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A mechanic operating a computerized lathe machine raises concerns the computerized programs used by some lathe operators were not approved by their computer programmers. Landing gear parts for B777; B767; B757 and airbus A320 aircraft may not have been correctly milled.
| Attributes | |
| ACN | 838646 |
| Time | |
| Date | 200906 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | No Aircraft |
| Operating Under FAR Part | Part 121 |
| Component | |
| Aircraft Component | Landing Gear |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Repairman |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Deviation - Procedural Maintenance |
Narrative:
It has been brought to my attention; that the haas cnc (computerized numerical control) machine lathes; are not in compliance with our carrier operating procedures and component maintenance manual (cmm). These are cnc machines and are required per our operations procedures to have computer programmers maintain control of all production programs and is the responsibility of the programming group. This is far from the case. Most employees have taken it upon themselves to produce their own (computer) programs and use them in production of aircraft parts. Although some programs (still) do exist; and we have been told in the past to stop the practice; it is ongoing. To my knowledge; the programming department has never refused to make a program for this shop. With the supervisors not having any machining or machine shop experience; it is difficult for them understand the purpose; as well as the process.
Original NASA ASRS Text
Title: A Mechanic operating a computerized lathe machine raises concerns the computerized programs used by some lathe operators were not approved by their computer programmers. Landing gear parts for B777; B767; B757 and Airbus A320 aircraft may not have been correctly milled.
Narrative: It has been brought to my attention; that the HAAS CNC (Computerized Numerical Control) machine lathes; are not in compliance with our carrier operating procedures and component maintenance manual (CMM). These are CNC Machines and are required per our operations procedures to have computer programmers maintain control of all production programs and is the responsibility of the programming group. This is far from the case. Most employees have taken it upon themselves to produce their own (computer) programs and use them in production of aircraft parts. Although some programs (still) do exist; and we have been told in the past to stop the practice; it is ongoing. To my knowledge; the Programming Department has never refused to make a program for this shop. With the Supervisors not having any machining or machine shop experience; it is difficult for them understand the purpose; as well as the process.
Data retrieved from NASA's ASRS site as of April 2012 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.