What was found
LEFT WING PITOT AND STATIC LINES CHAFING AT 2 BULKHEADS IN NACELLE JUST AFT OF FIREWALL. BOTH LINES ARE AL. .1875 INCH AND BOTH WERE CHAFED ALMOST THROUGH. SUBMITTER SUGGESTS THERE NEEDS TO BE RUBBER GROMMETS INSTALLED IN THOSE .5625 INCH HOLES. INSTALLED GROMMETS AND INSTALLED NEW TUBING WITH AN 'AN' FITTING SPLICE ON INBOARD SIDE AND RECONNECTED TO BULKHEAD FITTING ALREADY THERE.