What was found
AFTER GEAR RETRACTION, AROUND 1500' A LOUD AUDIBLE THUMP WAS FELT & HEARD FROM THE NOSE GEAR. NO OTHER INDICATIONS OBSERVED, ALL SYNOPTICS WERE NORMAL. GEAR CAME DOWN NORMALLY BEFORE LANDING. BEGAN TROUBLESHOOTING TO DUPLICATE THE DISCREPANCY OF THE LOUD THUMP THAT CREW FELT AND HEARD FROM THE NOSE LANDING GEAR AFTER THE RETRACTION. POWER UP AIRCRAFT, APPLIED HYDRAULIC POWER CART TO THE AIRCRAFT, APPLIED 3000 PSI. ACCOMPLISHED THE EXTENSION AND RETRACTION OF THE LANDING GEAR SYSTEM WE COULD NOT DUPLICATE THE DISCREPANCY. INSPECTED THE NOSE GEAR UP LOCK SWITCH MEASURED AND INSPECTED NO DEFECT NOTED. WITH THE GEAR EXTENDED INSPECTED THE MEASUREMENT OF THE NOSE GEAR STRUT TO VERIFY THE EXTENSION AND FOUND 9.75 INCH NO DEFECT NOTED, ACCOMPLISHED THE MANUAL GEAR RELEASE FUNCTIONAL CHECKS NO DEFECT NOTED. WITH A GEAR UP MONITORED AND VERIFIED THE LANDING GEAR SYSTEM UPLOCKS SWITCH SYSTEM COMPLETES THE CYCLE WITH NO CAS MESSAGE AND WORKS CORRECTLY. VERIFIED THE LANDING GEAR DOWN LOCK SWITCH SYSTEM CHECK GOOD THREE GREEN LIGHTS SHOWING, DOWN LOCK SWITCH CHECKS GOOD. RE-INSPECTED THE NOSE GEARS ASSEMBLY VERIFIED THE THREE TREADS SHOWING IN THE UPPER BARRELS BIG NUT NO DEFECT NOTED. INSPECTED THE UPPER BARREL STRUT PRESSURE INSPECTED THE PRESSURE FOUND 40 PSI LOW PRESSURE INDICATION, SERVICED THE UPPER BARREL STRUT TO THE CORRECT PRESSURE IAW CE-700 AMM 12-20-00 AN ACCOMPLISHED ARES DATA DOWNLOADED AND SENT TO TEAM FOR REVIEW, AFTER THE ARES REVIEW AND PER TEAM 700 RECOMMENDATION THE CAUSE OF THE LOUD THUMP COULD BE THE NOSE STRUT LOWER PRESSURE. AFTER THE CORRECTION OF THE PRESSURE IN THE NOSE STRUT, WE CYCLE MULTIPLE TIMES AND HAVE NO DEFECT NOTES. DOWN JACKED THE AIRCRAFT AND SERVICED THE HYDRAULIC IAW AMM 12-10-45. RESET ALL CIRCUIT BREAKER BACK TO NORMAL CONFIGURATION. PER TEAM 700 RECOMMEND PUTTING AIRCRAFT BACK TO NORMAL OPERATION NORMAL ALL THIS WORK WAS DONE IAW AMM 32 -32 -00 AND 32-31-00 32-00-00