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Flight crew of a B757 stopped descent and turned away to the left in response to visual sighting of an MD11 overshooting parallel runway. TCASII RA issued a descent command which would have worsened the situation.
| Attributes | |
| ACN | 354305 |
| Time | |
| Date | 199612 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : lax |
| State Reference | CA |
| 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 descent other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 354305 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | horizontal : 4000 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
ATC asked if we had an MD11 base leg runway 24R in sight. We said we had traffic in sight base leg. At 2 mi outside OM, received RA which told us to descend for traffic. I noticed MD11 overshooting runway 24R and lining up on runway 25L. I immediately stopped descent and climbed left, away from traffic. At same time, MD11 turned back to runway 24R. When conflict was gone, I turned and landed on runway 25L. If we had followed RA to descend, it would have descended us into MD11.
Original NASA ASRS Text
Title: FLC OF A B757 STOPPED DSCNT AND TURNED AWAY TO THE L IN RESPONSE TO VISUAL SIGHTING OF AN MD11 OVERSHOOTING PARALLEL RWY. TCASII RA ISSUED A DSCNT COMMAND WHICH WOULD HAVE WORSENED THE SIT.
Narrative: ATC ASKED IF WE HAD AN MD11 BASE LEG RWY 24R IN SIGHT. WE SAID WE HAD TFC IN SIGHT BASE LEG. AT 2 MI OUTSIDE OM, RECEIVED RA WHICH TOLD US TO DSND FOR TFC. I NOTICED MD11 OVERSHOOTING RWY 24R AND LINING UP ON RWY 25L. I IMMEDIATELY STOPPED DSCNT AND CLBED L, AWAY FROM TFC. AT SAME TIME, MD11 TURNED BACK TO RWY 24R. WHEN CONFLICT WAS GONE, I TURNED AND LANDED ON RWY 25L. IF WE HAD FOLLOWED RA TO DSND, IT WOULD HAVE DSNDED US INTO MD11.
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.