As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING GEAR RETRACTION RUMBLING NOISE IN NOSE AREA. NOISE INTESIFIED WITH SPEED. DURING GEAR EXTENSION, NOISE BECAME QUIETER AND SOUNDED LIKE NORMAL WITH GEAR EXTENDED. C/A-REMOVED ANSD REPLACED NLG DOOR SEQUENCE PROX SWITCH IAW AMM 32-63-03. SEE LOG PAGE 4530783 ITEM #2 FOR OPS CHECKS.