Narrative:

I was notified by mr X that an incident happened on aircraft which we worked on tuesday; that the #4 main tire hub cap fairing was found missing in ZZZ1 on wednesday. Aircraft was in ZZZ for a mvi pm service check. During the walkaround #4 main tire was worn beyond limits and needed to be changed. I assisted mr Y with the tire replacement. He installed the hub cap and safetied the mount attach bolts and then put his tools away and returned the tire cart while I finished the installation by putting the fairing on. No discrepancies were noted upon completion. How the fairing came off I have no idea. It was a routine tire change that was replaced per maintenance manual.

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Original NASA ASRS Text

Title: A B737-500 HAD #4 MAIN TIRE AND WHEEL ASSEMBLY REPLACED PER THE MAINT MANUAL. FIRST DOWNLINE STATION RPTS #4 MAIN HUBCAP FAIRING MISSING.

Narrative: I WAS NOTIFIED BY MR X THAT AN INCIDENT HAPPENED ON ACFT WHICH WE WORKED ON TUESDAY; THAT THE #4 MAIN TIRE HUB CAP FAIRING WAS FOUND MISSING IN ZZZ1 ON WEDNESDAY. ACFT WAS IN ZZZ FOR A MVI PM SVC CHK. DURING THE WALKAROUND #4 MAIN TIRE WAS WORN BEYOND LIMITS AND NEEDED TO BE CHANGED. I ASSISTED MR Y WITH THE TIRE REPLACEMENT. HE INSTALLED THE HUB CAP AND SAFETIED THE MOUNT ATTACH BOLTS AND THEN PUT HIS TOOLS AWAY AND RETURNED THE TIRE CART WHILE I FINISHED THE INSTALLATION BY PUTTING THE FAIRING ON. NO DISCREPANCIES WERE NOTED UPON COMPLETION. HOW THE FAIRING CAME OFF I HAVE NO IDEA. IT WAS A ROUTINE TIRE CHANGE THAT WAS REPLACED PER MAINT MANUAL.

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.