What was found
LG NOSE DOOR OPEN EICAS MESSAGE IN CRUISE ABOUT 1 HOUR AFTER TAKEOFF FL 340. MESSAGE EXTINGUISHED WHEN LG DOWN. NO NOISES OR OTHER EFFECTS NOTED. TEMP AT FL 340 APPROX -50 DEG C. REMOVED FROM SERVICE. WHILE MANIPULATING HARNESS AT R/ AFT PROX SENSOR (P0982) FAULT WOULD INTERMITTENTLY OCCUR, REMOVED PROX SENSOR HARNESS (AFT RH) REPINNED AND REPLACED CONNECTOR P0982 PER E175 WM 32-61-53 AND SWPM 20-50-10, 20-21-10. REINSTALLED PROX SENSOR HARNESS R/H AFT BY REATTACHING ALL CLAMPS AND CONNECTORS C/P'S PER E175 AMM 32-61-13-400-801-A & 32-61-00-990-002. C/W NLG AFT DOOR POSITION SENSOR FUNCTIONAL TEST IAW E175 AMM 32-61-13-720-802-A. NO FAULTS NOTED. DOOR POSITION SENSOR FUNCTIONAL CHECK GOOD. RETURN TO SERVICE.