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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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As the reporter responds to TCASII 'climb' descending through 7600 ft for 7000 ft the approach controller amended the reporter's altitude to maintain 8000 ft at smo. A jetstream BA3100 also assigned to 7000 ft at smo was the conflicting traffic.
| Attributes | |
| ACN | 327348 |
| Time | |
| Date | 199602 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : smo airport : lax |
| State Reference | CA |
| Altitude | msl bound lower : 7000 msl bound upper : 8000 |
| 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 other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Jetstream 31 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| 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 : 18000 flight time type : 700 |
| ASRS Report | 327348 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 500 vertical : 3000 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
We were cleared to cross smo VOR at or above 7000 ft, then descend to 2500 ft on a heading of 060 degrees from smo for our approach to lax. When approaching smo, and descending through 7600 ft, we had TA, 'traffic, traffic' about the same time socal approach told us to maintain 8000 ft. As I stopped the descent and started to climb, we had an RA 'monitor vertical speed' although both the first officer and myself thought we had heard one 'descend.' we acquired the BA31 jetstream flight both visually and on the TCASII screen as we climbed up to 8000 ft. After we passed beyond BA31 who was approaching us from our 1 O'clock position, level at 7000 ft, we were reclred to descend to 2500 ft. Apparently, socal had 2 airplanes cleared to smo at 7000 ft at about the same time. Fortunately, I was descending fairly slowly (around 1000 FPM) as I was trying to cross smo at or above 7000 ft without stopping my descent on to 2500 ft, and I was able to reverse descent quickly. Love TCASII!
Original NASA ASRS Text
Title: AS THE RPTR RESPONDS TO TCASII 'CLB' DSNDING THROUGH 7600 FT FOR 7000 FT THE APCH CTLR AMENDED THE RPTR'S ALT TO MAINTAIN 8000 FT AT SMO. A JETSTREAM BA3100 ALSO ASSIGNED TO 7000 FT AT SMO WAS THE CONFLICTING TFC.
Narrative: WE WERE CLRED TO CROSS SMO VOR AT OR ABOVE 7000 FT, THEN DSND TO 2500 FT ON A HDG OF 060 DEGS FROM SMO FOR OUR APCH TO LAX. WHEN APCHING SMO, AND DSNDING THROUGH 7600 FT, WE HAD TA, 'TFC, TFC' ABOUT THE SAME TIME SOCAL APCH TOLD US TO MAINTAIN 8000 FT. AS I STOPPED THE DSCNT AND STARTED TO CLB, WE HAD AN RA 'MONITOR VERT SPD' ALTHOUGH BOTH THE FO AND MYSELF THOUGHT WE HAD HEARD ONE 'DSND.' WE ACQUIRED THE BA31 JETSTREAM FLT BOTH VISUALLY AND ON THE TCASII SCREEN AS WE CLBED UP TO 8000 FT. AFTER WE PASSED BEYOND BA31 WHO WAS APCHING US FROM OUR 1 O'CLOCK POS, LEVEL AT 7000 FT, WE WERE RECLRED TO DSND TO 2500 FT. APPARENTLY, SOCAL HAD 2 AIRPLANES CLRED TO SMO AT 7000 FT AT ABOUT THE SAME TIME. FORTUNATELY, I WAS DSNDING FAIRLY SLOWLY (AROUND 1000 FPM) AS I WAS TRYING TO CROSS SMO AT OR ABOVE 7000 FT WITHOUT STOPPING MY DSCNT ON TO 2500 FT, AND I WAS ABLE TO REVERSE DSCNT QUICKLY. LOVE TCASII!
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.