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A320 captain reports being informed after the fact that the FMC stored aircraft bow was 10000 pounds in error when used for performance calculations for his flight.
| Attributes | |
| ACN | 779965 |
| Time | |
| Date | 200803 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : lax.airport |
| State Reference | CA |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain observation : company check pilot |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial pilot : atp pilot : private |
| Experience | flight time last 90 days : 225 flight time total : 15000 flight time type : 1000 |
| ASRS Report | 779965 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain |
| Events | |
| Anomaly | maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far non adherence : company policies |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Company Flight Crew Human Performance |
| Primary Problem | Ambiguous |
Narrative:
We flew an uneventful segment; arrived in lax and handed the aircraft over to the outbound crew. I was still in the terminal; awaiting another flight when I received a call from the outbound flight's captain. His review of the performance data revealed that the current aircraft operating weight was approximately 10000 pounds below the actual operating weight of the aircraft. The outbound captain entered a write-up in the maintenance log and the error was corrected by line maintenance. This situation was caused by an improper loading of weight and balance data on board the aircraft that I did not discover prior to flight. To prevent recurrence of this situation; line maintenance should check the data loads of the weight and balance information on each recurring inspection (daily/weekly checks).
Original NASA ASRS Text
Title: A320 CAPT REPORTS BEING INFORMED AFTER THE FACT THAT THE FMC STORED ACFT BOW WAS 10000 POUNDS IN ERROR WHEN USED FOR PERFORMANCE CALCULATIONS FOR HIS FLIGHT.
Narrative: WE FLEW AN UNEVENTFUL SEGMENT; ARRIVED IN LAX AND HANDED THE ACFT OVER TO THE OUTBOUND CREW. I WAS STILL IN THE TERMINAL; AWAITING ANOTHER FLT WHEN I RECEIVED A CALL FROM THE OUTBOUND FLT'S CAPT. HIS REVIEW OF THE PERFORMANCE DATA REVEALED THAT THE CURRENT ACFT OPERATING WT WAS APPROX 10000 LBS BELOW THE ACTUAL OPERATING WT OF THE ACFT. THE OUTBOUND CAPT ENTERED A WRITE-UP IN THE MAINT LOG AND THE ERROR WAS CORRECTED BY LINE MAINT. THIS SITUATION WAS CAUSED BY AN IMPROPER LOADING OF WT AND BAL DATA ON BOARD THE ACFT THAT I DID NOT DISCOVER PRIOR TO FLT. TO PREVENT RECURRENCE OF THIS SITUATION; LINE MAINT SHOULD CHK THE DATA LOADS OF THE WT AND BAL INFO ON EACH RECURRING INSPECTION (DAILY/WKLY CHKS).
Data retrieved from NASA's ASRS site as of May 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.