B737-800
Maintenance Avionics; Maintenance Powerplant
Distraction; Other / Unknown
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors
Aircraft X in ZZZ reported possible low pressure of crew Oxygen. I have prepared a crew oxygen cylinder as a Fly Away Kit to load on rescue aircraft without following the Dangerous Goods shipping procedure. I have totally forgot that oxygen cylinder was a Dangerous Good. Aircraft departed [date/time] for ZZZ.
Air carrier Avionics Lead Technician reported he neglected to list Oxygen Cylinders as Hazmat shipment.