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A lead mechanic was informed by his supervisor that a B737-800 crew oxygen bottle was found closed at an outstation. Lead had signed off the write-up; after two maintenance techs had replaced bottle.
| Attributes | |
| ACN | 778312 |
| Time | |
| Date | 200801 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 7 |
| ASRS Report | 778312 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : briefing performance deficiency : non compliance with legal requirements performance deficiency : training performance deficiency : installation performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
I was the upgrade lead technician. I assigned 2 technicians to service crew oxygen. The bottle pressure reading was below dispatch limits. I signed off the non-routine; indicating that the crew oxygen was svced after the job was completed by the technicians. Later; was informed by my supervisor that the aircraft departed ZZZ and the crew oxygen bottle was found closed at an outstation. Callback conversation with reporter revealed the following information: reporter stated he does not believe the crew oxygen bottle was the composite type. But; also knows that his carrier is transitioning from steel to composite.
Original NASA ASRS Text
Title: A LEAD MECHANIC WAS INFORMED BY HIS SUPERVISOR THAT A B737-800 CREW OXYGEN BOTTLE WAS FOUND CLOSED AT AN OUTSTATION. LEAD HAD SIGNED OFF THE WRITE-UP; AFTER TWO MAINT TECHS HAD REPLACED BOTTLE.
Narrative: I WAS THE UPGRADE LEAD TECHNICIAN. I ASSIGNED 2 TECHNICIANS TO SVC CREW OXYGEN. THE BOTTLE PRESSURE READING WAS BELOW DISPATCH LIMITS. I SIGNED OFF THE NON-ROUTINE; INDICATING THAT THE CREW OXYGEN WAS SVCED AFTER THE JOB WAS COMPLETED BY THE TECHNICIANS. LATER; WAS INFORMED BY MY SUPVR THAT THE ACFT DEPARTED ZZZ AND THE CREW OXYGEN BOTTLE WAS FOUND CLOSED AT AN OUTSTATION. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED HE DOES NOT BELIEVE THE CREW OXYGEN BOTTLE WAS THE COMPOSITE TYPE. BUT; ALSO KNOWS THAT HIS CARRIER IS TRANSITIONING FROM STEEL TO COMPOSITE.
Data retrieved from NASA's ASRS site as of May 2009 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.