What was found
DEBRIEF FROM TEST FLIGHT CREW WAS THAT TEST FLIGHT WAS UNSAT. ODOR IN CABIN REMAINS ON CLIMB. REPORTED ODOR SMELLED LIKE A MUSTY FURNACE TURNING ON FOR THE FIRST TIME. REPLACED MID GALLEY HEATER. REF AMM 21-45-30-01A-720A. PERFORMED AIR DISTRIBUTION GROUND TEST, NO LEAKS NOTED. REPLACED MID GALLEY FWD AREA DUCT HEATER REF AMM 21-45-30-01A-720A-A UP TO STEP 1.D. TEST PASSED. COMPLIED WITH ECRA 2145-01058 STEPS 1 THRU 9, BOEING TOOK READINGS AND NEW HEATERS WERE REINSTALLED. AWAITING TEST FLIGHT VERIFICATION.