Air carrier flight crew reported being cleared to cross runway 25R at lax; but made an incorrect tur...

Attributes
ACN	1346948
Time
Date	201604
Local Time Of Day	1201-1800
Place
Locale Reference	LAX.Airport
State Reference	CA
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Large Transport
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 171
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 140 Flight Crew Type 140
Events
Anomaly	Deviation - Procedural Clearance Ground Incursion Runway

Narrative:

We were instructed to cross runway 25R on taxiway P and turn left onto parallel taxiway B. While I was reading back instructions to ground control; captain turned left onto runway 25R. I tried to motion him to stop the turn and continue straight across on P; but by time he realized his mistake we were too far into the turn. We continued down the runway to the next intersection (taxiway T) and exited there.I should have stopped my communications with ground control to verbally alert the captain. He would have most likely responded more quickly to my verbal communication than he did to my gestures.

Original NASA ASRS Text

Title: Air carrier flight crew reported being cleared to cross Runway 25R at LAX; but made an incorrect turn and ended up on the runway. They exited at the next intersection.

Narrative: We were instructed to cross Runway 25R on Taxiway P and turn left onto parallel Taxiway B. While I was reading back instructions to Ground Control; Captain turned left onto Runway 25R. I tried to motion him to stop the turn and continue straight across on P; but by time he realized his mistake we were too far into the turn. We continued down the runway to the next intersection (Taxiway T) and exited there.I should have stopped my communications with Ground Control to verbally alert the Captain. He would have most likely responded more quickly to my verbal communication than he did to my gestures.

Data retrieved from NASA's ASRS site 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.

Air carrier flight crew reported being cleared to cross runway 25R at lax; but made an incorrect turn and ended up on the runway. They exited at the next intersection.