What was found
DURING NOSEGEAR RETRACTION, STRONG BANGING AND FLASHING UNSAFE LIGHT DURING MULTIPLE ATTEMPTS ON OCF. ALSO; GRINDING OR RUBBING SOUND DURING ALL GEAR RETRACTIONS ON TAKE OFF AND LEVEL FLIGHT. PERFORMED OPS CK PER CESSNA 680 MM 32-60-00. COULD NOT DUPLICATE. REMOVED BRAKE METERING VALVE P/N 9914652-6 S/N 208 AND INSTALLED SERVICEABLE BRAKE METERING VALVE P/N 9914652-6 S/N 298. PERFORMED OPS CK & LEAK CK GOOD I/A/W CESSNA 680 M/M 32-42-30