Narrative:

While checking an interior lavatory write-up on an inbound flight; I was approached by flight attendant who showed me an aviox oxygen (O2) unit at 2H that had the emergency use decal missing. Not knowing if unit had been used I removed unit and ordered a new [aviox] unit. Upon arrival the unit had to be unboxed and assembled completely.after reading the maintenance manual (MM) 35-30-99 I assembled the unit and reinstalled it in the aircraft. This was the first time I have had contact with one of these units. I made an entry into our non-routine maintenance computer and signed it off. The plane left the gate and I was taking care of the old aviox unit and was examining it; and realized that I had not reset the actuator pin correctly. I did not want any issues further down the line so I immediately contacted my lead and we contacted maintenance control representative; mr. 'X'; who was very helpful and we were able to straighten it out over the phone with ZZZ maintenance as to exact location top or bottom unit in the doghouse [compartment].

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Original NASA ASRS Text

Title: A Line Mechanic reports he had to unbox and completely assemble an Aviox Passenger Oxygen unit as a replacement for a B777-200 cabin Aviox bottle that a Flight Attendant found with the Emergency Use decal missing. After departure; Mechanic realized he had not reset the bottle actuator pin correctly.

Narrative: While checking an interior lavatory write-up on an inbound flight; I was approached by Flight Attendant who showed me an Aviox Oxygen (O2) unit at 2H that had the Emergency Use decal missing. Not knowing if unit had been used I removed unit and ordered a new [Aviox] unit. Upon arrival the unit had to be unboxed and assembled completely.After reading the Maintenance Manual (MM) 35-30-99 I assembled the unit and reinstalled it in the aircraft. This was the first time I have had contact with one of these units. I made an entry into our Non-routine Maintenance computer and signed it off. The plane left the gate and I was taking care of the old Aviox unit and was examining it; and realized that I had not reset the actuator pin correctly. I did not want any issues further down the line so I immediately contacted my Lead and we contacted Maintenance Control Representative; Mr. 'X'; who was very helpful and we were able to straighten it out over the phone with ZZZ Maintenance as to exact location top or bottom unit in the Doghouse [compartment].

Data retrieved from NASA's ASRS site as of April 2012 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.