What was found
(CAN) WHILE PERFORMING THE DAILY INSPECTION, MAINTENANCE PERSONNEL HEARD A LOUD BANG, WHICH WAS FOLLOWED BY A DROP IN APU DUCT PRESSURE TO 0 PSI. UPON INSPECTION, 2 BLEED AIR DUCTS WERE FOUND RUPTURED, FORWARD OF THE APU LOAD CONTROL VALVE THAT CONNECT TO THE BLEED AIR BY-PASS VALVE. NO ADDITIONAL DAMAGE PROBLEMS WERE NOTED. NOTE: INFORMATION LISTED ABOVE IN AREA 9, BLOCK(B) PN. THE PN LISTED ARE FOR THE TWO DUCT ASSEMBLIES THAT WERE FOUND DAMAGED. DUCT P/N 69-47475-3 AND 69-47474-3 (TC NR 20070518005)