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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Miscom on altitude clearance. Flight crew heard 6000 ft and read it back, but then leveled when TCASII showed aircraft below. Controller said their altitude clearance was 7000 ft.
| Attributes | |
| ACN | 330320 |
| Time | |
| Date | 199603 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : fll |
| State Reference | FL |
| Altitude | msl bound lower : 6500 msl bound upper : 7000 |
| Aircraft 1 | |
| Controlling Facilities | tracon : mia |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 330320 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| ASRS Report | 330319 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Location: 15 mi wnw of fll. While on a vector to fll at 8000 ft, we received a clearance to what we understood as 6000 ft, which we read back, with a TA. The autoplt was engaged and we were observing the traffic on TCASII. Passing 7000 ft we noticed that the traffic had leveled off at 6000 ft, so we slowed our rate of descent as the TCASII gave us a TA. As we approached 6500 ft we leveled off as TCASII gave us a monitor vertical speed. At that point the controller said climb back to 7000 ft which he said was our clearance.
Original NASA ASRS Text
Title: MISCOM ON ALT CLRNC. FLC HEARD 6000 FT AND READ IT BACK, BUT THEN LEVELED WHEN TCASII SHOWED ACFT BELOW. CTLR SAID THEIR ALT CLRNC WAS 7000 FT.
Narrative: LOCATION: 15 MI WNW OF FLL. WHILE ON A VECTOR TO FLL AT 8000 FT, WE RECEIVED A CLRNC TO WHAT WE UNDERSTOOD AS 6000 FT, WHICH WE READ BACK, WITH A TA. THE AUTOPLT WAS ENGAGED AND WE WERE OBSERVING THE TFC ON TCASII. PASSING 7000 FT WE NOTICED THAT THE TFC HAD LEVELED OFF AT 6000 FT, SO WE SLOWED OUR RATE OF DSCNT AS THE TCASII GAVE US A TA. AS WE APCHED 6500 FT WE LEVELED OFF AS TCASII GAVE US A MONITOR VERT SPD. AT THAT POINT THE CTLR SAID CLB BACK TO 7000 FT WHICH HE SAID WAS OUR CLRNC.
Data retrieved from NASA's ASRS site as of July 2007 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.