As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MUSTY SMELL FROM A/C PACKS, STARTED DURING T/O ROLL AND CONTINUED DURING CLIMB. SMELL GONE AT CRUISE. PERFORMED ENGINE WASH AT LAST NIGHT STATION. WITH THAT INFO WE CHANGED RECICULATION FILTER AND RAN PACKS, CHECKED OK. MM 21-25-01. FIM 21-00 TASK 806.