Crj-100 flight crew has a runway incursion at dtw.

Attributes
ACN	698900
Time
Date	200606
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dtw.airport
State Reference	MI
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : dtw.tower
Operator	common carrier : air carrier
Make Model Name	Regional Jet 200 ER&LR
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
Experience	flight time last 90 days : 90 flight time total : 12000 flight time type : 7000
ASRS Report	698900
Person 2
Affiliation	company : air carrier
Function	oversight : flight attendant in charge
Experience	flight time last 90 days : 220 flight time total : 4700 flight time type : 2400
ASRS Report	698901
Events
Anomaly	conflict : ground less severe incursion : runway non adherence : clearance
Independent Detector	other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued advisory
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance Airport
Primary Problem	Flight Crew Human Performance

Narrative:

We landed on runway 4L in dtw. ATC taxi instructions after landing were; 'A7; south on taxiway a; hold short runway 4R on A5.' taxi instructions were understood and complied with. We were holding short of runway 4R at A5 for several mins. Ground control frequency was in control of the flight. The ground frequency was very congested. After several mins of holding short or runway 4R; I heard; 'air carrier X taxi south on taxiway Y.' the first officer heard the clearance also and replied to ATC; 'air carrier X taxi south on taxiway Y.' I looked to the approach end of runway 4R and saw an rj that looked to be holding in position on runway 4. I applied thrust to get the aircraft moving forward. At the same time; I asked my first officer to clarify with ATC to taxi south of taxiway Y as this direction was away from our intended gate. Simultaneously; I saw the rj at the approach end of runway 4R moving down the runway and I heard the ground controller telling us to stop. The aircraft did penetrate the hold short line. It did not penetrate the runway edge. Apparently there was another XXX (same call sign number) on the same frequency. I did not hear a specific call sign used and I assumed the 'XXX taxi south on taxiway Y' was for our flight. I should have immediately clarified with ATC that it was 'XXX' that was cleared to cross runway 4R and taxi south on taxiway Y. The radio congestion on the frequency was such that abbreviated xmissions were being used. Unfortunately; this added to the incident. Supplemental information from acn 698901: I called ground and asked what direction he wanted us to go on taxiway Y since we were parking. He then came back and said; 'XXX hold short of runway 4.' the aircraft was stopped but was past the hold bar; not protruding through the runway markings. I later told the controller he said ;'XXX go south on taxiway Y.' he then replied that he was speaking to another company's XXX; however; no company was named in the transmission.

Original NASA ASRS Text

Title: CRJ-100 FLT CREW HAS A RWY INCURSION AT DTW.

Narrative: WE LANDED ON RWY 4L IN DTW. ATC TAXI INSTRUCTIONS AFTER LNDG WERE; 'A7; S ON TXWY A; HOLD SHORT RWY 4R ON A5.' TAXI INSTRUCTIONS WERE UNDERSTOOD AND COMPLIED WITH. WE WERE HOLDING SHORT OF RWY 4R AT A5 FOR SEVERAL MINS. GND CTL FREQ WAS IN CTL OF THE FLT. THE GND FREQ WAS VERY CONGESTED. AFTER SEVERAL MINS OF HOLDING SHORT OR RWY 4R; I HEARD; 'ACR X TAXI S ON TXWY Y.' THE FO HEARD THE CLRNC ALSO AND REPLIED TO ATC; 'ACR X TAXI S ON TXWY Y.' I LOOKED TO THE APCH END OF RWY 4R AND SAW AN RJ THAT LOOKED TO BE HOLDING IN POS ON RWY 4. I APPLIED THRUST TO GET THE ACFT MOVING FORWARD. AT THE SAME TIME; I ASKED MY FO TO CLARIFY WITH ATC TO TAXI S OF TXWY Y AS THIS DIRECTION WAS AWAY FROM OUR INTENDED GATE. SIMULTANEOUSLY; I SAW THE RJ AT THE APCH END OF RWY 4R MOVING DOWN THE RWY AND I HEARD THE GND CTLR TELLING US TO STOP. THE ACFT DID PENETRATE THE HOLD SHORT LINE. IT DID NOT PENETRATE THE RWY EDGE. APPARENTLY THERE WAS ANOTHER XXX (SAME CALL SIGN NUMBER) ON THE SAME FREQ. I DID NOT HEAR A SPECIFIC CALL SIGN USED AND I ASSUMED THE 'XXX TAXI S ON TXWY Y' WAS FOR OUR FLT. I SHOULD HAVE IMMEDIATELY CLARIFIED WITH ATC THAT IT WAS 'XXX' THAT WAS CLRED TO CROSS RWY 4R AND TAXI S ON TXWY Y. THE RADIO CONGESTION ON THE FREQ WAS SUCH THAT ABBREVIATED XMISSIONS WERE BEING USED. UNFORTUNATELY; THIS ADDED TO THE INCIDENT. SUPPLEMENTAL INFO FROM ACN 698901: I CALLED GND AND ASKED WHAT DIRECTION HE WANTED US TO GO ON TXWY Y SINCE WE WERE PARKING. HE THEN CAME BACK AND SAID; 'XXX HOLD SHORT OF RWY 4.' THE ACFT WAS STOPPED BUT WAS PAST THE HOLD BAR; NOT PROTRUDING THROUGH THE RWY MARKINGS. I LATER TOLD THE CTLR HE SAID ;'XXX GO S ON TXWY Y.' HE THEN REPLIED THAT HE WAS SPEAKING TO ANOTHER COMPANY'S XXX; HOWEVER; NO COMPANY WAS NAMED IN THE XMISSION.

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.