Narrative:

On aug/tue/04, aircraft X arrived in the evening for routine overnight maintenance which also included an a-chk. The aircraft was towed into the hangar at ZZZ international airport. I was assigned all of the l-hand engine routine and a-chk paperwork. I removed access panel #412AT as required by the inspection paperwork. This panel is located on the upper pylon. I removed this panel and placed it near the trailing edge of the pylon (l-hand). This visual inspection was then performed by myself and inspector. No defects were found and the inspection was signed off. I then completed and signed off the additional tasks. This lasted till the early morning hours of aug/wed/04. The aircraft was then towed outside the hangar for leak checks, final operations checks, and gate assignment, all of which was complied with. This was the end of my shift with several hours of overtime. Aircraft X flew revenue for 3 days when it arrived back in ZZZ for routine overnight maintenance, on aug/fri/04. A mechanic performed a walkaround, and while inside the aft equipment bay he noticed a light through the l-hand pylon. It was at this time access panel #412AT was discovered missing. The logbook was then reviewed and showed an a-chk was complied with on aug/wed/04. The mechanics on shift called me at the house since I performed the l-hand engine a-chk tasks. It was at this time that I realized I may not have installed access panel #412AT which was again placed at the trailing edge of the l-hand pylon. It is currently XA00 on aug/fri/04, and I am disclosing this information to explain what probably is the cause of a missing part to aircraft X. This is not a serialized part but is repairable and expensive. This is to help my company with paperwork issues that need to be completed so that aircraft X can be put back into an airworthy condition with as few delays or cancellations as possible, since there is no part removed on hand.

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Original NASA ASRS Text

Title: A CL65 WAS DISPATCHED IN NON COMPLIANCE WITH A L PYLON ACCESS PANEL NOT INSTALLED. THE PANEL WAS REMOVED FOR BORESCOPING AND NOT REINSTALLED.

Narrative: ON AUG/TUE/04, ACFT X ARRIVED IN THE EVENING FOR ROUTINE OVERNIGHT MAINT WHICH ALSO INCLUDED AN A-CHK. THE ACFT WAS TOWED INTO THE HANGAR AT ZZZ INTL ARPT. I WAS ASSIGNED ALL OF THE L-HAND ENG ROUTINE AND A-CHK PAPERWORK. I REMOVED ACCESS PANEL #412AT AS REQUIRED BY THE INSPECTION PAPERWORK. THIS PANEL IS LOCATED ON THE UPPER PYLON. I REMOVED THIS PANEL AND PLACED IT NEAR THE TRAILING EDGE OF THE PYLON (L-HAND). THIS VISUAL INSPECTION WAS THEN PERFORMED BY MYSELF AND INSPECTOR. NO DEFECTS WERE FOUND AND THE INSPECTION WAS SIGNED OFF. I THEN COMPLETED AND SIGNED OFF THE ADDITIONAL TASKS. THIS LASTED TILL THE EARLY MORNING HRS OF AUG/WED/04. THE ACFT WAS THEN TOWED OUTSIDE THE HANGAR FOR LEAK CHKS, FINAL OPS CHKS, AND GATE ASSIGNMENT, ALL OF WHICH WAS COMPLIED WITH. THIS WAS THE END OF MY SHIFT WITH SEVERAL HRS OF OVERTIME. ACFT X FLEW REVENUE FOR 3 DAYS WHEN IT ARRIVED BACK IN ZZZ FOR ROUTINE OVERNIGHT MAINT, ON AUG/FRI/04. A MECH PERFORMED A WALKAROUND, AND WHILE INSIDE THE AFT EQUIP BAY HE NOTICED A LIGHT THROUGH THE L-HAND PYLON. IT WAS AT THIS TIME ACCESS PANEL #412AT WAS DISCOVERED MISSING. THE LOGBOOK WAS THEN REVIEWED AND SHOWED AN A-CHK WAS COMPLIED WITH ON AUG/WED/04. THE MECHS ON SHIFT CALLED ME AT THE HOUSE SINCE I PERFORMED THE L-HAND ENG A-CHK TASKS. IT WAS AT THIS TIME THAT I REALIZED I MAY NOT HAVE INSTALLED ACCESS PANEL #412AT WHICH WAS AGAIN PLACED AT THE TRAILING EDGE OF THE L-HAND PYLON. IT IS CURRENTLY XA00 ON AUG/FRI/04, AND I AM DISCLOSING THIS INFO TO EXPLAIN WHAT PROBABLY IS THE CAUSE OF A MISSING PART TO ACFT X. THIS IS NOT A SERIALIZED PART BUT IS REPAIRABLE AND EXPENSIVE. THIS IS TO HELP MY COMPANY WITH PAPERWORK ISSUES THAT NEED TO BE COMPLETED SO THAT ACFT X CAN BE PUT BACK INTO AN AIRWORTHY CONDITION WITH AS FEW DELAYS OR CANCELLATIONS AS POSSIBLE, SINCE THERE IS NO PART REMOVED ON HAND.

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.