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B757-200 engine high pressure compressor shafts were damaged during a repair process in an engine overhaul shop and may have been put into service.
| Attributes | |
| ACN | 476240 |
| Time | |
| Date | 200006 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 476240 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 476345 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure |
| Independent Detector | other other : 969 |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : work cards contributing factor : tooling performance deficiency : inspection performance deficiency : repair |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Company |
| Primary Problem | Company |
Narrative:
During an investigation into some high pressure compressor rear shafts that were damaged during a repair process, it was revealed to me that there is a possibility that engines were produced from ZZZ engine shop with this condition: forward face of stage 4 disc web diaphragm 13 impacted by blast media.
Original NASA ASRS Text
Title: B757-200 ENG HIGH PRESSURE COMPRESSOR SHAFTS WERE DAMAGED DURING A REPAIR PROCESS IN AN ENG OVERHAUL SHOP AND MAY HAVE BEEN PUT INTO SVC.
Narrative: DURING AN INVESTIGATION INTO SOME HIGH PRESSURE COMPRESSOR REAR SHAFTS THAT WERE DAMAGED DURING A REPAIR PROCESS, IT WAS REVEALED TO ME THAT THERE IS A POSSIBILITY THAT ENGS WERE PRODUCED FROM ZZZ ENG SHOP WITH THIS CONDITION: FORWARD FACE OF STAGE 4 DISC WEB DIAPHRAGM 13 IMPACTED BY BLAST MEDIA.
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.