 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier X TCASII RA had near midair collision possible less than standard separation with aircraft Y. Evasive action taken climb.
| Attributes | |
| ACN | 299967 |
| Time | |
| Date | 199503 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : sna |
| State Reference | CA |
| Altitude | msl bound lower : 4000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sna |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach 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 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 10000 flight time type : 200 |
| ASRS Report | 299967 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : undershoot conflict : nmac non adherence : clearance non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 500 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Air carrier X (B-757) slc-sna. Socal approach issued left turn to 270 degrees and descent to 3000 ft. Passing approximately 4000 ft approach issued right turn to 330 degrees 'for traffic avoidance.' within seconds a TCASII RA occurred directing a climb requiring a 2000-2500 FPM rate. Approach control was immediately advised of TCASII evasive maneuver by PNF (captain) as the maneuver was in progress. Traffic was never visually sighted. Recovery from the 'clear of conflict' message was accomplished at about 6000 ft. Socal approach issued instructions for an intercept vector to ILS runway 19R at sna. Normal approach and landing were accomplished. It was my impression that due to controller error we were vectored into the path of known IFR traffic. TCASII answered to break the chain of events which would have otherwise ended in disaster.
Original NASA ASRS Text
Title: ACR X TCASII RA HAD NMAC POSSIBLE LTSS WITH ACFT Y. EVASIVE ACTION TAKEN CLB.
Narrative: ACR X (B-757) SLC-SNA. SOCAL APCH ISSUED L TURN TO 270 DEGS AND DSCNT TO 3000 FT. PASSING APPROX 4000 FT APCH ISSUED R TURN TO 330 DEGS 'FOR TFC AVOIDANCE.' WITHIN SECONDS A TCASII RA OCCURRED DIRECTING A CLB REQUIRING A 2000-2500 FPM RATE. APCH CTL WAS IMMEDIATELY ADVISED OF TCASII EVASIVE MANEUVER BY PNF (CAPT) AS THE MANEUVER WAS IN PROGRESS. TFC WAS NEVER VISUALLY SIGHTED. RECOVERY FROM THE 'CLR OF CONFLICT' MESSAGE WAS ACCOMPLISHED AT ABOUT 6000 FT. SOCAL APCH ISSUED INSTRUCTIONS FOR AN INTERCEPT VECTOR TO ILS RWY 19R AT SNA. NORMAL APCH AND LNDG WERE ACCOMPLISHED. IT WAS MY IMPRESSION THAT DUE TO CTLR ERROR WE WERE VECTORED INTO THE PATH OF KNOWN IFR TFC. TCASII ANSWERED TO BREAK THE CHAIN OF EVENTS WHICH WOULD HAVE OTHERWISE ENDED IN DISASTER.
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.