING WHERE RWY 11L BEGINS (AT THE INTXN OF TXWY 4, PRIOR TO RWY 21). WE CONTACTED THE TWR AND WERE CLRED FOR A NORMAL TKOF. CONCERNING TO NOTE ON THE BEGINNING OF RWY 11L. THIS NOTE SHOULD BE SURROUNDED BY A BLACK BORDER WITH A BOLD TYPE CAUTION ADVISORY. ALSO PERMANENT SIGNS OR MARKINGS SHOULD BE ERECTED ON TXWY A AT TUS TO SERVE AS A BETTER WARNING OF AN ACTIVE RWY. SUPPLEMENTAL INFO FROM ACN 99523: I DID NOT SEE ANY SIGN INDICATING WE SHOULD ENTER AT T4. WE MAY HAVE MISSED IT WHILE DOING THE CHKLIST.

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.