Narrative:

During a letter check on ship xyz, air carrier 737-200 on aug/fri/00, XJ00 hours the inspection department found a migrated forward mount yoke bearing. I was involved in the engine drop and mount yoke replacement. I believed the yoke was installed per the routine cards and maintenance manual at the end of my shift. When I reported to work on aug/mon/00, at XI00 hours the inspection department had been looking at the removed yoke from ship xyz that had not been shipped for rework, and discovered a bushing at the inboard mount hole was still in the old yoke. It was brought to my attention to see. We might have missed the installation of the bushing. After reviewing the manuals we were sure the bushing was not installed on the new yoke. We then reported it to the maintenance foreman and told him we needed to take ship xyz OTS. The aircraft was at XXX airport and a crew was sent to install the bushing. The aircraft was returned to service on aug/tue/00. After reviewing how we missed the bushing we found the maintenance manual and our routine cards lacking detail for the bushing installation.

Related reports:

Google
 

Original NASA ASRS Text

Title: A B737-200 WAS DISPATCHED IN NON COMPLIANCE WITH A #2 ENG MOUNT YOKE BUSHING MISSING AFTER INSTALLATION OF REPLACEMENT YOKE.

Narrative: DURING A LETTER CHK ON SHIP XYZ, ACR 737-200 ON AUG/FRI/00, XJ00 HRS THE INSPECTION DEPT FOUND A MIGRATED FORWARD MOUNT YOKE BEARING. I WAS INVOLVED IN THE ENG DROP AND MOUNT YOKE REPLACEMENT. I BELIEVED THE YOKE WAS INSTALLED PER THE ROUTINE CARDS AND MAINT MANUAL AT THE END OF MY SHIFT. WHEN I RPTED TO WORK ON AUG/MON/00, AT XI00 HRS THE INSPECTION DEPT HAD BEEN LOOKING AT THE REMOVED YOKE FROM SHIP XYZ THAT HAD NOT BEEN SHIPPED FOR REWORK, AND DISCOVERED A BUSHING AT THE INBOARD MOUNT HOLE WAS STILL IN THE OLD YOKE. IT WAS BROUGHT TO MY ATTN TO SEE. WE MIGHT HAVE MISSED THE INSTALLATION OF THE BUSHING. AFTER REVIEWING THE MANUALS WE WERE SURE THE BUSHING WAS NOT INSTALLED ON THE NEW YOKE. WE THEN RPTED IT TO THE MAINT FOREMAN AND TOLD HIM WE NEEDED TO TAKE SHIP XYZ OTS. THE ACFT WAS AT XXX ARPT AND A CREW WAS SENT TO INSTALL THE BUSHING. THE ACFT WAS RETURNED TO SVC ON AUG/TUE/00. AFTER REVIEWING HOW WE MISSED THE BUSHING WE FOUND THE MAINT MANUAL AND OUR ROUTINE CARDS LACKING DETAIL FOR THE BUSHING INSTALLATION.

Data retrieved from NASA's ASRS site as of July 2007 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.