What was found
(CAN) AC DIVERTED, AFTER HAVING A HYDR STAB NR 1 FAULT IN FLIGHT (LOST FAULT ON LANDING). MAINT C/OUT A HYDR CONTROL STABILIZER OPS CHECK IAW AMM 27-42-01, NO FAULT FOUND. ON FOLLOWING FLIGHT, SAME MESSAGE REAPPEARED ON THE MSDS (MULTI FUNCTIONAL DISPLAY SYSTEM) AT THE TOP OF THE DESCENT. MAINT TESTED THE STAB SYSTEM IAW AMM 27-42-01. ALL INDICATIONS FOUND NORMAL. FUNCTIONAL TEST OF STICKING SWITCH WAS C/OUT IAW AMM 27-42-01-710-054-A03. NO FAULTS FOUND. ON NR 1 ENGINE START, HYDRAULIC STAB 1 FAULT OCCURRED. MAINT TROUBLESHOOTING CONFIRMED THE NR 1 STAB PROXIMITY SWITCH P/N OFF, 8-644-01, S/N OFF, 330- P/N ON, 8-644-01, S/N ON, A2231) AT FAULT AND WAS REPLACED AND TESTED IAW AMM 27-42-01.