What was found
NOSE GEAR REPEATEDLY RAISING INTO WHEEL WELL AT 13,000, 17,000, 23,000 FT CAUSING A LOUD BANGING NOISE. DID NOT NOTICE UNLOCK LIGHT ILLUMINATING. SERVICED NOSE GEAR OLEO IAW CE 750 MM CHPT 12-10-38. ACCOMPLISHED NOSE GEAR UPLOCK SWITCH RIG CHECK, RIG CHECK GOOD IAW CE 750 MM 32-30-05, ACCOMPLISHED LT & RT MAIN GEAR UPLOCK SWITCH CHECK, CHECKS GOOD IAW CE 750 MM CHPT 32-30-05, ACCOMPLISHED NOSE GEAR ROLLER UPLOCK RIG CHECK, CHECKS GOOD IAW CE750 MM CHPT 32-30-05. ACCOMPLISHED GEAR SWING & COLD SOAK CHECK, CHECKS GOOD IAW CE750 MM CHPT 32-30-05. NO PROBLEMS NOTED.