What was found
DURING GEAR RETRACTION, NLG CAME UP WITH A LOUD IMPACT NOISE,PAUSED THEN REPEATED,DRS NEVER DID SHUT....FIX:R&RD LG ELECTRONIC UNIT IAW AMM 32-32-01. OPS TEST/GEAR SWING SATISFACORY IN HANGER.REQ EVALUATION FLT...EVALUATION FLT SATISFACORY