 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Flight crew of an mdt air carrier aircraft descended prematurely during a visual approach resulting in evasive action in responding to a TCASII advisory only.
| Attributes | |
| ACN | 271956 |
| Time | |
| Date | 199403 |
| Place | |
| Locale Reference | airport : hpn |
| State Reference | NY |
| Altitude | msl bound lower : 2700 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : n(0 |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 12000 flight time type : 3400 |
| ASRS Report | 271956 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : published procedure non adherence : clearance other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | unspecified : 6000 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
We received radar vectors from rymes intersection toward the long island sound. When we told ny approach we had white plains in sight, he cleared us for the sound visual (34) approach, maintain 3000. Once we were off shore, on base we started descent to 2000 ft (GS intercept for ILS 34 used as reference). As we started our descent we picked up a TCASII TA at 11-11:30 at 500 ft below us. We had not been advised of traffic by approach but we stopped descent at about 2700 ft before we flew into a RA situation. I told approach control that we were climbing back to 3000 ft. He said we should still be at 3000 ft. Both pilots agreed that, according to the plate, once cleared for approach on base off shore we could descend. I talked to the ny approach supervisor and he agreed with us, but said the radar plot may not have shown us where we thought we were and he would talk to the controller. Plates like this are vague at best and open to interpretation of position. Can they be made more specific, i.e. DME and radial of greenwich point and great captain island. Shouldn't we have been advised of VFR traffic? No reports were filed. TCASII RA did not take place so no TCASII report filed.
Original NASA ASRS Text
Title: FLC OF AN MDT ACR ACFT DSNDED PREMATURELY DURING A VISUAL APCH RESULTING IN EVASIVE ACTION IN RESPONDING TO A TCASII ADVISORY ONLY.
Narrative: WE RECEIVED RADAR VECTORS FROM RYMES INTXN TOWARD THE LONG ISLAND SOUND. WHEN WE TOLD NY APCH WE HAD WHITE PLAINS IN SIGHT, HE CLRED US FOR THE SOUND VISUAL (34) APCH, MAINTAIN 3000. ONCE WE WERE OFF SHORE, ON BASE WE STARTED DSCNT TO 2000 FT (GS INTERCEPT FOR ILS 34 USED AS REF). AS WE STARTED OUR DSCNT WE PICKED UP A TCASII TA AT 11-11:30 AT 500 FT BELOW US. WE HAD NOT BEEN ADVISED OF TFC BY APCH BUT WE STOPPED DSCNT AT ABOUT 2700 FT BEFORE WE FLEW INTO A RA SIT. I TOLD APCH CTL THAT WE WERE CLBING BACK TO 3000 FT. HE SAID WE SHOULD STILL BE AT 3000 FT. BOTH PLTS AGREED THAT, ACCORDING TO THE PLATE, ONCE CLRED FOR APCH ON BASE OFF SHORE WE COULD DSND. I TALKED TO THE NY APCH SUPVR AND HE AGREED WITH US, BUT SAID THE RADAR PLOT MAY NOT HAVE SHOWN US WHERE WE THOUGHT WE WERE AND HE WOULD TALK TO THE CTLR. PLATES LIKE THIS ARE VAGUE AT BEST AND OPEN TO INTERP OF POS. CAN THEY BE MADE MORE SPECIFIC, I.E. DME AND RADIAL OF GREENWICH POINT AND GREAT CAPT ISLAND. SHOULDN'T WE HAVE BEEN ADVISED OF VFR TFC? NO RPTS WERE FILED. TCASII RA DID NOT TAKE PLACE SO NO TCASII RPT FILED.
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.