What was found
THE RT OB NACELLE FITTING PART NUMBER 5292029-24 WAS FOUND TO BE CRACKED DURING BORESCOPE INSPECTION PRESCRIBED BY TEXTRON MULTI-ENGINE SERVICE LETTER MEL-54-02R2 DATED MARCH 29, 2017 AS CONTINUING ACTION REQUIRED BY AD2017-10-09. THE CRACK IS FAINT BUT VISIBLE TO THE NAKED EYE AT THE LWR LEG OF THE OB PORTION OF THE FITTING BEST ILLUSTRATED IN THE FIGURE 1 OF TEXTRON MEL-54-02R2. IN SITU IMAGES ARE AVAILABLE IF REQUESTED. THIS FITTING WAS INSTALLED ON 07/24/2014 AND HAS ONLY ACCUMULATED 2669.5 HOURS IN SERVICE PRIOR TO THIS FINDING. AS AD2017-10-09 IS WRITTEN, THE FITTING WOULD NOT REQUIRE INITIAL INSPECTION UNTIL 3500 HOURS IN SERVICE OR 100 HOURS TIME IN SERVICE AFTER THE EFFECTIVE DATE OF AD; WHICHEVER OCCURS LATER. WE APPLIED FOR AND RECEIVED AMOC TO THIS AD TO LINE UP A REPETITIVE 60 HOUR REPEAT TO RUN CONSISTENT WITH OUR APPROVED AIRCRAFT INSPECTION PROGRAM REGARDLESS OF FITTING TOTAL TIME. THIS FITTING HAS BEEN INSPECTED TIME IN ACCORDANCE WITH TEXTRON MEL-54-02 10 TIMES PRIOR TO IDENTIFICATION OF THIS FINDING. THE FITTING WILL BE REPLACED WITH A NEW PART.