Narrative:

Air carrier X was cleared to taxi in an expedited manner to the #1 position on runway 1L at sfo airport. We did so and while completing our checklist, I noticed another air carrier Y taxiing rapidly on the parallel taxiway to my left. Thinking that I had the right-of-way and that the other aircraft would slow down, I continued to taxi. When I entered the intersection just prior to the runway it suddenly became obvious that the other aircraft had no intention of stopping and so I immediately slammed on the brakes. The other aircraft made a high speed turn onto the runway, narrowly missing our aircraft and proceeded to takeoff. I feel that if I had not stopped, a collision would have been imminent. After questioning ground control, I found out that the other aircraft missed the previous intersection. Conclusion: 2 airplanes were heading for the same spot, both thinking that they were cleared. 1 aircraft was on tower and the other was on ground frequency so they couldn't talk to each other. Had we not stopped, a serious problem could have occurred. Supplemental information from acn 198143: as first officer on air carrier X at sfo (destination los angeles) I switched from our ramp control to ground control and we were told to expedite to runway 1L and that we were #1 for the runway. We were aware that air carrier Y was also coming from a different gate area for an la departure. As we approached the runway I was busy with the checklist and just prior to crossing the outer taxiway I switched to tower frequency. We had not heard any talking on tower and were within 20 ft of making a normal stop at the hold line when the captain said something and came to a sudden stop. I looked to the left and saw a nose of air carrier Y coming from our left rear, passing very close to our nose. I fully expected his wing tip to collide with ours and was surprised to see his wing pass within 10 ft of our cockpit. The air carrier Y jet never seemed to slow down and continued onto the runway and took off. The captain called ground who said that air carrier Y was told to take the runway at H (1 turn before M where we were). It seems highly unlikely that neither air carrier Y pilot saw us. It was a clear night and our lights were on. They may have been very intent on following the imbedded green taxiway lighting which they were exactly over when they passed us. I find it difficult to believe that they would intentionally get that close to another aircraft. Before continuing our takeoff, the captain had to calm the fears of the passenger on the left side, most of whom saw the incident and were pointing it out to the flight attendants, one of whom also thought we would be hit and took the crash position. Needless to say, we all need to keep our eyes outside the aircraft while the aircraft is in motion.

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Original NASA ASRS Text

Title: ACR X NEAR GND COLLISION WITH ACR Y. EVASIVE ACTION TAKEN EMER STOP.

Narrative: ACR X WAS CLRED TO TAXI IN AN EXPEDITED MANNER TO THE #1 POS ON RWY 1L AT SFO ARPT. WE DID SO AND WHILE COMPLETING OUR CHKLIST, I NOTICED ANOTHER ACR Y TAXIING RAPIDLY ON THE PARALLEL TAXIWAY TO MY L. THINKING THAT I HAD THE RIGHT-OF-WAY AND THAT THE OTHER ACFT WOULD SLOW DOWN, I CONTINUED TO TAXI. WHEN I ENTERED THE INTXN JUST PRIOR TO THE RWY IT SUDDENLY BECAME OBVIOUS THAT THE OTHER ACFT HAD NO INTENTION OF STOPPING AND SO I IMMEDIATELY SLAMMED ON THE BRAKES. THE OTHER ACFT MADE A HIGH SPD TURN ONTO THE RWY, NARROWLY MISSING OUR ACFT AND PROCEEDED TO TKOF. I FEEL THAT IF I HAD NOT STOPPED, A COLLISION WOULD HAVE BEEN IMMINENT. AFTER QUESTIONING GND CTL, I FOUND OUT THAT THE OTHER ACFT MISSED THE PREVIOUS INTXN. CONCLUSION: 2 AIRPLANES WERE HDG FOR THE SAME SPOT, BOTH THINKING THAT THEY WERE CLRED. 1 ACFT WAS ON TWR AND THE OTHER WAS ON GND FREQ SO THEY COULDN'T TALK TO EACH OTHER. HAD WE NOT STOPPED, A SERIOUS PROBLEM COULD HAVE OCCURRED. SUPPLEMENTAL INFO FROM ACN 198143: AS FO ON ACR X AT SFO (DEST LOS ANGELES) I SWITCHED FROM OUR RAMP CTL TO GND CTL AND WE WERE TOLD TO EXPEDITE TO RWY 1L AND THAT WE WERE #1 FOR THE RWY. WE WERE AWARE THAT ACR Y WAS ALSO COMING FROM A DIFFERENT GATE AREA FOR AN LA DEP. AS WE APCHED THE RWY I WAS BUSY WITH THE CHKLIST AND JUST PRIOR TO XING THE OUTER TAXIWAY I SWITCHED TO TWR FREQ. WE HAD NOT HEARD ANY TALKING ON TWR AND WERE WITHIN 20 FT OF MAKING A NORMAL STOP AT THE HOLD LINE WHEN THE CAPT SAID SOMETHING AND CAME TO A SUDDEN STOP. I LOOKED TO THE L AND SAW A NOSE OF ACR Y COMING FROM OUR L REAR, PASSING VERY CLOSE TO OUR NOSE. I FULLY EXPECTED HIS WING TIP TO COLLIDE WITH OURS AND WAS SURPRISED TO SEE HIS WING PASS WITHIN 10 FT OF OUR COCKPIT. THE ACR Y JET NEVER SEEMED TO SLOW DOWN AND CONTINUED ONTO THE RWY AND TOOK OFF. THE CAPT CALLED GND WHO SAID THAT ACR Y WAS TOLD TO TAKE THE RWY AT H (1 TURN BEFORE M WHERE WE WERE). IT SEEMS HIGHLY UNLIKELY THAT NEITHER ACR Y PLT SAW US. IT WAS A CLR NIGHT AND OUR LIGHTS WERE ON. THEY MAY HAVE BEEN VERY INTENT ON FOLLOWING THE IMBEDDED GREEN TAXIWAY LIGHTING WHICH THEY WERE EXACTLY OVER WHEN THEY PASSED US. I FIND IT DIFFICULT TO BELIEVE THAT THEY WOULD INTENTIONALLY GET THAT CLOSE TO ANOTHER ACFT. BEFORE CONTINUING OUR TKOF, THE CAPT HAD TO CALM THE FEARS OF THE PAX ON THE L SIDE, MOST OF WHOM SAW THE INCIDENT AND WERE POINTING IT OUT TO THE FLT ATTENDANTS, ONE OF WHOM ALSO THOUGHT WE WOULD BE HIT AND TOOK THE CRASH POS. NEEDLESS TO SAY, WE ALL NEED TO KEEP OUR EYES OUTSIDE THE ACFT WHILE THE ACFT IS IN MOTION.

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.