Narrative:

Aircraft X arrived with log 'elec light on'. Ipc 24-31-21-01J showed battery charger to be P/north 8-930-03. [Computerized catalogue] parts search returned [a maintenance bulletin part number]. Which we were out of stock at ZZZ. During [maintenance control] consultation it was discussed and agreed to use [a different bulletin part] because it was the same part but from [a different] parts pool which we had in stock at ZZZ and these two [bulletin] #s had been harmonized therefore I could install this without any additional paperwork. I installed the battery charger per amm 24-31-21-400-802-002. The subsequent operational check failed. I double checked the part numbers and discovered the original part off was P/north 8-930-03 and boeing spec # s282t003-3; and the part installed was P/north 4-254-02 and boeing spec # s282t002-6. I went back the work center to inform management that the part that was installed was not correct. Again during consultation with [maintenance control] it was determined that even though the parts had been 'harmonized' they were in fact; not the same and therefore could not be used on this aircraft. I created [a] log page to document the battery charger installed was the wrong part. The correct part was later installed by the next shift. However this morning on my return to work I have discovered that the above mentioned parts are still harmonized. This could lead to another tech installing the wrong part. After discussing this situation with other techs it is apparent this is not an isolated problem.harmonization of parts should be slowed down or stopped until mistakes like this do not happen. [Maintenance] needs the ability to change harmonized status once these mistakes are discovered. It is unacceptable that 24 hours later the status of these parts has not changed.

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Original NASA ASRS Text

Title: Maintenance Technician reported many part numbers are incorrect due to the 'harmonizing' of part numbers for a B737-900 Illustrated Parts Catalogue. An installed battery charger that was supposed to be compatible failed the test due to this problem.

Narrative: Aircraft X arrived with log 'elec light on'. IPC 24-31-21-01J showed battery charger to be P/N 8-930-03. [Computerized catalogue] parts search returned [a maintenance bulletin part number]. Which we were out of stock at ZZZ. During [Maintenance Control] consultation it was discussed and agreed to use [a different bulletin part] because it was the same part but from [a different] parts pool which we had in stock at ZZZ and these two [bulletin] #s had been harmonized therefore I could install this without any additional paperwork. I installed the battery charger per AMM 24-31-21-400-802-002. The subsequent operational check failed. I double checked the part numbers and discovered the original part off was P/N 8-930-03 and Boeing spec # S282T003-3; and the part installed was P/N 4-254-02 and Boeing spec # S282T002-6. I went back the work center to inform management that the part that was installed was not correct. Again during consultation with [Maintenance Control] it was determined that even though the parts had been 'Harmonized' they were in fact; not the same and therefore could not be used on this aircraft. I created [a] log page to document the battery charger installed was the wrong part. The correct part was later installed by the next shift. However this morning on my return to work I have discovered that the above mentioned parts are still harmonized. This could lead to another tech installing the wrong part. After discussing this situation with other techs it is apparent this is not an isolated problem.Harmonization of parts should be slowed down or stopped until mistakes like this do not happen. [Maintenance] needs the ability to change harmonized status once these mistakes are discovered. It is unacceptable that 24 hours later the status of these parts has not changed.

Data retrieved from NASA's ASRS site 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.