What was found
(CAN) AIRCRAFT MADE AN IN-FLIGHT RAPID DECOMPRESSION. THE FORWARD PART OF THE FRESH AIR DISTRIBUTION TUBE WAS FOUND TO BE DISCONNECTED. THE CLAMPS WERE REMOVED, INSPECTED, REINSTALLED, AND LOC WIRED TO PREVENT SLIPPAGE. THE SUBMITTER STATES THAT ALTHOUGH LOCKWIRING THE CLAMPS IS NOT IN THE MAINTENANCE MANUAL, LOCKWIRING GIVES BETTER SECURITY.