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B757-200 flight crew experiences loss of FMS functionality on attempt to reprogram late runway change on civet STAR to lax.
| Attributes | |
| ACN | 757710 |
| Time | |
| Date | 200710 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : lax.airport |
| State Reference | CA |
| Altitude | msl single value : 20000 |
| Environment | |
| Light | Daylight |
| 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 : vacating altitude |
| Route In Use | arrival star : civet |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 757710 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 757894 |
| Events | |
| Anomaly | aircraft equipment problem : critical other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft ATC Human Performance |
| Primary Problem | Ambiguous |
Narrative:
In profile descent on civet arrival to lax; runway 25L; in vicinity of civet; socal revised clearance to runway 24R. That had been loaded into route 2 in FMS. Began to make change in route; given speed increase of 60 KTS; already in the descent. In making the changes; FMS froze; so we asked for vectors to the final approach course. I normally just ask for a vector on a runway change at this point; but we elected to try to keep on the new arrival. Won't do it again...too much heads down and opportunity for error. Better choice; get a heading and altitude; set up approach; and fly it. Called socal sector supervisor; had no loss of separation; and he apologized for late change. He also agreed that better course of action would be vectors to final.
Original NASA ASRS Text
Title: B757-200 FLT CREW EXPERIENCES LOSS OF FMS FUNCTIONALITY ON ATTEMPT TO REPROGRAM LATE RWY CHANGE ON CIVET STAR TO LAX.
Narrative: IN PROFILE DSCNT ON CIVET ARR TO LAX; RWY 25L; IN VICINITY OF CIVET; SOCAL REVISED CLRNC TO RWY 24R. THAT HAD BEEN LOADED INTO RTE 2 IN FMS. BEGAN TO MAKE CHANGE IN RTE; GIVEN SPD INCREASE OF 60 KTS; ALREADY IN THE DSCNT. IN MAKING THE CHANGES; FMS FROZE; SO WE ASKED FOR VECTORS TO THE FINAL APCH COURSE. I NORMALLY JUST ASK FOR A VECTOR ON A RWY CHANGE AT THIS POINT; BUT WE ELECTED TO TRY TO KEEP ON THE NEW ARR. WON'T DO IT AGAIN...TOO MUCH HEADS DOWN AND OPPORTUNITY FOR ERROR. BETTER CHOICE; GET A HDG AND ALT; SET UP APCH; AND FLY IT. CALLED SOCAL SECTOR SUPVR; HAD NO LOSS OF SEPARATION; AND HE APOLOGIZED FOR LATE CHANGE. HE ALSO AGREED THAT BETTER COURSE OF ACTION WOULD BE VECTORS TO FINAL.
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.