What was found
THE -GEAR MONITOR- EICAS STATUS MESSAGE DISPLAYED. PRIMARY & ALTERNATE LANDING GEAR POSITION INDICATION DISAGREE. [07-27-07] ACCOMPLISHED PROXIMITY ELECTRONICS UNIT SYSTEM TEST NO FAULTS PSEU OPERATES NORMAL. CLEANED BLEED ISOLATION VALVE CONNECTOR. OPERATED NUMERS TIMES, CHKS OK. MESG LINKED TO NR 4 HYD SYS TEMP INDC. AFTER CHRONIC PROBLEM & REPEATED TROUBLESHOOTING, RPL TEMP XMITTER. NR 4 HYD SYS OPS CKS NORMAL. ALSO FOUND WIRES CHAFED THROUGH IN SEVERAL SPOTS IN SAIL TAIL AREA AND ONE SOCKET PUSHED BACK A LITTLE AT CONNECTOR D43700P. REPLACED WIRES W4544-231-20R & B PER SVCE TIP. QTY INDICATION NORMAL.