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Socal TRACON controller reported a bad readback from a pilot which caused an instantaneous airspace violation.
| Attributes | |
| ACN | 1465955 |
| Time | |
| Date | 201707 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | SCT.TRACON |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | Small Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| 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) 4 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Deviation - Track / Heading All Types Inflight Event / Encounter CFTT / CFIT |
Narrative:
Training in progress. Aircraft was on arrival into sna at 080. We issued a descend clearance to 060 and speed of 190kts. Aircraft read back '60 to a 190'. Aircraft then turned to a 190 heading directly into an MVA of 079 descending out of 080. The proximity of the boundary line to the arrival was less than 1 mile; given us not time to fix the situation until it was too late. We observed the turn and issued a stop descend; low altitude alert; and climb back to 080 immediately. Be more vigilant in verifying the correct read back when doubt occurs because of the proximity of the higher MVA.
Original NASA ASRS Text
Title: SoCal TRACON Controller reported a bad readback from a pilot which caused an instantaneous airspace violation.
Narrative: Training in progress. Aircraft was on arrival into SNA at 080. We issued a descend clearance to 060 and speed of 190kts. Aircraft read back '60 to a 190'. Aircraft then turned to a 190 heading directly into an MVA of 079 descending out of 080. The proximity of the boundary line to the arrival was less than 1 mile; given us not time to fix the situation until it was too late. We observed the turn and issued a stop descend; low altitude alert; and climb back to 080 immediately. Be more vigilant in verifying the correct read back when doubt occurs because of the proximity of the higher MVA.
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.