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A B737 flight on a simultaneous parallel approach, runways 25L and 24R, descends in accord with a TCASII RA and goes below the altitude crossing restr set for hunda intersection east of lax, ca.
| Attributes | |
| ACN | 584643 |
| Time | |
| Date | 200306 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | intersection : hunda |
| State Reference | CA |
| Altitude | msl bound lower : 3200 msl bound upper : 3500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 25l other |
| Flight Phase | descent : approach descent : intermediate altitude |
| Route In Use | approach : instrument precision arrival : profile descent |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 584643 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met altitude deviation : overshoot conflict : airborne critical non adherence : clearance non adherence : published procedure other anomaly other |
| Independent Detector | aircraft equipment : tcas |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Miss Distance | horizontal : 6000 vertical : 400 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Airspace Structure Airport ATC Human Performance |
| Primary Problem | Airspace Structure |
Narrative:
On ILS runway 25L approach at lax between gaate and hunda intxns we received 'descend' TCASII RA. We were on the VNAV path in IMC conditions. We told socal approach we were descending in response to an RA without regard to required altitudes. Socal responded that we had traffic on a 'close parallel approach' and that our descent was approved. We were about 1/2 DOT below GS prior to hunda. I don't know if we were below 3500 ft prior to hunda or 3200 ft prior to GS. We were in visual conditions prior to limma and could see the source of our continuing RA. An aircraft apparently well established on approach to runway 24R. The TCASII displayed a red diamond 400 ft above us, abeam, to the right. The TCASII guidance took us to 1/3 to 1/2 DOT low until it went away at approximately 1000 ft.
Original NASA ASRS Text
Title: A B737 FLT ON A SIMULTANEOUS PARALLEL APCH, RWYS 25L AND 24R, DSNDS IN ACCORD WITH A TCASII RA AND GOES BELOW THE ALT XING RESTR SET FOR HUNDA INTXN E OF LAX, CA.
Narrative: ON ILS RWY 25L APCH AT LAX BTWN GAATE AND HUNDA INTXNS WE RECEIVED 'DSND' TCASII RA. WE WERE ON THE VNAV PATH IN IMC CONDITIONS. WE TOLD SOCAL APCH WE WERE DSNDING IN RESPONSE TO AN RA WITHOUT REGARD TO REQUIRED ALTS. SOCAL RESPONDED THAT WE HAD TFC ON A 'CLOSE PARALLEL APCH' AND THAT OUR DSCNT WAS APPROVED. WE WERE ABOUT 1/2 DOT BELOW GS PRIOR TO HUNDA. I DON'T KNOW IF WE WERE BELOW 3500 FT PRIOR TO HUNDA OR 3200 FT PRIOR TO GS. WE WERE IN VISUAL CONDITIONS PRIOR TO LIMMA AND COULD SEE THE SOURCE OF OUR CONTINUING RA. AN ACFT APPARENTLY WELL ESTABLISHED ON APCH TO RWY 24R. THE TCASII DISPLAYED A RED DIAMOND 400 FT ABOVE US, ABEAM, TO THE R. THE TCASII GUIDANCE TOOK US TO 1/3 TO 1/2 DOT LOW UNTIL IT WENT AWAY AT APPROX 1000 FT.
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.