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B757 flight crew reports FMC lock up after attempted runway change during the civet 5 into lax. Flight crew requests vector to the new runway and lands uneventfully.
| Attributes | |
| ACN | 743843 |
| Time | |
| Date | 200706 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lax.airport |
| State Reference | CA |
| Altitude | msl single value : 13000 |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : civet |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 743843 |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Supplementary | |
| Problem Areas | ATC Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
Filed civet runway 25L -- approximately 10 NM from civet; ATC changed us to civet runway 24R. FMC locked up and started re-syncing with other FMC when change was attempted. Informed approach we had navigation computer failure and requested heading and altitude. Heading issued to intercept localizer runway 24R. Landing uneventful.
Original NASA ASRS Text
Title: B757 FLT CREW REPORTS FMC LOCK UP AFTER ATTEMPTED RWY CHANGE DURING THE CIVET 5 INTO LAX. FLT CREW REQUESTS VECTOR TO THE NEW RWY AND LANDS UNEVENTFULLY.
Narrative: FILED CIVET RWY 25L -- APPROX 10 NM FROM CIVET; ATC CHANGED US TO CIVET RWY 24R. FMC LOCKED UP AND STARTED RE-SYNCING WITH OTHER FMC WHEN CHANGE WAS ATTEMPTED. INFORMED APCH WE HAD NAVIGATION COMPUTER FAILURE AND REQUESTED HDG AND ALT. HDG ISSUED TO INTERCEPT LOCALIZER RWY 24R. LANDING UNEVENTFUL.
Data retrieved from NASA's ASRS site as of January 2009 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.