A B737-500 WAS DISPATCHED AFTER A L AILERON WAS REPLACED. 3 DAYS LATER; AN AILERON SEAL AND RETAINER MARKED WITH THE ACFT NUMBER WERE FOUND ON THE DOCK.

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ON SEP/FRI/02; I WAS ASSIGNED TO INSTALL THE L-HAND AILERON ON ACFT X. I COMPLETED ALL STEPS UP TO STEP #12 ON JOB CARD XABCD. THIS INCLUDED THE CONNECTION OF THE BAL PANEL TO THE AILERON BY CONNECTING THE HINGE PINS. THIS STEP HAS A CLRNC TO CLOSE AND A SELL ITEM WHEN COMPLETED. THE ACFT WAS RELEASED TO SVC ON OCT/FRI/02. ON OCT/SUN/02 AT XA00; IT WAS BROUGHT TO MY ATTN THAT 2 HINGE SEALS AND RETAINERS WERE FOUND ON THE DOCK. ONE OF THE SEALS AND RETAINER WERE MARKED R-HAND AILERON ACFT X. THE OTHER WAS NOT MARKED. I WAS ASKED IF I REMEMBERED THE HINGE SEAL AND RETAINER BEING INSTALLED BY MY TEAM LEADER. I TOLD THEM THAT EVERYTHING WAS IN PLACE TO THE BEST OF MY KNOWLEDGE. BUT THESE SEALS AND RETAINER ARE NEVER REMOVED UNDER NORMAL REMOVAL AND INSTALLATION FOR AN AILERON. AN INSPECTOR AND MECH WERE CALLED IN AND ASKED IF; DURING THE CLRNC TO CLOSE; IF PANEL INSTALL CARDS WERE COMPLETED. THEY WERE ASKED IF THEY NOTICED ANYTHING MISSING. THEY DID NOT. AT THAT TIME; IT WAS DECIDED TO GND THE ACFT UNTIL AN INSPECTION COULD BE COMPLETED TO SEE IF THE RETAINER AND SEAL WERE INSTALLED. TO THE BEST OF MY KNOWLEDGE; EVERYTHING WAS INSTALLED CORRECTLY ON SEP/FRI/02. HOWEVER; THERE WERE RIG AND CABLE CHANGES NEEDING TO BE COMPLETED. I DID NOT; HOWEVER; RETURN TO DO ANY MORE WORK ON THE L-HAND AILERON. IF THE RETAINER AND SEAL WERE REMOVED ANY TIME AFTER THAT; IT WAS WITHOUT MY PERSONAL KNOWLEDGE.