B757 Undifferentiated or Other Model
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 80; Flight Crew Total 21000; Flight Crew Type 1000
Distraction
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown
General None Reported / Taken
Human Factors
Received email concerning the crew oxygen cylinder on this flight. Prior to our flight there had been maintanace on the oxygen cylinder. It was relayed to me that the oxygen cylinder valve was not in the full open position during our flight. During my preflight 2 jumpseat riders came in and introduced themselves and I must have missed the long 10 count check during my pre-flight checks. I have gone back and reviewed the oxygen preflight procedures in the AOM to refresh myself. Plus; I know that if I get distracted I should start at a known completion point and continue with my tasks at hand.
B757 pilot reported missing an improperly positioned oxygen valve following a distraction during preflight.