As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER FUSELAGE STRINGER REPAIR, A LEAK CHECK OF THE PITOT STATIC SYSTEM WAS CARRIED OUT AND WAS FOUND TO HAVE AN EXCESSIVE LEAK RATE. A FURTHER CHECK REVEALED THAT THE CAUSE WAS DUE TO PIN HOLES IN EACH AFT STATIC LINE. THE PIN HOLES WERE ATTRIBUTED TO CORROSION CAUSED BY WATER FROM A LEAKING WINDOW SEAL.