Las ground controller described incident when intrafac coordination was confused causing a potential...

Attributes
ACN	757664
Time
Date	200710
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : las.airport
State Reference	NV
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	HS 125 Series
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : las.tower
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : ground
Qualification	controller : radar
Experience	controller limited radar : 20 controller radar : 2 controller time certified in position1 : 4
ASRS Report	757664
Events
Anomaly	conflict : ground less severe
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure

Narrative:

I was on position at ground control west (gcw); a trainee/developmental was receiving a proficiency skill check on local control two (LC2). An HS25 was holding short of runway 19L at taxiway south. A B737 was on runway 19L; a BE36 was on final approach to runway 19R. I coordinated to cross runway 19L (east to west) after the B737 departure and to cross runway 19R after the bonanza arrival. Upon observing the B737 roll past taxiway south; I instructed the biz jet to cross runway 19L and hold short of runway 19R (for the BE36 arrival). The supervisor performing the skill check heard my instructions to the biz jet; and proceeded to tell me to hold the jet short (of runway 19L). I attempted to stop the biz aircraft however; the transmission was too late. The biz jet had proceeded across the runway hold lines. I later discovered that another B737 was 'cleared for takeoff' on runway 19L from intersection left. I believe the LC2 controller then proceeded to cancel the second B737 takeoff clearance and instructed the first B737 to 'taxi into position and hold.' the biz jet had already completed crossing runway 19L prior to the second B737 holding on the runway.

Original NASA ASRS Text

Title: LAS GND CTLR DESCRIBED INCIDENT WHEN INTRAFAC COORD WAS CONFUSED CAUSING A POTENTIAL GND CONFLICT.

Narrative: I WAS ON POS AT GND CTL W (GCW); A TRAINEE/DEVELOPMENTAL WAS RECEIVING A PROFICIENCY SKILL CHK ON LCL CTL TWO (LC2). AN HS25 WAS HOLDING SHORT OF RWY 19L AT TXWY S. A B737 WAS ON RWY 19L; A BE36 WAS ON FINAL APCH TO RWY 19R. I COORDINATED TO CROSS RWY 19L (E TO W) AFTER THE B737 DEP AND TO CROSS RWY 19R AFTER THE BONANZA ARR. UPON OBSERVING THE B737 ROLL PAST TXWY S; I INSTRUCTED THE BIZ JET TO CROSS RWY 19L AND HOLD SHORT OF RWY 19R (FOR THE BE36 ARR). THE SUPVR PERFORMING THE SKILL CHK HEARD MY INSTRUCTIONS TO THE BIZ JET; AND PROCEEDED TO TELL ME TO HOLD THE JET SHORT (OF RWY 19L). I ATTEMPTED TO STOP THE BIZ ACFT HOWEVER; THE XMISSION WAS TOO LATE. THE BIZ JET HAD PROCEEDED ACROSS THE RWY HOLD LINES. I LATER DISCOVERED THAT ANOTHER B737 WAS 'CLRED FOR TKOF' ON RWY 19L FROM INTXN L. I BELIEVE THE LC2 CTLR THEN PROCEEDED TO CANCEL THE SECOND B737 TKOF CLRNC AND INSTRUCTED THE FIRST B737 TO 'TAXI INTO POS AND HOLD.' THE BIZ JET HAD ALREADY COMPLETED XING RWY 19L PRIOR TO THE SECOND B737 HOLDING ON THE RWY.

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.

Las ground controller described incident when intrafac coordination was confused causing a potential ground conflict.