As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 0777 - IAH - THE NLG TOOK APPROXIMATELY 10 SECONDS LONGER TO EXTEND THAN THE MLG, ON APPROACH TO IAH. WHEN THE NOSE GEAR DID EXTEND IT WAS ACCOMPANIED BY A BANG. MAINTENANCE FOUND THE NLG HYDRAULIC TRANSFER CYLINDER AT FAULT. THE TRANFER CYLINDER WAS REMOVED AND REPLACED. IN ADDITION, THE DRAG BRACE WAS LUBRICATED. OPERATION OF THE NLG CHECKED GOOD. (W)