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Aircraft descending towards tampa, fl, got an RA from TCASII. Followed the advisory, which called for a climb.
| Attributes | |
| ACN | 430754 |
| Time | |
| Date | 199902 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : 002.airport navaid : phk.vortac |
| State Reference | FL |
| Altitude | msl single value : 21500 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | L-1011-500 Series |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zma.artcc |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 20000 flight time type : 4000 |
| ASRS Report | 436754 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas |
| Resolutory Action | flight crew : took evasive action |
| Miss Distance | vertical : 600 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Descent started at FL370-FL350 with clearance to initially FL190, then changed to FL200 and then FL190. Also, several large heading changes occurred during descent (vectors of +/-90 degrees both left and right). During descent, a leveloff altitude never reached, a further clearance to 10000 ft was issued. Evasive action taken at approximately FL215 with TCASII advisory to climb. ATC apologized via radio for the problem. My gut feeling is that ATC had a target that was maneuvering and had no radio contact with for whatever reason.
Original NASA ASRS Text
Title: ACFT DSNDING TOWARDS TAMPA, FL, GOT AN RA FROM TCASII. FOLLOWED THE ADVISORY, WHICH CALLED FOR A CLB.
Narrative: DSCNT STARTED AT FL370-FL350 WITH CLRNC TO INITIALLY FL190, THEN CHANGED TO FL200 AND THEN FL190. ALSO, SEVERAL LARGE HDG CHANGES OCCURRED DURING DSCNT (VECTORS OF +/-90 DEGS BOTH L AND R). DURING DSCNT, A LEVELOFF ALT NEVER REACHED, A FURTHER CLRNC TO 10000 FT WAS ISSUED. EVASIVE ACTION TAKEN AT APPROX FL215 WITH TCASII ADVISORY TO CLB. ATC APOLOGIZED VIA RADIO FOR THE PROB. MY GUT FEELING IS THAT ATC HAD A TARGET THAT WAS MANEUVERING AND HAD NO RADIO CONTACT WITH FOR WHATEVER REASON.
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.