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Corporate aircraft landing smo with sct described a conflict event when ATC mistakenly issued the wrong altitude assignment; ATC acknowledging the error.
| Attributes | |
| ACN | 1119847 |
| Time | |
| Date | 201310 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | SCT.TRACON |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Citationjet (C525/C526) - CJ I / II / III / IV |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Descent |
| Route In Use | STAR FERN5 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying |
| Qualification | Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Flight Instructor |
| Experience | Flight Crew Last 90 Days 17 Flight Crew Total 8000 Flight Crew Type 400 |
| Person 2 | |
| Function | Departure Approach |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict Deviation - Altitude Overshoot Deviation - Procedural Published Material / Policy |
| Miss Distance | Horizontal 5000 Vertical 500 |
Narrative:
We had just started a descent out of nine thousand feet for descent into smo. Going through seven thousand; ATC instructed us to start an immediate climb and turn left to avoid traffic. We had set 6 thousand in altitude alerter; and both of us recall that was the altitude assigned and read back. After complying with ATC instructions; ATC told us we were assigned seven thousand. We informed ATC we thought six thousand was assigned and that is what we recalled reading back. ATC did not dispute our readback; only that we were assigned seven thousand. All other communications with ATC were normal. Corrective actions from this experience are to be better disciplined about both pilots confirming altitude changes and reading them aloud. Also both pilots need to confirm what is set in the altitude selector. This will ensure that correct altitudes are put in the altitude selector and help avoid traffic conflicts.
Original NASA ASRS Text
Title: Corporate aircraft landing SMO with SCT described a conflict event when ATC mistakenly issued the wrong altitude assignment; ATC acknowledging the error.
Narrative: We had just started a descent out of nine thousand feet for descent into SMO. Going through seven thousand; ATC instructed us to start an immediate climb and turn left to avoid traffic. We had set 6 thousand in altitude alerter; and both of us recall that was the altitude assigned and read back. After complying with ATC instructions; ATC told us we were assigned seven thousand. We informed ATC we thought six thousand was assigned and that is what we recalled reading back. ATC did not dispute our readback; only that we were assigned seven thousand. All other communications with ATC were normal. Corrective actions from this experience are to be better disciplined about both pilots confirming altitude changes and reading them aloud. Also both pilots need to confirm what is set in the altitude selector. This will ensure that correct altitudes are put in the altitude selector and help avoid traffic conflicts.
Data retrieved from NASA's ASRS site as of July 2013 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.