Narrative:

Troubleshot deferred right pack fan inoperative. Found fan to be at fault. Removed failed fan; replacement fan had difference between airworthiness release part number and part number on data plate. Part number on data plate of serviceable fan = 31330-3G. Part number of airworthiness release tag = 31330-3. Stopped installation of new replacement part. Reinstalled original failed fan and planned on continued deferred item per MEL. Air carrier part configuration control in ZZZ approved installation of part #31330-3G with airworthiness release conflict. Maintenance inventory control reported that the additional 'G' is not part of the part number. Please refer to md-80 ipc 21-20-00-04N item 516E calls out optional part #31330-3G is available for part #31330-3. This indicates that part #31330-3G is a complete and valid part number. Removed failed fan again and installed part #31330-3G with approval from maintenance inventory control. Removed deferred item MEL on right pack fan. Suspect that the installed fan is not in full compliance with airworthiness release tag. Callback conversation with reporter revealed the following information: reporter stated the md-80 came in with a deferred pack problem. After determining the right pack fan had failed and noticing the replacement fan manufacturer part number was different; he decided to reinstall the old inoperative fan. But his carrier's maintenance inventory control gave him a verbal approval to install the -3G fan. Reporter stated he realized later; he should have had maintenance control also send him a document confirming and referencing the -3G replacement fan.

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Original NASA ASRS Text

Title: After troubleshooting and finding the right pack fan inoperative on an MD-80; a Mechanic notices the replacement fan part number on the Airworthiness Release 8130 tag; was different from the part number on the fan data plate.

Narrative: Troubleshot deferred right pack fan inoperative. Found fan to be at fault. Removed failed fan; replacement fan had difference between airworthiness release part number and part number on data plate. Part number on data plate of serviceable fan = 31330-3G. Part number of airworthiness release tag = 31330-3. Stopped installation of new replacement part. Reinstalled original failed fan and planned on continued deferred item per MEL. Air Carrier part configuration control in ZZZ approved installation of Part #31330-3G with airworthiness release conflict. Maintenance Inventory Control reported that the additional 'G' is not part of the part number. Please refer to MD-80 IPC 21-20-00-04N item 516E calls out Optional Part #31330-3G is available for Part #31330-3. This indicates that Part #31330-3G is a complete and valid part number. Removed failed fan again and installed Part #31330-3G with approval from Maintenance Inventory Control. Removed deferred item MEL on right pack fan. Suspect that the installed fan is not in full compliance with airworthiness release tag. Callback conversation with Reporter revealed the following information: Reporter stated the MD-80 came in with a deferred pack problem. After determining the right pack fan had failed and noticing the replacement fan manufacturer part number was different; he decided to reinstall the old inoperative fan. But his carrier's Maintenance Inventory Control gave him a verbal approval to install the -3G fan. Reporter stated he realized later; he should have had Maintenance Control also send him a document confirming and referencing the -3G replacement fan.

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.