What was found
ALL RADIOS INTERMITTANT, HAD TO DISC ALL HEADSETS TO COMMUNICATE AND STILL INTERMIT. RTB IAH FOUND F/O'S ASP, I/C SWITCH SELECTED CAUSES AUDIO FEEDBACK OVER SPEAKERS. LASO ASP IN NR 3 POSITION, ALT/NORM SW IS BROKEN. REMOVED AND REPLACED REMOTE ELECTRONICS UNIT. OPS CHECK NORMAL, REF AMM 23-51-01 ROTABLE PARTS CHANGE WAS INDICATED-TT NR 1173879 SN OFF 2705 UNIT, ACCY, AUD OFF 29-2351-9-0001 2705 ON 29-2351-9-0001 2191. REMOVED & REPLACED F/O'S 1ST OBS ACP DUE TO PREVIOUS T/S. OPS CHECK NORMAL, PER AMM 23-51-02. ROTABLE PARTS CHANGE WAS INDICATED-TT NR 1248653 SN OFF 6662 TT NR 1011936 SN OFF 5247 PANEL, AUDIO SE OFF 29-2351-9-0003 6662 ON 29-2351-9-0003 4214 PANEL, AUDIO SE OFF 29-2351-9-0003 5247 ON 29-2351-9-0003 2141.