 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
ATCT controller at lax states that the TRACON is allowing B757 aircraft to pass traffic on the parallel runway causing a wake turbulence event.
| Attributes | |
| ACN | 410993 |
| Time | |
| Date | 199807 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : lax |
| State Reference | CA |
| Altitude | msl bound lower : 2000 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax tower : lax |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | landing other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| 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 | landing other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar pilot : instrument |
| Experience | controller radar : 16 flight time total : 1200 |
| ASRS Report | 410993 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Sct (southern california TRACON), on a regular basis allows heavy/B757 aircraft to pass other aircraft landing a parallel runway or the same complex at lax. The runways are separated by only 750 ft. In this case air carrier X (MD80) was landing on runway 24R and air carrier Y (B757) was landing runway 24L. Air carrier X had to slow to follow other traffic and when air carrier X was about 6 mi out, air carrier Y was 1/2 mi in-trail for the inboard runway but his ground speed was 90 KTS faster and air carrier Y eventually passed air carrier X on final. Air carrier X did not have air carrier Y in sight until he passed him and the pilot was startled. Additionally, there was no wake turbulence separation given to air carrier X. Sct lets these overtakes on final happen routinely and even though lax supervisors call sct about the problem, the practice continues. Callback conversation with reporter revealed the following information: reporter said the overtake problem occurs about once a week. Said he has occasionally given an arrival a go around when separation became a problem. Has submitted several ucr's outlining problems on spacing and runway use. Sounded frustrated that nothing is being done to improve the operation.
Original NASA ASRS Text
Title: ATCT CTLR AT LAX STATES THAT THE TRACON IS ALLOWING B757 ACFT TO PASS TFC ON THE PARALLEL RWY CAUSING A WAKE TURB EVENT.
Narrative: SCT (SOUTHERN CALIFORNIA TRACON), ON A REGULAR BASIS ALLOWS HVY/B757 ACFT TO PASS OTHER ACFT LNDG A PARALLEL RWY OR THE SAME COMPLEX AT LAX. THE RWYS ARE SEPARATED BY ONLY 750 FT. IN THIS CASE ACR X (MD80) WAS LNDG ON RWY 24R AND ACR Y (B757) WAS LNDG RWY 24L. ACR X HAD TO SLOW TO FOLLOW OTHER TFC AND WHEN ACR X WAS ABOUT 6 MI OUT, ACR Y WAS 1/2 MI IN-TRAIL FOR THE INBOARD RWY BUT HIS GND SPD WAS 90 KTS FASTER AND ACR Y EVENTUALLY PASSED ACR X ON FINAL. ACR X DID NOT HAVE ACR Y IN SIGHT UNTIL HE PASSED HIM AND THE PLT WAS STARTLED. ADDITIONALLY, THERE WAS NO WAKE TURB SEPARATION GIVEN TO ACR X. SCT LETS THESE OVERTAKES ON FINAL HAPPEN ROUTINELY AND EVEN THOUGH LAX SUPVRS CALL SCT ABOUT THE PROB, THE PRACTICE CONTINUES. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR SAID THE OVERTAKE PROB OCCURS ABOUT ONCE A WK. SAID HE HAS OCCASIONALLY GIVEN AN ARR A GAR WHEN SEPARATION BECAME A PROB. HAS SUBMITTED SEVERAL UCR'S OUTLINING PROBS ON SPACING AND RWY USE. SOUNDED FRUSTRATED THAT NOTHING IS BEING DONE TO IMPROVE THE OP.
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.