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Sct TRACON controller reported a developmental controller issued descent to an aircraft too early; which caused aircraft to violate the MVA rule.
| Attributes | |
| ACN | 1153442 |
| Time | |
| Date | 201402 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | SCT.TRACON |
| State Reference | CA |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Small Transport Low Wing 2 Turboprop Eng |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Descent |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Radar 20 Air Traffic Control Time Certified In Pos 1 (yrs) 3 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy |
Narrative:
Aircraft inbound to udd IFR. Developmental was busy working numerous IFR arrivals into psp. Aircraft was cleared down to 7;000 [ft] and assigned vector 110 for descent. Pilot kept asking for lower due to moderate turbulence descending out of 10;000 [ft]. The developmental responded that due to the MVA he could expect lower in 3 miles. The pilot then responded that he would need lower as soon as we could give him a descent. The developmental then issued a vector of 180 heading to get the aircraft out 7;000 MVA. When the aircraft was south of the 7;000 MVA; the developmental gave a descent clearance to 6;000 [ft] anticipating the aircraft would miss the next lower MVA of 6;500 [ft] into the 6;000 MVA 2 miles south of the 6;500 MVA. Unfortunately the aircraft clipped the 6;500 MVA at 6;200 [ft] on the descent. I discussed with the developmental that in the future when aircraft are getting bumped around and having problems holding altitude; to keep in mind that as soon as that descent clearance is issued the pilot will be quick with the descent. Hold off on the descent as long as possible. As on ojti; remain a little more aware of the developmental control instructions in adverse IFR conditions to ensure all MVA's are met.
Original NASA ASRS Text
Title: SCT TRACON Controller reported a Developmental Controller issued descent to an aircraft too early; which caused aircraft to violate the MVA rule.
Narrative: Aircraft inbound to UDD IFR. Developmental was busy working numerous IFR arrivals into PSP. Aircraft was cleared down to 7;000 [FT] and assigned vector 110 for descent. Pilot kept asking for lower due to moderate turbulence descending out of 10;000 [FT]. The developmental responded that due to the MVA he could expect lower in 3 miles. The pilot then responded that he would need lower as soon as we could give him a descent. The developmental then issued a vector of 180 heading to get the aircraft out 7;000 MVA. When the aircraft was south of the 7;000 MVA; the developmental gave a descent clearance to 6;000 [FT] anticipating the aircraft would miss the next lower MVA of 6;500 [FT] into the 6;000 MVA 2 miles south of the 6;500 MVA. Unfortunately the aircraft clipped the 6;500 MVA at 6;200 [FT] on the descent. I discussed with the developmental that in the future when aircraft are getting bumped around and having problems holding altitude; to keep in mind that as soon as that descent clearance is issued the pilot will be quick with the descent. Hold off on the descent as long as possible. As on OJTI; remain a little more aware of the developmental control instructions in adverse IFR conditions to ensure all MVA's are met.
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.