 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Flight crew of B757 has TCASII RA and descends only to find themselves head on with traffic at another airport. A climb RA is received and they climb.
| Attributes | |
| ACN | 387512 |
| Time | |
| Date | 199711 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : smo airport : lax |
| State Reference | CA |
| Altitude | msl bound lower : 2100 msl bound upper : 2500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax |
| 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 |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 10000 flight time type : 1000 |
| ASRS Report | 387512 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : nmac other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | vertical : 500 |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
On vectors to lax north complex (runway 24) my B757 was on autoflt, flaps 20 degrees, speed 160 KTS, 2500 ft MSL, just starting right base turn when TCASII gave sudden RA to 'descend now.' autoflt was disconnected immediately and descent begun with guidance from vsi. Once clear of conflict (altitude loss 400 ft) we received an immediate climb resolution due to now being head-on with traffic on approach to another lax area airport. (We believe the other aircraft was inbound to smo airport.) manual thrust was applied along with a climb to clear this climb resolution. Approach was continued with a close-in ILS runway change to a successful landing at lax. Bottom line: a false TCASII resolution put our aircraft into a real traffic conflict and resolution. This is the second false resolution I have experienced in our B757 aircraft in 8 months time.
Original NASA ASRS Text
Title: FLC OF B757 HAS TCASII RA AND DSNDS ONLY TO FIND THEMSELVES HEAD ON WITH TFC AT ANOTHER ARPT. A CLB RA IS RECEIVED AND THEY CLB.
Narrative: ON VECTORS TO LAX N COMPLEX (RWY 24) MY B757 WAS ON AUTOFLT, FLAPS 20 DEGS, SPD 160 KTS, 2500 FT MSL, JUST STARTING R BASE TURN WHEN TCASII GAVE SUDDEN RA TO 'DSND NOW.' AUTOFLT WAS DISCONNECTED IMMEDIATELY AND DSCNT BEGUN WITH GUIDANCE FROM VSI. ONCE CLR OF CONFLICT (ALT LOSS 400 FT) WE RECEIVED AN IMMEDIATE CLB RESOLUTION DUE TO NOW BEING HEAD-ON WITH TFC ON APCH TO ANOTHER LAX AREA ARPT. (WE BELIEVE THE OTHER ACFT WAS INBOUND TO SMO ARPT.) MANUAL THRUST WAS APPLIED ALONG WITH A CLB TO CLR THIS CLB RESOLUTION. APCH WAS CONTINUED WITH A CLOSE-IN ILS RWY CHANGE TO A SUCCESSFUL LNDG AT LAX. BOTTOM LINE: A FALSE TCASII RESOLUTION PUT OUR ACFT INTO A REAL TFC CONFLICT AND RESOLUTION. THIS IS THE SECOND FALSE RESOLUTION I HAVE EXPERIENCED IN OUR B757 ACFT IN 8 MONTHS TIME.
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.