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A B757-200 engine had the radial drive shaft replaced incorrectly as job was accomplished without incorporation of service bulletin requiring balancing.
| Attributes | |
| ACN | 491451 |
| Time | |
| Date | 200011 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 491451 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure |
| Independent Detector | other other : person 3 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : work cards contributing factor : schedule pressure contributing factor : engineering procedure performance deficiency : inspection performance deficiency : installation |
| Supplementary | |
| Problem Areas | Chart Or Publication Maintenance Human Performance Aircraft |
| Primary Problem | Chart Or Publication |
Narrative:
While performing radial drive reseal found lower shaft coupling damaged. Obtained replacement shaft and installed per manual, but failed to note incorporation of service bulletin which does not allow for single shaft replacement due to balancing and serialization.
Original NASA ASRS Text
Title: A B757-200 ENG HAD THE RADIAL DRIVE SHAFT REPLACED INCORRECTLY AS JOB WAS ACCOMPLISHED WITHOUT INCORPORATION OF SVC BULLETIN REQUIRING BALANCING.
Narrative: WHILE PERFORMING RADIAL DRIVE RESEAL FOUND LOWER SHAFT COUPLING DAMAGED. OBTAINED REPLACEMENT SHAFT AND INSTALLED PER MANUAL, BUT FAILED TO NOTE INCORPORATION OF SVC BULLETIN WHICH DOES NOT ALLOW FOR SINGLE SHAFT REPLACEMENT DUE TO BALANCING AND SERIALIZATION.
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.