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Sfo tower controller reported a taxiing air carrier pilot reported taking evasive action to avoid another taxiing aircraft.
| Attributes | |
| ACN | 1512448 |
| Time | |
| Date | 201801 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | SFO.Tower |
| State Reference | CA |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Widebody Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Taxi |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Medium Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Taxi |
| Flight Plan | IFR |
| Person 1 | |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 18.0 |
| Events | |
| Anomaly | Conflict Ground Conflict Critical Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Ground Incursion Taxiway |
Narrative:
Ground control had issued aircraft X taxi instructions to the ramp and switched them over to ramp control a. Aircraft Y was taxiing to runway 1 right. Aircraft X should not have been a factor for aircraft Y; and was not observed going past H on B due to traffic and night conditions. Aircraft Y reported slamming on their brakes. This is a systemic issue in that M1 is a taxiway between a and F runway 1 left; as well as a taxi lane into the a ramp (the two lines are M1 & M2 into/out of the a ramp). Here is the assumption of what took place; aircraft X was told to enter the ramp via M1; so they took B to M1; then turned to join a to the ramp causing the conflict with aircraft Y who should have been long behind aircraft X at a and H.[suggest] change the lines into/out of the a ramp.
Original NASA ASRS Text
Title: SFO Tower Controller reported a taxiing air carrier pilot reported taking evasive action to avoid another taxiing aircraft.
Narrative: Ground Control had issued Aircraft X taxi instructions to the ramp and switched them over to ramp control A. Aircraft Y was taxiing to Runway 1 Right. Aircraft X should not have been a factor for Aircraft Y; and was not observed going past H on B due to traffic and night conditions. Aircraft Y reported slamming on their brakes. This is a systemic issue in that M1 is a taxiway between A and F Runway 1 Left; as well as a taxi lane into the A ramp (the two lines are M1 & M2 into/out of the A ramp). Here is the assumption of what took place; Aircraft X was told to enter the ramp via M1; so they took B to M1; then turned to join A to the ramp causing the conflict with Aircraft Y who should have been long behind Aircraft X at A and H.[Suggest] change the lines into/out of the A ramp.
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.