As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE COMPLING WITH PITOT-STATIC LEAK CHECK, FOUND EXCESSIVE LEAKAGE IN THE SYS THAT WE TRACED TO THE FLEXIBLE HOSES USED IN THE PITOT-STATIC PLUMBING. THE HOSES ARE FABRICATED FROM LOW PRESSURE HOSE. UPON CUTTING OPEN THE HOSES, FOUND THE INNER LINING WITH NUMEROUS CRACKS AND BROWN STAINING. THESE HOSES ARE ROUTED NEAR THE COCKPIT HEATING DUCTS. SUSPECT THE HOSE WILL NOT TOLERATE THE HEAT. THE MFG PN CM2944-6-6.00.