 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
An aircraft maintenance technician (amt) was informed he may have incorrectly routed the capillary lines to a crew oxygen bottle on an emb-135 aircraft during a c-check; causing the oxygen bottle to drain without knowing.
| Attributes | |
| ACN | 1125110 |
| Time | |
| Date | 201309 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 135 ER/LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Oxygen System/Crew |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
It was brought to my attention that I may have routed the capillary lines incorrectly on an emb-135 aircraft's oxygen bottle during a c-check at ZZZ using work card (west/C) XXX-06 for completing an [oxygen] leak check. I was shown I [had] completed installation of the capillary lines in september 2013; by a manager in october 2013. I must have inadvertently connected the capillary lines incorrectly. I was told by manager that the emb-135 aircraft's oxygen bottle pressure gauge kept a good pressure reading; but because of the capillary lines being installed incorrectly the oxygen bottle level drained without knowing. [Recommend] clarifying proper installation of lines on work card (west/C) and have a better functional check to verify installation. The west/C picture of the oxygen line installation figure may need to be clarified to show the correct installation of all lines. Found while aircraft in service at gate.
Original NASA ASRS Text
Title: An Aircraft Maintenance Technician (AMT) was informed he may have incorrectly routed the capillary lines to a Crew Oxygen bottle on an EMB-135 aircraft during a C-Check; causing the oxygen bottle to drain without knowing.
Narrative: It was brought to my attention that I may have routed the capillary lines incorrectly on an EMB-135 aircraft's oxygen bottle during a C-Check at ZZZ using Work Card (W/C) XXX-06 for completing an [Oxygen] Leak Check. I was shown I [had] completed installation of the capillary lines in September 2013; by a Manager in October 2013. I must have inadvertently connected the capillary lines incorrectly. I was told by Manager that the EMB-135 aircraft's oxygen bottle pressure gauge kept a good pressure reading; but because of the capillary lines being installed incorrectly the Oxygen bottle level drained without knowing. [Recommend] clarifying proper installation of lines on Work Card (W/C) and have a better Functional Check to verify installation. The W/C picture of the oxygen line installation figure may need to be clarified to show the correct installation of all lines. Found while aircraft in service at gate.
Data retrieved from NASA's ASRS site as of July 2013 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.