As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR DID NOT EXTEND ON FIRST DOWN GEAR SWITCH SELECTION. EXTENDED 30 SECONDS AFTER THE THIRD GEAR DOWN LEVER SELECTION DURING QRH TROUBLESHOOTING. REMOVED AND REPLACED LANDING GEAR SELECTOR LEVER IAW EMB 170 AMM 32-33-01. PERFORMED GEAR SWINGS AND EMERGENCY EXTENSION OF GEAR IAW EMB 170 AMM 32-34-00. LUBED UPLOCK ROLLER IAW EMB 170 AMM 32-00-03 AND CHECKED NLG UPLOCK, DOWNLOCK AND DOOR SENSOR TARGET GAP IAW EMB 170 AMM 32-61-03, 32-61-05, AND 32-61-03. OPS CHECK GOOD AT THIS TIME.