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Norcal TRACON controller reported vectoring an aircraft below the minimum vectoring altitude.
| Attributes | |
| ACN | 1575043 |
| Time | |
| Date | 201809 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | NCT.TRACON |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 145 ER/LR |
| Flight Phase | Final Approach |
| Route In Use | Other Instrument Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 12 |
| Events | |
| Anomaly | ATC Issue All Types Inflight Event / Encounter CFTT / CFIT |
Narrative:
Aircraft X [was] cleared for the ILS runway 12R sjc. Aircraft Y was on an instrument approach rnp-Z runway 12R to sjc. Aircraft Z was on a go around from ILS runway 12R. I cleared aircraft X left turn to artaq (IAF) and cleared them for the ILS runway 12R. When I noticed their turn to artaq I switched aircraft X frequency to sjc tower. I was slowing aircraft Y down to follow aircraft X. I eventually slowed aircraft Y to slowest practical speed when I noticed aircraft X going through the ILS final for runway 12L towards aircraft Y on the rnp -Z. I had separation because aircraft Y was only descending to 3;000. I was watching to see if aircraft X would correct. Aircraft X started to parallel the final so I thought they had it. Then I noticed things get worse with aircraft X. I cancelled aircraft Y approach and issued an altitude and vector for a straight in approach to stay away from aircraft X. I coordinated with sjc tower for instruction for aircraft X.during this time aircraft Z went around runway 12L who was also on the ILS. I was vectoring aircraft Z back to the left downwind. During that time aircraft Y went into a 4;000 foot MVA at 3;000. When I noticed I turned aircraft Z to a lower MVA. When I realized the turn was too late I climbed aircraft Y to 4;000.[I asked] aircraft Z reason for go around they said it was an FMS problem. I vectored aircraft Z back for the ILS. When aircraft X was on final they said they were not picking up the ILS. I asked if they could switch to the rnp runway 12L. They tried and it was too late so I cancelled their approach and re-sequenced them for the rnp runway 12L approach. Aircraft X said their reason was that the ILS was not working. I do not know the situation with the ILS. Next time in low ceiling situation I will wait for my first aircraft to be established straight in on the ILS before transferring communications. I could have easily made aircraft X go around a cleaner operation.
Original NASA ASRS Text
Title: NorCal TRACON Controller reported vectoring an aircraft below the Minimum Vectoring Altitude.
Narrative: Aircraft X [was] cleared for the ILS Runway 12R SJC. Aircraft Y was on an instrument approach RNP-Z Runway 12R to SJC. Aircraft Z was on a go around from ILS Runway 12R. I cleared Aircraft X left turn to ARTAQ (IAF) and cleared them for the ILS Runway 12R. When I noticed their turn to ARTAQ I switched Aircraft X frequency to SJC tower. I was slowing Aircraft Y down to follow Aircraft X. I eventually slowed Aircraft Y to slowest practical speed when I noticed Aircraft X going through the ILS final for Runway 12L towards Aircraft Y on the RNP -Z. I had separation because Aircraft Y was only descending to 3;000. I was watching to see if Aircraft X would correct. Aircraft X started to parallel the final so I thought they had it. Then I noticed things get worse with Aircraft X. I cancelled Aircraft Y approach and issued an altitude and vector for a straight in approach to stay away from Aircraft X. I coordinated with SJC tower for instruction for Aircraft X.During this time Aircraft Z went around Runway 12L who was also on the ILS. I was vectoring Aircraft Z back to the left downwind. During that time Aircraft Y went into a 4;000 foot MVA at 3;000. When I noticed I turned Aircraft Z to a lower MVA. When I realized the turn was too late I climbed Aircraft Y to 4;000.[I asked] Aircraft Z reason for go around they said it was an FMS problem. I vectored Aircraft Z back for the ILS. When Aircraft X was on final they said they were not picking up the ILS. I asked if they could switch to the RNP Runway 12L. They tried and it was too late so I cancelled their approach and re-sequenced them for the RNP Runway 12L approach. Aircraft X said their reason was that the ILS was not working. I do not know the situation with the ILS. Next time in low ceiling situation I will wait for my first aircraft to be established straight in on the ILS before transferring communications. I could have easily made Aircraft X go around a cleaner operation.
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.