Flight crew of crj inadvertently cross hold short line of runway 21L at yum without clearance.

Attributes
ACN	700891
Time
Date	200606
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : azo.tracon
State Reference	MI
Altitude	msl single value : 14000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : azo.tracon
Operator	common carrier : air carrier
Make Model Name	Regional Jet 200 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 200 flight time total : 14500 flight time type : 7500
ASRS Report	700891
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 250 flight time total : 4500 flight time type : 3000
ASRS Report	700890
Events
Anomaly	altitude deviation : overshoot altitude deviation : excursion from assigned altitude conflict : airborne less severe
Independent Detector	aircraft equipment : tcas other controllerb
Resolutory Action	controller : issued advisory none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation

Narrative:

We were cleared to taxi from the ramp to runway 21L. I turned onto taxiway a and as we approached the runway 21R approach area I contacted ground and confirmed that we were cleared across the approach area. I taxied across some hold bars that I thought were for the runway 21R approach area; but realized about 20 ft later that they were for runway 21L. I immediately stopped the aircraft and asked tower for instructions. The tower stated that it was not a problem and cleared us for takeoff. Though I was looking at my commercial airport diagram; the convergence of many txwys and several red and white signs in that area on the taxiway led to my mistaking which hold bars I should have stopped at.

Original NASA ASRS Text

Title: FLT CREW OF CRJ INADVERTENTLY CROSS HOLD SHORT LINE OF RWY 21L AT YUM WITHOUT CLRNC.

Narrative: WE WERE CLRED TO TAXI FROM THE RAMP TO RWY 21L. I TURNED ONTO TXWY A AND AS WE APCHED THE RWY 21R APCH AREA I CONTACTED GND AND CONFIRMED THAT WE WERE CLRED ACROSS THE APCH AREA. I TAXIED ACROSS SOME HOLD BARS THAT I THOUGHT WERE FOR THE RWY 21R APCH AREA; BUT REALIZED ABOUT 20 FT LATER THAT THEY WERE FOR RWY 21L. I IMMEDIATELY STOPPED THE ACFT AND ASKED TWR FOR INSTRUCTIONS. THE TWR STATED THAT IT WAS NOT A PROB AND CLRED US FOR TKOF. THOUGH I WAS LOOKING AT MY COMMERCIAL ARPT DIAGRAM; THE CONVERGENCE OF MANY TXWYS AND SEVERAL RED AND WHITE SIGNS IN THAT AREA ON THE TXWY LED TO MY MISTAKING WHICH HOLD BARS I SHOULD HAVE STOPPED AT.

Data retrieved from NASA's ASRS site as of January 2009 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.