As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3251 DISC: AT GATE (BNA) APU BLEED ON STRONG ACRID (SMELL IN FLIGHT DECK ONLY) APU BLEED OFF SMELL IS NO LONGER PRESENT. ENG NOT RUNNING. C/A: DURING INSPECTION OF APU ODOR IAW A320 AMM 49-00 FOUND APU INLET SHROUD COVERED W/ OIL. C/W W/C 2100-2005. NO ISSUE FOUND AFTER APU WAS ISOLATED REFER TO LOG 5092125 FOR APU DEFERRAL. OK FOR SVC. C/W NO GO ODI PREVENTION. (LP: 5092124)