As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PER MCC REQUESTED REPLACE LT DUCT INST BODY CROSSOVER AIR SUPPLY SYS(DUCT ONLY) SEALS PN 460-500 ON ASSY PN 14A640-101(<P>REMOVED AND REPLACED DUCT SEAL ON ASSY PN 14A640-101 ON LT DUCT BODY CROSSOVER AIR SUPPLY SYSTEM. IAW AMM 21-51-02 , SUB TASK 21-51-02-434-032. NO LEAKS NOTED AT THIS TIME.</P>)