What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS AFTER LANDING GEAR IS EXTENDED ON FINAL APPROACH AIRCRAFT VIBRATES EXCESSIVELY. FLIGHT CONTROLS STABLE AND ENGINE PARAMETERS NORMAL. MAINTENANCE FOUND NLG AFT DOOR ROTATING ROD UPPER BUSHING WORN, L/H SIDE & R/H SIDE. ACCOMPLISHED DETAILED INSPECTION IAW AMM 52-82-00-220-801-A ON AFT NLG DOORS. MINIMAL PLAY FOUND. MAINTENANCE ALSO FOUND YELLOW HYDRAULIC ACCESS SEAL MISSING. REMOVED & REPLACED YELLOW HYDRAULICS ACCESS DOOR SEAL IAW AMM 52-41-23. MAINTENANCE ALSO FOUND RT WING AFT OUTBRD FLAP INBOARD END ROLLER COVER MISSING. REPLACED ROLLER COVER IAW AMM 27-54-61. OK FOR SERVICE.