What was found
CREW REPORTED JUST AFTER TAKEOFF EXTREMELY LOUD STATIC NOISE ENVELOPED THE ENTIRE COMM 1&2 AND INTERCOM SYSTEM SO AS TO BE UNABLE TO COMMUNICATE WITH EITHER ATC OR FELLOW CREW MEMBERS. SLOWLY RETURNED TO NORMAL OPERATION ON 5 MILE FINAL. MX TROUBLESHOT BY CHECKING PIC & CP AUDIO JACK PANELS AND FOUND WIRE ROUTED ACROSS PIC'S PHONE JACK TERMINAL TANG, RE-ROUTED WIRE CLEAR OF TERMINAL. PERFORMED OPS TEST OF COMM I OPS CHECKS GOOD.