As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON RECEIVING THE NEW PART P/N 6555030-11 IT WOULD NOT FIT THE ENGINE. THE ORIGINAL DUCT IS 27 .2500 INCH OUTSIDE AND 25.5 INCH INSIDE. THE NEW UNIT IS A FULL .5 INCH SMALLER IN DIAMETER ALL AROUND. THIS IS THE SECOND ISSUE WITH THESE DUCTS THE FIRST WERE MIS-DRILLED BY 2 DEGREES AT THE 1 AND 5 O’CLOCK POSITION. THIS NEW DUCT IS NOT EVEN CLOSE TO FITTING.