Narrative:

I am an inspector for Z airlines and on jun/ww/96 I received a routine job card to inspect the installation of the borescope plugs on aircraft #4 engine not being familiar with these plug locations, I asked another inspector who is borescope qualified on this type engine to assist me. As I read through the job card he pointed them out to me. I inspected these position and found all plugs to be secure. This happened at the maintenance facility. My foreman told me that after the aircraft was in service for a couple of days, one of the combustion plugs was found missing. My last day of work was on jun/xx/96. The aircraft left oakland jun/yy/96. I was informed on jun/zz/96.

Google
 

Original NASA ASRS Text

Title: RPTR MECH HAD BORESCOPED ENG AND SIGNED IT OFF. 2 DAYS LATER AFTER THE ACFT WAS BACK IN SVC A COMBUSTION PLUG WAS FOUND TO BE MISSING.

Narrative: I AM AN INSPECTOR FOR Z AIRLINES AND ON JUN/WW/96 I RECEIVED A ROUTINE JOB CARD TO INSPECT THE INSTALLATION OF THE BORESCOPE PLUGS ON ACFT #4 ENG NOT BEING FAMILIAR WITH THESE PLUG LOCATIONS, I ASKED ANOTHER INSPECTOR WHO IS BORESCOPE QUALIFIED ON THIS TYPE ENG TO ASSIST ME. AS I READ THROUGH THE JOB CARD HE POINTED THEM OUT TO ME. I INSPECTED THESE POS AND FOUND ALL PLUGS TO BE SECURE. THIS HAPPENED AT THE MAINT FACILITY. MY FOREMAN TOLD ME THAT AFTER THE ACFT WAS IN SVC FOR A COUPLE OF DAYS, ONE OF THE COMBUSTION PLUGS WAS FOUND MISSING. MY LAST DAY OF WORK WAS ON JUN/XX/96. THE ACFT LEFT OAKLAND JUN/YY/96. I WAS INFORMED ON JUN/ZZ/96.

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.