As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A NOTICIBLE THUMP NOISE HEARD FROM NOSE GEAR AREA ABOUT 5 MIN AFTER TAKEOFF. NO ABNORMAL INDICATIONS ON LANDING GEAR OR HYDRAULICS. BUMP HEARD A SECOND TIME AT FL270, WITH NO OTHER ABNORMAL INDICATIONS. PERFORMED GEAR BUMP TROUBLESHOOTING IAW MM 32-30-00 ADJUSTED NLG UPLOCK SWITCH. PERFORMED NLG EMERGENCY EXTENSION CABLE RIGGING. ALL TESTS PASS AT THIS TIME. DONE IAW MM 32-30-00.