As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INBOUND F/A CREW ON FLT CREW ON FLT 2558 REPORTED ACRID SOUR SMELL SHORTLY AFTER TAKEOFF AND AGAIN SHORTLY BEFORE LANDING. REF LOG # 2969824. RAN APU & ENGS WITH MULTIPLE POWER SETTINGS & DIFFERECT BLEED/PACK CONFIGS. NO DEFECTS REF AMDS WORKCARD 0550 -2001. A/C OK FOR SVC. (LP# 4596368)