Narrative:

Recently I went to ZZZ and met with several tooling supervisors from around the system to discuss the issues they were having with company's oxygen (O2) service carts. I found that ZZZ had modified the O2 service cart with no engineering support or oem drawings or documentation. They did not update any information in the company's tool tracking system; with these modifications. They changed/added lines; gauges; check valves; and shutoff valves without being oxygen cleaned. I am not sure if the gauges were checked for accuracy. I inducted this new O2 service cart into the company's system based on the drawings and certificates that the oem provided to us. This cart looked nothing like what was initially sent to ZZZ. My name and employee number is still [on] the last sign off on the now modified cart. I was disturbed about the fact that the supervisor and his technicians had no sense that their modifications were illegal and needed proper documentation.there seems to be a casualness about the proper handling of tooling/test equipment. There is a lack of understanding of the importance of proper procedures; and accuracy. Also; just like performing work on aircraft; any work on tooling should be recorded. Untrained personnel should not be modifying testers. Oxygen has the added danger of contamination which can cause explosive and deadly results. This mentality starts at the top; our supervisors of our local tool rooms; and goes down to the floor. I think a yearly cbt (computer based training) on tooling/test equipment and our SOP would show the importance of our test equipment and the impact it can have on our aircraft and people's lives. This attitude towards test equipment affects the safety/reliability for our fellow co-workers and our customers.

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Original NASA ASRS Text

Title: Maintenance Technician reported that station technicians modified company oxygen service carts without documentation and used unauthorized and uncleaned components for modification.

Narrative: Recently I went to ZZZ and met with several Tooling Supervisors from around the system to discuss the issues they were having with Company's Oxygen (O2) Service Carts. I found that ZZZ had modified the O2 Service Cart with no engineering support or OEM drawings or documentation. They did not update any information in the company's Tool Tracking System; with these modifications. They changed/added lines; gauges; check valves; and shutoff valves without being oxygen cleaned. I am not sure if the gauges were checked for accuracy. I inducted this new O2 Service Cart into the Company's system based on the drawings and certificates that the OEM provided to us. This cart looked nothing like what was initially sent to ZZZ. My name and employee number is still [on] the last sign off on the NOW modified cart. I was disturbed about the fact that the Supervisor and his technicians had no sense that their modifications were illegal and needed proper documentation.There seems to be a casualness about the proper handling of Tooling/Test Equipment. There is a lack of understanding of the importance of proper procedures; and accuracy. Also; just like performing work on aircraft; any work on tooling should be recorded. Untrained personnel should not be modifying testers. Oxygen has the added danger of contamination which can cause explosive and deadly results. This mentality starts at the top; our Supervisors of our local Tool Rooms; and goes down to the floor. I think a yearly CBT (Computer Based Training) on Tooling/Test Equipment and our SOP would show the importance of our test equipment and the impact it can have on our aircraft and people's lives. This attitude towards test equipment affects the safety/reliability for our fellow co-workers and our customers.

Data retrieved from NASA's ASRS site 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.