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Air carrier flight crew initiate TCASII RA climb when an MD11 on its right side, paralleling its route, turns into conflict with it.
| Attributes | |
| ACN | 427331 |
| Time | |
| Date | 199902 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : oak airport : sfo |
| State Reference | CA |
| Altitude | msl bound lower : 4000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | approach : visual arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-11 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | approach : visual arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 150 flight time total : 15000 flight time type : 3300 |
| ASRS Report | 427331 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 1000 |
| Supplementary | |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft (X) on the tiptoe visual to runway 28L at sfo, observed an MD11 (Y) off our right, same altitude, same direction. We were within a mi or two of menlo intersection. We observed the MD11 turn toward us and at the same time, received a TCASII RA to climb. Climbed 1000 ft as the MD11 passed under us.
Original NASA ASRS Text
Title: ACR FLC INITIATE TCASII RA CLB WHEN AN MD11 ON ITS R SIDE, PARALLELING ITS RTE, TURNS INTO CONFLICT WITH IT.
Narrative: ACFT (X) ON THE TIPTOE VISUAL TO RWY 28L AT SFO, OBSERVED AN MD11 (Y) OFF OUR R, SAME ALT, SAME DIRECTION. WE WERE WITHIN A MI OR TWO OF MENLO INTXN. WE OBSERVED THE MD11 TURN TOWARD US AND AT THE SAME TIME, RECEIVED A TCASII RA TO CLB. CLBED 1000 FT AS THE MD11 PASSED UNDER US.
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.