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A shop machinist reports temporary assembly of 2 compressor inner cases for drilling. Later found temporary repair in final assembly area.
| Attributes | |
| ACN | 556839 |
| Time | |
| Date | 200208 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| 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 | Commercial Fixed Wing |
| 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 | 556839 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure contributing factor : work cards performance deficiency : scheduled maintenance performance deficiency : repair performance deficiency : inspection performance deficiency : installation |
| Supplementary | |
| Problem Areas | Company Chart Or Publication Maintenance Human Performance Environmental Factor |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | SHOP JOB CARD |
Narrative:
On wed, assembled CASX271 to CASX234 with the understanding that assembly of parts was temporary for the purpose of back drilling welded holes in CASX234 attach flange. I have to note that this has been a common practice between shops. There was even a line on the shop order to subsequently remove 271. Later learned that assembly was fully riveted together. On fri, checked computer for part. Was in work final 244-6. The following mon, I was made aware that assembly was to be used in an engine pending an engineering approval. My concern is that steps in the process may have been skipped. It is my responsibility to see that parts belong together and parts are complete up to that point.
Original NASA ASRS Text
Title: A SHOP MACHINIST RPTS TEMPORARY ASSEMBLY OF 2 COMPRESSOR INNER CASES FOR DRILLING. LATER FOUND TEMPORARY REPAIR IN FINAL ASSEMBLY AREA.
Narrative: ON WED, ASSEMBLED CASX271 TO CASX234 WITH THE UNDERSTANDING THAT ASSEMBLY OF PARTS WAS TEMPORARY FOR THE PURPOSE OF BACK DRILLING WELDED HOLES IN CASX234 ATTACH FLANGE. I HAVE TO NOTE THAT THIS HAS BEEN A COMMON PRACTICE BTWN SHOPS. THERE WAS EVEN A LINE ON THE SHOP ORDER TO SUBSEQUENTLY REMOVE 271. LATER LEARNED THAT ASSEMBLY WAS FULLY RIVETED TOGETHER. ON FRI, CHKED COMPUTER FOR PART. WAS IN WORK FINAL 244-6. THE FOLLOWING MON, I WAS MADE AWARE THAT ASSEMBLY WAS TO BE USED IN AN ENG PENDING AN ENGINEERING APPROVAL. MY CONCERN IS THAT STEPS IN THE PROCESS MAY HAVE BEEN SKIPPED. IT IS MY RESPONSIBILITY TO SEE THAT PARTS BELONG TOGETHER AND PARTS ARE COMPLETE UP TO THAT POINT.
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.