As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REMOVED DEFECTIVE LT DUAL BYPASS VALVE AND INSTALLED REPAIRED UNIT. LEAK AND OPS CHECK GOOD AT THIS TIME WORK DONE IAW AMM 21-61-31 PACK NOW OPERATES IN MANUAL MODE ONLY DEFER CLEARED PLACARD REMOVED REF AFDL 527321-1 FOR OPERATION. (CLOSED)