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A B737-300 had the #1 IRU replaced. The borrowed part did not have the same part number as removed unit. Technician referenced ipc which showed part as interchangeable.
| Attributes | |
| ACN | 683752 |
| Time | |
| Date | 200512 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 31 |
| ASRS Report | 683752 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Resolutory Action | none taken : detected after the fact |
| Factors | |
| Maintenance | contributing factor : schedule pressure contributing factor : non availability of parts contributing factor : manuals performance deficiency : logbook entry performance deficiency : installation |
| Supplementary | |
| Problem Areas | Chart Or Publication Aircraft Maintenance Human Performance |
| Primary Problem | Chart Or Publication |
Narrative:
Aircraft arrived with #1 IRU fault light. I troubleshot to #1 IRU. Parts department borrowed part from another operator local. Upon receiving part; I found part number was not the same. I researched in the ipc and I determined the part was interchangeable with this series aircraft. I called maintenance control and they agreed with my findings. Parts department then called back and questioned the part. I conferenced in with maintenance control and again we determined it was interchangeable. I then downgraded aircraft due to borrowed part and dispatched aircraft. There was no corrective action; as I did not feel there was a problem. Then the company informed me there might be a problem. I am trained to use the ipc as the determining factor and thought that was what I did. Contributing factors: aircraft design/confign; aircraft confign variability; parts unavailable.
Original NASA ASRS Text
Title: A B737-300 HAD THE #1 IRU REPLACED. THE BORROWED PART DID NOT HAVE THE SAME PART NUMBER AS REMOVED UNIT. TECHNICIAN REFED IPC WHICH SHOWED PART AS INTERCHANGEABLE.
Narrative: ACFT ARRIVED WITH #1 IRU FAULT LIGHT. I TROUBLESHOT TO #1 IRU. PARTS DEPT BORROWED PART FROM ANOTHER OPERATOR LCL. UPON RECEIVING PART; I FOUND PART NUMBER WAS NOT THE SAME. I RESEARCHED IN THE IPC AND I DETERMINED THE PART WAS INTERCHANGEABLE WITH THIS SERIES ACFT. I CALLED MAINT CTL AND THEY AGREED WITH MY FINDINGS. PARTS DEPT THEN CALLED BACK AND QUESTIONED THE PART. I CONFERENCED IN WITH MAINT CTL AND AGAIN WE DETERMINED IT WAS INTERCHANGEABLE. I THEN DOWNGRADED ACFT DUE TO BORROWED PART AND DISPATCHED ACFT. THERE WAS NO CORRECTIVE ACTION; AS I DID NOT FEEL THERE WAS A PROB. THEN THE COMPANY INFORMED ME THERE MIGHT BE A PROB. I AM TRAINED TO USE THE IPC AS THE DETERMINING FACTOR AND THOUGHT THAT WAS WHAT I DID. CONTRIBUTING FACTORS: ACFT DESIGN/CONFIGN; ACFT CONFIGN VARIABILITY; PARTS UNAVAILABLE.
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.