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A technician assigned to update the navigation data loaded in the FMS on 18 B737 aircraft inadvertently crossed off 2 aircraft as update completed.
| Attributes | |
| ACN | 724881 |
| Time | |
| Date | 200701 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-500 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 724881 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : fmc display other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : scheduled maintenance performance deficiency : logbook entry performance deficiency : installation |
| Supplementary | |
| Problem Areas | Environmental Factor Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
Line responded to a gate call on aircraft X. Flight crew reported that the navigation data on the FMC was out of date. Navigation data was installed and the aircraft was released for service. I was assigned to do navigation data and opc updates on 18 aircraft. Aircraft X was one of my assigned aircraft. I was working off an assignment sheet and after completing each aircraft; I crossed out that aircraft and proceeded to the next. Also on my assignment sheet was aircraft X. I believe that in my effort to complete all my assignments. I may have mistook aircraft X and aircraft Y; and I inadvertently crossed both of them out on my assignment sheet. And to the best of my knowledge; I signed off all task cards as being complete.
Original NASA ASRS Text
Title: A TECHNICIAN ASSIGNED TO UPDATE THE NAV DATA LOADED IN THE FMS ON 18 B737 ACFT INADVERTENTLY CROSSED OFF 2 ACFT AS UPDATE COMPLETED.
Narrative: LINE RESPONDED TO A GATE CALL ON ACFT X. FLT CREW RPTED THAT THE NAV DATA ON THE FMC WAS OUT OF DATE. NAV DATA WAS INSTALLED AND THE ACFT WAS RELEASED FOR SVC. I WAS ASSIGNED TO DO NAV DATA AND OPC UPDATES ON 18 ACFT. ACFT X WAS ONE OF MY ASSIGNED ACFT. I WAS WORKING OFF AN ASSIGNMENT SHEET AND AFTER COMPLETING EACH ACFT; I CROSSED OUT THAT ACFT AND PROCEEDED TO THE NEXT. ALSO ON MY ASSIGNMENT SHEET WAS ACFT X. I BELIEVE THAT IN MY EFFORT TO COMPLETE ALL MY ASSIGNMENTS. I MAY HAVE MISTOOK ACFT X AND ACFT Y; AND I INADVERTENTLY CROSSED BOTH OF THEM OUT ON MY ASSIGNMENT SHEET. AND TO THE BEST OF MY KNOWLEDGE; I SIGNED OFF ALL TASK CARDS AS BEING COMPLETE.
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.