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An EMB145 technician troubleshoots engine bleed system and finds high stage valve faulty. Replacement valve part number different than removed valve. Maintenance control incorrectly advises parts are interchangeable. Incorrect valve installed.
| Attributes | |
| ACN | 684895 |
| Time | |
| Date | 200512 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 684895 |
| Person 2 | |
| Function | oversight : coordinator |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | other other : 2 |
| Resolutory Action | none taken : detected after the fact |
| Factors | |
| Maintenance | contributing factor : non availability of parts contributing factor : schedule pressure performance deficiency : installation |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
Had low bleed temperature and anti-ice fail message. After troubleshooting we determined a faulty high stage valve was the problem. After removing the hsv we were concerned over a different part number for the removed valve and the installed one. We contacted base maintenance and maintenance control. After several hours of research; maintenance control assured us that the part number was interchangeable and that we would have it in writing when we returned home. Maintenance control also assured us he would take full responsibility if a problem existed. I was informed a few hours after I signed off job that the part was not interchangeable.
Original NASA ASRS Text
Title: AN EMB145 TECHNICIAN TROUBLESHOOTS ENG BLEED SYS AND FINDS HIGH STAGE VALVE FAULTY. REPLACEMENT VALVE PART NUMBER DIFFERENT THAN REMOVED VALVE. MAINT CTL INCORRECTLY ADVISES PARTS ARE INTERCHANGEABLE. INCORRECT VALVE INSTALLED.
Narrative: HAD LOW BLEED TEMP AND ANTI-ICE FAIL MESSAGE. AFTER TROUBLESHOOTING WE DETERMINED A FAULTY HIGH STAGE VALVE WAS THE PROB. AFTER REMOVING THE HSV WE WERE CONCERNED OVER A DIFFERENT PART NUMBER FOR THE REMOVED VALVE AND THE INSTALLED ONE. WE CONTACTED BASE MAINT AND MAINT CTL. AFTER SEVERAL HRS OF RESEARCH; MAINT CTL ASSURED US THAT THE PART NUMBER WAS INTERCHANGEABLE AND THAT WE WOULD HAVE IT IN WRITING WHEN WE RETURNED HOME. MAINT CTL ALSO ASSURED US HE WOULD TAKE FULL RESPONSIBILITY IF A PROB EXISTED. I WAS INFORMED A FEW HRS AFTER I SIGNED OFF JOB THAT THE PART WAS NOT INTERCHANGEABLE.
Data retrieved from NASA's ASRS site as of January 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.