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After receiving an amendment to altitude clearance in descent aircraft descended below cleared altitude by approximately 400'.
| Attributes | |
| ACN | 111059 |
| Time | |
| Date | 198905 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : lax |
| State Reference | CA |
| Altitude | msl bound lower : 2600 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | approach : visual arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 10000 flight time type : 500 |
| ASRS Report | 111059 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : clearance other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course none taken : insufficient time |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Captain flying cleared to descend to 2500' and report airport in sight for visibility approach. At a fairly high rate of descent through approximately 3300' controller called traffic and gave 3000' descent limit. I did not hear the 3000' call and continue descent through 3000' for 2500'. First officer had set 3000', so altitude alert went off at 2750'. I immediately stopped descent and returned to 3000', bottom at 2600-2700'. Traffic was at 2000'. Controller was counting on us being in VMC at 3800', but bottoms were ragged and we were still IMC at 3000'. When we did not call airport in sight by 3500', approach control had to make a late altitude clearance.
Original NASA ASRS Text
Title: AFTER RECEIVING AN AMENDMENT TO ALT CLRNC IN DESCENT ACFT DESCENDED BELOW CLEARED ALT BY APPROX 400'.
Narrative: CAPT FLYING CLRED TO DSND TO 2500' AND RPT ARPT IN SIGHT FOR VIS APCH. AT A FAIRLY HIGH RATE OF DSCNT THROUGH APPROX 3300' CTLR CALLED TFC AND GAVE 3000' DSCNT LIMIT. I DID NOT HEAR THE 3000' CALL AND CONTINUE DSCNT THROUGH 3000' FOR 2500'. F/O HAD SET 3000', SO ALT ALERT WENT OFF AT 2750'. I IMMEDIATELY STOPPED DSCNT AND RETURNED TO 3000', BOTTOM AT 2600-2700'. TFC WAS AT 2000'. CTLR WAS COUNTING ON US BEING IN VMC AT 3800', BUT BOTTOMS WERE RAGGED AND WE WERE STILL IMC AT 3000'. WHEN WE DID NOT CALL ARPT IN SIGHT BY 3500', APCH CTL HAD TO MAKE A LATE ALT CLRNC.
Data retrieved from NASA's ASRS site as of August 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.