What was found
UPON GEAR RETRACTION WITH THE HANDLE IN THE UP POSITION. THE RED, UNLOCK, LIGHT ILLUMINATED. PERFORMED THE APPROPRIATE CHECKLIST ITEM & ACTION RETURNED FOR LANDING WITHOUT FURTHER INCIDENT. VISUALLY INSPECTED LT, RT & NOSE UP LOCK SWITCHES, NO DEFECTS NOTED. CHECKED SWITCHES FOR PROPER ADJUSTMENT. NOSE UP LOCK ADJUSTED WITHIN LIMITS THE LT & RT SWITCHES WERE OUT OF ADJUSTMENT, SHORT. ADJUSTED BOTH TO 0.57 INCHES PERFORMED GEAR SWINGS, NORMAL INDICATIONS EACH TIME. THE RED UNLOCK LIGHT DID NOT ILLUMINATE ONCE UP & LOCKED. DOWN JACKED ACFT. SERVICED HYD RESERVOIR AS REQUIRED, OPERATIONS CHECKED GOOD. WORK DONE IAW MM 32-60-00 & 12-12-02.