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Flight crew of an light transport failed to follow the STAR during approach due to starting descent prior to an assigned crossing fix.
| Attributes | |
| ACN | 337855 |
| Time | |
| Date | 199606 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : lax |
| State Reference | CA |
| Altitude | msl bound lower : 3200 msl bound upper : 3500 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax tower : phl |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent : approach |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | other other : other pilot : atp |
| Experience | flight time last 90 days : 84 flight time total : 3300 flight time type : 81 |
| ASRS Report | 337855 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met altitude deviation : overshoot conflict : airborne less severe non adherence : clearance non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 4500 vertical : 1000 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Descent clearance into lax we were issued a clearance to cross hunda intersection at 3500 ft on the localizer. The descent out of 3500 ft began at 14.2 DME vice 12.2 DME (hunda) as charted. A misreading of the chart was caused by a distraction of a B757 ahead of our flight on the same approach and traffic proximity of a B737 off of our right wing on an approach to the parallel runway. We were in VMC during the approach until 1700 ft. At 3200 ft we were told to maintain our current altitude until hunda. It was at this point I realized the mistake. After landing at lax we were told to contact the supervisor at TRACON. Upon arrival at the gate he informed us that we had decreased the vertical separation between the parallel traffic on the north complex and that he had to file a report.
Original NASA ASRS Text
Title: FLC OF AN LTT FAILED TO FOLLOW THE STAR DURING APCH DUE TO STARTING DSCNT PRIOR TO AN ASSIGNED XING FIX.
Narrative: DSCNT CLRNC INTO LAX WE WERE ISSUED A CLRNC TO CROSS HUNDA INTXN AT 3500 FT ON THE LOC. THE DSCNT OUT OF 3500 FT BEGAN AT 14.2 DME VICE 12.2 DME (HUNDA) AS CHARTED. A MISREADING OF THE CHART WAS CAUSED BY A DISTR OF A B757 AHEAD OF OUR FLT ON THE SAME APCH AND TFC PROX OF A B737 OFF OF OUR R WING ON AN APCH TO THE PARALLEL RWY. WE WERE IN VMC DURING THE APCH UNTIL 1700 FT. AT 3200 FT WE WERE TOLD TO MAINTAIN OUR CURRENT ALT UNTIL HUNDA. IT WAS AT THIS POINT I REALIZED THE MISTAKE. AFTER LNDG AT LAX WE WERE TOLD TO CONTACT THE SUPVR AT TRACON. UPON ARR AT THE GATE HE INFORMED US THAT WE HAD DECREASED THE VERT SEPARATION BTWN THE PARALLEL TFC ON THE N COMPLEX AND THAT HE HAD TO FILE A RPT.
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.