What was found
PDIS 780 32-30 4516 26FEB20 MEM OPEN U LOGPAGES:2877688 AFTER TAKEOFF, GEAR DISAGREE EICAS WITH AMBER GEAR LIGHT. GEAR EXTENDED NORMAL. NO EMERGENCY DECLARED. SHGN 26FEB20 22:32 MEM U DEBRIEFED FLIGHT CREW. DURING GEAR RETRACT RECEIVED GEAR DISAGREE WITH AMBER GEAR LIGHT. NO EICAS MESSAGES LATCHED IN FAULT REVIEW. PERFORMED PSEU FAULT REVIEW IAW FIM 32-09/802. ALL FAULTS LISTED ASSOCIATED WITH NLG. FAULT CODES: 238, 65, 66, 79, 78, 77. SHGN 27FEB20 09:32 MEM REMOVED AND INSTALLED NEW SYSTEM 2 NOSE GEAR LOCKED SWITCH REF. AMM 32-61-03-02. SPLICED WIRES FOR NEW SYS 2 NOSE GEAR LOCKED PROX SNSR SW AT SP28 AND SP30 REF WDM 31-61-22. REMOVED AND REPLACED PROX SWITCH ELECTRONIC UNIT REF B757 AMM 32- 09-04-4. PERFORMED ADJ/TEST OF NOSE GEAR LOCK SWITCH IAW 757MM 32-61-03-2,NO FAULTS NOTED. PERFORMED NOSE GEAR EXTENSION /RETRACTION TEST IAW 757MM 32-34-00-5, NO FAULTS NOTED.