Flight crew of a cargo DC10 failed to hold short of one parallel runway during taxi to parking causing a commuter aircraft to go around. Complete misunderstanding with regard to the interpretation of the clearance since the flight crew believed when receiving the clearance that the controller would want them to hold short of the runway transgressed. They even read back the clearance slowly.

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Attributes
ACN	420910
Time
Date	199811
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : lax airport : lax
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : sql
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	ground other : taxi
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	landing : go around
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi pilot : flight engineer
Experience	flight time last 90 days : 120 flight time total : 8500 flight time type : 1800
ASRS Report	420910
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	incursion : runway
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We landed on north complex at lax (our ramp is on south complex). We were holding short of taxiway P (on taxiway B) waiting to cross runway 25L&right monitoring tower. Tower called and told us to hold short of runway 25L on taxiway P. (We now believe he meant runway 25R.) we repeated to tower instructions to hold short of runway 25L on taxiway P. As we approached runway 25R we were going to confirm clearance to cross runway 25R (being used for takeoff), but controller was too busy to get confirmation and we heard him clear aircraft Y into position and hold on runway 25R for a DC10 crossing downfield. While clearing runway 25R tower controller asked if we were holding short of runway 25R. We responded 'no' and noticed a commuter approaching behind us in the air (probably had taken off, but may have been going around). We never heard a clearance for anyone to take off or go around on runway 25R.

Original NASA ASRS Text

Title: FLC OF A CARGO DC10 FAILED TO HOLD SHORT OF ONE PARALLEL RWY DURING TAXI TO PARKING CAUSING A COMMUTER ACFT TO GO AROUND. COMPLETE MISUNDERSTANDING WITH REGARD TO THE INTERP OF THE CLRNC SINCE THE FLC BELIEVED WHEN RECEIVING THE CLRNC THAT THE CTLR WOULD WANT THEM TO HOLD SHORT OF THE RWY TRANSGRESSED. THEY EVEN READ BACK THE CLRNC SLOWLY.

Narrative: WE LANDED ON N COMPLEX AT LAX (OUR RAMP IS ON S COMPLEX). WE WERE HOLDING SHORT OF TXWY P (ON TXWY B) WAITING TO CROSS RWY 25L&R MONITORING TWR. TWR CALLED AND TOLD US TO HOLD SHORT OF RWY 25L ON TXWY P. (WE NOW BELIEVE HE MEANT RWY 25R.) WE REPEATED TO TWR INSTRUCTIONS TO HOLD SHORT OF RWY 25L ON TXWY P. AS WE APCHED RWY 25R WE WERE GOING TO CONFIRM CLRNC TO CROSS RWY 25R (BEING USED FOR TKOF), BUT CTLR WAS TOO BUSY TO GET CONFIRMATION AND WE HEARD HIM CLR ACFT Y INTO POS AND HOLD ON RWY 25R FOR A DC10 XING DOWNFIELD. WHILE CLRING RWY 25R TWR CTLR ASKED IF WE WERE HOLDING SHORT OF RWY 25R. WE RESPONDED 'NO' AND NOTICED A COMMUTER APCHING BEHIND US IN THE AIR (PROBABLY HAD TAKEN OFF, BUT MAY HAVE BEEN GOING AROUND). WE NEVER HEARD A CLRNC FOR ANYONE TO TAKE OFF OR GO AROUND ON RWY 25R.

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.