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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Attributes | |
ACN | 247274 |
Time | |
Date | 199304 |
Day | Wed |
Local Time Of Day | 0601 To 1200 |
Place | |
Locale Reference | atc facility : ord |
State Reference | IL |
Altitude | msl bound lower : 3000 msl bound upper : 4000 |
Environment | |
Light | Daylight |
Aircraft 1 | |
Controlling Facilities | tracon : ord |
Operator | common carrier : air carrier |
Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
Flight Phase | descent other |
Route In Use | enroute : on vectors |
Flight Plan | IFR |
Aircraft 2 | |
Operator | general aviation : personal |
Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
Flight Phase | cruise other |
Route In Use | enroute : direct |
Flight Plan | VFR |
Person 1 | |
Affiliation | government : faa |
Function | other personnel other |
Qualification | controller : radar |
ASRS Report | 247274 |
Person 2 | |
Affiliation | government : faa |
Function | controller : approach |
Qualification | controller : radar |
Events | |
Anomaly | altitude deviation : undershoot conflict : airborne less severe non adherence : clearance |
Independent Detector | aircraft equipment other aircraft equipment : unspecified |
Resolutory Action | flight crew : took evasive action |
Consequence | Other |
Miss Distance | horizontal : 12000 vertical : 2100 |
Supplementary | |
Primary Problem | Flight Crew Human Performance |
Air Traffic Incident | other |
Narrative:
Air carrier X was being vectored to runway 4R descending to 3000 ft with a VFR Y at 1900 ft below TCA at 1 O'clock and 2 mi. Air carrier X reports a RA climb and the controller advises the traffic is below 2000 ft (more than 1500 ft difference). Air carrier X climbs back to 4000 ft, then passes and descends again for the approach. Workload: low. Clearance deviation of 300 ft. Communication after the maneuver. The controller asked the pilot if his TCASII showed the target to be below 2000 ft. He indicated he did not observe that, only the climb.
Original NASA ASRS Text
Title: ACR X TCASII RA WITH VFR ACFT 1500 FT BELOW. EVASIVE ACTION TAKEN CLB.
Narrative: ACR X WAS BEING VECTORED TO RWY 4R DSNDING TO 3000 FT WITH A VFR Y AT 1900 FT BELOW TCA AT 1 O'CLOCK AND 2 MI. ACR X RPTS A RA CLB AND THE CTLR ADVISES THE TFC IS BELOW 2000 FT (MORE THAN 1500 FT DIFFERENCE). ACR X CLBS BACK TO 4000 FT, THEN PASSES AND DSNDS AGAIN FOR THE APCH. WORKLOAD: LOW. CLRNC DEV OF 300 FT. COM AFTER THE MANEUVER. THE CTLR ASKED THE PLT IF HIS TCASII SHOWED THE TARGET TO BE BELOW 2000 FT. HE INDICATED HE DID NOT OBSERVE THAT, ONLY THE CLB.
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.