What was found
AIR INTERRUPT, EMER DECLARED, LANDING UNEVENTFUL & ACFT OVERWEIGHT. DURING CLIMB LT PACK STUCK IN HIGH MODE. AIR FLOW NOISE SO LOUD PILOTS UNABLE TO COMMUNICATE WITHOUT SHOUTING TO EACH OTHER. INSPECTED DUCTING IN E & E COMPARTMENT WITH NO LEAKS NOTED. PERFORMED CABIN TEMPERATURE CONTROL & INDICATION TEST IAW AMM 21-61-00, TESTED NORMAL. PERFORMED ENG BLEED AIR DISTRIBUTION TEST IAW AMM 36-11-00, TESTED NORMAL. FOUND NOISE & AIRFLOW NORMAL IN COCKPIT WHEN PERFORMING ALL TESTS.