 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Approach control directed runway change for A320 on civet arrival to lax results in loss of map display and consequent track deviation during reprogramming of FMS.
| Attributes | |
| ACN | 745723 |
| Time | |
| Date | 200707 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : lax.airport |
| State Reference | CA |
| Altitude | msl single value : 18000 |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| 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 : first officer |
| Experience | flight time last 90 days : 160 flight time total : 10500 flight time type : 3700 |
| ASRS Report | 745723 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 230 flight time total : 23200 flight time type : 2500 |
| ASRS Report | 745317 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : overcame equipment problem |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance Aircraft |
| Primary Problem | Ambiguous |
Narrative:
Descending thru FL180 and cleared to 'descend via' the civet arrival for landing on runway 25L. At this very busy time we were switched to runway 24R. I quickly changed the FMGC to runway 24R. This is one of those stars that require a specific runway 24R civet arrival and the FMGC not liking the runway 25L version; removed it from the flight plan. Now with the map gone and still trying to meet all crossing restrictions; the captain using backup navigation; made a slight turn to the left. Approach said they were showing us slightly south of course and we replied that we were correcting; while the captain made a turn to the right. During this time I was heads down reloading the FMGC. So now we have it in the box correctly. I proceeded to finish up the approach descent check expecting the captain to join course -- which he did not; flying now to the north of it. Approach then issued us a heading and subsequently direct skoll intersection. This was a runway change on a very busy STAR while passing FL180 with a twist. The twist being that one needs to enter the 'runway specific' STAR and not just the runway change or the FMGC drops it.
Original NASA ASRS Text
Title: APCH CONTROL DIRECTED RWY CHANGE FOR A320 ON CIVET ARRIVAL TO LAX RESULTS IN LOSS OF MAP DISPLAY AND CONSEQUENT TRACK DEVIATION DURING REPROGRAMMING OF FMS.
Narrative: DESCENDING THRU FL180 AND CLEARED TO 'DESCEND VIA' THE CIVET ARRIVAL FOR LANDING ON RWY 25L. AT THIS VERY BUSY TIME WE WERE SWITCHED TO RWY 24R. I QUICKLY CHANGED THE FMGC TO RWY 24R. THIS IS ONE OF THOSE STARS THAT REQUIRE A SPECIFIC RWY 24R CIVET ARRIVAL AND THE FMGC NOT LIKING THE RWY 25L VERSION; REMOVED IT FROM THE FLIGHT PLAN. NOW WITH THE MAP GONE AND STILL TRYING TO MEET ALL CROSSING RESTRICTIONS; THE CAPTAIN USING BACKUP NAVIGATION; MADE A SLIGHT TURN TO THE LEFT. APPROACH SAID THEY WERE SHOWING US SLIGHTLY SOUTH OF COURSE AND WE REPLIED THAT WE WERE CORRECTING; WHILE THE CAPTAIN MADE A TURN TO THE RIGHT. DURING THIS TIME I WAS HEADS DOWN RELOADING THE FMGC. SO NOW WE HAVE IT IN THE BOX CORRECTLY. I PROCEEDED TO FINISH UP THE APCH DESCENT CHECK EXPECTING THE CAPTAIN TO JOIN COURSE -- WHICH HE DID NOT; FLYING NOW TO THE NORTH OF IT. APPROACH THEN ISSUED US A HEADING AND SUBSEQUENTLY DIRECT SKOLL INTERSECTION. THIS WAS A RWY CHANGE ON A VERY BUSY STAR WHILE PASSING FL180 WITH A TWIST. THE TWIST BEING THAT ONE NEEDS TO ENTER THE 'RWY SPECIFIC' STAR AND NOT JUST THE RWY CHANGE OR THE FMGC DROPS IT.
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.