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Air carrier X descent to occupied altitude had less than standard separation from aircraft at occupied altitude. TCASII RA climb. System error.
| Attributes | |
| ACN | 304631 |
| Time | |
| Date | 199505 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : vcn |
| State Reference | PA |
| Altitude | msl bound lower : 7000 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : phl |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 18000 flight time type : 13000 |
| ASRS Report | 304631 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : undershoot conflict : airborne less severe non adherence : clearance non adherence : required legal separation non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
We received a heading from phl approach of 350 degree after passing the vcn VOR. We also received a clearance to descend to 6000 ft. As we passed about 7000 ft we received a TCASII RA to climb. We climbed aggressively back to 8000 ft and notified ATC that we were 8000 ft taking corrective action. We then received a clearance to descend to 7000 ft. Phl approach realized their mistake and another controller took over. We continued on to a safe landing. In their zest to cover their mistake, they really wanted us to feel like we were receiving expedited handling to the runway. Because of this, we were vectored right behind a B757 'heavy' for a visual approach. We were much too close for wake turbulence avoidance, so we received additional vectors until normal separation was complete. We did our own wake turbulence avoidance. This was simply an ATC mistake, we followed our altitude awareness procedures to the letter.
Original NASA ASRS Text
Title: ACR X DSCNT TO OCCUPIED ALT HAD LTSS FROM ACFT AT OCCUPIED ALT. TCASII RA CLB. SYS ERROR.
Narrative: WE RECEIVED A HDG FROM PHL APCH OF 350 DEG AFTER PASSING THE VCN VOR. WE ALSO RECEIVED A CLRNC TO DSND TO 6000 FT. AS WE PASSED ABOUT 7000 FT WE RECEIVED A TCASII RA TO CLB. WE CLBED AGGRESSIVELY BACK TO 8000 FT AND NOTIFIED ATC THAT WE WERE 8000 FT TAKING CORRECTIVE ACTION. WE THEN RECEIVED A CLRNC TO DSND TO 7000 FT. PHL APCH REALIZED THEIR MISTAKE AND ANOTHER CTLR TOOK OVER. WE CONTINUED ON TO A SAFE LNDG. IN THEIR ZEST TO COVER THEIR MISTAKE, THEY REALLY WANTED US TO FEEL LIKE WE WERE RECEIVING EXPEDITED HANDLING TO THE RWY. BECAUSE OF THIS, WE WERE VECTORED RIGHT BEHIND A B757 'HVY' FOR A VISUAL APCH. WE WERE MUCH TOO CLOSE FOR WAKE TURB AVOIDANCE, SO WE RECEIVED ADDITIONAL VECTORS UNTIL NORMAL SEPARATION WAS COMPLETE. WE DID OUR OWN WAKE TURB AVOIDANCE. THIS WAS SIMPLY AN ATC MISTAKE, WE FOLLOWED OUR ALT AWARENESS PROCS TO THE LETTER.
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.