A DC9-30 WAS DISPATCHED IN NON COMPLIANCE WITH THE INCORRECT L AND R PACK HEAT EXCHANGERS INSTALLED CAUSED BY IMPROPER PARTS DOCUMENTATION.

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ON OCT/XA/99 THE HEAT EXCHANGER ASSEMBLIES WERE CHANGED ON ACFT XYZ AND THE WRONG HEAT EXCHANGERS WERE INSTALLED. THE FOLLOWING IS A SUMMARY OF THE THINGS WE FEEL THAT LED TO THE INSTALLATION OF THE WRONG HEAT EXCHANGER ASSEMBLIES. THE MANUFACTURER'S PART NUMBER THAT CORRESPONDS WITH THE ASSEMBLY NUMBER IS NOT IN THE ILLUSTRATED PARTS CATALOG. THE ONLY REF TO THE PART NUMBER IS ON THE ACR JOB CARD #WX-XXX; WHICH WAS NOT ISSUED TO THE ACFT. ALSO; THE MSSD SCREEN SHOWS CONFLICTING INFO FOR THE ACR EFFECTIVITY FOR THE HEAT EXCHANGERS ASSEMBLIES. THE EVENT HAS BEEN SELF-DISCLOSED BY ACR QUALITY ASSURANCE AND THEY ARE CORRECTING THE PROB. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ONLY DOCUMENT THAT HAD THE CORRECT PART NUMBER OF THE HEAT EXCHANGERS WAS THE JOB CARD AND THIS WAS NOT ISSUED. THE RPTR SAID THE MANUFACTURER'S AND ACR'S ILLUSTRATED PARTS CATALOG DID NOT LIST THE CORRECT PART NUMBER. THE RPTR SAID THE MSSD (A COMPUTER DISPLAY LISTING THE PARTS EFFECTIVITY FOR ACFT TYPE AND MODEL) WAS ALSO IN ERROR. THE RPTR STATED THE CARRIER HAS BROUGHT THE DOCUMENTS UP-TO-DATE AND HAS ALLOWED MD80 HEAT EXCHANGERS TO BE USED ON THE DC9 ACFT.