As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING TERMINATING MONITOR, REMOVED LOWER ACCOUSTIC PANEL AND FOUND CORROSION ON THE LP COMPRESSOR CASE AT THE 6:00 O'CLOCK POSITION. REMOVED CORROSION THE COMPRESSOR CASE AND FOUND TO BE OUT OF LIMITS. MAINTENANCE REPLACED THE NR 1 ENGINE IAW JOB CARD 33L40071003.