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Flight attendant reported finding O2 bottles of different types swapped in their locations and are not interchangeable.
| Attributes | |
| ACN | 1748033 |
| Time | |
| Date | 202006 |
| Place | |
| Locale Reference | ZZZZ.Airport |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B777-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Oxygen System/Portable |
| Person 1 | |
| Function | Flight Attendant (On Duty) |
| Qualification | Flight Attendant Current |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Procedural FAR |
Narrative:
Discovered incorrect O2 walk-around bottles in ofar fwd south/south and ofcr south/south aisle-side location. Found (1) 66N bottle positioned in ofar (incorrect) and (1) 4.25 single-hi flow bottle (incorrect) in ofcr south/south aisle-side location. After discussion with purser (and confirming aircraft compartment placards); each bottle was swapped to position correctly. Aircraft operated unknown number of revenue cycles with incorrect provisioning (thus violation of far 121.329) regarding supplemental O2 requirements. It is highly unlikely that a flight attendant swapped the location of each bottle. Therefore; it is reasonable to assume this error was caused by line maintenance/tech-ops. This is a repeat write-up regarding incorrect identification and placement of 66N O2 bottles. As previously reported; line maintenance/tech-op has documentation/understanding these cyl bottle are 'interchangeable'. Line maintenance is confusing with former airline dual flow (hi/lo) 4.25 liter bottles. 66N bottle are *only* fitted with dual lo flow outlets. See previous as soon as possible/cers reports for additional details/suggestions.
Original NASA ASRS Text
Title: Flight Attendant reported finding O2 bottles of different types swapped in their locations and are not interchangeable.
Narrative: Discovered incorrect O2 walk-around bottles in OFAR Fwd S/S and OFCR S/S Aisle-side location. Found (1) 66N bottle positioned in OFAR (incorrect) and (1) 4.25 Single-Hi Flow bottle (incorrect) in OFCR S/S Aisle-side location. After discussion with Purser (and confirming aircraft compartment placards); each bottle was swapped to position correctly. Aircraft operated unknown number of revenue cycles with incorrect provisioning (thus violation of FAR 121.329) regarding supplemental O2 requirements. It is highly unlikely that a FA swapped the location of each bottle. Therefore; it is reasonable to assume this error was caused by Line Maintenance/Tech-Ops. This is a repeat write-up regarding incorrect identification and placement of 66N O2 bottles. As previously reported; Line Maintenance/Tech-op has documentation/understanding these cyl bottle are 'interchangeable'. Line Maintenance is confusing with former airline dual flow (Hi/Lo) 4.25 liter bottles. 66N bottle are *only* fitted with dual Lo flow outlets. See previous ASAP/CERS reports for additional details/suggestions.
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.