What was found
DURING ICE TEST, CABIN DEPRESSURIZED. EMERGENCY DECLARED. PERFORMED A PRESSURIZATION CONTROL SYS TEST WITH CREW, OPERATED NORMALLY. NO DEFECTS NOTED. NR 2 ENGINE ANTI-ICE VALVE WOULD NOT OPEN DURING TEST. NO ASSOCIATED EICAS MESSAGES DISPLAYED. FOUND NO CORRELATED CMC MESSAGE. FOUND V-BAND CLAMPS SECURE, BUT ADJUSTABLE CLAMPS FOR BOTH DUCTS WERE LOOSE AND DUCT WAS NOT SECURED ON EITHER SIDE. SECURED THE ADJUSTABLE CLAMPS IAW IAW AMM 30-21-01-400-801-A. PERFORMED THREE GOOD OPS CHECKS IAW AMM 30-00-00-700-802-A/500.