As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PARKED AT GATE WITH APU SELECTED, LEAK DISPLAYED ON BLEED 2 BUTTON AND EICAS WITH BURNING SMELL IN CABIN. FACT 04JUN25 22:13 ORD RAN PACKS 1 AND 2 OFF OF APU BLEED. NO BURNING SMELL NOTED.HEARD AIR RUSHING FROM PACK 2 AREA REMOVED PACK 2 PANEL AND FOUND BLOWN DUCT ON PACK 2 Y DUCT. R&R SLEEVE ON PACK 2Y DUCT IN REF TO AMM TASK 21-51-01-000/400-801-A OPS CHECK GOOD LEAK CHECK GOOD OK FOR SERVICE