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While removing a fuel boost pump for B767-300ER aircraft; mechanic inadvertently loosened the wrong bolt causing a fuel spill.
| Attributes | |
| ACN | 759989 |
| Time | |
| Date | 200710 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 759989 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other other : 1 |
| Resolutory Action | other |
| Consequence | other |
| Factors | |
| Maintenance | performance deficiency : training performance deficiency : non compliance with legal requirements performance deficiency : installation |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
While reviewing the maintenance manual procedures for the right&right of the fuel boost pump; I realized I may have inadvertently loosened the wrong bolt; instead of the 3 bolts that are required to right&right the boost pump. By removing this bolt it allowed the shutoff sleeve assembly to come off and produced the fuel spill.
Original NASA ASRS Text
Title: WHILE REMOVING A FUEL BOOST PUMP FOR B767-300ER ACFT; MECHANIC INADVERTENTLY LOOSENED THE WRONG BOLT CAUSING A FUEL SPILL.
Narrative: WHILE REVIEWING THE MAINT MANUAL PROCS FOR THE R&R OF THE FUEL BOOST PUMP; I REALIZED I MAY HAVE INADVERTENTLY LOOSENED THE WRONG BOLT; INSTEAD OF THE 3 BOLTS THAT ARE REQUIRED TO R&R THE BOOST PUMP. BY REMOVING THIS BOLT IT ALLOWED THE SHUTOFF SLEEVE ASSEMBLY TO COME OFF AND PRODUCED THE FUEL SPILL.
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.