B727 crew almost had a runway incursion at lax.

Attributes
ACN	473154
Time
Date	200005
Day	Sun
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : lax.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : commercial pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 80 flight time total : 9000 flight time type : 700
ASRS Report	473154
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine pilot : flight engineer
Experience	flight time last 90 days : 85 flight time type : 98
ASRS Report	473155
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance
Supplementary
Problem Areas	Flight Crew Human Performance Company
Primary Problem	Flight Crew Human Performance

Narrative:

While taxing (very short taxi) from cargo ramp to runway 25L instructed to hold short of taxiway F on taxiway a. Running checklist, first officer missed radio call by ground to taxi taxiway F. Captain answered call and heard taxi taxiway F across runway 25L&right. So was new and engrossed in running checklist and did not hear the call either. About to cross the runway 25L hold short line, first officer asked 'are we cleared across?' captain responded 'yes.' so responded 'don't know.' first officer called and 'understood cleared across runway 25L.' ground responded 'no, but now you are.' ground responded 'be more careful.' there was no traffic on runway 25L. Captain was taxiing very slowly, else we would have penetrated the runway. Supplemental information from acn 473155: cleared to taxi to runway 25L and cross runway 25R. I was running checklist and wasn't sure if we were cleared to cross runway 25L and taxi to the parallel. As a new flight engineer, I missed the last part of the radio transmission while computing data for runway 25L (changed from runway 25R to runway 25L) and completing the before takeoff check.

Original NASA ASRS Text

Title: B727 CREW ALMOST HAD A RWY INCURSION AT LAX.

Narrative: WHILE TAXING (VERY SHORT TAXI) FROM CARGO RAMP TO RWY 25L INSTRUCTED TO HOLD SHORT OF TXWY F ON TXWY A. RUNNING CHKLIST, FO MISSED RADIO CALL BY GND TO TAXI TXWY F. CAPT ANSWERED CALL AND HEARD TAXI TXWY F ACROSS RWY 25L&R. SO WAS NEW AND ENGROSSED IN RUNNING CHKLIST AND DID NOT HEAR THE CALL EITHER. ABOUT TO CROSS THE RWY 25L HOLD SHORT LINE, FO ASKED 'ARE WE CLRED ACROSS?' CAPT RESPONDED 'YES.' SO RESPONDED 'DON'T KNOW.' FO CALLED AND 'UNDERSTOOD CLRED ACROSS RWY 25L.' GND RESPONDED 'NO, BUT NOW YOU ARE.' GND RESPONDED 'BE MORE CAREFUL.' THERE WAS NO TFC ON RWY 25L. CAPT WAS TAXIING VERY SLOWLY, ELSE WE WOULD HAVE PENETRATED THE RWY. SUPPLEMENTAL INFO FROM ACN 473155: CLRED TO TAXI TO RWY 25L AND CROSS RWY 25R. I WAS RUNNING CHKLIST AND WASN'T SURE IF WE WERE CLRED TO CROSS RWY 25L AND TAXI TO THE PARALLEL. AS A NEW FE, I MISSED THE LAST PART OF THE RADIO XMISSION WHILE COMPUTING DATA FOR RWY 25L (CHANGED FROM RWY 25R TO RWY 25L) AND COMPLETING THE BEFORE TKOF CHK.

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.