What was found
AIRCRAFT WAS GNDED, AIR INTERRUPT, EMER DECLARED, LANDING UNEVENTFUL & ACFT WAS OVERWEIGHT. DURING FLIGHT, CABIN CREW REPORTED SEEING SMOKE & VAPOR FROM THE AIR CONDITIONING VENTS & ODOR DESCRIBED VARIOUSLY AS BURNED RUBBER, ELEC & FUEL. ACCOMPLISHED CARD 21-96-01. R & R LT & RT PRESS REGULATING SHUTOFF VLVS & ACCOMPLISHED LEAK CHECK IAW AMM 21-31-01. SEE ALSO AALA 20160330010.