Contract mechanic appeared ill trained to service the crew oxygen on a B757-200.

Attributes
ACN	845413
Time
Date	200907
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Oxygen System/Crew
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 240 Flight Crew Total 17000 Flight Crew Type 6000
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Maintenance

Narrative:

Oxygen low for pilots. Reported 45 minutes prior to departure. I was told by maintenance control that it was a 10 minute job. The contract mechanic took almost an hour and a half to complete this job. I watched the pressure go as high as 1900 psi. I asked operations if they could check what was taking so long. They went and asked the mechanic. He told them the bottle was too hot. The pressure fluctuated up and down. I really do not believe this contract mechanic was qualified to work on our aircraft. I was concerned with the job he performed.

Original NASA ASRS Text

Title: Contract Mechanic appeared ill trained to service the crew oxygen on a B757-200.

Narrative: Oxygen low for pilots. Reported 45 minutes prior to departure. I was told by Maintenance Control that it was a 10 minute job. The Contract Mechanic took almost an hour and a half to complete this job. I watched the pressure go as high as 1900 psi. I asked Operations if they could check what was taking so long. They went and asked the Mechanic. He told them the bottle was too hot. The pressure fluctuated up and down. I really do not believe this Contract Mechanic was qualified to work on our aircraft. I was concerned with the job he performed.

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.