Emb taxiing for departure at yum crossed hold line for departure runway without clearance.

Attributes
ACN	582455
Time
Date	200305
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : yum.airport
State Reference	AZ
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Brasilia EMB-120 All Series
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 6000 flight time type : 4000
ASRS Report	582455
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	incursion : runway non adherence : far non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were cleared to taxi to runway 21L in yuma, due to several runway closures we had to use runway 21L which we were somewhat unfamiliar. While taxiing we thought we were crossing the approach end of runway 21R (which has a displaced threshold), but we actually crossed the stopway for runway 21L. We were in contact with ground control the entire time and we did see the landing traffic on a 5 mi final.

Original NASA ASRS Text

Title: EMB TAXIING FOR DEP AT YUM CROSSED HOLD LINE FOR DEP RWY WITHOUT CLRNC.

Narrative: WE WERE CLRED TO TAXI TO RWY 21L IN YUMA, DUE TO SEVERAL RWY CLOSURES WE HAD TO USE RWY 21L WHICH WE WERE SOMEWHAT UNFAMILIAR. WHILE TAXIING WE THOUGHT WE WERE XING THE APCH END OF RWY 21R (WHICH HAS A DISPLACED THRESHOLD), BUT WE ACTUALLY CROSSED THE STOPWAY FOR RWY 21L. WE WERE IN CONTACT WITH GND CTL THE ENTIRE TIME AND WE DID SEE THE LNDG TFC ON A 5 MI FINAL.

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.