What was found
AFTER TAKEOFF, GEAR SELECTED UP, CREW REPORTED NORMAL RETRACTION & EICAS INDICATIONS, BUT A LOUD NOISE HEARD FROM NLG AREA. ACFT RETURNED TO FIELD & LANDED WITHOUT INCIDENT. MX REPLACED LGEU, NLG DOOR RELAY K0642, & NLG DOOR SOLENOID. FAULT RETURNED ON 6/2/2010 & DURING TROUBLESHOOTING, A GROUND FOUND AT PIN X2 ON K0642 RELAY SOCKET. CONNECTOR P0774 DISCONNECTED ON W014 HARNESS & PIN X2 NO LONGER GROUNDED. W014 HARNESS REPLACED WITH NO FURTHER DEFECTS NOTED. FAULT RETURNED AGAIN ON 6/4/2010 AND A BENT PIN FOUND ON MLG CONTROL LEVER CONNECTOR AND FAULTY UPLOCK PROX SWITCH IN NLG UPLOCK BOX. MLG CONTROL LEVER REPLACED ALONG WITH BOTH NLG UPLOCK PROX SWITCHES.