As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACRID ODOR IN THE COCKPIT, DURING CLIMB OUT UP TO CRUISE. DISSAPATED AFTER LEVEL OFF , ESTABLISHED IN CRUISE. NO ISSUE COULD BE DUPLICATED. REPLACDE THE AIR PRESSURE FILTER ON BOTH SIDES IAW AMM 21-09. COMPLIED WITH AMM 21-00-01-100-801, NO OIL FOUND AND ACMS CHECKED OK. RAN PACKS IN FULL COLD & WARM ON APU & ENG AIR FOR EXTENDED TIME-NO ODOR PRESENT. OK FOR SERVICE.