As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED AN ACRID SMELL IN CABIN SHORTLY AFTER TAKEOFF, CREW DECLARED AN EMERGENCY AND DIVERTED AIRCRAFT TO KIND, MAINT RESPONDED TO AIRCRAFT AND FOUND THE SMELL WAS A RESULT OF THE ENGINES HAVING A INTERNAL CORROSION TREATMENT THAT GOT INTO THE BLEED AIR SYSTEM, PERFORMED GROUND ENGINE RUNS TO REMOVE RESIDUAL CORROSION TREATMENT FROM BLEED AIR SYSTEM