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B767 landing sfo missed intercept to runway 28L and descended below assigned altitude during ATC runway change.
| Attributes | |
| ACN | 675066 |
| Time | |
| Date | 200510 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sfo.airport |
| State Reference | CA |
| Altitude | msl bound lower : 4700 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Controlling Facilities | tracon : nct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 28l |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : nct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 120 flight time total : 8500 flight time type : 7000 |
| ASRS Report | 675066 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Supplementary | |
| Problem Areas | FAA Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Ambiguous |
Narrative:
Captain flying on autoplt inbound on FMS bridge visual runway 28R at 6000 ft inside of archie. Norcal gave us a heading to now intercept localizer runway 28L and descend to 5000 ft. The captain clicked off the autoplt as I now worked the MCP and tried to find the new localizer frequency and load the box; time permitting. Although it was VFR; there was a cloud layer at 5000 ft; so a visual to the runway was not possible. We were kept high because ATC wanted to cross an aircraft below us from the west to runway 28R for some reason switching us to runway 28L. After finding and dialing in the runway 28L localizer frequency; I saw us descending at about 1200 FPM through 5100 ft and I called out 'altitude.' the hand flying captain leveled off; but not before touching just below 300 ft low of 5000 ft; at the same time overshooting slightly the runway 28L localizer course even though the MCP was set up to both intercept the localizer and the altitude. Corrections were made quickly and the controller never mentioned it; but air carrier Y was passing in front of us and just below us. I believe this problem wouldn't have occurred if the autoplt would have been used throughout; and it would have been helpful if the controller wouldn't have crossed the airplanes to opposite runways so late in the approach; inside of archie. It also would have helped if he had quickly given us the runway 28L frequency to expedite looking it up.
Original NASA ASRS Text
Title: B767 LNDG SFO MISSED INTERCEPT TO RWY 28L AND DSNDED BELOW ASSIGNED ALT DURING ATC RWY CHANGE.
Narrative: CAPT FLYING ON AUTOPLT INBOUND ON FMS BRIDGE VISUAL RWY 28R AT 6000 FT INSIDE OF ARCHIE. NORCAL GAVE US A HDG TO NOW INTERCEPT LOC RWY 28L AND DSND TO 5000 FT. THE CAPT CLICKED OFF THE AUTOPLT AS I NOW WORKED THE MCP AND TRIED TO FIND THE NEW LOC FREQ AND LOAD THE BOX; TIME PERMITTING. ALTHOUGH IT WAS VFR; THERE WAS A CLOUD LAYER AT 5000 FT; SO A VISUAL TO THE RWY WAS NOT POSSIBLE. WE WERE KEPT HIGH BECAUSE ATC WANTED TO CROSS AN ACFT BELOW US FROM THE W TO RWY 28R FOR SOME REASON SWITCHING US TO RWY 28L. AFTER FINDING AND DIALING IN THE RWY 28L LOC FREQ; I SAW US DSNDING AT ABOUT 1200 FPM THROUGH 5100 FT AND I CALLED OUT 'ALT.' THE HAND FLYING CAPT LEVELED OFF; BUT NOT BEFORE TOUCHING JUST BELOW 300 FT LOW OF 5000 FT; AT THE SAME TIME OVERSHOOTING SLIGHTLY THE RWY 28L LOC COURSE EVEN THOUGH THE MCP WAS SET UP TO BOTH INTERCEPT THE LOC AND THE ALT. CORRECTIONS WERE MADE QUICKLY AND THE CTLR NEVER MENTIONED IT; BUT ACR Y WAS PASSING IN FRONT OF US AND JUST BELOW US. I BELIEVE THIS PROB WOULDN'T HAVE OCCURRED IF THE AUTOPLT WOULD HAVE BEEN USED THROUGHOUT; AND IT WOULD HAVE BEEN HELPFUL IF THE CTLR WOULDN'T HAVE CROSSED THE AIRPLANES TO OPPOSITE RWYS SO LATE IN THE APCH; INSIDE OF ARCHIE. IT ALSO WOULD HAVE HELPED IF HE HAD QUICKLY GIVEN US THE RWY 28L FREQ TO EXPEDITE LOOKING IT UP.
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.