B737-700
Maintenance Powerplant; Maintenance Airframe
Time Pressure; Distraction; Situational Awareness; Communication Breakdown
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Human Factors; Incorrect / Not Installed / Unavailable Part; Equipment / Tooling; Environment - Non Weather Related
I was assigned to replace a crew oxygen bottle on a live through flight. In the process; I lost the nut that secures the clamp that secures the crew oxygen bottle in place. So I went to our shop stock room to find a replacement nut. We did not have the exact nut; but I found one that fit; so I used it to secure the oxygen bottle in place. But this nut had a locking feature that made it harder to start on the clamp 'T' bar threads and then it got easy to tighten. Because of this; I may have over-tightened the clamp or damaged the threads on the 'T' bar. A contributing factor could be the pressure to avoid causing flight delays due to aircraft maintenance tasks. I am submitting this ASRS report and I contacted (Company) Maintenance Control (MOC) about this incident to make sure that the crew oxygen bottle is installed correctly and ensure the flight safety of this B737-700 aircraft and the passengers that fly on it. Evening shift. [Recommend] stocking the correct hardware for the crew oxygen bottle replacement and understanding from our Management team that sometimes flight delays caused by aircraft maintenance work are unavoidable. Aircraft later corrected.
A Line Aircraft Maintenance Technician (AMT) reports he may have over-tightened the clamp or damaged the threads on a 'T' bar strap that secures the crew oxygen bottle on a B737-700 aircraft. Lack of available correct replacement hardware and pressure to avoid maintenance delays were also noted by Technician.