B777-300
Flight Attendant Current
Training / Qualification
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR
General Flight Cancelled / Delayed; General Maintenance Action
Procedure; Chart Or Publication; Aircraft
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.
Flight Attendant reported finding O2 bottles of different types swapped in their locations and are not interchangeable.