Sjc controller described a taxi conflict event resulting in an abrupt stop by one of the aircraft; t...

Narrative:

Air carrier Y called ready for taxi to runway 30R. I instructed the aircraft to taxi via taxiways Z; H; Y to runway 30R. Immediately after; air carrier X called for taxi. I instructed that aircraft to taxi via taxiways Z; G; Y to runway 30R. As air carrier Y was making his turn from H to Y; air carrier X was starting his turn from Z onto G further down field. When air carrier Y became established on Y and saw air carrier X ahead of him; the pilot sped the aircraft's taxi speed up to pass the other aircraft. Air carrier X had to come to an abrupt halt on G to allow air carrier Y to pass. I had instructed neither aircraft to pass behind the other. As air carrier X reached the end of Y; the pilot reported that the previous abrupt halt had caused a cabin incident. I should have instructed one of the aircraft to pass behind the other to insure positive control on the taxiways. In this case; the sequence should have been the air carrier Y first and air carrier X second. This instruction should have been given when air carrier X initially called ready for taxi.

Original NASA ASRS Text

Title: SJC Controller described a taxi conflict event resulting in an abrupt stop by one of the aircraft; the reporter acknowledging more positive sequencing instructions should have been issued prior to the aircraft taxiing.

Narrative: Air Carrier Y called ready for taxi to Runway 30R. I instructed the aircraft to taxi via Taxiways Z; H; Y to Runway 30R. Immediately after; Air Carrier X called for taxi. I instructed that aircraft to taxi via Taxiways Z; G; Y to Runway 30R. As Air Carrier Y was making his turn from H to Y; Air Carrier X was starting his turn from Z onto G further down field. When Air Carrier Y became established on Y and saw Air Carrier X ahead of him; the pilot sped the aircraft's taxi speed up to pass the other aircraft. Air Carrier X had to come to an abrupt halt on G to allow Air Carrier Y to pass. I had instructed neither aircraft to pass behind the other. As Air Carrier X reached the end of Y; the pilot reported that the previous abrupt halt had caused a cabin incident. I should have instructed one of the aircraft to pass behind the other to insure positive control on the taxiways. In this case; the sequence should have been the Air Carrier Y first and Air Carrier X second. This instruction should have been given when Air Carrier X initially called ready for taxi.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	923088
Time
Date	201012
Local Time Of Day	1801-2400
Place
Locale Reference	SJC.Tower
State Reference	CA
Aircraft 1
Make Model Name	Regional Jet 700 ER/LR (CRJ700)
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Aircraft 2
Make Model Name	Medium Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Local
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Conflict Ground Conflict Less Severe Deviation - Procedural Clearance

Sjc controller described a taxi conflict event resulting in an abrupt stop by one of the aircraft; the reporter acknowledging more positive sequencing instructions should have been issued prior to the aircraft taxiing.