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Flight crew of an widebody transport started descent prematurely after intercepting the GS on a visual approach resulting in an altitude excursion from assigned.
| Attributes | |
| ACN | 298695 |
| Time | |
| Date | 199503 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sfo |
| State Reference | CA |
| Altitude | msl bound lower : 2400 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| Operator | common carrier : air carrier |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 130 flight time total : 10000 |
| ASRS Report | 298695 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer pilot : cfi |
| Experience | flight time last 90 days : 100 flight time total : 14500 flight time type : 1250 |
| ASRS Report | 298590 |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
About 15 DME, approach asked if we had runway in sight? Captain confirmed runway in sight. We were cleared for visual to runway 19L maintain 3000 ft until 8 DME. I selected approach and land to follow the localizer inbound. At the same time approach called traffic at 1 O'clock and 11 O'clock landing on runway 19R and runway 19L ahead of us. FMS captured localizer and GS. At 9 DME we realized our altitude excursion at which time it was too late to correct and proceeded to ILS runway 19L for normal landing. Altitude excursion was caused by intense approach traffic and clouds on final approach.
Original NASA ASRS Text
Title: FLC OF AN WDB STARTED DSCNT PREMATURELY AFTER INTERCEPTING THE GS ON A VISUAL APCH RESULTING IN AN ALT EXCURSION FROM ASSIGNED.
Narrative: ABOUT 15 DME, APCH ASKED IF WE HAD RWY IN SIGHT? CAPT CONFIRMED RWY IN SIGHT. WE WERE CLRED FOR VISUAL TO RWY 19L MAINTAIN 3000 FT UNTIL 8 DME. I SELECTED APCH AND LAND TO FOLLOW THE LOC INBOUND. AT THE SAME TIME APCH CALLED TFC AT 1 O'CLOCK AND 11 O'CLOCK LNDG ON RWY 19R AND RWY 19L AHEAD OF US. FMS CAPTURED LOC AND GS. AT 9 DME WE REALIZED OUR ALT EXCURSION AT WHICH TIME IT WAS TOO LATE TO CORRECT AND PROCEEDED TO ILS RWY 19L FOR NORMAL LNDG. ALT EXCURSION WAS CAUSED BY INTENSE APCH TFC AND CLOUDS ON FINAL APCH.
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.