What was found
APPROXIMATELY 30 MINUTES AFTER DEPARTURE, A/C EXPERIENCE INTERMITTENT TOTAL COMM FAILURE AFTER DESELECTING ALL AUDIO PANELS EXCEPT CAPT'S PANEL, COMM WAS REESTABLISHED. FOUND FO'S ASP NR 1 AMP POSITION INOP, SWAPPED WITH 1ST OBS ASP SYSTEM, OPS NORM. COME CHECK AT SAN FRAN ON VHF AIR-LINK AND ADF PA USING MIC YOKE SW. OPS CHECK BAD, FOUND BROKEN WIRE AT CONNECTOR, REPAIRED WIRE OPS CHECK GOOD.